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US3930107A
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Pelletized unvulcanized rubbery polymer
Assignee: JSR Corp
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Filing: 1973-12-20
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Granted: 1975-12-30
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Expires: 1993-12-20
Abstract
Abstract Pelletized unvulcanized rubbery polymer comprising pellet cores of unvulcanized rubbery polymer and a coating layer formed thereon, said coating layer consisting of a 1,2-polybutadiene having a 1,2-addition unit content of not less than 70%, crystallinity of not less than 10%, and an intrinsic viscosity ( Eta ) (as measured in toluene at 30*C) of not less than 0.7 dl/g.
Inventors
- 👤 Yasuyuki Yaeda
- 👤 Shigeki Hayashi
- 👤 Kazuo Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:37
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08J2321/00; Y; Y10; Y10S; Y10S428/00; Y10S428/905; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
PELLETIZED UNVULCANIZED RUBBERY POLYMER COMPRISING PELLET CORS OF UNVULCANIZED RUBBER POLYMER AND A COATING LAYER FORMED THEREON, SAID COATING LAYER CONSISTING OF 1,2POLYBUTADIENE HAVING A 1,2-ADDITION UNIT CONTENT OF NOT LESS THAN 70%, CRYSTALLINITY OF NOT LESS THAN 15%, AND INTRINSIC VICOSITY (N), AS MEASURED IN TOLUENE AT 30*C, FOR NOT LESS THAN 0.7 DL/G.
Claim 2
Dependent Claim
55 words
PELLETIZED UNVULCANIZED RUBBERY POLYMER COMPRISING PELLET CORS OF UNVULCANIZED RUBBER POLYMER AND A COATING LAYER FORMED THEREON, SAID COATING LAYER CONSISTING OF 1,2POLYBUTADIENE HAVING A 1,2-ADDITION UNIT CONTENT OF NOT LESS THAN 70%, CRYSTALLINITY OF NOT LESS THAN 15%, AND INTRINSIC VICOSITY (N), AS MEASURED IN TOLUENE AT 30*C, FOR NOT LESS THAN 0.7 DL/G.
Claim 3
Dependent Claim
42 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein the unvulcanized rubbery polymer is at least a member selected from the group consisting of natural rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, polybutadiene rubber, polyisoprene rubber, polychloroprene rubber, butyl rubber, and ethylene-propylenediene terpolymer rubber.
Claim 4
Dependent Claim
18 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein the 1,2-addition unit content is not less than 85%.
Claim 5
Dependent Claim
16 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein the crystallinity is between 20 and 35%.
Claim 6
Dependent Claim
21 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein the intrinsic viscosity ( Nu ) is not less than 1.0 dl/g.
Claim 7
Dependent Claim
41 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein said 1,2-polybutadiene has a 1,2-addition unit content of not less than 85%, a crystallinity of not less than 15%, and an intrinsic viscosity ( Nu ) of not less than 1.0 dl/g.
Claim 8
Dependent Claim
47 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein at least one conventional compounding ingredient selected from the group consisting of reinforcing agents, fillers, extender oils, pigments, vulcanizing agents, vulcanization accelerators, vulcanization activators, antioxidants, perfumes, and softeners is added to the 1,2-polybutadiene or the unvulcanized rubbery polymer.
Claim 9
Dependent Claim
28 words
Pelletized unvulcanized polymer according to claim 1 wherein the pellets of unvulcanized rubbery polymer are in the form of pellets ranging in diameter from 0.1 to 30 mm.
Claim 10
Dependent Claim
21 words
Pelletized unvulcanized rubbery polymer according to claim 1 wherein the coating layer has a thickness of 3 to 200 Mu .
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |