Silicon-containing step ladder polymer and a process for produci

Details Silicon-containing step ladder polymer and a process for produci Silicon-containing step ladder polymer and a process for produci

1985-07-24

1986-04-29

Schofer, Joseph L.

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

Synthetic resins

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

5253265, 525386, C08F 840

Patent

active

045858349

ABSTRACT:
A silicon-containing step ladder polymer comprising a unit represented by the following general formula (I): ##STR1## a unit represented by the following general formula (II): ##STR2## and a unit represented by the following general formula (III): ##STR3## where R.sup.1 represents a hydrocarbon or fluorine-substituted hydrocarbon group, R.sup.2 represents hydrogen or a trialkyl siloxy group, and R.sup.3 and R.sup.4 which may be identical or different with each other represent individually hydrocarbon or fluorine-substituted hydrocarbon groups, the molar ratio of the unit (I) to the unit (II) is between 5:1-100:1 and the molar ratio of the unit (III) to the total amount of the unit (I)+unit (II) is between 1:5-1:100, as well as a process for producing such polymer.

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patent: 4412042 (1983-10-01), Matsuura et al.
patent: 4478990 (1984-10-01), Kohuo et al.

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