US4465807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of reinforced rubber vulcanizates and use thereof
Assignee: Hoechst AG
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Filing: 1983-08-30
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Granted: 1984-08-14
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Expires: 2003-08-30
Abstract
Abstract A process for the preparation of reinforced vulcanizates which process comprises vulcanizing a mixture comprising rubber, a novolak and at least one reactive melamine resin obtained by reaction of one mol of melamine with 0.5 to 6 mols of aldehyde, said melamine resin being present in an amount of from 0.5 to 120% by weight, based on the weight of the novolak resin, and the phenolic component of said novolak resin being selected from the group consisting of phenol, polynuclear polyphenols, alkylphenols, a combination of alkylphenols with phenol, and a combination of at least one of said phenols with a further phenol selected from the group consisting of resorcinol, phenylphenol and polyalkylphenols. The invention also includes rubber articles prepared from a product of such a process.
Inventors
- 👤 Arnold Giller
- 👤 Joachim Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:36
CPC Classifications
C; C08; C08L; C08L21/00; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
A process for the preparation of reinforced vulcanizates which comprises vulcanizing a mixture comprising rubber, sulfur as a vulcanization agent in conjunction with a conventional accelerator and a novolak as a reinforcing material in conjunction with at least one reactive melamine resin obtained by reaction of one mol of melamine with 0.5 to 6 mols of aldehyde, said melamine resin being present in an amount of from 1 to 80% by weight based on the weight of the novolak resin, the novolak resin being present in the final composition in an amount of from 1 to 30% by weight based on the rubber, and the phenolic component of said novolak resin being selected from the group consisting of phenol, bisphenols, alkylphenols and, a combination of alkylphenols with phenol having a content of at most 70 mol % of alkyl phenol, and the rubber being derived from components free of carbonyl groups.
Claim 2
Dependent Claim
151 words
A process for the preparation of reinforced vulcanizates which comprises vulcanizing a mixture comprising rubber, sulfur as a vulcanization agent in conjunction with a conventional accelerator and a novolak as a reinforcing material in conjunction with at least one reactive melamine resin obtained by reaction of one mol of melamine with 0.5 to 6 mols of aldehyde, said melamine resin being present in an amount of from 1 to 80% by weight based on the weight of the novolak resin, the novolak resin being present in the final composition in an amount of from 1 to 30% by weight based on the rubber, and the phenolic component of said novolak resin being selected from the group consisting of phenol, bisphenols, alkylphenols and, a combination of alkylphenols with phenol having a content of at most 70 mol % of alkyl phenol, and the rubber being derived from components free of carbonyl groups.
Claim 3
Dependent Claim
40 words
A process as claimed in claim 1 wherein the vulcanisation is performed in the presence of a melamine resin the methylol groups of which are at least partially etherified with a monohydric alcohol having from 1 to 12 carbon atoms.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1 wherein said melamine resin is present in an amount of from 2 to 50% by weight based on the weight of the novolak resin.
Claim 5
Dependent Claim
48 words
A process as claimed in claim 1 wherein the vulcanisation is performed in the presence of at least one compound selected from the group consisting of mono- or di- carboxylic organic acids having 2 to 20 carbon atoms and polyesters having an acid number of at least 20.
Claim 6
Dependent Claim
29 words
A process as claimed in claim 4, wherein the amount of the organic acid component is between 0.1 and 5% by weight, based on the weight of the rubber.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 1, which comprises vulcanisation of a rubber composition into which the novolak and the melamine resin have been incorporated at a temperature between 80° and 120° C.
Claim 8
Dependent Claim
42 words
A process as claimed in claim 1, which comprises vulcanisation of a rubber composition containing at least one phenol novolak selected from the group consisting of phenol-p-tert.-butylphenol novolaks, phenoloctylphenol novolaks, phenol-nonylphenol novolaks and novolaks prepared from phenol and cashew nut shell oil.
Claim 9
Dependent Claim
32 words
A process as claimed in claim 1, which comprises vulcanisation of a composition wherein the amount of novolak is between 3 to 20% by weight, based on the weight of the rubber.
Claim 10
Dependent Claim
17 words
An industrial rubber article prepared from a product obtained according to the process claimed in claim 1.
Claim 11
Dependent Claim
17 words
A rubber article as claimed in claim 9 in the form of a tire for motor vehicles.
References Cited (Backward Citations)
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US3287440A
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US3277209A
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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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |