Method of treating a surface, surface-modified abrasive particles, and resin-bond abrasive articles
Assignee3M Innovative Properties Company
InventorsHae-Seung H. Lee, Melissa C. Schillo-Armstrong, Babu N. Gaddam
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Abstract
An adhesion promoter comprises a reaction product of: a) a polyepoxide; b) an aminosilane represented by the formula HNR1R2. R1 and R2 independently represent —Z—SiL3. Each Z independently represents a divalent linking group having from 1 to 12 carbon atoms, and each L independently represents a hydrolyzable group; and c) an isocyanatosilane represented by the formula O═C═N—Z—SiL3, wherein Z and L are as previously defined. The adhesion promoter may be used to treat a surface of a substrate such as an abrasive particle, which may be included in a resin-bond abrasive article.
Claims20
A method of treating a surface of an abrasive particle having chemically-bound surface hydroxyl groups, the method comprising:
- providing an adhesion promoter comprising at least one ring-opened adduct of:
- a) a polyepoxide having at least two epoxy groups;
- b) an aminosilane represented by the formula
- HNR1R2
- wherein R1 and R2 independently represent —Z—SiL3, wherein each Z independently represents a divalent linking group having from 1 to 12 carbon atoms, and wherein each L independently represents a hydrolyzable group, and
- c) an isocyanatosilane represented by the formula
- O═C═N—Z—SiL3
- wherein Z and L are as previously defined;
- and
- contacting the adhesion promoter with the surface of the abrasive particle.
An abrasive particle having an outer surface with an adhesion-modifying layer covalently bound thereto, wherein the adhesion-modifying layer comprises a reaction product of an adhesion promoter and hydroxyl groups covalently bound to the outer surface of the abrasive particle, wherein the adhesion promoter comprises at least one ring-opened adduct of:
- a) a polyepoxide having at least two epoxy groups;
- b) an aminosilane represented by the formula
- HNR1R2
- wherein R1 and R2 independently represent —Z—SiL3, wherein each Z independently represents a divalent linking group having from 1 to 12 carbon atoms, and wherein each L independently represents a hydrolyzable group, and
- c) an isocyanatosilane represented by the formula
- O═C═N—Z—SiL3
- wherein Z and L are as previously defined.
Dependencies are inferred from the claim text.