US4187202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polymer resins of high impact resistance
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1976-07-28
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Granted: 1980-02-05
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Expires: 1996-07-28
Abstract
Abstract A process for preparing polymer resins of high impact resistance which comprises coagulating a latex of a rubbery polymer grafted or not with at least one ethylenic monomer in the presence of a suspension stabilizer and a coagulating agent to make a stable aqueous suspension of coagulated particles of said rubbery polymer, adding at least one ethylenic monomer to the aqueous suspension and subjecting the resultant mixture to suspension polymerization.
Inventors
- 👤 Masatsune Kondo
- 👤 Akira Tanoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:28
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A process for preparing polymer resins of high impact resistance which comprises coagulating a latex of a rubbery polymer selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, isoprene rubber, chloroprene rubber, acrylic rubber, ethylene-propylene-diene terpolymer and ethylene-vinyl acetate copolymer, said rubbery polymer being grafted or not with at least one ethylenic monomer in the presence of a suspension stabilizer and a coagulating agent to make a stable aqueous suspension of coagulated particles of said rubbery polymer, adding at least one ethylenic monomer to the aqueous suspension and subjecting the resultant mixture to suspension polymerization, said resins having a rubbery polymer content of 3 to 60% by weight.
Claim 2
Dependent Claim
113 words
A process for preparing polymer resins of high impact resistance which comprises coagulating a latex of a rubbery polymer selected from the group consisting of natural rubber, butadiene rubber, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, isoprene rubber, chloroprene rubber, acrylic rubber, ethylene-propylene-diene terpolymer and ethylene-vinyl acetate copolymer, said rubbery polymer being grafted or not with at least one ethylenic monomer in the presence of a suspension stabilizer and a coagulating agent to make a stable aqueous suspension of coagulated particles of said rubbery polymer, adding at least one ethylenic monomer to the aqueous suspension and subjecting the resultant mixture to suspension polymerization, said resins having a rubbery polymer content of 3 to 60% by weight.
Claim 3
Dependent Claim
30 words
The process according to claim 1, wherein the coagulating agent is used in an amount of 0.01 to 10 parts based on the weight of 100 parts of the latex.
Claim 4
Dependent Claim
33 words
The process according to claim 1, wherein the suspension stabilizer is used in an amount of 0.02 to 5 parts based on the weight of 100 parts of the monomers to be polymerized.
Claim 5
Dependent Claim
49 words
The process according to claim 1, wherein the ethylenic monomer is a member selected from the group consisting of styrenic monomers, acrylonitrile and its related compounds, acrylic acid and its esters, methacrylic acid and its esters, vinyl esters, vinyl and vinylidene halides, vinylketone, acrylamide, vinylpyrrolidone, maleic anhydride and maleimide.
Claim 6
Dependent Claim
29 words
The process according to claim 1, wherein the coagulating agent is a member selected from the group consisting of organic or inorganic acids, metal salts and high polymeric coagulants.
Claim 7
Dependent Claim
37 words
The process according to claim 1, wherein the suspension stabilizer is a member selected from the group consisting of fine powders of inorganic compounds hardly soluble in water and natural or synthetic water soluble high polymeric materials.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |