US4749747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a nonaqueous stable emulsion of rubber in polymerizable monomer, and the polymerization process and thermoplastic copolymer produced thereby
Assignee: Standard Oil Co
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Filing: 1987-08-28
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Granted: 1988-06-07
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Expires: 2007-08-28
Abstract
Abstract A process for the production of a nonaqueous stable emulsion feedstock comprising a rubber, a block copolymer having at least one component miscible with the rubber and at least one component miscible with the monomer, and at least two unsaturated organic monomers capable of free radical polymerization is disclosed. At least one of the monomers must be miscible with the rubber and the mixture of the monomers is substantially a nonsolvent for the rubber. The block copolymer maintains the rubber or rubber-rich particles in emulsified form within the mixture of monomers. In general, the process comprises (1) mixing the rubber, block copolymer and at least a portion of the rubber miscible monomers to form a first nonaqueous solution, (2) mixing the remaining monomers and the remaining portion of the rubber miscible monomers to form a second solution, and (3) combining the two solutions to form the nonaqueous stable emulsion feedstock. A process for polymerizing this feedback material and the polymerization product produced thereby is also disclosed.
Inventors
- 👤 Wen B. Shyu
- 👤 David A. Woodhead
- 👤 Vincent P. Quigley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:42
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/006; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08; C08F287/00; C08F291/00; C08F291/02; C08L51/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A rubber-modified transparent thermoplastic copolymer composition comprising a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride monomer, a C 1 to C 3 alkyl ester of methacrylic acid monomer, an acrylonitrile monomer, a rubber, and a block copolymer having at least one component miscible with said monomers and at least one component miscible with said rubber, wherein said rubber modified copolymer is prepared by polymerizing a single nonaqueous emulsion feedstock comprising each said monomer, said rubber and said block copolymer.
Claim 2
Dependent Claim
80 words
A rubber-modified transparent thermoplastic copolymer composition comprising a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride monomer, a C 1 to C 3 alkyl ester of methacrylic acid monomer, an acrylonitrile monomer, a rubber, and a block copolymer having at least one component miscible with said monomers and at least one component miscible with said rubber, wherein said rubber modified copolymer is prepared by polymerizing a single nonaqueous emulsion feedstock comprising each said monomer, said rubber and said block copolymer.
Claim 3
Dependent Claim
35 words
The thermoplastic copolymer composition of claim 1 wherein said C 1 to C 3 alkyl ester of methacrylic acid and said acrylonitrile are present in the range of about 50 to 80 parts by weight.
Claim 4
Dependent Claim
14 words
The thermoplastic composition of claim 1 wherein said block copolymer is styrene/butadiene or styrene/ethylene-butylene.
Claim 5
Dependent Claim
20 words
The thermoplastic composition of claim 1 wherein said rubber is selected from the group consisting of polybutadiene, ethylene/propylene and ethylene/propylene/diene.
Claim 6
Dependent Claim
23 words
The thermoplastic copolymer composition of claim 1 wherein said monoalkenyl aromatic monomer is selected from the group consisting of styrene and its derivatives.
Claim 7
Dependent Claim
29 words
The thermoplastic copolymer composition of claim 5 wherein monoalkenyl aromatic monomer is styrene and said styrene is present in the range of about 5 to 30 parts by weight.
Claim 8
Dependent Claim
28 words
The thermoplastic composition of claim 1 wherein said unsaturated dicarboxylic acid anhydride is selected from the group consisting of maleic anhydride, itaconic anhydride, citraconic anhydride, and aconitic anhydride.
Claim 9
Dependent Claim
22 words
The thermoplastic composition of claim 7 wherein said anhydride is present in the range of about 5 to 30 parts per weight.
Claim 10
Dependent Claim
33 words
The thermoplastic copolymer composition of claim 1 wherein said C 1 to C 3 alkyl ester of methacrylic acid is selected from the group consisting of methyl methacrylate, ethyl methacrylate and propyl methacrylate.
Claim 11
Dependent Claim
14 words
The rubber-modified thermoplastic copolymer composition of claim 1 wherein methacrylonitrile is substituted for acrylonitrile.
Claim 12
Dependent Claim
17 words
The rubber modified thermoplastic copolymer composition of claim 1 wherein said block copolymer is styrene/butadiene or styrene/ethylene-butylene.
Claim 13
Dependent Claim
29 words
The rubber-modified thermoplastic polymer composition of claim 1 wherein said block copolymer is a styrene/butadiene copolymer wherein at least about 25 weight parent of said block copolymer comprises styrene.
Claim 14
Dependent Claim
28 words
A rubber-modified thermoplastic polymer compositions of claim 1 wherein said rubber and said block copolymer are present in the range of about 5 to 25 parts by weight.
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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |