US4294732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber mounting compositions
Assignee: Bridgestone Corp
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Filing: 1980-08-14
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Granted: 1981-10-13
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Expires: 2000-08-14
Abstract
Abstract Rubber compositions having excellent vibration isolating properties at a high hardness are produced by compounding 100 parts by weight of at least one of natural rubbers, diene rubbers and diene copolymeric rubbers or a rubber blend of these rubbers and a halogenated butyl rubber, 0.5-35 parts by weight of an oil modified phenol resin, a modified ratio of which is 20% or more, and 2-30 parts by weight based on said resin, of a hardening agent for the phenol resin and hardening the resulting mixture. The use of such rubber compositions is possible to make a rubber mounting to be a small size.
Inventors
- 👤 Tomio Ohyachi
- 👤 Koichi Irako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:22
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
Rubber mounting compositions having excellent vibration isolating properties at a relatively high hardness obtained by compounding 100 parts by weight of at least one of natural rubber, diene rubbers and diene copolymeric rubbers or a rubber blend of these rubbers and a halogenated butyl rubber, 0.5-35 parts by weight of an oil modified phenol resin selected from the group consisting of tall oil modified phenol resin and cashew oil modified phenol resin, a modified ratio of said tall oil being 30% or more, and 2-30 parts by weight based on said resin, of a hardening agent for the phenol resin and hardening the resulting mixture.
Claim 2
Dependent Claim
105 words
Rubber mounting compositions having excellent vibration isolating properties at a relatively high hardness obtained by compounding 100 parts by weight of at least one of natural rubber, diene rubbers and diene copolymeric rubbers or a rubber blend of these rubbers and a halogenated butyl rubber, 0.5-35 parts by weight of an oil modified phenol resin selected from the group consisting of tall oil modified phenol resin and cashew oil modified phenol resin, a modified ratio of said tall oil being 30% or more, and 2-30 parts by weight based on said resin, of a hardening agent for the phenol resin and hardening the resulting mixture.
Claim 3
Dependent Claim
17 words
Rubber mounting compositions as claimed in claim 1, wherein the halogenated butyl rubber is brominated butyl rubber.
Claim 4
Dependent Claim
34 words
Rubber mounting compositions as claimed in claim 1, wherein the halogenated butyl rubber and at least one of natural rubber, diene rubber and diene copolymeric rubbers are mixed in a weight ratio of 20/80-80/20.
Claim 5
Dependent Claim
39 words
Rubber mounting compositions as claimed in claim 1, wherein the oil modified phenol resin is a mixture of an unmodified phenol resin and said oil modified phenol resins, an average modified ratio of said mixture being 30% or more.
Claim 6
Dependent Claim
23 words
Rubber mounting compositions as claimed in claim 1, wherein the modified ratio of the cashew oil modified phenol resin is more than 40%.
Claim 7
Dependent Claim
14 words
Rubber mounting compositions as claimed in claim 1, wherein the hardening agent is hexamethylenetetramine.
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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |