US3965055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free curing rubber composition
Assignee: Uniroyal Chemical Co Inc
•
Filing: 1974-02-14
•
Granted: 1976-06-22
•
Expires: 1994-02-14
Abstract
Abstract A vulcanizable rubber is modified by the addition of a resin at a temperature above the melting point of said resin. Shaped articles are formed from the resulting blend and cured without restraining pressure at a temperature below the melting point of said resin. The resin portion is present in said articles in the form of particles having a cross sectional dimension (D) not greater than 1/2 micron and a length (L) to cross sectional dimension (D) ratio of 2 or greater.
Inventors
- 👤 Daniel Shichman
- 👤 Sung Whee Hong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:41
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A composition of matter comprising a blend of vulcanizable material in admixture with between about 2-10% by weight of a fiber forming, semi-crystalline, thermoplastic resin which possesses a melting point of 250°F. or greater, said resin being dispersed in said vulcanizable material in the form of particles having a cross sectional dimension (D) not greater than one-half micron and a length (L) to (D) ratio of 2 or greater.
Claim 2
Dependent Claim
69 words
A composition of matter comprising a blend of vulcanizable material in admixture with between about 2-10% by weight of a fiber forming, semi-crystalline, thermoplastic resin which possesses a melting point of 250°F. or greater, said resin being dispersed in said vulcanizable material in the form of particles having a cross sectional dimension (D) not greater than one-half micron and a length (L) to (D) ratio of 2 or greater.
Claim 3
Dependent Claim
46 words
The composition of matter defined in claim 1 wherein said vulcanizable material is selected from the group consisting of (a) diene polymers, (b) copolymer rubbers, (c) natural rubber, (d) depolymerized rubber and (e) interpolymers of at least 2 alpha monoolefins and at least one copolymerizable diene.
Claim 4
Dependent Claim
116 words
The composition of matter defined in claim 1 wherein said resin is selected from the group consisting of (a) polyolefins having 3-5 carbon atoms, (b) intra-and extra-linear polyamides, (c) polyester condensate products of dihydric alcohols and organo-dibasic acids, (d) ionomers prepared by neutralizing with metal ions from Group I (a) and (b), Group II (a) and (b) or transition metals of the periodic table, at least 30% of the acid groups of a copolymer of units derived from an alpha olefin of the formula R--CH=CH 2 , wherein R is a hydrogen of alkyl group having 1-8 carbon atoms and from 1.0 to 25 mole percent of units derived from an alpha-beta ethylenically unsaturated carboxylic acid.
Claim 5
Dependent Claim
88 words
The composition of matter defined in claim 3 wherein said vulcanizable material is selected from the group consisting of polybutadiene, polychloroprene, polyisoprene, copolymers of isobutylene and between about 0.25 and 10% of isoprene, balata, Hevea rubber and rubbery interpolymers of at least 2 alpha monoolefins having the formula CH 2 =CHR in which R is hydrogen or a saturated alkyl hydrocarbon radical having from 1-8 carbon atoms, and at least one copolymerizable diene selected from the group consisting of dicyclopentadiene, methylcyclopentadiene dimer, 1-4 hexadiene, 11-ethyl-1, 11-tridecadiene-1, 9-octadiene-1, 5-cyclooctadiene.
Claim 6
Dependent Claim
52 words
The composition of matter defined in claim 4 wherein said resin is selected from the group consisting of polypropylene, poly 4-methylpentene-1, polyethylene terephthalate, a copolymer of 75-99% by weight of acrylic or methyacrylic acid wherein at least 30% of the acid groups have been neutralized with sodium, zinc or calcium metal ions.
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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |