Abrasive means, use of alkalimetal fluoroaluminates or...

B - Operations – Transporting – 24 – D

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B24D 3/00 (2006.01) C01F 7/54 (2006.01)

Patent

CA 2601019

The invention relates to an abrasive means with abrasive-active fillers. The abrasive means is comprised, in general, of a support, abrasive grit and of a binder system. In order to improve the abrasive action and the serviceable life of the abrasive means, the binding agent system contains synthetic alkali metal fluoroaluminates and/or alkaline earth metal fluoroaluminates, in particular, alkali metal tetrafluoroaluminate, preferably potassium tetrafluoroaluminate, together with at least one additional abrasive-active filler. The invention also relates to the use of alkali metal fluoroaluminates and/or alkaline earth metal fluoroaluminates, preferably potassium tetrafluoroaluminate and/or dipotassium pentafluoroaluminate for stabilizing polymers against change in color by the action of heat. The invention further relates to a mixture consisting of potassium tetrafluoroaluminate and dipotassium pentafluoroaluminate and of other abrasive-active fillers in a weight ratio of 4:2 to 2:4.

La présente invention concerne un agent abrasif comprenant des matières de charge abrasives. L'agent abrasif comprend de manière générale une couche sous-jacente, des grains abrasifs et un système de liant. Pour améliorer l'abrasion et la longévité de l'agent abrasif, le système de liant contient selon l'invention des fluoroaluminates de métal alcalin et/ou de métal alcalino-terreux, en particulier du tétrafluoroaluminate de métal alcalin, de préférence du tétrafluoroaluminate de potassium, ainsi qu'au moins une autre matière de charge abrasive.

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