US4714734A
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Rubber compounds
Assignee: Bridgestone Corp
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Filing: 1986-02-25
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Granted: 1987-12-22
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Expires: 2006-02-25
Abstract
Abstract Rubber compounds comprising a specific type of polyorganosiloxane of the following formula <IMAGE> in which R and R' independently represent a hydrocarbon substituent and n is an integer of not smaller than 3 provided that at least 6 mole % of the substituents R and R' consists of a hydrocarbon group having Small's molecular attraction constant not smaller than 350. Carbon black is added to the polyorganosiloxane whereby various physical properties are improved including breaking strength, water and hot water resistances. The rubber compound may further comprise at least one organic rubber other than the above polyorganosiloxane.
Inventors
- 👤 Takatsugu Hashimoto
- 👤 Akihiro Maehara
- 👤 Seisuke Tomita
- 👤 Yuichi Funahashi
- 👤 Junichiro Watanabe
- 👤 Kazuo Sugiura
- 👤 Hironori Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:36
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
95 words
A rubber compound comprising 100 parts by weight of a polyorganosiloxane of the following general formula ##STR8## wherein R and R' are independently selected from the group consisting of an aromatic ring substituent, an alkyl substituent, and a halogenated alkyl substituent; n is an integer of not smaller than 3; and wherein at least 6 mole percent of said substituents are an aromatic ring substituent having a Small's molecular attraction constant of not smaller than 700; and 2to 200 parts by weight of carbon black having an average particle size not larger than 1000 angstroms.
Claim 2
Dependent Claim
95 words
A rubber compound comprising 100 parts by weight of a polyorganosiloxane of the following general formula ##STR8## wherein R and R' are independently selected from the group consisting of an aromatic ring substituent, an alkyl substituent, and a halogenated alkyl substituent; n is an integer of not smaller than 3; and wherein at least 6 mole percent of said substituents are an aromatic ring substituent having a Small's molecular attraction constant of not smaller than 700; and 2to 200 parts by weight of carbon black having an average particle size not larger than 1000 angstroms.
Claim 3
Dependent Claim
27 words
A rubber compound according to claim 1, wherein 10 to 70 mole percent of said substituents have a Small's molecular attraction constant of not smaller than 700.
Claim 4
Dependent Claim
27 words
A rubber compound according to claim 2, wherein 20 to 50 mole percent of said substituents have a Small's molecular attraction constant of not smaller than 700.
Claim 5
Dependent Claim
15 words
A rubber compound according to claim 1, wherein said aromatic substituent contains a benzene ring.
Claim 6
Dependent Claim
27 words
A rubber compound according to claim 1, wherein R and R' are independently selected from the group consisting of an aromatic ring substituent and a methyl group.
Claim 7
Dependent Claim
28 words
A rubber compound according to claim 1, wherein n is not less than 15 to less than 3000 when said polyorganosiloxane is used as a liquid rubber compound.
Claim 8
Dependent Claim
24 words
A rubber compound according to claim 1, wherein n is not less than 3000 when said polyorganosiloxane is used as a millable silicone compound.
Claim 9
Dependent Claim
15 words
A rubber compound according to claim 1, wherein said polyorganosiloxane has a substantially linear structure.
Claim 10
Dependent Claim
21 words
A rubber compound according to claim 1, wherein said compound is cured and crosslinked by the action of a vulcanizing agent.
Claim 11
Dependent Claim
157 words
A rubber compound comprising 100 parts by weight of a mixture of (1) a polyorganoxiloxane of the following general formula ##STR9## wherein R and R' are independently selected from the group consisting of an aromatic ring substituent, an alkyl substituent, and a halogenated alkyl substituent; n is an integer of not smaller than 3; and wherein at least 6 mole percent of said substituents are an aromatic ring substituent having a Small's molecular attraction constant smaller than 700; and (2) at least one organic rubber selected from the group consisting of natural rubber, isoprene rubber, styrene-butadiene rubber, butadiene rubber, ethylen-alpha-olefin rubbers, acrylonitrile-butadiene rubber, butyl rubber, halogenated butyl rubber, fluoro rubbers, acryl rubber, epichlorohydrin rubber, ethylene-vinyl acetate copolymers and ethylene-acrylate rubber, said polyorganosiloxane and said organic rubber being mixed in a ratio of from 95:5 to 5:95 by weight; and 2to 200 parts by weight of carbon black having an average particle size not larger than 1000 angstroms.
Claim 12
Dependent Claim
157 words
A rubber compound comprising 100 parts by weight of a mixture of (1) a polyorganoxiloxane of the following general formula ##STR9## wherein R and R' are independently selected from the group consisting of an aromatic ring substituent, an alkyl substituent, and a halogenated alkyl substituent; n is an integer of not smaller than 3; and wherein at least 6 mole percent of said substituents are an aromatic ring substituent having a Small's molecular attraction constant smaller than 700; and (2) at least one organic rubber selected from the group consisting of natural rubber, isoprene rubber, styrene-butadiene rubber, butadiene rubber, ethylen-alpha-olefin rubbers, acrylonitrile-butadiene rubber, butyl rubber, halogenated butyl rubber, fluoro rubbers, acryl rubber, epichlorohydrin rubber, ethylene-vinyl acetate copolymers and ethylene-acrylate rubber, said polyorganosiloxane and said organic rubber being mixed in a ratio of from 95:5 to 5:95 by weight; and 2to 200 parts by weight of carbon black having an average particle size not larger than 1000 angstroms.
Claim 13
Dependent Claim
20 words
A rubber compound according to claim 10, wherein said organic rubber has a Mooney viscosity of from 20 to 150.
Claim 14
Dependent Claim
32 words
A rubber compound according to claim 10, wherein said polyorganosiloxane and said organic rubber are mixed in a ratio of from 50:50 to 30:70 by weight whereby hot water resistance is improved.
Claim 15
Dependent Claim
22 words
A rubber compound according to claim 10, wherein said rubber compound is cured and crosslinked by the action of a vulcanizing agent.
Claim 16
Dependent Claim
25 words
A rubber compound according to claim 10, wherein said polyorganosiloxane and said organic rubber are mixed in a ratio of 80:20 to 20:80 by weight.
Claim 17
Dependent Claim
16 words
A rubber compound according to claim 6, wherein n is over 100 and less than 2000.
Claim 18
Dependent Claim
14 words
A rubber compound according to claim 7, wherein n is from 4000 to 10,000.
Claim 19
Dependent Claim
20 words
A rubber compound according to claim 11, wherein said organic rubber has a Mooney viscosity of from 40 to 80.
Claim 20
Dependent Claim
22 words
A rubber compound according to claim 1, wherein said carbon black is in the amount of 20 to 100 parts by weight.
Claim 21
Dependent Claim
22 words
A rubber compound according to claim 1, wherein said carbon black has an average particle size of not larger than 600 angstroms.
Claim 22
Dependent Claim
77 words
A rubber compound according to claim 1, wherein said aromatic ring substituent is selected from the group consisting of phenyl, m-methylphenyl, p-methylphenyl, p-ethylphenyl, p-isopropylphenyl, m-sec-butylphenyl, m-tert-butylphenyl, p-sec-butylphenyl, p-tert-butylphenyl, m-phenylphenyl, p-phenylphenyl, p-benzylphenyl, beta-naphthyl, alpha-naphthyl, 2,4-dimethylphenyl, 2,5-dimethylphenyl, 3,4-dimethylphenyl, 3,5-dimethylphenyl, o-methoxyphenyl, m-methoxyphenyl, p-methoxyphenyl, m-phenoxyphenyl, p-phenoxyphenyl, 4-methoxy-3-methylphenyl, 6-methoxy-3-methylphenyl, 3,4-dimethoxyphenyl, 2-methyl-4-methoxy-5-isopropylphenyl, phenoxymethyl, o-fluorophenol, m-fluorophenyl, p-fluorophenyl, o-chlorophenyl, p-chlorophenyl, 2,3-dichlorophenyl, 2,4-dichlorophenyl, 2,5-dichlorophenyl, 2,6-dichlorophenyl, 3,4-dichlorophenyl, 3,5-dichlorophenyl, 2,3,4-trichlorophenyl, 2,3,5-trichlorophenyl, 2,3,6-trichlorophenyl, 2,4,5-trichlorophenyl, 2,3,4,5-tetrachlorophenyl, 2,3,4,6-tetrachlorophenyl, 2,3,5,6-tetrachlorophenyl, pentachlorophenyl, o-bromophenyl, m-bromophenyl, p-bromophenyl, p-cyanophenyl, p-aminophenyl, p-hydroxyphenyl, m-cyanophenyl, m-aminophenyl, 2-phenylethyl, and 2-phenylpropyl.
Claim 23
Dependent Claim
101 words
A rubber compound according to claim 1, comprising: 100 parts by weight of a polyorganoxiloxane of the following general formula ##STR10## wherein R and R' are independently selected from the group consisting of a phenyl substituent and a methyl substituent; n is an integer from 4000 to 10,000; and wherein said phenyl substituent is in the amount of from 20 to 50 mole % of said substituents, said phenyl substituent having a Small's molecular attraction constant of not smaller than 700; and 20to 100 parts by weight of carbon black having an average particle size of not larger than 600 angstroms.
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) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |