US4100226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indene-chlorobutyl rubber copolymers
Assignee: Standard Oil Co
•
Filing: 1976-12-23
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Granted: 1978-07-11
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Expires: 1996-12-23
Abstract
Abstract Graft polymers of indene onto chlorobutyl rubber which have good impact resistance and high heat-distortion temperatures and blends of these graft polymers with commercially available thermoplastic resins are described.
Inventors
- 👤 George S. Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:10
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/08; C08F255/10; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
The graft polymer composition resulting from the polymerization of (A) from 60 to 95% by weight of indene in the presence of from 5 to 40% by weight of (B) a chlorinated rubbery copolymer of from 95% to 99% by weight of isobutylene and from 1 to 5% by weight of isoprene.
Claim 2
Dependent Claim
52 words
The graft polymer composition resulting from the polymerization of (A) from 60 to 95% by weight of indene in the presence of from 5 to 40% by weight of (B) a chlorinated rubbery copolymer of from 95% to 99% by weight of isobutylene and from 1 to 5% by weight of isoprene.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein (B) contains from 0.1 to 5% by weight of chlorine based on the weight of the rubber.
Claim 4
Dependent Claim
38 words
The process comprising polymerizing with a Lewis acid catalyst (A) from 60 to 95% by weight of indene in the presence of from 5 to 40% by weight of (B) a chlorinated rubbery copolymer of isobutylene and isoprene.
Claim 5
Dependent Claim
38 words
The process comprising polymerizing with a Lewis acid catalyst (A) from 60 to 95% by weight of indene in the presence of from 5 to 40% by weight of (B) a chlorinated rubbery copolymer of isobutylene and isoprene.
Claim 6
Dependent Claim
16 words
The process of claim 3 carried out in an organic solvent and in an inert atmosphere.
Claim 7
Dependent Claim
54 words
The process of claim 4 wherein the Lewis acid catalyst is a member selected from the group consisting of AlR x Cl 3-x wherein R is CH 3 , C 2 H 5 , nC 3 H 7 or i-C 3 H 7 , and x is 0-3, TiCl 4 or BF 3 .
Claim 8
Dependent Claim
20 words
The process of claim 5 carried out at a temperature in the range of from -50° C to -80° C.
Claim 9
Dependent Claim
17 words
The process of claim 6 wherein the organic solvent is a mixture of methylene chloride and pentane.
Claim 10
Dependent Claim
28 words
The process of claim 7 wherein (B) is a copolymer of from 95 to 99% by weight of isobutylene and from 1 to 5% by weight of isoprene.
Claim 11
Dependent Claim
23 words
The process of claim 8 wherein (B) contains from 0.1 to 5% by weight of chlorine based on the weight of the rubber.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |