Polyvinyl acetals with improved adhesion

Details Polyvinyl acetals with improved adhesion Polyvinyl acetals with improved adhesion

2005-03-22

2005-03-22

Cheung, William K. (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...

C525S330300, C525S330600

Reexamination Certificate

active

06870009

ABSTRACT:
Low molecular weight polyvinyl acetals have a solution viscosity of from 2 to 12 mPas and a degree of polymerization Pwless than 200, and are obtained by hydrolyzing a vinyl ester polymer having a solution viscosity of from 1.0 to 1.6 mPas until the content of vinyl alcohol units is ≧50 mol %, to produce a polyvinyl alcohol whose solution viscosity is from 1.0 to 2.0 mPas, and then acetalizing the resultant polyvinyl alcohol. The products may be used as binders and films of increased adhesion to substrates.

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Abstract Corresponding To EP 319 614 [1989].
Abstract Corresponding To EP 319 613 [1989].
Abstract Corresponding To JP 63046279 [1988].
Abstract Corresponding To CH 271 648 [1952].
Abstract Corresponding To JP 09110930 [1997].
Derwent Abstract Corresponding To EP 634 447 [AN 1995-045145].
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