Film for composite security disks with self-adhesiveness

Details Film for composite security disks with self-adhesiveness Film for composite security disks with self-adhesiveness

2007-07-31

2007-07-31

Nakarani, D. S. (Department: 1773)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C428S436000, C524S311000

Reexamination Certificate

active

10499121

ABSTRACT:
Plasticized films suitable as an intermediate layer in laminated safety glass and based on partially acetalized polyvinyl alcohols, in particular PVB, have not only the required excellent adhesion to glass but also undesired self-adhesion (susceptibility to blocking).Amounts of from 0.001 to 0.1% by weight of a pentaerythritol ester are proposed for use as an additive which reduces self-adhesion. This additive does not alter the adhesion of the film to glass.The invention is used for producing films for the production of laminated safety glass. The need to cool the films for stacking or wind-up is substantially eliminated.

REFERENCES:
patent: 4537828 (1985-08-01), Gomez
patent: 19938159 (2001-02-01), None
patent: 0133848 (1985-03-01), None

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