Plasticizer containing polyvinylbutyral sheets having a reduced

Details Plasticizer containing polyvinylbutyral sheets having a reduced Plasticizer containing polyvinylbutyral sheets having a reduced

1977-10-12

1979-07-17

Michl, Paul R.

Stock material or miscellaneous articles

Composite

Of quartz or glass

260 306R, 260 316, 260 318R, C08K 517

Patent

active

041615654

ABSTRACT:
Plasticizer containing polyvinylbutyral sheets are known intermediate layers for glass laminates. Generally, the polyvinylbutyral used for this application contains certain amounts of vinyl alcohol units and vinyl acetate units. In order to adjust an optimum adhesion to glass, certain additives are mixed with the polyvinylbutyral, which additives must not cause discoloration of the laminate and deterioration of the transparency. Betains are especially suitable anti-adhesives, and efficient in very small amounts.

REFERENCES:
patent: 2680724 (1954-06-01), Oppenheim
patent: 2682520 (1954-06-01), Bump
patent: 3005793 (1961-10-01), Wagner
patent: 3361699 (1968-01-01), Mattimoe
patent: 3484479 (1969-12-01), Rinkler
patent: 3841955 (1974-10-01), Coaker
patent: 3894077 (1975-07-01), Horikawa

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