US3607983A
Expired / Lapsed
US
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Process for the production of high impact strength graft polymers
Assignee: Columbian Carbon Co
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Filing: 1969-05-28
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Granted: 1971-09-21
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Expires: 1989-05-28
Abstract
Abstract Processes are described for the preparation of synthetic resins by polymerizing a mixture of vinyl aromatic and vinyl cyanide monomers in the presence of a small particle size butadienestyrene copolymer latex. Extruded sheets of this graft polymer product exhibit high impact strengths and possess scuff resistant matte finish surfaces which make them well suited for use in the manufacture of luggage.
Inventors
- 👤 George L Rushton
- 👤 Bobby Ray Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:45
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
The process of claim 1, wherein said butadiene-styrene copolymer contains from about 20 to about 26 weight percent bound styrene and has an average particle size of from about 0.05 to about 0.09 microns and a gel content of less than about 15 percent.
Claim 2
Dependent Claim
30 words
The process of claim 1, wherein said polymerization is conducted in the presence of from about 0.004 to about 0.028 equivalents of mercaptan per kilogram of said monomers and rubber.
Claim 3
Dependent Claim
30 words
The process of claim 3, wherein said polymerization is conducted in the presence of from about 0.014 to about 0.026 equivalents of mercaptan per kilogram of said monomers and rubber.
Claim 4
Dependent Claim
39 words
The process of claim 1, wherein said anionic surfactant is an alkali metal soap of rosin or a higher fatty acid containing from about 0.02 to about 0.08 equivalents of alkali metal per kilogram of said monomers and rubber.
Claim 5
Dependent Claim
28 words
The process of claim 5, wherein said alkali metal soap contains from about 0.03 to about 0.05 equivalents of alkali metal per kilogram of said monomers and rubber.
Claim 6
Dependent Claim
17 words
The process of claim 1, wherein said polymerization is initiated by an alkali metal or ammonium persulfate.
Claim 7
Dependent Claim
35 words
The process of claim 1, wherein said polymerization is conducted at a temperature of from about 48* C. to about 52* C. until at least about 95 weight percent of said monomer mixture has reacted.
Claim 8
Dependent Claim
197 words
Process for the production of a high impact strength low-gloss synthetic resin comprising polymerizing a mixture of styrene and acrylonitrile monomers containing from about 40 to about 46 mol percent acrylonitrile at a temperature of from about 48* C. to about 52* C. in the presence of a. an alkali metal or ammonium persulfate initiator, b. an aqueous emulsion of from about 0.25 to about 0.3 parts by weight per part of said monomer mixture of a butadiene-styrene copolymer rubber containing from about 20 to about 26 weight percent bound styrene and having an average particle size of from about 0.05 to about 0.09 microns, a gel content of less than about 15 percent and a swelling index in benzene of greater than about 40, c. from about 0.014 to about 0.026 equivalents of a tertiary higher alkyl mercaptan polymerization regulator per kilogram of said monomers and rubber and d. an alkali metal soap of a rosin or higher fatty acid containing from about 0.03 to about 0.05 equivalents of alkali metal per kilogram of said monomers and rubber, and maintaining said polymerization temperature until at least about 85 weight percent of said monomer mixture has reacted.
Claim 9
Dependent Claim
28 words
The process of claim 9, wherein said polymerization is conducted in the presence of at least about 0.004 equivalents of peroxide per kilogram of said monomers and rubber.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |