UV stable polyvinyl butyral sheet

Details UV stable polyvinyl butyral sheet UV stable polyvinyl butyral sheet

1996-03-25

1997-04-08

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524400, C08K 534

Patent

active

056188633

ABSTRACT:
Polyvinyl butyral sheet for laminated safety glass containing multivalent, preferably divalent, metal salt and a UV-stabilizing amount of a benzotriazole-based compound of the formula ##STR1## wherein R.sub.1 denotes CH.sub.3, linear or branched C.sub.5 alkyl or linear or branched C.sub.12 alkyl and R.sub.2 denotes CH.sub.3 or linear or branched C.sub.5 alkyl.

REFERENCES:
patent: 3441361 (1969-04-01), Tocatlian
patent: 3823113 (1974-07-01), Reisman
patent: 4952457 (1990-08-01), Cartier et al.
Tinuvin 328 Ultraviolet Light Absorber For Plastics and Coatings, Ciba Geigy Sales Brochure.
Tinuvin 571 Ultraviolet Light Stabilizer, 1991, Ciba Geigy Sales Brochure.

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