US3789084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of styrene/acrylonitrile copolymers with block copolymers containing lactones and a resinous or rubbery polymer
Assignee: Phillips Petroleum Co
•
Filing: 1971-10-04
•
Granted: 1974-01-29
•
Expires: 1991-10-04
Abstract
Abstract The impact strength of styrene/acrylonitrile copolymers is greatly improved by blending therewith a conjugated diene block copolymer containing a lactone and a resinous or rubbery polymer.
Inventors
- 👤 C Childers
- 👤 E Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:07
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08L53/00; C08L67/00; C08L67/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
A composition according to claim 1 wherein said composition comprises from about 90 to 50 weight percent of said styrene/acrylonitrile copolymer, from about 5.6 to 20.2 weight perCent of said conjugated diene/lactone block copolymer, and from 1.7 to 50 weight percent of said rubbery polymer or said polycarbonate.
Claim 2
Dependent Claim
137 words
A composition according to claim 1 wherein said conjugated dien/lactone block copolymer can be represented by the formula A-B, wherein A represents a block segment comprising polymerized conjugated dienes, and B represents a block comprising polymerized lactones, wherein said A block represents from about 95 to 20 weight percent of the total weight of said block copolymer and comprises homopolymer prepared from conjugated dienes, copolymers prepared from 2 or more conjugated dienes, or copolymers prepared from conjugated dienes and monovinyl-substituted aromatic hydrocarbons, and when the A block comprises a copolymer of conjugated dienes and monovinyl-substituted aromatic hydrocarbons sufficient conjugated diene monomer is employed to provide a minimum of 10 weight percent conjugated diene based on the total weight of said block copolymer; wherein said B block comprises homopolymers of lactones, or copolymers of 2 or more lactones.
Claim 3
Dependent Claim
47 words
A composition according to claim 3 wherein said styrene/acylonitrile copolymer comprises from about 15 to 40 weight percent acrylonitrile and wherein said conjugated diene/lactone block copolymer comprises from about 10 to 50 weight percent polymerized lactone based on the total weight of said conjugated diene block copolymer.
Claim 4
Dependent Claim
25 words
A composition according to claim 4 wherein said conjugated diene is butadiene, wherein said monovinyl-substituted aromatic hydrocarbons is styrene and said lactone is epsilon -caprolactone.
Claim 5
Dependent Claim
24 words
A composition according to claim 1 comprising in addition a peroxy compound curing agent containing from about four to 40 carbon atoms per molecule.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 wherein said rubbery polymer is a conjugated diene homopolymer or copolymer.
Claim 7
Dependent Claim
18 words
A composition according to claim 7 wherein said homopolymer is butadiene and said polymer is a butadiene/styrene copolymer.
Claim 8
Dependent Claim
17 words
A composition according to claim 1 wherein said conjugated diene/lactone block copolymer is a styrene/butadiene/caprolactone block copolymer.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |