(12) Oversettelse av europeisk patentskrift (19) NO

(11) NO/EP 2440604 B1

NORGE (51) Int Cl.

C08J 7/04 (2006.01) E04F 15/10 (2006.01)

Patentstyret

(21) Oversettelse publisert 2016.08.15

(80) Dato for Den Europeiske Patentmyndighets publisering av det meddelte patentet

2016.03.30

(86)

Europeisk søknadsnr 09779688.2

(86)

Europeisk innleveringsdag 2009.06.09

(87)

Den europeiske søknadens Publiseringsdato

2012.04.18

(84)

Utpekte stater

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

(73) Innehaver Tarkett G.D.L. S.a., Z.I. Eselborn - 2 Op der Sang, 9559 Lentzweiler, LU-

Luxembourg

(72) Oppfinner SICHE, Alexandre, Tarkett G.D.L. S.A. - R&D CenterZ.A. Salzbaach, L-9559 Wiltz, LU-Luxembourg

(74) Fullmektig Tandbergs Patentkontor AS, Postboks 1570 Vika, 0118 OSLO, Norge

(54) Benevnelse MULTILAYER SURFACE COATING WITH BARRIER LAYER

(56) Anførte

publikasjoner CA-A1- 2 349 052 DATABASE WPI Week 200141 Thomson Scientific, London, GB; AN 2001-384476 XP002573430 & JP 2001 081216 A (DAINIPPON PRINTING CO LTD) 27 mars 2001 (2001-03-27)

NO/EP2440604

1

Multilayer surface coating with barrier layer

Subject of the invention

[0001] The present invention relates to a PVC-based multilayer surface coating 5

comprising a barrier layer based on polyvinyl alcohol.

Prior art

[0002] For the interior or exterior decoration of a surface, for example, of a building, a 10

dwelling or a vehicle, decorative surface coatings based on polyvinyl chloride (PVC)

are well known and are widely used.

[0003] However, such PVC coatings have the drawback of being permeable to certain

substances. To prevent or limit this phenomenon, but also to prevent or limit the

penetration into the coating of soiling, irrespective of its nature, it has been proposed to 15

cover the outer surface of the upper and apparent layer of the surface coating with a

protective varnish of polyurethane type. However, this solution does not solve the

problem of the passage into the coating of contaminants present on the surface to be

covered, for example of contaminants originating from a bituminous ground, or else of

the adhesive which serves to fix the coating onto the surface. These contaminants 20

migrate through the various layers of the surface coating, which results in degradation

of the mechanical performance qualities and of the esthetic appearance of the coating.

JP 2001081216 describes a barrier film comprising a polyvinyl alcohol containing a

silicon atom in its structure. CA 2349052 describes a floorcovering with a barrier

layer. 25

[0004] Furthermore, for the manufacture of a PVC-based surface coating, and in

particular of a multilayer product, it arises that the manufacture of one or more coating

layers entails the use of recycled PVC originating from old decorative surface coatings.

Now, certain compounds, for example pigments used in the decor layer of these

recycled coatings, are found in the new integrating coating of the recycled PVC. In the 30

case of pigments, they result in degradation of the esthetic appearance and more

generally yellowing of the coating.

NO/EP2440604

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[0005] In order to reduce or eliminate the yellowing and to maintain the mechanical

performance of a PVC-based coating, the use of a barrier layer was proposed.

Generally, this is a film or covering based on polyester or polyamide. Polyvinyl

alcohol, which is well known for its barrier properties in packaging films, is not used

for a PVC layer, due to its poor adhesion to PVC, and in particular for a PVC layer 5

comprising a large amount of mineral fillers.

[0006] Conventionally, lining with a barrier film or covering with a barrier

composition is performed on at least one face of a surface coating, generally between

the support layer and the wear layer, optionally between the support layer and the

decorative layer of the decorative coating. 10

[0007] Although a covering step does not pose any particular problems, the use of a

film 10 to 20 µm thick has the drawback of requiring a lining step, which becomes

particularly critical during the continuous manufacture of a surface coating 4 meters or

5 meters wide, for example, since such barrier films are generally only available in

widths of 2 or 3.5 meters. 15

[0008] Furthermore, the use of a barrier layer based on polyester or polyamide makes

it very difficult, if not impossible, to recycle the PVC-based coatings covering them,

due to the need for a particular treatment that is not compatible, or is sparingly

compatible, with the majority of the processes for recycling PVC surface coatings.

20

Aims of the invention

[0009] The present invention proposes a solution that does not have the drawbacks of

the prior art.

[00010] The present invention proposes a surface coating comprising a barrier 25

layer that is an alternative to the barrier layers of the prior art and that is compatible

with the recycling of the surface coatings that comprise it.

[00011] The invention is also directed towards providing a surface coating

whose mechanical performance and esthetic appearance are less impaired over time.

30

Summary of the invention

NO/EP2440604

3

[00012] The present invention describes a multilayer surface coating comprising

a PVC-based layer, said layer comprising mineral fillers, said coating comprising a

barrier layer comprising polyvinyl alcohol and a silane compound, said silane

compound comprising at least one amine function.

[00013] According to particular embodiments, the surface coating according to 5

the invention comprises one or more, or any combination of several of the following

characteristics:

- the silane compound corresponds to the following formula:

in which R1, R2 and R3 are, independently of each other, either a hydroxyl group, a 10

methoxy group or an ethoxy group, and in which R4 is a group (CH2)n, n being equal to

1, 2 or 3, and in which R5 is, independently of R1, R2 and R3, a hydrogen, a linear or

cyclic alkyl, a phenyl, an amide group, or an aminoethyl group of formula –C2H4-NH-

R7, R7 being a hydrogen, an alkyl, a phenyl group, a benzyl group or a vinylbenzyl

group, 15

- the silane compound is chosen from the group formed by 3-

aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane,

aminoethylaminopropylsilanetriol, aminoethylaminopropyltrimethoxysilane, N-(2-

aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-

aminopropylmethyldimethoxysilane, N-2-(benzylamino)ethyl-3-20

aminopropyltrimethoxysilane, N-2-(vinylbenzylamino)ethyl-3-

aminopropyltrimethoxysilane, N-cyclohexylaminomethylmethyldiethoxysilane, N-

cyclohexylaminomethyltriethyoxysilane, N-cyclohexyl-3-

aminopropyltrimethoxysilane, N-phenylaminomethyltrimethoxysilane and 3-

ureidopropyltrimethoxysilane, vinylbenzylaminoethylaminopropyltrimethoxysilane, 25

- the silane compound represents, by weight, between 6% and 40% of the weight of the

polyvinyl alcohol,

- said coating comprises a support layer and a wear layer,

- the barrier layer is between the support layer and the wear layer and/or on the reverse

side of the support layer, 30

NO/EP2440604

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- the PVC-based layer, preferably the support layer, is foamed,

- the PVC-based layer, preferably the support layer, is compact,

- said coating also comprises a polyurethane-based protective varnish,

- said coating being a floorcovering.

[00014] The present invention also describes a process for manufacturing a 5

surface coating according to the invention, said process comprising a step of applying a

composition comprising polyvinyl alcohol and a silane compound comprising at least

one amine function, on at least one layer of said coating to form a barrier layer.

[00015] According to particular embodiments, the process for manufacturing the

surface coating according to the invention comprises one or more, or a combination of 10

any of several of the following characteristics:

- the application of the composition is performed by printing,

- the application of the composition is performed over a width of 4 or 5 meters,

- the composition is applied so as to form a barrier layer from 0.5 to 10 µm thick, in the

dry state, in the multilayer coating, 15

- the application of the composition takes place on the right side and/or the reverse side

of the support layer of the multilayer coating,

- the composition is prepared by producing a mixture comprising between 80% and

95% by weight of water, between 5% and 20% by weight of polyvinyl alcohol, and

optionally between 0.4% and 1.5% by weight of a wetting agent, the mixture being 20

heated beforehand, to between 90 and 95ºC, before the hot addition of the silane

compound which represents between 6% and 40% by weight (phr) relative to the

amount of polyvinyl alcohol.

Brief description of the figures 25

[00016] Figure 1 schematically represents a non-foamable PVC-based film or

layer comprising a barrier layer.

[00017] Figure 2 schematically represents a first embodiment of a multilayer

surface coating according to the invention, comprising a barrier layer. 30

[00018] Figure 3 schematically represents a second embodiment of a multilayer

surface coating according to the invention, comprising a barrier layer.

NO/EP2440604

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[00019] Figure 4 schematically represents a third embodiment of a multilayer

surface coating according to the invention, comprising a barrier layer.

[00020] Figure 5 schematically represents a fourth embodiment of a multilayer

surface coating comprising a barrier layer.

[00021] Figure 6 schematically represents a fifth embodiment of a multilayer 5

surface coating according to the invention, comprising a barrier layer.

Detailed description of the invention

[00022] The novelty of the present invention lies in the use of a composition, 10

comprising polyvinyl alcohol (PVOH) and a silane compound, as barrier layer for a

PVC-based surface coating, which is non-foamable or foamed. It may be a

floorcovering, a wall covering or a covering for the interior surfaces of a vehicle, for

example.

[00023] The application of polyvinyl alcohol to a PVC film, which is 15

furthermore charged, requires it to be made “compatible” beforehand with the PVC

substrate, i.e. to increase its adhesion to the PVC. Modifying PVC using additives of

isocyanate type is not envisageable since this solution is not only very expensive, but

also entails treating the PVC film or layer in the bulk and not at the surface. Moreover,

the use of isocyanates has the drawback of generating problems of viscosity of the 20

PVC layer and evolution of toxic gases.

[00024] It has been found, surprisingly, that a composition, comprising

polyvinyl alcohol and a functionalized silane compound, shows good adhesion to a

PVC film or layer, in particular to a PVC layer comprising mineral fillers, while at the

same time having a barrier effect against the release of plasticizers and/or 25

contaminants.

[00025] The composition, used for the barrier layer of the surface coating

according to the invention, is an aqueous polyvinyl alcohol solution comprising a

functionalized silane compound, said composition optionally comprising a wetting

agent, said wetting agent preferably being of the polyether-siloxane type. 30

[00026] The composition is prepared by producing a mixture comprising

between 80% and 95% by weight of water, between 5% and 20% by weight of

NO/EP2440604

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polyvinyl alcohol, and optionally between 0.4% and 1.5% by weight of a wetting

agent. The mixture is preheated, for example to between 90 and 95ºC, before the hot

addition, for example at about 80ºC, of the silane compound which represents between

6% and 40% by weight (phr) relative to the amount of polyvinyl alcohol. The

composition is left stirring at about 95ºC for about 60 minutes. 5

[00027] The silane compound is chosen from functionalized silane or silanol

compounds, preferably silane or silanol compounds comprising at least one amine

function.

[00028] Preferably, the silane compound corresponds to the following chemical

formula: 10

in which R1, R2 and R3 are, independently of each other, either a hydroxyl group, a

methoxy group or an ethoxy group, and in which R4 is a group (CH2)n, n being equal to 15

1, 2 or 3, and in which R5 is, independently of R1, R2 and R3, a hydrogen, a linear or

cyclic alkyl, a phenyl, an amide group or an aminoethyl group of formula –C2H4-NH-

R7, R7 being a hydrogen, an alkyl, a phenyl group, a benzyl group or a vinylbenzyl

group.

[00029] The silane compound is chosen from the group formed by 3-20

aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane,

aminoethylaminopropylsilanetriol, aminoethylaminopropyltrimethoxysilane, N-(2-

aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3—

aminopropylmethyldimethyoxysilane, N-2-(benzylamino)ethyl-3-

aminopropyltrimethoxysilane, N-2-(vinylbenzylamino)ethyl-3-25

aminopropyltrimethoxysilane, N-cyclohexylaminomethylmethyldiethoxysilane, N-

cyclohexylaminomethyltriethoxysilane, N-cyclohexyl-3-aminopropyltrimethoxysilane,

N-phenylaminomethyltrimethoxysilane, and 3-ureidopropyltrimethoxysilane,

vinylbenzylaminoethylaminopropyltrimethoxysilane.

NO/EP2440604

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[00030] Examples of barrier compositions according to the invention are given

in Tables 1 and 2. The proportion of the components is given as weight percentages

relative to the weight of polyvinyl alcohol (phr).

Table 1: Composition examples 5

T 1 2 3 4 5

WATER 809.1 809.1 809.1 809.1 809.1 809.1

PVOH 100.0 100.0 100.0 100.0 100.0 100.0

Sil-1 0.0 6.0 12.5 20.0 30.0 40.0

Wetting

agent

9.1 9.1 9.1 9.1 9.1 9.1

Table 2: Composition examples

T 6 7 8 9 10

WATER 809.1 809.1 809.1 809.1 809.1 809.1

PVOH 100.0 100.0 100.0 100.0 100.0 100.0

Sil-2 0.0 6.0 10.0 12.5 15.0 20.0

Wetting

agent

9.1 9.1 9.1 9.1 9.1 9.1

[00031] The polyvinyl alcohol is Elvanol® 90-50, Elvanol® 71-30, Elvanol®

70-75 from DuPont, or Exceval HR 3010, Exceval AQ 4104 from Kuraray. 10

[00032] The wetting agent is a polyether polydimethylsiloxane, for example

Byk®-307 from Byk, or Tego® Wet 270 from Evonik.

[00033] The silane compound Sil-1 is 3-aminopropyltriethoxysilane, for

example Z-6011 from Dow Corning®. The silane compound Sil-2 is

aminoethylaminopropyltrimethoxysilane, for example Geniosil® GF 9 or GF 91 from 15

Wacker, or Z-6020 from Dow Corning®.

[00034] Compositions comprising a functionalized silane compound, bearing an

epoxy group, or bearing an alkyl group, and also compositions comprising a mixture of

a silane bearing an epoxy group, or an alkyl group, and of a silane bearing at least one

amine group, were also prepared (Tables 3 and 4). 20

NO/EP2440604

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Table 3: Composition examples

11 12 13 14 15 16

Water 809.1 809.1 809.1 809.1 809.1 809.1

PVOH 100.0 100.0 100.0 100.0 100.0 100.0

Sil-3 6.0 12.5 20.0 0.0 0.0 0.0

Sil-4 0.0 0.0 0.0 6.0 12.5 20.0

Wetting

agent

9.1 9.1 9.1 9.1 9.1 9.1

Table 4: Composition examples

17 18 19

Water 809.1 809.1 809.1

PVOH 100.0 100.0 100.0

Sil-3 6.25 0.0 6.25

Sil-4 0.0 6.25 6.25

Sil-2 6.25 6.25 0.0

Wetting

agent

9.1 9.1 9.1

5

[00035] The silane compound Sil-3 is glycidoxypropyltrimethoxysilane, for

example Z6040 from Dow Corning®, and the silane compound Sil-4 is N-

octyltriethoxysilane, for example Z6341 from Dow Corning®.

[00036] The barrier composition has the advantage of being able to be applied

easily to a PVC film or layer, for example by printing, by photogravure or a roll-10

coating device. It is then possible to incorporate the step of laying the barrier layer into

a process for the continuous manufacture of a surface coating, either in 2 m or in 4 m

width, and optionally in larger width.

[00037] To evaluate the adhesion of the composition to a PVC-based layer,

optionally comprising mineral fillers, the composition is applied in the form of a 15

monolayer onto various PVC-based layers, and is then dried, for example for one

minute at 100°C, so as to form a film about 1 µm thick.

NO/EP2440604

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[00038] The adhesion of the barrier composition to the PVC is then evaluated

via a method that consists in scraping the product with a six-toothed comb, and then

evaluating, using a Tesa® 4124 adhesive tape, the peel strength. The adhesion is

considered to be good when no trace of film is stripped from the substrate. A note “1”

means that the adhesion is good and a note “3” means no adhesion. In the case of a 5

sandwich structure, i.e. a barrier layer between two support layers of the same nature,

the adhesion is evaluated by means of a peel test according to standard NF EN 431.

The results are presented in Tables 5 to 8.

Table 5: Adhesion of the compositions of Table 1 to various PVC-based supports 10

T 1 2 3 4 5

Recycled PVC support layer, comprising fillers 3 1 1 1 1 1

Foamable PVC support layer, comprising

fillers

3 1 1 1 1 1

Non-foamable PVC support layer, comprising

fillers

3 2 1 1 1 1

PVC film comprising fillers 3 1 1 1 1 1

Table 6: Adhesion of the compositions of Table 2 to various PVC-based supports

T 6 7 8 9 10

Recycled PVC support layer, comprising fillers 3 1 1 1 1 1

Foamable PVC support layer, comprising

fillers

3 2 2 1 1 1

Non-foamable PVC support layer, comprising

fillers

3 1 1 1 1 1

PVC film comprising fillers 3 1 1 1 1 1

Table 7: Adhesion of the compositions of Table 2 to various PVC-based supports

11 12 13 14 15 16

Recycled PVC support layer, comprising fillers 3 3 3 3 3 3

Foamable PVC support layer, comprising

fillers

3 3 3 3 3 3

NO/EP2440604

10

Non-foamable PVC support layer, comprising

fillers

3 3 3 3 3 3

PVC film comprising fillers 3 3 3 3 3 3

Table 8: Adhesion of the compositions of Table 3 to various PVC-based supports

17 18 19

Recycled PVC support layer, comprising fillers 3 3 3

Foamable PVC support layer, comprising fillers 3 3 3

Non-foamable PVC support layer, comprising fillers 3 1 3

PVC film comprising fillers 3 3 3

[00039] The support layer based on recycled PVC, which was used in the

adhesion evaluation, comprises 30% by weight of PVC, 55% of mineral fillers and 5

14% by weight of plasticizer.

[00040] The PVC-based foamable support layer, which was used in the adhesion

evaluation, comprises 100 phr of Pevikon® P682 and Pevikon® DP 2170 PVC,

117 phr of calcium carbonate (Omya BL 20) used as mineral filler, 2.9 phr of a

swelling agent, an azodicarbonamide (Porofor ADCL-C2), 1.38 phr of zinc oxide 10

(ZnO) used to lower the decomposition temperature of the swelling agent, 0.7 phr of

Titane RC 82, 30.3 phr of DIHP (Jayflex 77), 26.2 phr of DIBP (Palatinol® IC) and

14.5 phr of a dearomatized hydrocarbon used as viscosity-reducing agent (Exxsol

D100), “phr” meaning the percentage relative to the amount of PVC.

[00041] The PVC-based non-foamable support layer, used in the adhesion 15

evaluation, comprises 100 phr of Lacovyl PB 1702 H PVC, 156 phr of mineral filler

(Omya BL20), 45 phr of DIHP (Jayflex 77), 28 phr of DIBP (Palatinol IC) and 5 phr of

viscosity-reducing agent (Exxsol D100), “phr” meaning the percentage relative to the

amount of PVC.

[00042] The PVC film comprising mineral fillers, which was used in the 20

adhesion evaluation, comprises 100 phr of Evipol 6030 PVC, 100 phr of calcium

carbonate (Imerys Micronic P5) used as mineral filler and 33 phr of plasticizer DINP

from Exxon and 6 phr of stabilizer from Lagor (Lastab S DC 1211).

NO/EP2440604

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[00043] By comparing the various compositions tested and a control

composition (a composition based on polyvinyl alcohol not comprising any silane

compound – composition T), it is seen that a composition comprising a functionalized

silane compound comprising at least one amine function makes it possible to obtain

adhesion to a PVC layer or film comprising mineral fillers, whether the layer is non-5

foamable, or foamable and expanded.

[00044] In addition, compositions comprising a mixture of silane compounds,

having different functionalities, do not improve the adhesion.

[00045] Preferably, the functionalized silane compound represents between 6

and 40 phr (percentage relative to the polyvinyl alcohol). Advantageously, for a PVC-10

based non-foamable layer, the functionalized silane compound represents about 6 phr,

and for a PVC-based foamable layer, the functionalized silane compound represents

about 20 phr.

[00046] The adhesion of the composition in a “sandwich” application, between

two support layers, was studied (Table 8). An improvement in adhesion is noted. For 15

an amount of functionalized silane, comprising at least one amine function, of 15 phr,

the adhesion increases from 0 N/50 mm to 23 N/50 mm with a support layer 3 made of

recycled PVC, comprising fillers, and to 11 N/50 mm for a non-foamable support layer

3 made of PVC.

20

Table 8: Adhesion (in N/50 mm) of compositions according to the invention to various

supports

Composition T 6 7 8 9 10

Support layer

made of recycled

PVC, comprising

fillers

0 15 9 17 23 Inseparable

Non-foamable

support layer

made of PVC,

comprising fillers

0 4 4 7 11 28

NO/EP2440604

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[00047] The composition according to the invention may be applied in the form

of a monolayer, or optionally of several successive layers. The thickness of the

barrier layer, or of the barrier layers, in the surface coating, is preferably

between 0.5 and 10 µm, advantageously between 4 and 8 µm.

[00048] The barrier layer, of very low thickness, has the advantage of allowing 5

the PVC coating which comprises such a barrier layer to be compatible with the

standard processes for recycling PVC coatings, and thus allows such coatings

to be recyclable.

[00049] The “barrier layer” composition is applied to at least one of the layers of

a multilayer coating (figures 1 to 6). The composition is preferably applied to 10

the PVC-based support layer 3 of a multilayer coating. Optionally, a decorative

layer 5 may be applied either to the upper part of the support layer 3 (figure 4)

or to the barrier layer 2 covering the support layer 3 of a multilayer coating

(figure 5). Said decorative layer may be any adequate layer, and is preferably

an ink or a film comprising one or more decorative patterns. 15

[00050] The barrier layer composition is applied to the reverse side of the

support layer 3 and/or to the right side of the support layer 3. The term “reverse

side” means the lower part of the support layer 3 which comes into contact with

the surface to be covered, it being understood that the “right side” represents

the upper part of the support layer 3 which will be in contact with the wear 20

layer 4.

[00051] The support layer 3 may be non-foamable or foamable. In the case of a

foamable support layer 3, said layer comprises one or more pore-forming

agents, such as a sulfonyl hydrazone, for example P,P’-oxybis benzene sulfonyl

hydrazone, or an azodicarbonamide, for example Unifoam AZ Ultra 7043 or 25

Ultra 1050.

[00052] The barrier layer 2 shows good adhesion to the PVC layer onto which it

is applied, and has a barrier effect by preventing the migration of plasticizers

and/or contaminants through the surface coating, and more particularly towards

the decorative layer 5 (figures 4 to 6). 30

[00053] The barrier effect of the composition was evaluated by means of a tar

test, which consists in depositing liquid tar onto the reverse side of a multilayer

NO/EP2440604

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surface coating which comprises the barrier layer according to the invention

applied in wet form between 7 and 45 g/m2. The tar is left to migrate for one

week at a temperature of about 70°C. A note of between “1” and “5” is

attributed as a function of the appearance of a mark on the right side of the

floorcovering. “1” means that there is no difference with a surface coating 5

without tar, notes from “3” to “5” mean that the surface coating has an

appearance going from dark brown to black. The results are presented in

Table 9.

Table 9: Barrier effect 10

No

barrier

layer

T

22 g/m2

10

7 g/m2

10

15 g/m2

10

22 g/m2

10

35 g/m2

10

45 g/m2

On the

reverse side

of a non-

foamable

support layer

5 1 4 3 1 1 1

[00054] Preferably, the composition is applied to the support layer at between 15

and 45 g/m2 in wet form, advantageously at about 22 g/m

2, or about 35 g/m

2.

[00055] In the surface coating, the barrier layer preferably has a thickness of at

least 4 to 5 µm. 15

[00056] Preferably, the multilayer surface coating may also comprise a

protective varnish, for example based on polyurethane, applied to the upper

face of the wear layer 4.

[00057] The adhesion of the composition based on polyvinyl alcohol, whether or

not it comprises a functionalized silane compound, may also be improved by 20

using an attachment primer applied previously to the support layer 3.

Preferably, the attachment primer is a copolymer comprising acrylic acids, for

example Neocryl® A 1131, or XK 151 from DSM, a polyurethane dispersion,

for example Neorez R 989 from DSM, a polyisocyanate dispersion, for

NO/EP2440604

14

example Bayhydur® VP LS 2240, or a combination of these compounds. It is

also possible to use a mixture of dispersions of acrylic resins and of PVC.

NO/EP2440604

15

Key:

1: Non-foamable layer

2: Barrier layer

3: Support layer

4: Wear layer 5

5: Decorative layer

NO/EP2440604

16

Patentkrav

1. Flerlagsoverflatebelegg som omfatter et PVC-basert lag, idet laget innbefatter

uorganiske fyllstoffer, idet belegget omfatter et barrierelag (2) bestående av 5

polyvinylalkohol og en silanforbindelse, idet silanforbindelsen omfatter minst én

aminfunksjonell gruppe.

2. Overflatebelegg i henhold til krav 1, hvor at silanforbindelsen svarer til den

følgende formel: 10

hvori R1, R2 og R3 er, uavhengig av hverandre, enten en hydroksylgruppe, en

metoksygruppe eller en etoksygruppe, og hvor R4 er en (CH2)n-gruppe, n er lik 1, 2

eller 3, og hvori R5 er, uavhengig av R1, R2 og R3, et hydrogen, et lineært eller cyklisk

alkyl, et fenyl, en amidgruppe eller en aminoetylgruppe av formel -C2H4-NH-R7, idet 15

R7 er et hydrogen, et alkyl, en fenylgruppe, en benzylgruppe eller en vinylgruppe.

3. Overflatebelegg i henhold til krav 1 eller 2, hvor silanforbindelsen er valgt fra

gruppen dannet av (3-aminopropyl)trietoksysilan, (3-aminopropyl)trimetoksysilan,

aminoetylamino-propylsilanetriol, aminoetylaminopropyl-trimetoksysilan, N-(2-20

aminoetyl)-(3-aminopropyl)trimetoksysilan, N-(2-aminoetyl)-(3-aminopropyl)-

metyldimetoksysilan, N-[2-(benzylamino)etyl]-(3-aminopropyl)trimetoksysilan, N-[2-

(vinylbenzylamino)etyl]-(3-aminopropyl)-trimetoksysilan, (N-cykloheksylamino-

metyl)metyl-dietoksysilan, (N-cykloheksylaminometyl)tri-etoksysilan, N-cykloheksyl-

(3-aminopropyl)tri-metoksysilan, (N-fenylaminometyl)trimetoksysilan, (3-ureido-25

propyl)trimetoksysilan og vinylbenzylaminoetylaminopropyltrimetoksysilan.

4. Overflatebelegg i henhold til hvilket som helst av de foregående krav, hvor

silanforbindelsen representerer, på vektbasis, mellom 6 og 40 % av vekten av

polyvinylalkohol. 30

5. Overflatebelegg i henhold til hvilket som helst av de foregående krav, hvor nevnte

belegg omfatter et støttelag (3) og et slitasjelag (4).

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6. Overflatebelegg i henhold til krav 5, hvor barrierelaget (2) er plassert mellom

støttelaget (3) og slitasjelaget (4) og/eller på undersiden av støttelaget (3).

7. Overflatebelegg i henhold til hvilket som helst av de foregående krav, hvor det

PVC-baserte lag, fortrinnsvis støttelaget (3), er i skummet form. 5

8. Overflatebelegg i henhold til hvilket som helst av de foregående krav, hvor det

PVC-baserte lag, fortrinnsvis støttelaget (3), er kompakt.

9. Overflatebelegg i henhold til hvilket som helst av de foregående krav, hvor nevnte10

belegg i tillegg omfatter en polyuretan-basert beskyttende lakk.

10. Overflatebelegg i henhold til hvilket som helst av de foregående krav, i det nevnte

belegg er et solbelegg.

15

11. Fremgangsmåte for fremstilling av et flerlagsoverflatebelegg i henhold til et

hvilket som helst av kravene 1 til 10, omfattende et trinn med påføring av en

sammensetning omfattende polyvinylalkohol og en silanforbindelse som omfatter

minst én amin-funksjonell gruppe med minst ett lag av det nevnte belegg for å danne

et barrierelag (2). 20

12. Fremgangsmåte ifølge krav 11, hvor påføringen av sammensetningen utføres ved

trykking.

13. Fremgangsmåte ifølge krav 11 eller 12, hvor påføringen av sammensetningen blir25

utført over en bredde på 4 eller 5 meter.

14. Fremgangsmåte ifølge hvilket som helst av kravene 10 til 12, hvor sammen-

setningen blir påført slik at det dannes et sperrelag (2) med en tykkelse på 0,5 til

10 µm, i tørr tilstand, i flerlagsbelegget. 30

15. Fremgangsmåte ifølge hvilket som helst av kravene 10 til 13, hvor påføringen av

sammensetningen blir utført på oversiden og/eller undersiden av bærelaget (3) av

flerlagsbelegget.

35

16. Fremgangsmåte ifølge hvilket som helst av kravene 10 til 14, hvor preparatet

fremstilles ved å utvikle en blanding som omfatter mellom 80 og 95 vekt% vann,

mellom 5 og 20 vekt% polyvinylalkohol og eventuelt mellom 0,4 og 1,5 vekt% av et

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fuktemiddel, idet blandingen forvarmes til mellom 90 og 95 °C, før tilsetning under

varme betingelser av silanforbindelsen, som utgjør mellom 6 og 40 vekt% (phr) med

hensyn til mengden av polyvinylalkohol

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