US4007233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber cement compositions
Assignee: Sumitomo Durez Co Ltd
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Filing: 1974-10-30
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Granted: 1977-02-08
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Expires: 1994-10-30
Abstract
Abstract Rubber cement compositions which consist of rubbers and multi- (three and more) functional phenol-aldehyde modified bifunctional phenol resins, which are made by first obtaining the bifunctional phenolic resin by condensing 1 mole of bifunctional phenol with 0.5 to 3.0 moles of aldehydes in the presence of an alkaline catalyst, and then co-condensing 0.05 to 2.5 moles of multifunctional (three and more) phenols against 1 mol of the bifunctional phenols in the above-mentioned resin in the presence of an acidic catalyst, said co-condensed resin having a number average molecular weight of 700 - 1900, a resin melting point of 80° -160° C, being curable and also being soluble in aromatic hydrocarbon solvents.
Inventors
- 👤 Yuji Kako
- 👤 Toyoji Kikuga
- 👤 Akira Toko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:20
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; C09; C09J; C09J109/00; C09J109/02; C08L; C08L2666/00; C08L2666/02; C08L2666/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
In a rubber cement composition comprising nitrile rubber and a phenolic resin derived from a mono-hydroxyphenol, the improvement wherein the phenolic resin consists essentially of phenolic resin produced by (a) condensing a bifunctional phenol and an aldehyde in a molar ratio of about 0.5 to 3 moles of aldehyde per mole of bifunctional phenol under alkaline conditions, and (b) reacting the resulting condensation product with a polyfunctional phenol having at least 3 reactive positions on the phenyl nucleus in a molar ratio of about 0.05 to 2.5 moles of polyfunctional phenol per mole of bifunctional phenol in said condensation product in the presence of a sufficient amount of acid to provide acid catalysis of the condensation of the aldehyde and the phenol, to produce a phenolic resin having a number average molecular weight of about 700 to 1,900 and a melting point of about 80° to 160° centigrade.
Claim 2
Dependent Claim
148 words
In a rubber cement composition comprising nitrile rubber and a phenolic resin derived from a mono-hydroxyphenol, the improvement wherein the phenolic resin consists essentially of phenolic resin produced by (a) condensing a bifunctional phenol and an aldehyde in a molar ratio of about 0.5 to 3 moles of aldehyde per mole of bifunctional phenol under alkaline conditions, and (b) reacting the resulting condensation product with a polyfunctional phenol having at least 3 reactive positions on the phenyl nucleus in a molar ratio of about 0.05 to 2.5 moles of polyfunctional phenol per mole of bifunctional phenol in said condensation product in the presence of a sufficient amount of acid to provide acid catalysis of the condensation of the aldehyde and the phenol, to produce a phenolic resin having a number average molecular weight of about 700 to 1,900 and a melting point of about 80° to 160° centigrade.
Claim 3
Dependent Claim
32 words
The composition of claim 1 wherein the components are present in a proportion of about 25 to about 150 parts by weight of phenolic resin to 100 parts by weight of rubber.
Claim 4
Dependent Claim
32 words
The composition of claim 1 wherein the components are present in a proportion of about 50 to about 100 parts by weight of phenolic resin to 100 parts by weight of rubber.
Claim 5
Dependent Claim
10 words
The composition of claim 1 wherein the aldehyde is formaldehyde.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein the polyfunctional phenol is phenol.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein the bifunctional phenol is para-tertiary butylphenol.
Claim 8
Dependent Claim
10 words
The composition of claim 1 wherein the aldehyde is acetaldehyde.
Claim 9
Dependent Claim
12 words
The composition of claim 7 wherein the polyfunctional phenol is bisphenol A.
Claim 10
Dependent Claim
12 words
The composition of claim 8 wherein the bifunctional phenol is para-octyl phenol.
Claim 11
Dependent Claim
32 words
The composition of claim 1 wherein the acid is selected from the group consisting of formic acid, oxalic acid, acetic acid, hydrochloric acid, sulfuric acid, benzene sulfonic acid, and para-toluene sulfonic acid.
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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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |