antifoamsfor the production of pvc · pvc defoamersare tested ... packaging,...
Post on 05-Jun-2018
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Datum | Name der Präsentation Seite | 2
Our Products are Suitable in All
Production Steps
TEGO®Antifoam application range
�
Polymerization
Reactor
�
Blowdown
Vessel
Monomer
Recovery
(Monomers, water,
surfactants, etc.)
Storage
Tank
StrippingColumn
Page | 3
The Sintered Glass Test is
Fast, Simple & Reliable
Preparation
� One litre surfactant solution in 2-litre cylinder
� Defined amount of prediluted antifoam is added
Procedure
� Air is passed through the sintered glass (6 l/min)
� Foam is generated
� Time to reach 2 litre mark is noted
� Test is finished
Interpretation
The measured time is used as paramater to evaluate
the defoamer performance. The longer the time the
better the defoamer.
PVC defoamers are tested at 60 °C.
Lab equipment for
sintered glass test
Page | 4
Sintered glass
To start, the cycliner is
filled with 1 l of surfactant
solution + defoamer
Time is noted when foam
reaches 2 l mark
The Sintered Glass Test – That is What it
Looks Like
Page | 5
TEGO Antifoams KE 600 & 2280 are
Perfect for S-PVC
0,1 % PVOH, standard for S-PVC(sintered glass test)
0
2
4
6
8
10
12
time [min]
TEGO
Antifoam
KS 53
TEGO
Antifoam
KS 95
TEGO
Antifoam
KE 600
TEGO
Antifoam
2280
Comp. 1
(silicon oil
based)
Comp. 2
(mineral oil
based)
Comp. 3
(vegetable
oil based)
low
high
Performance
Page | 6
TEGO Antifoams KS 53 & KS 95 are
Perfect for MS-PVC and E-PVC
1 % alkyl benzene sulfonate, standard for MS- and E-PVC(sintered glass test)
0
2
4
6
8
10
12
14
16
time [min]
TEGO
Antifoam
KS 53
TEGO
Antifoam
KS 95
TEGO
Antifoam
KE 600
TEGO
Antifoam
2280
Comp. 1
(silicon oil
based)
Comp. 2
(mineral
oil based)
Comp. 3
(vegetable
oil based)
low
high
Performance
Page | 7
Besides good antifoaming performance
Antifoams need to be compatible to:
� The production process, which should not be affected by the type
of antifoam you use
� The existing statutory regulations, like chemical inventories or
food contact regulations
� The properties of the PVC resin, no matter in which final application
it is used
Page | 8
How Antifoams can Affect the
Production Process
� Effect: separation of aqueous phase and polymeric particles
� Very seldom phenomenon which occurs only if very high amounts
of antifoam are used (> 1%).
Destabilisation of the slurry or latexDestabilisation of the slurry or latex
Inhibition of the polymerisationInhibition of the polymerisation
� Effect: polymerization yields no product or product with poor quality
� May occure in the production of E-PVC if antifoams are used
containing unsaturated C-C bonds
Page | 9
Tego Antifoams are Available for
All Types of PVC
Process Production stepTEGO®
AntifoamKS 53
TEGO®
AntifoamKS 95
TEGO®
AntifoamKE 600
E-PVC
Polymerisation
Blow-downStripping
Mikro S-PVC
Polymerisation
Blow-downStripping
S-PVC
Polymerisation
Blow-downStripping
––
first recommendation
alternative recommendation
not recommended for this application
TEGO®
Antifoam2280
–
Page | 10
Antifoams Need to be Listed
� Necessary to avoid limitations for final use of PVC grade
� Most important: FDA, European directive 2002/72/EC
Listing correlated to food contactListing correlated to food contact
National chemical inventoriesNational chemical inventories
� Necessary to sell a product in countries with chemical inventories
� Inventories exist all over the world
Page | 11
Overview of Food Contact
Inventories for our PVC Antifoams
2002/72/EC: Commission Directive of 6 August 2002 relating to plastic materials and
articles intended to come into contact with foodstuffs.
Directive
2002/72/EC
FDA
176.210
TEGO®
Antifoam
2280
TEGO®
Antifoam
KE 600
---
TEGO®
Antifoam
KS 95
TEGO®
Antifoam
KS 53
���� Most of our products can be used for food contact applications
Page | 12
Tego Antifoams for PVC are Listed
in all National Inventories
TSCATSCA
DSLDSL
EINECSEINECS
ENCSENCS
AICSAICS
ECLECL
PICCSPICCS
IECSCIECSC
���� Our products can be sold in every country of the world without limitations
Page | 13
Which Effect Antifoams can have on
PVC resins
Increase electrical conductivity: cable isolationIncrease electrical conductivity: cable isolation
Fogging: automotive industryFogging: automotive industry
Hazy films: production of clear filmsHazy films: production of clear films
Reduced printability and foamability: packaging, cable, tubesReduced printability and foamability: packaging, cable, tubes
Welding properties: assembling of window framesWelding properties: assembling of window frames
Page | 14
Which Antifoam for Which Application?
PVC propertyTEGO®
AntifoamKS 53
TEGO®
AntifoamKS 95
TEGO®
AntifoamKE 600
TEGO®
Antifoam2280
Fogging behavior
Transparency of films
Electric resistance
Welding properties
Printability and foamability
no negative influence observed
influence may occur (depending on defoamer dosage and the total PVC formulation
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