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US3966670A Expired / Lapsed US ⏱️ 0.0 years remaining

Friction particle for brake lining

Assignee: Occidental Chemical Corp
•
Filing: 1974-12-23
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Granted: 1976-06-29
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Expires: 1994-12-23
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Abstract

Abstract A friction particle, useful in applications where cashew nut shell oil friction particles have been used, may be prepared by the reaction at a temperature from about 225 DEG to about 400 DEG Fahrenheit of a non-oxyalkylated resole with resin selected from the group consisting of an oxyalkylated resole, an alkylated resole, an alkylated novolac, an oxyalkylated novolac, and mixtures thereof until it is insoluble, infusible, and does not soften slightly under mechanical force at temperatures below about 400 DEG Fahrenheit, and has substantially no cohesive or bonding strength.

Inventors

  • 👤 Frank S. Grazen
  • 👤 Melvin L. Buike
  • 👤 Frank M. Bryzinsky

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 12:40
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J2361/00; C08J2361/04; C08J2361/06

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 186 words
A friction particle consisting essentially of the non-catalyzed product of the reaction at about 225° to about 400° Fahrenheit of about 95 to about 60 percent by weight of a non-hydroxyalkylated, alkylated hydroxy aromatic hydrocarbon aldehyde resole containing substantially no etherified aromatic hydroxyl groups with about 5 to about 40 percent by weight of a hydroxyalkylated hydroxy aromatic hydrocarbon-aldehyde novolac until the product is substantially insoluble in acetone, infusible, and does not soften slightly under mechanical force at a temperature below about 400° Fahrenheit and has substantially no cohesive or bonding strength, wherein the alkylated groups of said alkylated resole are selected from the groups consisting of: a. alkyl groups of 1 to 60 carbon atoms. b. cycloalkyl groups of 5 to 12 atoms. c. alkyl, aryl and cycloalkyl ketonic groups wherein the hydrocarbon portion is as defined in (a) and (b). d. alkyl, aryl and cycloalkyl carboxylic groups wherein the hydrocarbon portion is as defined in (a) and (b). e. aryl groups of 6 to 24 carbon atoms, and f. aryl substituted alkyl wherein the aryl is phenyl, lower alkyl-substituted phenyl or hydroxy substituted phenyl.
Claim 2
Dependent Claim 186 words
A friction particle consisting essentially of the non-catalyzed product of the reaction at about 225° to about 400° Fahrenheit of about 95 to about 60 percent by weight of a non-hydroxyalkylated, alkylated hydroxy aromatic hydrocarbon aldehyde resole containing substantially no etherified aromatic hydroxyl groups with about 5 to about 40 percent by weight of a hydroxyalkylated hydroxy aromatic hydrocarbon-aldehyde novolac until the product is substantially insoluble in acetone, infusible, and does not soften slightly under mechanical force at a temperature below about 400° Fahrenheit and has substantially no cohesive or bonding strength, wherein the alkylated groups of said alkylated resole are selected from the groups consisting of: a. alkyl groups of 1 to 60 carbon atoms. b. cycloalkyl groups of 5 to 12 atoms. c. alkyl, aryl and cycloalkyl ketonic groups wherein the hydrocarbon portion is as defined in (a) and (b). d. alkyl, aryl and cycloalkyl carboxylic groups wherein the hydrocarbon portion is as defined in (a) and (b). e. aryl groups of 6 to 24 carbon atoms, and f. aryl substituted alkyl wherein the aryl is phenyl, lower alkyl-substituted phenyl or hydroxy substituted phenyl.
Claim 3
Dependent Claim 23 words
The particle of claim 1 wherein said resole in the particle is the condensation product of phenol and formaldehyde in an alkaline medium.
Claim 4
Dependent Claim 24 words
The particle of claim 1 wherein the said novolac in the particle is the condensation product of phenol and formaldehyde in an acid medium.
Claim 5
Dependent Claim 14 words
The composition comprising the friction particle of claim 1 and a resin binder therefor.
Claim 6
Dependent Claim 21 words
A brake lining comprising the cured product of the friction particle of claim 1, a resin binder, and an inorganic filler.
Claim 7
Dependent Claim 46 words
A brake lining comprising the cured product of about 30 to 60 weight percent asbestos fiber, up to 40 weight percent other inorganic fillers and abrasives, about 5 to 15 weight percent of the particle of claim 1, and about 15 to 30 weight percent binder.

References Cited (Backward Citations)

US2985614A Cited
US3207652A Cited
US3410718A Cited
US3658751A Cited
US3709849A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-06-29 1979-12-29 1980-06-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-06-29 1983-12-29 1984-06-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-06-29 1987-12-29 1988-06-29 $7700.00 Window Closed / Lapsed

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