US4339554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride resin blends
Assignee: Lyondell Chemical Technology LP
•
Filing: 1980-12-18
•
Granted: 1982-07-13
•
Expires: 2000-12-18
Abstract
Abstract A polyvinyl chloride resin blend having a high heat distortion temperature, comprising a blend of 60-80 percent by weight of a polyvinyl chloride resin and 20-40 percent by weight of a copolymer of a vinyl aromatic monomer, such as styrene, and either 14-27 percent by weight of maleic anhydride or 10-18 percent by weight of an imide derivative of maleic anhydride.
Inventors
- 👤 Kenneth W. Doak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:05
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L35/00; C08L35/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A polyvinyl chloride resin blend consisting essentially of a blend of: (a) from 60-80 percent by weight of a polyvinyl chloride resin, and (b) from 20-40 percent by weight of a rubber-modified copolymer of (1) a vinyl aromatic monomer, (2) 14-27 percent by weight of maleic anhydride and (3) 5-30 percent of a rubber selected from the group consisting of block copolymer rubbers of styrene and butadiene and epichlorohydrin rubbers, said rubber modified copolymer being obtained by polymerizing components (1) and (2) presence of (3).
Claim 2
Dependent Claim
85 words
A polyvinyl chloride resin blend consisting essentially of a blend of: (a) from 60-80 percent by weight of a polyvinyl chloride resin, and (b) from 20-40 percent by weight of a rubber-modified copolymer of (1) a vinyl aromatic monomer, (2) 14-27 percent by weight of maleic anhydride and (3) 5-30 percent of a rubber selected from the group consisting of block copolymer rubbers of styrene and butadiene and epichlorohydrin rubbers, said rubber modified copolymer being obtained by polymerizing components (1) and (2) presence of (3).
Claim 3
Dependent Claim
89 words
A polyvinyl chloride resin blend consisting essentially of a blend of: (a) from 60-80 percent by weight of a polyvinyl chloride resin, and (b) from 20-40 percent by weight of a rubber-modified copolymer of (1) a vinyl aromatic monomer, (2) 10-18 percent by weight of an imide derivative of maleic anhydride and (3) 5-30 percent of a rubber selected from the group consisting of block copolymer rubbers of styrene and butadiene and epichlorohydrin rubbers, said rubber modified copolymer being obtained by polymerizing components (1) and (2) presence of (3).
Claim 4
Dependent Claim
89 words
A polyvinyl chloride resin blend consisting essentially of a blend of: (a) from 60-80 percent by weight of a polyvinyl chloride resin, and (b) from 20-40 percent by weight of a rubber-modified copolymer of (1) a vinyl aromatic monomer, (2) 10-18 percent by weight of an imide derivative of maleic anhydride and (3) 5-30 percent of a rubber selected from the group consisting of block copolymer rubbers of styrene and butadiene and epichlorohydrin rubbers, said rubber modified copolymer being obtained by polymerizing components (1) and (2) presence of (3).
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) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |