Pulverulent polymer composition, a process for its preparation a

Details Pulverulent polymer composition, a process for its preparation a Pulverulent polymer composition, a process for its preparation a

1982-01-15

1984-11-06

Lieberman, Allan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524556, 524563, 524564, 524570, 524904, C08J 312, C08J 502, C08K 336, C08L 3104

Patent

active

044813287

ABSTRACT:
A pulverulent polymer composition which is readily pourable, has a low tendency to form dust and has good stability on storage is composed of a mixture of a vinyl ester polymer and a small proportion of a hydrophobic silica. The composition is prepared by spray drying an aqueous vinyl ester polymer dispersion in the presence of a hydrophobic silica. The silica is preferably a product from the reaction of a hydrophilic silica with an organochlorosilane. The composition can be redispersed in water and the films produced from such dispersions are transparent; they are suitable for the production of paints, glues and adhesives.

REFERENCES:
patent: 3738957 (1973-06-01), Iler
patent: 3883489 (1975-05-01), Matschke et al.
patent: 3907734 (1975-09-01), Ten Broeck et al.
patent: 3953487 (1976-04-01), Kratel et al.

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