VeoVa™ Latices for Solvent-Free and Low-Odor Paints

Product Bulletin

VeoVa™ Monomer 10

VeoVa 10™ monomer is the vinyl ester of Versatic™ acid 10, a highly branched carboxylic acid containing 10 carbon atoms.

VeoVa 10 monomer has a unique hy-drophobic bulky structure and is used in the production of a broad range of high quality latex polymers. VeoVa 10 monomer can be used as co-monomer with vinyl acetate, ethylene and various (meth)acrylates for the production of aqueous coating binders.

Structure and Properties:

Vinyl Ester:

Easily copolymerisable with various monomers such as vinyl acetate, ethy-lene, acrylates and methacrylates.

VAM / VeoVa 10 / Acrylic Terpolymers

Copolymer latices of vinyl acetate and VeoVa 10 have been successfully used to formulate traditional high quality emulsion paints. Incorporation of an additional soft acrylate such as BA or 2-EHA sufficiently reduces the MFFT to produce solvent-free paints.

Suitable VAM / VeoVa 10 / acrylic terpolymers can be made with various monomer ratios and prepared as either colloid-free or colloid stabilized latices.

These latices perform very well in a wide range of low-VOC decorative paints. They can be made in standard emulsion reactors and unlike ethylene modified VAM (VAE) polymers do not require high.

VAM / VeoVa 10 / Acrylic Terpolymers

Polymer Type Monomer Ratio MFFT

Colloid-free latices

VAM / VeoVa 10 / BA 60 / 20 / 20 5 °C

VAM / VeoVa 10 / BA 55 / 15 / 30 0 °C

Colloid-stabilised latices

VAM / VeoVa 10 / EHA 55 / 20 / 25 0 °C

VAE - 0 °C

Versatic 10:

Hydrophobic

UV resistant

Hydrolytically stable

CHCH2

CH3

R2

R1CCO

O

Vinyl Ester

Low VOC coatings

There is an increasing demand for paints with virtually no emission of volatile organic compounds (VOC). In emulsion paints coalescing solvents by far repre-sent the largest part of the VOC in the paint. To formulate solvent free paints the latex needs to have an MFFT of about 0 – 5 ºC. Emulsion polymers with the desired MFFT can be prepared by copolymerization of low Tg flexibilizing monomers.

VAM

VeoVa 10

BA

2-EHA

+ 32 °C

- 3 °C

- 40 °C

- 50 °C

Homopolymer Tg

VAM

Cheap but hard monomer

VeoVa 10

Flexibilizing and hydrophobic monomer

Soft acrylates

Highly flexibilizing co-monomers

of Versatic 10R1 + R2 =

7 carbon atoms

Matt interior paints

One of the most important properties for interior wall paints is their scrub resistance. In general the elimination of coalescing agents and use of low MFFT latices leads to a poorer scrub resistance compared to conventional paints.

VA / VeoVa 10 / 2-EHA colloid-stabilized terpolymers containing a small amount of a cross-linkable silane monomer exhibit a very good mud-cracking resis-tance and scrub resistance especially at very high pigmentation (PVC) levels. They outperform VAE polymers with a similar MFFT.

Silk paints

The typical gloss level of silk paints is achieved at around 25% to 45% PVC. The relatively high polymer content makes the paints more sensitive to blocking. The silane containing VA / VeoVa 10 / 2-EHA terpolymer de-scribed above exhibits a very good blocking resistance comparable to that of VAE polymers. VeoVa 10 furthermore contri-butes to make the coating resis-tant to water and household chemicals.

To maximize the gloss potential of these silk paints a delicate balance between sagging and levelling is nec-essary. Whereas many emulsion paint binders can only offer a good levelling at the expense of bad sag resistance, the VeoVa 10 binders are well known for their balanced rheological performance. In addition the colloid-stabilized nature of the polymer leads to an increased open-time of the paints compared to acrylic and styrene / acrylic based polymers.

10

0

Blo

ckin

g re

sist

ance

[ A

STM

D 4

946-

89 ]

Blocking resistance of 35 % PVC silk paint

9

8

7

6

5

4

3

2

1

VA / VeoVa 10 / 2-EHA VAE (commercial)

excellent

poor

10

10

Sag

resi

stan

ce[ A

STM

D44

00 ]

Sag resistance and levelling of 35 % PVC silk paint

8

6

4

2

0

2

4

6

8

VA / VeoVa 10 / 2-EHA VAE (commercial)

Leve

lling

[ AS

TM D

2801

]

excellent

excellent

poor

2000

0S

crub

cyc

les

[ DIN

]

Scrub resistance of matt paints

1500

1000

500

VA / VeoVa 10 / 2-EHA VAE (commercial)

75 % PVC

80 % PVC

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