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Method for making block siloxane copolymers

Patent ·
OSTI ID:6949683
; ;
A method for synthesizing block polysiloxane copolymers is presented. Diorganoscyclosiloxanes and an end-blocking compound are interacted in the presence of a ring opening polymerization catalyst, producing a blocked prepolymer. The prepolymer is then interacted with a silanediol, resulting in condensation polymerization of the prepolymers. A second end-blocking compound is subsequently introduced to end-cap the polymers and copolymers formed from the condensation polymerization.
Assignee:
Department Of Energy
Patent Number(s):
US 4348504
OSTI ID:
6949683
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360401* -- Polymers & Plastics-- Preparation & Fabrication-- (-1987)
CHANNELING
CHEMICAL REACTIONS
COPOLYMERS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
SILOXANES
SYNTHESIS