Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1989-10-16
1991-09-17
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524861, 528 15, 528 16, 528 18, 528 19, 528 31, 528 33, 528 34, 528 37, C08L 8300
Patent
active
050496115
ABSTRACT:
The silacyclobutane functional polydiorganosiloxane copolymers of the invention have the following structure: ##STR1## wherein M is selected from ##STR2## wherein R.sup.a, R.sup.b, R.sup.c, R.sup.d, R.sup.e, and R.sup.f are independently monovalent radicals selected from the group consisting of hydrogen, hydrocarbon, or substituted hydrocarbon; m and x are integers of from 0 or more; n is equal to 1; and p is an integer greater than 0; with the proviso that there is at least one silacyclobutane group in the copolymer. The copolymer can be made by reacting a hydroxyl endblocked polydiorganosiloxane with either a difunctional chain extending silacyclobutane or with a monofunctional chain stopper, or a mixture of chain extender and chain stopper. The copolymer can be made into curable compositions by use of suitable catalyst.
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Khim Geterotsiki. Soedin. (Chemistry of Heterocyclic Compounds), Nametkin, Vdovin. and Babich, (1966) (4) 630.
Baney Ronald H.
Bilgrien Carl J.
Burns Gary T.
Fiedler Lawrence D.
Lee Chi-Long
Dow Corning Corporation
Elliott Edward C.
Marquis Melvyn I.
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