Cross-linked polyvinyl acetals

Details Cross-linked polyvinyl acetals Cross-linked polyvinyl acetals

2007-12-25

2007-12-25

Wu, David W. (Department: 1713)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S056000, C525S062000

Reexamination Certificate

active

10519133

ABSTRACT:
The invention relates to a cross-linked polyvinyl acetal which is characterized in that it can be obtained from at least one polyvinylacetal (1) which is obtained by reacting at least one polymer (A), which contains a) 1,0 to 99.9 wt. % structural units of formula (1), b.) 0 to 99.0 wt. % structural units of formula (2), c.) 0 to 70.0 wt. % structural formula (3), d.) 0.0001 to 30.0 wt. % structural units of formula (4) respectively in relation to the overall weight of the polymer (A), with at least one compound (B) of formula (5). Furthermore, the present invention relates to methods for the production of the polyvinyl acetal according to the invention as well as its use.

REFERENCES:
patent: 2332899 (1943-10-01), D Alelio
patent: 2882161 (1959-04-01), Dann et al.
patent: 3577374 (1971-05-01), Isaksen et al.
patent: 6808858 (2004-10-01), Fuss et al.
patent: 0 174 479 (1986-03-01), None
patent: 1 180 528 (2002-02-01), None
patent: 1 180 529 (2002-02-01), None
patent: WO 01/79305 (2001-10-01), None

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