Method for making paintable silicone surfaces and elastomer

Details Method for making paintable silicone surfaces and elastomer Method for making paintable silicone surfaces and elastomer

1975-05-19

1976-05-18

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 312R, 260 328SB, 260 332SB, 260 338SB, C08K 501

Patent

active

039577147

ABSTRACT:
Mixing under substantially anhydrous conditions, below 60.degree.C. and under shear conditions which do not substantially alter filler structure, 100 parts by weight of a hydroxyl endblocked polydimethylsiloxane, 70 to 150 parts by weight of a finely divided agglomerated precipitated acicular calcium carbonate, 35 to 200 parts by weight of organic solvent, from 12 to 20 parts by weight of monoalkyltriacetoxysilane and a catalytic amount of an organotin carboxylate, a curable mixture which is storable under anhydrous conditions is obtained. Exposing this curable mixture to atmospheric moisture and allowing the organic solvent to evaporate provides a cured coherent solid elastomeric material which is paintable with at least one type of decorative organic base paint which forms a continuous coating over the surface and adheres thereto. Silicone rubber compositions are also described which cured to elastomers having paintable surfaces.

REFERENCES:
patent: 3836503 (1974-09-01), Schulz

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