Impregnated grinding wheel

Details Impregnated grinding wheel Impregnated grinding wheel

B - Operations, Transporting

24

D

B24D 3/18 (2006.01) B24D 3/34 (2006.01)

Patent

CA 2478899

A vitreous bonded abrasive article, more particularly a grinding wheel, having, improved grinding performance is provided wherein the open pores of the abrasive article contain an impregnant which comprises at least one water insoluble, sulfur bearing organic substance having at least one carbon to sulfur bond, at least about 5% by weight sulfur and a melting point of at least about 30~C said melting point being at least 10~C below the decomposition temperature of the substance and selected from the group consisting of substituted and unsubstituted aliphatic, aromatic, cycloaliphatic, alkenyl, alkynyl, alkylaryl, arylalkyl and substituted heterocyclic sulfur bearing organic substances or a mixture of said substances grinding aid. The impregnant is free of a medium, other than the water insoluble, sulfur bearing substance, in which the substance or a mixture of such substances is dissolved or dispersed. Vitreous bonded grinding wheels in accordance with the invention showing improved grinding performance have been produced having open pores containing an impregnant comprising a water insoluble, sulfur bearing substance in accordance with the following formula as the sole constituent of the impregnant., wherein R~1, R~2, R~3 and R4 are the same or different and are selected from the group consisting of alkyl, aryl, cycloalkyl, arylalkyl and alkylaryl groups and x is from 1 to 6.

L'invention concerne un article abrasif vitreux li~, et plus particuli­rement une meule, ~ performance de meulage am~lior~e. Les pores de cet article abrasif contiennent un produit d'impr~gnation comprenant au moins substance organique porteuse de soufre insoluble dans l'eau dot~e d'au moins un carbone li~ au soufre et au moins environ 5 % en poids de soufre, et un point de fusion d'au moins environ 30 ~C, ledit point se trouvant au moins 10 ~C en-dessous de la temp~rature de d~composition de ladite substance. Cette substance est s~lectionn~e dans le groupe constitu~ par alc~nyle, alcynyle, alkylaryle, arylalkyle aliphatiques, aromatiques, cycloaliphatiques, substitu~s et non substitu~s, et des substances organiques porteuses de soufre h~t~rocycliques substitu~es ou un m~lange de ces auxiliaires de meulage. Le produit d'impr~gnation ne comprend pas de milieu autre que la substance organique porteuse de soufre insoluble dans l'eau dans lequel ladite substance ou un m~lange de substances est dissous ou dispers~. Les meules vitreuses li~es de l'invention pr~sentant une performance de meulage am~lior~e sont dot~es de pores ouverts qui contiennent, comme seul constituant du produit d'impr~gnation, une substance organique porteuse de soufre insoluble dans l'eau repr~sent~e par la formule (I). Dans cette formule, R´1?, R´2?, R´3? et R´4? sont identiques ou diff~rents et sont s~lectionn~s dans le groupe constitu~ par les groupes alkyle, aryle, cycloalkyle, arylalkyle et alkylaryle, et x est compris entre 1 et 6.

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