US4146697A
Expired / Lapsed
US
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Poly(organosiloxy) telechelic styrene polymer process
Assignee: General Electric Co
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Filing: 1978-05-19
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Granted: 1979-03-27
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Expires: 1998-05-19
Abstract
Abstract A poly(organosiloxy) telechelic styrene polymer polymerization process comprising contacting an olefin, a free radical polymerization initiator, and a poly(organosiloxyaryl) polysulfide is described. The poly(organosiloxy) terminated styrene polymers can be end capped and/or coupled with other polymeric materials. The styrene polymers can be molded, calendered, or extruded as films, sheets, fibers, laminates or other useful articles of manufacture.
Inventors
- 👤 Dwain M. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:27
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
A poly(organosiloxy) telechelic styrene polymer polymerization process comprising contacting an olefin, a free radical polymerization initiator, and a poly(organosiloxy)organopolysulfide.
Claim 2
Dependent Claim
19 words
A poly(organosiloxy) telechelic styrene polymer polymerization process comprising contacting an olefin, a free radical polymerization initiator, and a poly(organosiloxy)organopolysulfide.
Claim 3
Dependent Claim
98 words
The claim 1 process wherein the olefin is a vinyl aromatic monomeric reactant, the initiator is selected from peroxides, persulfates, hydroperoxides, peresters, azo compounds or photoinitiators, and the polysulfide is of the formula ##STR6## wherein independently each x is an integer at least equal to 1, n is an integer at least equal to 2, R is an alkyl, cycloalkyl, or aryl radical including combinations thereof, and R' is at least a divalent arene radical having at least one organosiloxy ##STR7## radical directly bonded to an aromatic ring carbon atom via the oxy radical of the siloxy group.
Claim 4
Dependent Claim
50 words
The claim 2 process wherein the vinyl monomer is of the formula ##STR8## wherein independently R is hydrogen, lower alkyl or halogen, Z is a member selected from the class consisting of vinyl, hydrogen, chlorine and lower alkyl, and p is a whole number equal to from 0 to 5.
Claim 5
Dependent Claim
32 words
The claim 2 process wherein R is a C 1-5 alkyl radical, R' is a C 6-10 aryl or arylalkyl radical, x is equal to 1 and in is equal to 2.
Claim 6
Dependent Claim
14 words
The claim 4 process wherein the free radical polymerization initiator is an azo compound.
Claim 7
Dependent Claim
21 words
The claim 5 process wherein the vinyl monomer is styrene, the polysulfide is bis(4-trimethylsiloxyphenyl) disulfide and the azo compound is 2,2'-azo-bis-isobutyronitrile.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |