US3873490A
Expired / Lapsed
US
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Friction particle for brake lining
Assignee: Occidental Chemical Corp
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Filing: 1972-12-27
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Granted: 1975-03-25
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Expires: 1992-12-27
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 to about 400 degrees 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 degrees 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
2026-11-04 11:01
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08G; C08G8/00; C08G8/04; C08G8/08; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/34; C08L; C08L101/00; C08L61/00; C08L61/04; C08L61/06; C08J2361/00; C08J2361/04; C08J2361/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A FRICTION PARTICLE CONSISTING ESSENTIALLY OF THE NONCATALYZED PRODUCT OF THE REACTION AT ABOUT 225 TO ABOUT 400 DEGREES FAHREHEIT OF AT LEAST ABOUT 30 PERCENT BY WEIGHT OF A NON-HYDROXYALKYLATED HYDROXY AROMATIC HYDROCARBON ALDEHYDE RESOLE CONTAINING SUBSTANTIALLY NO ETHERIFIED AROMATIC HYDROXYL GROUPS WITH AT LEAST ABOUT 5 PERCENT BY WEIGHT OF A NON-HYDROXYALKYLATED HYDROXY AROMATIC HYDROCARBONALDEHYDE NOVOLAC UNTIL THE PRODUCT IS SUBSTANTIALLY INSOLUBLE IN ACETONE, INFUSIBLE, AND DOES NOT SOFTEN SLIGHTLY UNDER MECHANICAL FORCE AT A TEMPERATURE BELOW ABOUT 400 DEGREES FAHRENHEIT AND HAS SUBSTANTIALLY NO COHESIVE OR BONDING STRENGTH.
Claim 2
Dependent Claim
91 words
A FRICTION PARTICLE CONSISTING ESSENTIALLY OF THE NONCATALYZED PRODUCT OF THE REACTION AT ABOUT 225 TO ABOUT 400 DEGREES FAHREHEIT OF AT LEAST ABOUT 30 PERCENT BY WEIGHT OF A NON-HYDROXYALKYLATED HYDROXY AROMATIC HYDROCARBON ALDEHYDE RESOLE CONTAINING SUBSTANTIALLY NO ETHERIFIED AROMATIC HYDROXYL GROUPS WITH AT LEAST ABOUT 5 PERCENT BY WEIGHT OF A NON-HYDROXYALKYLATED HYDROXY AROMATIC HYDROCARBONALDEHYDE NOVOLAC UNTIL THE PRODUCT IS SUBSTANTIALLY INSOLUBLE IN ACETONE, INFUSIBLE, AND DOES NOT SOFTEN SLIGHTLY UNDER MECHANICAL FORCE AT A TEMPERATURE BELOW ABOUT 400 DEGREES FAHRENHEIT AND HAS SUBSTANTIALLY NO COHESIVE OR BONDING STRENGTH.
Claim 3
Dependent Claim
25 words
The particle of claim 1 wherein the first said resole in the particle is the condensation product of phenol and formaldehyde in an alkaline medium.
Claim 4
Dependent Claim
26 words
The particle of claim 1 wherein the said hydroxyalkylated resole in the particle is the hydroxyalkylated product of a phenol with an aldehyde in alkaline medium.
Claim 5
Dependent Claim
46 words
The friction particle of claim 1 which comprises the reaction product of about 5 to about 40 percent by weight of an hydroxylakylated resole and about 95 to about 60 percent by weight of a mixture of a non-hydroxyalkylated, non-alkylated resole and a non-hydroxyalkylated, alkylated novolac.
Claim 6
Dependent Claim
46 words
The friction particles of claim 1 which comprises the reaction product of about 5 to about 40 percent by weight of an hydroxyalkylated resole and about 95 to about 60 percent by weight of a mixture of a non-hydroxyalkylated, non-alkylated novolac and a non-hydroxyalkylated, non-alkylated resole.
Claim 7
Dependent Claim
51 words
The friction particle of claim 1 which comprises the reaction product of about 5 to about 50 percent by weight of a non-hydroxyalklylated, alkylated resole, about 5 to about 30 percent by weight of non-hydroxyalkylated, alkylated novolac, and about 25 to about 90 percent by weight of a non-hydroxyalkylated, non-alkylated resole.
Claim 8
Dependent Claim
41 words
The friction particle of claim 1 wherein said particle comprises the product of reaction of said non-hydroxyalkylated hydroxy aromatic hydrocarbon aldehyde resole with a mixture of said non-hydroxy-alkylated hydroxy aromatic hydrocarbon aldehyde novalac and a hydroxy-alkylated hydroxy aromatic hydrocarbon aldehyde resole.
Claim 9
Dependent Claim
39 words
The friction particle of claim 1 wherein said particle comprises the product of reaction of the said non-hydroxyalkylated hydroxy aromatic hydrocarbon-aldehyde resole with a mixture of said non-hydroxy-alkylated hydroxy aromatic hydrocarbon-aldehyde novolac and an alkylated hydroxy aromatic hydrocarbon-aldehyde resole.
Claim 10
Dependent Claim
21 words
A brake lining comprising the cured product of a friction particle of claim 1 a resin binder and an inorganic filler.
Claim 11
Dependent Claim
50 words
A brake lining comprising the cured product of about 30 to 60 weight percent asbestos fiber, up to about 40 weight percent of other inorganic fillers and abrasives, about 5 to 15 weight percent of the friction particle of claim 1 and about 15 to 30 weight percent of binder.
Claim 12
Dependent Claim
46 words
The friction particle of claim 1 which comprises the reaction product of about 5 to about 40 percent by weight of an hydroxyalkylated novolac and about 95 to about 60 percent by weight of a mixture of a non-hydroxyalkylated, non-alkylated resole and a non-hydroxyalkylated, alkylated novolac.
Claim 13
Dependent Claim
46 words
The friction particle of claim 1 which comprises the reaction product of about 5 to about 40 percent by weight of an hydroxyalkylated novolac and about 95 to about 60 percent by weight of a mixture of a non-hydroxyalkylated, non-alkylated resole and a non-hydroxyalkylated, non-alkylated novolac.
Claim 14
Dependent Claim
38 words
The friction particle of claim 1 which comprises the reaction product of 70 to about 90 percent by weight of a non-hydroxyalkylated, alkylated resole and about 30 to about 10 percent by weight of a non-hydroxyalkylated alkylated novolac.
Claim 15
Dependent Claim
50 words
A brake lining comprising the cured product of about 30 to 60 weight percent asbestos fiber, up to about 40 weight percent of other inorganic fillers and abrasives, about 5 to 15 weight percent of the friction particle of claim 13, and about 15 to 30 weight percent of binder.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |