US4500666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition containing non-tackiness-imparting agent and conveyor belt having surface layer made of vulcanizate of said composition
Assignee: Bando Chemical Industries Ltd
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Filing: 1983-05-12
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Granted: 1985-02-19
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Expires: 2003-05-12
Abstract
Abstract A rubber composition comprising (1) 100 parts by weight of at least one organic rubber selected from natural rubber and organic synthetic rubbers or 100 parts by weight of a rubber mixture of 99% to 80% by weight of the organic rubber and 2 to 20% by weight of a silicone raw rubber having a molecular weight of 100,000 to 1,000,000 and (2) 0.5 to 50 parts by weight of at least one non-tackiness-imparting agent selected from fatty acid amides. The vulcanizate of said rubber composition is non-tacky and suitable for use as a surface layer for conveyor belts carrying highly tacky substances such as oil sands.
Inventors
- 👤 Noriaki Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08L; C08L21/00; C08L7/00; C08L77/00; C08L83/00; C08L83/04; C08L9/00; C08L9/02; C08L9/06; C08L2205/00; C08L2205/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
A rubber composition comprising: (1) 100 parts by weight of a rubber mixture of 98 to 80% by weight of at least one organic rubber selected from the group consisting of natural rubber and organic synthetic diene rubbers and 2 to 20% by weight ofa silicone raw rubber comprising an organo polysiloxane of the formula -R 2 SiO-, wherein R is alkyl, alkenyl, arlkyl, haloalkyl or cyanoalkyl; said organopolysiloxane having a molecular weight of 100,000 to 1,000,000, and (2) 0.5 to 50 parts by weight of at least one non-tackiness-imparting agent selected from the group consisting of fatty acid amides.
Claim 2
Dependent Claim
100 words
A rubber composition comprising: (1) 100 parts by weight of a rubber mixture of 98 to 80% by weight of at least one organic rubber selected from the group consisting of natural rubber and organic synthetic diene rubbers and 2 to 20% by weight ofa silicone raw rubber comprising an organo polysiloxane of the formula -R 2 SiO-, wherein R is alkyl, alkenyl, arlkyl, haloalkyl or cyanoalkyl; said organopolysiloxane having a molecular weight of 100,000 to 1,000,000, and (2) 0.5 to 50 parts by weight of at least one non-tackiness-imparting agent selected from the group consisting of fatty acid amides.
Claim 3
Dependent Claim
23 words
A rubber composition according to claim 1, wherein the fatty acid amides are higher fatty acid amides having 6 to 30 carbon atoms.
Claim 4
Dependent Claim
31 words
A rubber composition according to claim 1, wherein the non-tackiness-imparting agent is selected from the group consisting of stearic acid amide, oleic acid amide, palmitic acid amide and lauric acid amide.
Claim 5
Dependent Claim
21 words
A rubber composition according to claim 1, wherein the quantity of the non-tackiness-imparting agent is 0.5 to 20 parts by weight.
Claim 6
Dependent Claim
21 words
A rubber composition according to claim 3, wherein the quantity of the non-tackiness-imparting agent is 0.5 to 20 parts by weight.
Claim 7
Dependent Claim
21 words
A rubber composition according to claim 1, wherein the quantity of the non-tackiness-imparting agent is 1 to 10 parts by weight.
Claim 8
Dependent Claim
31 words
A rubber composition according to claim 1, wherein the organic rubber is selected from the group consisting of natural rubber, isoprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, butadiene rubber and chloroprene rubber.
Claim 9
Dependent Claim
27 words
A rubber composition according to claim 7, wherein the organic rubber is selected from the group consisting of natural rubber, isoprene rubber, styrene-butadiene rubber and acrylonitrile-butadiene rubber.
Claim 10
Dependent Claim
23 words
A rubber composition according to claim 7, wherein the organic rubber is an acrylonitrile-butadiene rubber containing 15 to 25% by weight of acrylonitrile.
Claim 11
Dependent Claim
15 words
A rubber composition according to claim 1, wherein R is a methyl or phenyl group.
Claim 12
Dependent Claim
29 words
A rubber composition according to claim 1, wherein the quantity of the silicone raw rubber is 5 to 15% by weight based on the weight of the rubber mixture.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |