SILOXANE MODIFIED NOVOLAKS, THEIR PRODUCTION AND THEIR USE FOR THE PRODUCTION OF FRICTION LININGS

SILOXANE MODIFIED NOVOLAKS, THEIR PRODUCTION AND THEIR USE FOR THE PRODUCTION OF FRICTION LININGS. A polysiloxane containing a novolak residue corresponding to the formula wherein each A is a novolak residue, a C1-C8 alkyl, C6-C12 aryl or C7-C12 alkyl aryl group, each R is a C1-C8 alkyl, C6-C18 cycl...

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Bibliographische Detailangaben
Hauptverfasser:	SCHMIDT, MANFRED, FRIES, HERMANN, ESCH, ERICH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BLASTING BRAKES CHEMISTRY CLUTCHES COMPOSITIONS BASED THEREON COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL PROCESSES OF COMPOUNDING HEATING LIGHTING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL WEAPONS WORKING-UP
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Zusammenfassung:	SILOXANE MODIFIED NOVOLAKS, THEIR PRODUCTION AND THEIR USE FOR THE PRODUCTION OF FRICTION LININGS. A polysiloxane containing a novolak residue corresponding to the formula wherein each A is a novolak residue, a C1-C8 alkyl, C6-C12 aryl or C7-C12 alkyl aryl group, each R is a C1-C8 alkyl, C6-C18 cycloalkyl, C6-C12 aryl or C7-C12 alkyl aryl group, and n is a number of from 3 to 100 provided that at least one A is a novolak residue, can be produced by reacting a respective substituted polysiloxane with a phenol-formaldehyde and/or cresolformaldehyd novolak resin in presence of an acid transesterification catalyst at temperatures of from 110 to 180.degree.C. The described products can be used for the production of friction linings. Le A 19 372