High Performance Water Repellent Acrylic Latices for Exterior Wood Coatings. David Vanaken, Momentive Specialty Chemicals

High Performance Water Repellent Acrylic Latices for Exterior Wood Coatings David Vanaken, Momentive Specialty Chemicals [email protected] ...
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High Performance Water Repellent Acrylic Latices for Exterior Wood Coatings David Vanaken, Momentive Specialty Chemicals [email protected]

Outline

„ Objectives of this work „ Hydrophobic vinyl ester monomers „ Results ‰Synthesis and Characterizations of latices ‰Formulation and evaluations of wood coatings „ Conclusions

Objective Understanding the effect of a hydrophobic branched vinyl ester monomer on: „Key performance binder properties (VE10/acrylic = Veocryl) „Key exterior wood stain performance properties Benchmarking against : „2-ethylhexyl acrylate (2-EHA) as hydrophobic acrylic monomer. „Commercial Acrylic latices (for Deco and Industrial Wood Coatings) „A solvent-borne Alkyd woodstain „A waterborne acrylic woodstain

Neo acids from the Koch Reaction

R1 and R2 are alkyl groups 1

1

1

R

CH2

+H

+

C

2

R

CH3

R

+

+ CO CH3

1

+

R

C 2

R

2

R

+ H2 O

O

From olefins ……

R

O

2

R

- H+

H3C

OH

…… to neo acid isomer mixtures

Examples C5 Neoacid

=

Pivalic acid

C9 Neoacid

=

Neononanoic acid

C10 Neoacid

=

Neodecanoic acid

4

Vinyl Esters of Neo acids

Vinyl ester

(Homopolymer) Vinyl Neodecanoate (VE10) Tg = -3°C

Neo acid

Vinyl Neononanoate (VE9)

5

Tg = +70°C

Hydrophobic monomers Water solubility as indicator of hydrophobicity

Monomer

Water Solubility at 20°C (g/100g)

Branched Vinyl Ester (VE10)

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