Patent US3963652A successfully refreshed from Google Patents.
US3963652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesion of rubber to reinforcing materials
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1974-03-27
•
Granted: 1976-06-15
•
Expires: 1994-03-27
Abstract
Abstract A vulcanizable rubber composition comprising a rubber component, a formaldehyde-donor and a formaldehyde-acceptor, the formaldehyde-acceptor being a co-condensate of formaldehyde with a mixture of resorcinol and a phenol other than resorcinol, or a mixture of a condensate of resorcinol with formaldehyde and a condensate of the phenol with formaldehyde, which is useful for achievement of the excellent adhesion of rubber to reinforcing materials simultaneously with vulcanization.
Inventors
- 👤 Syozo Tanimura
- 👤 Yutaka Terada
- 👤 Hiroshi Fukuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/10; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; C08L; C08L21/00; C08J2321/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31786; Y10T428/31797; Y10T428/31942
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A vulcanizable rubber composition containing a rubber component, a formaldehyde-donor selected from the group consisting of di- to hexa-methylolmelamines, completely or partially etherified or esterified derivatives thereof and hexamethylenetetramine and a formaldehyde-acceptor, wherein the formaldehyde-acceptor is a co-condensate of formaldehyde with a mixture of resorcinol and a phenol selected from the group consisting of m-cresol, p-cresol, tertbutylphenols and tert-octylphenols, the molar ratio of formaldehyde and the mixture of resorcinol and the phenol being 0.4-1.3 : 1, and the weight ratio of resorcinol and the phenol being from 95:5 to 50:50, or a mixture of a condensate of resorcinol with formaldehyde and a condensate of the phenol with formaldehyde, the molar ratio of resorcinol and formaldehyde in the condensate of resorcinol with formaldehyde being 0.4-1.0 : 1, and the molar ratio of formaldehyde and the phenol in the condensate of the phenol with formaldehyde being 0.5-1.4 : 1, and the weight ratio of the condensate of resorcinol with formaldehyde and the condensate of the phenol with formaldehyde being from 95:5 to 50:50
Claim 2
Dependent Claim
171 words
A vulcanizable rubber composition containing a rubber component, a formaldehyde-donor selected from the group consisting of di- to hexa-methylolmelamines, completely or partially etherified or esterified derivatives thereof and hexamethylenetetramine and a formaldehyde-acceptor, wherein the formaldehyde-acceptor is a co-condensate of formaldehyde with a mixture of resorcinol and a phenol selected from the group consisting of m-cresol, p-cresol, tertbutylphenols and tert-octylphenols, the molar ratio of formaldehyde and the mixture of resorcinol and the phenol being 0.4-1.3 : 1, and the weight ratio of resorcinol and the phenol being from 95:5 to 50:50, or a mixture of a condensate of resorcinol with formaldehyde and a condensate of the phenol with formaldehyde, the molar ratio of resorcinol and formaldehyde in the condensate of resorcinol with formaldehyde being 0.4-1.0 : 1, and the molar ratio of formaldehyde and the phenol in the condensate of the phenol with formaldehyde being 0.5-1.4 : 1, and the weight ratio of the condensate of resorcinol with formaldehyde and the condensate of the phenol with formaldehyde being from 95:5 to 50:50
Claim 3
Dependent Claim
30 words
The vulcanizable rubber composition according to claim 1, wherein the amount of the formaldehyde-acceptor is 1 to 10 parts by weight to 100 parts by weight of the rubber component.
Claim 4
Dependent Claim
13 words
The vulcanizable rubber composition according to claim 1, wherein the phenol is m-cresol.
Claim 5
Dependent Claim
13 words
The vulcanizable rubber composition according to claim 1, wherein the phenol is p-t-octylphenol.
Claim 6
Dependent Claim
26 words
The vulcanizable rubber composition according to claim 1, wherein the molar ratio of formaldehyde and the mixture of resorcinol and the phenol is 0.5-1.1 : 1
Claim 7
Dependent Claim
48 words
The vulcanizable rubber composition according to claim 1, wherein the molar ratio of resorcinol and formaldehyde in the condensate of resorcinol with formaldehyde is 0.5-0.8 : 1, and the molar ratio of formaldehyde and the phenol in the condensate of the phenol with formaldehyde is 0.6-1.2 : 1.
References Cited (Backward Citations)
CA564192A
Cited
US3342238A
Cited
GB1050836A
Cited
US3517722A
Cited
US3660202A
Cited
US3817890A
Cited
US3681168A
Cited
US3843484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |