Method for making block siloxane copolymers

Patent · Tue Sep 07 00:00:00 EDT 1982

OSTI ID:6949683

Butler, N; Jessop, E S; Kolb, J R

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
• Resource Relation: Patent File Date: Filed date 25 Feb 1981; Other Information: PAT-APPL-238235
• Country of Publication: United States
• Language: English

Related Subjects

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