Method of making silethynyl polymers

Details Method of making silethynyl polymers Method of making silethynyl polymers

1993-02-22

1993-09-21

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526285, 526291, 528 12, 528 14, 528 32, 528 43, 528 34, C08G 7760

Patent

active

052470393

ABSTRACT:
A method of making silethynyl polymers having units of the general formula--(R.sub.2 SiC.tbd.C)-- wherein each R independently denotes a hydrogen atom, an alkyl, aryl or alkenyl group or a substituted alkyl, aryl or alkenyl group having up to 18 carbon atoms comprises adding a lithium salt of one or more diethynylsilanes of the general formula R.sub.2 Si(C.tbd.CH).sub.2 to one or more dihalosilanes of the general formula R.sub.2 SiX.sub.2 where X is a halogen atom and allowing the components to react. Copolymers with alternating units can be made. Linear polymers are made preferentially. Limiting the use of solvent increases the percentage of linear polymers produced.

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patent: 4866153 (1989-09-01), Bortolin
Odian, G., "Principles of Polymerization", 3rd Ed., 467 (1991), Wiley (New York).
Miller, M. L., "The Structures of Polymers", 2nd Printing, 437, 458-9 (1968) Reinhold (New York).
66448q-Chemical Abstract, Voronkov et al. USSR, 1973 43(6), pp. 1408-1409.
67034u-Chemical Abstract, Preparation of ethynylsilanes, J. Organometal Chem. 1970, 21(1), pp. 83-90.

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