US4393167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blends containing polymer of β-hydroxybutyric acid and chlorine or nitrile group containing polymer
Assignee: Syngenta Ltd
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Filing: 1981-11-10
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Granted: 1983-07-12
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Expires: 2001-11-10
Abstract
Abstract Polymer blends containing (i) 0.2-95% by weight of a high molecular weight beta -hydroxybutyric acid homo- or copolymer and (ii) a polymer containing at least 25% by weight of chlorine or nitrile groups, such as chlorinated polyethylene, polyvinyl chloride, or a high acrylonitrile resin. In small quantities the beta -hydroxybutyric acid polymer acts as a processing aid for the chlorine or nitrile containing polymer. In larger quantities the properties of the beta -hydroxybutyric acid polymer or the chlorine or nitrile containing polymer are improved.
Inventors
- 👤 Paul A. Holmes
- 👤 Frank M. Willmouth
- 👤 Alan B. Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C12P7/625; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08L; C08L67/00; C08L67/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
60 words
A polymer blend comprising (i) 0.2 to 95% by weight of a β-hydroxybutyric acid polymer of molecular weight above 50,000 and containing 100 to 50 mole % of β-hydroxybutyric acid residues and correspondingly 0-50 mole % of β-hydroxyvaleric acid residues in the polymer chain, and (ii) an organic polymer containing at least 25% by weight of chlorine and/or nitrile groups.
Claim 2
Dependent Claim
60 words
A polymer blend comprising (i) 0.2 to 95% by weight of a β-hydroxybutyric acid polymer of molecular weight above 50,000 and containing 100 to 50 mole % of β-hydroxybutyric acid residues and correspondingly 0-50 mole % of β-hydroxyvaleric acid residues in the polymer chain, and (ii) an organic polymer containing at least 25% by weight of chlorine and/or nitrile groups.
Claim 3
Dependent Claim
47 words
A polymer blend according to claim 1 wherein said organic polymer is a polymer containing at least 50% by weight of units derived from vinyl chloride, vinylidene chloride, and/or acrylonitrile and 0 to 50% by weight of units derived from at least one other ethylenically unsaturated monomer.
Claim 4
Dependent Claim
57 words
A polymer blend according to claim 2 wherein said organic polymer is a graft copolymer of (i) 99.5 to 50% by weight of a monomer mixture containing at least 50% by weight of acrylonitrile and 0 to 50% by weight of at least one comonomer on (ii) 0.5 to 50% by weight of a butadiene/acrylonitrile copolymer trunk.
Claim 5
Dependent Claim
18 words
A polymer blend according to claim 1 wherein said organic polymer is a chlorinated, or chlorosulphonated, hydrocarbon polymer.
Claim 6
Dependent Claim
17 words
A polymer blend according to claim 4 wherein said organic polymer is a chlorinated or chlorosulphonated polyolefin.
Claim 7
Dependent Claim
17 words
A polymer blend according to claim 5 wherein said organic polymer is a chlorinated or chlorosulphonated polyethylene.
Claim 8
Dependent Claim
15 words
A polymer blend according to claim 1 wherein said organic polymer is a chlorinated polyether.
Claim 9
Dependent Claim
24 words
A polymer blend according to any one of claims 4 to 7 wherein said organic polymer has a glass transition temperature below 10° C.
Claim 10
Dependent Claim
17 words
A polymer blend according to claim 8 containing 10 to 50% by weight of said organic polymer.
Claim 11
Dependent Claim
18 words
A polymer blend according to claim 2 containing less than 50% by weight of the β-hydroxybutyric acid polymer.
Claim 12
Dependent Claim
24 words
A polymer blend according to claim 10 wherein the β-hydroxybutyric acid polymer is a copolymer containing 1 to 40 mole % of comonomer units.
Claim 13
Dependent Claim
29 words
A polymer blend according to claim 2 wherein said organic polymer is a polymer of vinyl chloride containing at least 80% by weight of units derived from vinyl chloride.
Claim 14
Dependent Claim
18 words
A polymer blend according to claim 12 containing 10 to 30% by weight of the β-hydroxybutyric acid polymer.
Claim 15
Dependent Claim
18 words
A polymer blend according to claim 1 wherein the β-hydroxybutyric acid polymer has a molecular weight above 100,000.
Claim 16
Dependent Claim
22 words
A polymer blend according to claim 13 in the form of a shaped article having a thickness of less than 2 mm.
Claim 17
Dependent Claim
35 words
A method of making a polymer blend according to claim 1 comprising blending the organic polymer with a solution of the β-hydroxybutyric acid polymer in a volatile solvent and then removing said solvent by volatilisation.
Claim 18
Dependent Claim
34 words
A method of making a polymer blend according to claim 1 comprising forming a slurry of the organic polymer, the β-hydroxybutyric acid polymer and a volatile liquid and then removing said liquid by volatilisation.
Claim 19
Dependent Claim
22 words
A method according to claim 16 or claim 17 wherein the mixture is granulated before, during, or after, volatilisation of the liquid.
Claim 20
Dependent Claim
33 words
A method of making a polymer blend according to claim 12 comprising polymerising a monomeric material containing at least 80% by weight of vinyl chloride in the presence of the β-hydroxybutyric acid polymer.
Claim 21
Dependent Claim
31 words
A method of making shaped articles comprising fabricating a polymer blend according to claim 1 at a temperature above the melting point of the β-hydroxybutyric acid polymer but below 220° C.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |