Patent · US Expired

Pulverulent polymer composition, a process for its preparation and adhesive based thereon

US4481328A · kind A · utility

19Cited by

4References

10Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Albrecht Harreus · Ludwigshafen, DE
Eduard Kaiser · Kelkheim, DE
Detlev Seip · Kelkheim, DE
Wolfgang Zimmermann · Kelkheim, DE

Key dates

Filing date	Jan 15, 1982
Grant date	Nov 6, 1984
Priority date	—
Expiry date	Jan 15, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S524/904
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.