Patent US2363580A successfully refreshed from Google Patents.
US3884994A
Expired / Lapsed
US
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Graft copolymers of lactone polyesters
Assignee: Union Carbide Corp
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Filing: 1974-02-08
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Granted: 1975-05-20
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Expires: 1994-02-08
Abstract
Abstract Various ethylenically unsaturated monomers can be graft copolymerized onto lactone polyesters, such as, homopolymers of Epsilon -caprolactone or copolymers of Epsilon -caprolactone and Epsilon -alkyl- Epsilon -caprolactones at temperatures between 90* and 150* C. The resultant graft copolymers can be used as plasticizers for polyvinyl chloride resins.
Inventors
- 👤 Frank E Critchfield
- 👤 Joseph V Koleske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:19
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/02; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L51/00; C08L51/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
POLYBLEND OF POLYVINYL CHLORIDE AND ABOUT 10 TO ABOUT 100 PARTS OF GRAFT COPOLYMER, PER HUNDRED OF POLYVINYL CHLORIDE, SAID GRAFT COPOLYMER COMPRISING: A. LACTONE POLYESTERS HAVING A REDUCED VISCOSITY OF ABOUT 0.2 TO 2.0 DL./GM., A MOLECULAR WEIGHT OF ABOUT 5,000 TO 150,000 AND REPEATING UNITS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
51 words
POLYBLEND OF POLYVINYL CHLORIDE AND ABOUT 10 TO ABOUT 100 PARTS OF GRAFT COPOLYMER, PER HUNDRED OF POLYVINYL CHLORIDE, SAID GRAFT COPOLYMER COMPRISING: A. LACTONE POLYESTERS HAVING A REDUCED VISCOSITY OF ABOUT 0.2 TO 2.0 DL./GM., A MOLECULAR WEIGHT OF ABOUT 5,000 TO 150,000 AND REPEATING UNITS HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
22 words
Polyblend claimed in claim 1 wherein the lactone polyester (a) is poly( epsilon -caprolactone) and the monomer (b) is an alkyl methacrylate.
Claim 4
Dependent Claim
13 words
Polyblend claimed in claim 2 wherein the alkyl methacrylate monomer is methyl methacrylate.
Claim 5
Dependent Claim
21 words
Polyblend claimed in claim 1 wherein the lactone polyester (a) is a copolymer of epsilon -caprolactone and epsilon -methyl- epsilon -caprolactone.
Claim 6
Dependent Claim
12 words
Polyblend claimed in claim 4 wherein the monomer (b) is methyl methacrylate.
Claim 7
Dependent Claim
12 words
Polyblend claimed in claim 1 wherein the monomer (b) is acrylic acid.
Claim 8
Dependent Claim
12 words
Polyblend claimed in claim 1 wherein the monomer (b) is methacrylic acid.
Claim 9
Dependent Claim
12 words
Polyblend claimed in claim 4 wherein the monomer (b) is acrylic acid.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |