Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1976-06-09
1977-08-30
Ives, P. C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428 65, 428293, 428361, 428390, 428391, 428262, 428450, 428451, 428496, 428448, 428452, 428514, 428539, 427340, 427372R, 427290, 156278, 428444, 428445, B32B 1506, B32B 1508, B32B 1512
Patent
active
040456080
ABSTRACT:
Porous friction facing materials containing cellulose fibers are coated with an impregnant of ethyl silicate to provide automatic transmission clutch plate and band linings of improved frictional properties, durability, wear and heat resistance, without use of asbestos. A sheet of paper-like fibrous material may be first impregnated with a phenolic resin binder which is cured to form a first coating and then impregnated with a hydrolyzed solution of ethyl silicate in a solvent. The material is further heated to drive off the solvent and cure the ethyl silicate to form a second outer coating having a higher coefficient of friction than the first coating. The silicate impregnated lining is then bonded to the steel plate or band. Alternatively, the resin impregnated lining material may be first bonded to the metal plate and then the entire plate assembly is impregnated with the ethyl silicate solution and cured.
REFERENCES:
patent: 2849346 (1958-08-01), Almen et al.
patent: 2855329 (1958-10-01), Morton
patent: 2901467 (1959-08-01), Croco
patent: 3316138 (1967-04-01), Taylor
patent: 3927241 (1975-12-01), Augustin
Ives P. C.
Weingram Edward R.
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