US4268657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction element containing phenol-formaldehyde-alkylphenol binder
Assignee: CARDOLITE Corp A CORP OF NEW JERSEY
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Filing: 1979-12-10
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Granted: 1981-05-19
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Expires: 1999-12-10
Abstract
Abstract Improved friction elements suited for use for example in an automotive or similar brake or in a clutch are provided by employing therein as a binder the reaction product of phenol, formaldehyde, and monoalkylphenol having from 4 to about 20 carbon atoms in the alkyl group. The mole ratio range of phenol:alkylphenol:formaldehyde is about 2:1-5:1-7 and the number of moles of phenol and alkylphenol combined exceeds the number of moles of formaldehyde. An improved method of making friction elements is also provided which uses such binder.
Inventors
- 👤 Anthony P. Manzara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:22
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; C08K; C08K3/00; C08K3/01; C08K3/013
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
In a friction element of the type which is composed of cured organic thermosettable binder having filler dispersed and bonded therein; the improvement comprising employing as said binder a curable mixture comprising a reaction product of: (a) phenol (b) formaldehyde; and (c) monalkyl phenol having from 4 to about 20 carbon atoms in the alkyl group, the mole ratio range of phenol:alkyl phenol:formaldehyde being about 2:1-5:1-7 and the number of moles of phenol and alkylphenol combined exceeding the number of moles of formaldehyde.
Claim 2
Dependent Claim
83 words
In a friction element of the type which is composed of cured organic thermosettable binder having filler dispersed and bonded therein; the improvement comprising employing as said binder a curable mixture comprising a reaction product of: (a) phenol (b) formaldehyde; and (c) monalkyl phenol having from 4 to about 20 carbon atoms in the alkyl group, the mole ratio range of phenol:alkyl phenol:formaldehyde being about 2:1-5:1-7 and the number of moles of phenol and alkylphenol combined exceeding the number of moles of formaldehyde.
Claim 3
Dependent Claim
11 words
The friction element of claim 1 wherein said alkylphenol is nonylphenol.
Claim 4
Dependent Claim
15 words
The friction element of claim 1 wherein the mole ratio of phenol:alkyl phenol:formaldehyde is 2:1:2.
Claim 5
Dependent Claim
15 words
The friction element of claim 1 wherein the mole ratio of phenol:alkyl phenol:formaldehyde is 2:1.14:2.
Claim 6
Dependent Claim
90 words
In a method of preparing a friction element by mixing liquid curable organic thermosettable binder with filler, forming the mixture into a desired shape, and curing the binder; the improvement comprising employing as said liquid binder a curable mixture comprising a reaction product of: (a) phenol; (b) formaldehyde; and (c) alkyl phenol having from 4 to 20 carbon atoms in the alkyl group, the mole ratio range of phenol:alkyl phenol:formaldehyde being about 2:1-5:1-7 and the number of moles of phenol and alkylphenol combined exceeding the number of moles of formaldehyde.
Claim 7
Dependent Claim
90 words
In a method of preparing a friction element by mixing liquid curable organic thermosettable binder with filler, forming the mixture into a desired shape, and curing the binder; the improvement comprising employing as said liquid binder a curable mixture comprising a reaction product of: (a) phenol; (b) formaldehyde; and (c) alkyl phenol having from 4 to 20 carbon atoms in the alkyl group, the mole ratio range of phenol:alkyl phenol:formaldehyde being about 2:1-5:1-7 and the number of moles of phenol and alkylphenol combined exceeding the number of moles of formaldehyde.
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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |