Process for stabilizing the viscosity of polyvinyl acetals using

Details Process for stabilizing the viscosity of polyvinyl acetals using Process for stabilizing the viscosity of polyvinyl acetals using

1975-08-13

1977-04-12

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296B, 260 296N, 260 296MP, 260 296MN, 260 457R, 260 457P, 260 4585B, 260 4585T, C08L 2914

Patent

active

040174441

ABSTRACT:
Disclosed herein is a method for stabilizing the viscosity of polyvinyl acetal resins, especially those resins used as interlayers for laminated safety glass. The disclosed process comprises incorporating a buffer having a pH in the range of from 3 to 7 into the plasticized polyvinyl acetal.

REFERENCES:
patent: 2396556 (1946-03-01), Cox
patent: 2456462 (1948-12-01), Stamatoff
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patent: 3271235 (1966-09-01), Lavin
patent: 3324065 (1967-06-01), Pierce
patent: 3402099 (1968-09-01), Christensen
patent: 3434915 (1969-03-01), Garrison
patent: 3468749 (1969-09-01), Mattimoe et al.
patent: 3810769 (1974-05-01), Blacker et al.

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