US3665057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing high impact resistance resins by a bulk-suspension two stage process
Assignee: Daicel Corp
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Filing: 1970-02-05
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Granted: 1972-05-23
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Expires: 1990-02-05
Abstract
Abstract A thermoplastic resin having a high impact resistance is made by subjecting a mixture or a solution of a first quantity of an elastomeric polymer in a monovinyl aromatic hydrocarbon monomer or a mixture of a monovinyl aromatic hydrocarbon monomer and a copolymerizable monovinyl monomer to a bulk-suspension two stage polymerization process. A second quantity of an elastomer consisting of an aqueous latex of butadiene rubber is added to the mixture or solution during the preliminary bulk polymerization step when the conversion of the monomer or monomer mixture to the polymer is about from 10 to 50 percent by weight.
Inventors
- 👤 Atsushi Tanaka
- 👤 Hiroomi Kobayashi
- 👤 Teizo Kudo
- 👤 Masatoshi Mikumo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:27
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F255/00; C08F255/02; C08F255/026; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
Improved method according to claim 1, in which the first quantity of the elastomeric polymer is from about 10 to 25 percent by weight of the total weight of the monomer or monomer mixture, in which the second quantity of the elastomer, calculated as the solids, is from about 5 to 30 percent by weight of the monomer or monomer mixture, and the combined amounts of the first and second quantities is from about 25 to 55 percent by weight of the monomer or monomer mixture.
Claim 2
Dependent Claim
24 words
Improved method according to claim 1, in which the monovinyl aromatic hydrocarbon is selected from the group consisting of styrene and nuclear substituted styrenes.
Claim 3
Dependent Claim
30 words
Improved method according to claim 1, in which the copolymerizable vinyl monomer is a monomer selected from the group consisting of acrylonitrile, Alpha -methyl styrene, methyl methacrylate and mixtures thereof.
Claim 4
Dependent Claim
31 words
Improved method according to claim 1, in which the elastomer polymer is selected from the group consisting of homopolymers and copolymers derived from butadiene, isoprene and chloroprene and ethylene-vinyl acetate copolymers.
Claim 5
Dependent Claim
30 words
Improved method according to claim 1, in which the aqueous latex of a butadiene rubber is selected from the group consisting of polybutadiene and butadiene-styrene copolymer prepared in emulsion polymerization.
Claim 6
Dependent Claim
25 words
Improved method according to claim 1, in which the average particle size of the elastomer particles in the latex is from 0.1 to 1.0 microns.
Claim 7
Dependent Claim
24 words
Improved method according to claim 1, in which the amount of the coagulant added is sufficient to break the emulsion state of the latex.
Claim 8
Dependent Claim
30 words
Improved method according to claim 8, in which the amount of the coagulant added is from about 0.5 to 2 percent by weight, based on the weight of the latex.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |