Dr. Mouhcine Kanouni

BU Additives

January 2016

LIGHT STABILIZER FOR

COATINGS

Business Unit Additives

2

• The Additives Business Unit is an important supplier of

products with functional effects for coatings, printing inks,

adhesives, plastics and specialty applications.

• The product range includes:

• Polymer Additives: light stabilizers, antioxidants and

antistatics for effects in coatings, plastics and many other

applications.

• Waxes: broad product range serving coatings, plastics,

inks, adhesives and special applications.

• Flame retardants: halogen-free products for use in

intumescent coatings and engineering thermoplastics for

E&E applications.

Current portfolio

Confidential, Additives for coatings3

Additives for Waterborne 1K & 2K

Coatings

Additives for Powder Coatings

Additives for Solventborne 1K & 2K

Coatings

Function Chemical Class Supply form

UV absorbers

Hostavin 3042 disp. Benzophenone 40% aqueous dispersion

Hostavin 3310 disp. Benzotriazole 52% aqueous dispersion

Hostavin 3326 disp. Halogenated benzotriazole 52% aqueous dispersion

Hostavin 3330 disp. Triazine 52% aqueous dispersion

HALS

Hostavin 3051-2 disp. Non-substituted HALS 52% aqueous dispersion

Hostavin 3070 disp. Oligomeric HALS 52% aqueous dispersion

Hostavin PR-31 disp. Reactive HALS 52% aqueous dispersion

Multifunctional

Hostavin 3220 disp. Benzotriazole and HALS 52% aqueous dispersion

Hostavin 3225-2 disp. Halogenated Benzotriazole and HALS 52% aqueous dispersion

Waterborne coatings

4

Function Chemical Class Supply form

UV absorbers

Hostavin PR 25 Benzylidene malonate 100% powder

Hostavin 3206 liq.* Oxalanide 80% xylene solution

Hostavin VSU Oxalanide 100% powder

HALS

Hostavin 3050 liq. Non-substituted HALS 100% wax

Hostavin 3051 Non-substituted HALS 100% powder

Hostavin 3052 liq. Reactive HALS 100% liquid

Hostavin 3053 liq. Non-substituted HALS 80% xylene solution

Hostavin 3055 liq. Non-substituted HALS 100% liquid

Solventborne coatings

5

* also for UV Coatings

Function Chemical Class Supply form

HALS…

Hostavin N30 Oligomeric HALS 100% powder

Hostavin PR 31. Reactive HALS 100% powder

Multifunctional

Hostavin 3212 liq. Oxalanilide and non substituted HALS 86% xylene solution

Antioxidants

Hostanox O3 Phenolic ester 100% powder

Hostanox P-EPQ Phosphinite 100% powder

Solventborne coatings

6

Function Chemical Class Supply form

UV absorbers

Hostavin VSU. oxalanilide 100% powder

HALS

Hostavin 3051 Non-substituted HALS 100% powder

Hostavin N30 Oligomeric HALS 100% powder

Antioxidants

Hostanox P-EPQ Phosphinite 100% powder

Hostanox O3 Phenolic ester 100% powder

Hostanox O310 Phenolic ester 100% powder

Powder & Coil coatings

7

Confidential, Additives for coatings8

Innovation and sustainabilityWith our Hostavin® dispersions

- 45%waste

- 40%waste water

- 35%direct and indirect emissions of greenhouse gases

- 45%direct CO2 emissions

- 30%energy consumption

- 25% water usage

● High concentrates of active ingredients (proprietary technology)

● No CO2 emission during processes and applications

● No waste water released during the processes

● Easy to mix dispersions

● No gas or VOC released in the environment

● No waste generated

● In scope with our 2020 objectives

9

Product Portfolio ReviewLight Stabilizers for SB, UV and Powder Coatings

Products Value PropositionCoating

SB PWD UV

UV

Ab

so

rber HOSTAVIN AR0 8

Most cost effective additive solution for light stability performance

(Benzophenone)

HOSTAVIN 3206 liq.

Good weathering, low in-can color, no discoloration with metallic

ions, excellent for QUV specifications, non interacting during UV

curing (Oxalanilide)

HOSTAVIN VSU Powder form, xylene free version of Hostavin 3206 (Oxalanilide)

HOSTAVIN 3330 UV absorber for superior performance requirement (Triazine)

Rad

ical

Sca

ven

ger

(HA

LS

)

HOSTAVIN 3051 Radical Scavenger with tribo effect

HOSTAVIN 3052 liq. Graftable Radical Scavenger for Plastic Coatings

HOSTAVIN 3058 liq.Non-basic HALS with high compatibility, for plastic coatings & non

interacting during UV curing

HOSTAVIN N 30 Cost competitive, Low migration, extraction polymeric HALS

HOSTAVIN PR-31 Low migration photo-reactable HALS

UV

A +

HA

LS HOSTAVIN TB-01 liq.

Synergistic solution of high performing HPT and standard HALS

for monocoat coatings

HOSTAVIN TB-02 liq. Synergistic solution of high performing HPT + non-basic HALS

Upcoming Additional Products to Complete Portfolio

Hostavin 3311 (UVA-BZT)

Hostavin 3324 (UVA-BZT)

Hostavin 3340 (UVA-HPT)

Hostavin 3063 (HALS)

10

11

Auto RefinishSolventborne Coatings

Standard

Performance

BZT 1130

Synergistic solution UV Absorber + HALS:

HOSTAVIN 3212

Low color for auto-refinish (in-can) & coatings on white basecoat

Excellent for QUV specifications

No discoloration with metallic ions

Synergistic solution UV Absorber + HALS :

HOSTAVIN TB 01

Key benefits

High performing light stabilizer solution (UVA/HALS)

New Solution for Solventborne 1K & 2K Coatings:Hostavin 3212

12

Solventborne 1K High Solid Acrylic Coating on White and Metallic Substrate (clearcoat 30-35µm)(Not acid Catalysed)

Weathering

QUV B: 0.71 W/m² at 313 nm (UV-B 313) on-going

WOM: boro/boro - ISO 4892-2 E2006 Wet/Dry on-going

HOSTAVIN 3212 LIQ

in Solventborne 2K PU

Hostavin 3212

Dr. Mouhcine Kanouni

BU Additives

January 2016

Thank You…

Public

Dr. Mouhcine KanouniBU Additives, Technical Marketing Coatings

Clariant International LTD

Rothausstrasse 61 | 4132 Muttenz 1, Switzerland

Mobile: +41 79 179 96 07 |Office: +41 61 469 66 53

E-Mail: mouhcine.kanouni@clariant.com

www.clariant.com

Degradation of coatings under UV light exposureStabilization possibilities

14

Stabilization possibilities

1. UV Absorbers Additives

Principle: absorption (filter effect) of damaging UV light (coating thickness and dosage dependent – Beer Lambert principle)

Suggested dosage:

• Clearcoat: from 1.0% to 2.5%

• Monocoat pigmented: none to 1.0%

2. Radical Scavengers (HALS) Additives

Principle: trapping of radicals before further propagation

reactions leading to degradation

Suggested dosage:

• Clearcoat: from 0.5% to 1.0%

• Monocoat pigmented: from 0.5% to 1.0%

- Low cost - Moderate weathering

- Low in-can color

- No discoloration with

metallic ions

- Good for QUV specifications

- Good weathering

- Good absorbance

- Excellent weathering

- Good absorbance

- Poor weathering due to

photo-permanence

- Weathering (moderate)

- Absorbance profile (limited)

Disadvantage- Color

- Discoloration with metal

ions

- Highest cost

UV Absorbers – Mechanisms of stabilization

– There are 4 main classes of UV Absorbers commonly used in coatings

15

N O

NO

H

H

OxalanilidesBenzophenones

O OH

OR

Benzotriazoles

N

N

N

OH

Triazines

N

N

N

R

R

OH

O

R

Advantage Disadvantage

UV absorbers – mechanisms of stabilization

16

Oxalanilide

Benzophenone

Triazine

Benzotriazole

Halogen. Benzotriazole

Natural sunlight

UV absorbance profile of most commonly used UV absorbers in coatings:

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

250 275 300 325 350 375 400 425

Wavelength [l in nm]

1.0

0.8

0.6

0.4

0.2

0

Ab

so

rpti

on

UV-C UV-AUV-B visible

Accelerated weathering tests –Differences between QUV and Xenon weathering

17

0

0.4

0.8

1.2

1.6

250 300 350 400

Wavelength [nm]

1.6

1.2

0.8

0.4

0

Irra

dia

tio

n [

W·m

-2 n

m-1

]

Spectral energy distribution

QUV: ASTM G 154-05 (UVCON-A and UVCON-B)

Xenon: ISO 4892-2 wet/dry

Oxalanilide

UVCON-B UVCON-A Xenon

Benzotriazole

Spectral energy distribution

Mechanisms of stabilization –Selection criteria for HALS

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basic (pH) HALS

R = - H not substituted

- CH3 methylated

non-basic HALS

R = - O - R’ etherified

- C - CH3 acylated

O

pH (basicity)

liquid or solid

compatibility

migration

cost

R' R''

N

R

tetra-methyl-piperidine

R’ and R’’ control secondary properties

(e.g. compatibility, solubility, volatility etc.)

=