Patent GB-985751-A (GB)
Title: Improvements in or relating to abrasive products
IPC: C08L67/06
Filed: 1961-03-22
Abstract: Abrasive products have abrasive grains dispersed throughout a bond composed of (a) a stabilizing bond which is a resin and an agent which will cure it at room temperature and (b) a compatible principal bond, viz. a rubber or resin which cures at a relatively high temperature.  After curing the stabilizing bond between room temperature and 70 DEG  C., the grains and principle bond are held dispersed in a hardened matrix, thus preventing slumping during curing of the principal bond.  Stabilizing bonds mentioned are a liquid diglycidyl ether epoxy resin or a liquid epoxy-novolac with a cyano ethylated amine or amino polyamide curing agent, or a liquid unsaturated polyester resin with a methyl ethyl ketone peroxide curing agent.  It may replace 10-20% by weight of principal bond which may be shellac, phenol-formaldehyde or rubber.  In examples, abrasive wheels are formed from mixtures of (1) aluminium oxide, liquid phenolic resin, powdered shellac, castor oil, and liquid diglycidyl ether epoxy resin with cyanoethylated amine curing agent, (2) silicon carbide, powdered shellac, castor oil, and liquid diglycidyl ether with amino polyamide curing agent, (3) silicon carbide, liquid phenolic resin, powdered shellac, castor oil, and liquid diglycidyl ether epoxy resin with aminopolyamide curing agent, (4) silicon carbide, liquid phenolic resin, powdered shellac, castor oil, and liquid epoxy-novolac with cyanoethylated amine curing agent, (5) aluminium oxide, liquid phenolin resin, powdered phenol-formaldehyde novolac, neutral anthracene oil, and liquid diglycidyl ether epoxy resin with cyanoethylated amine curing agent, (6) silicon carbide, liquid phenolic resin, powdered shellac, castor oil, and liquid unsaturated polyester resin "Vibrin" (Registered Trade Mark) with methyl ethyl ketone peroxide curing agent).  Wheels made according to the invention are compared with standard control wheels.  U.S.A. Specification 2,493,948 is referred to.ALSO:Abrasive products have abrasive grains dispersed throughout a bond composed of (a) a stabilizing bond which is a resin and an agent which will cure it at room temperature, and (b) a compatible principal bond, viz. a rubber or resin which cures at a relatively high temperature. After curing, the stabilizing bond between room temperature and 70 DEG  C., the grains and principle bond are held dispersed in a hardened matrix, thus preventing slumping during curing of the principal bond. Stabilizing bonds mentioned are a liquid diglycidyl ether epoxy resin or a liquid epoxynovolac with a cyano ethylated amine or amino polyamide curing agent, or a liquid unsaturated polyester resin with a methyl ethyl ketone peroxide curing agent.  It may replace 10-20% by weight of principal bond which may be shellac, phenol-formaldehyde or rubber.  In examples, abrasive wheels are formed from mixtures of (1) aluminium oxide, liquid phenolic resin, powdered shellac, castor oil, and liquid diglycidyl ether epoxy resin with cyanoethylated amine curing agent, (2) silicon carbide, powdered shellac, castor oil, and liquid diglycidyl ether with amino polyamide curing agent, (3) silicon carbide, liquid phenolic resin, powdered shellac, castor oil, and liquid diglycidyl ether epoxy resin with aminopolyamide curing agent, (4) silicon carbide, liquid phenolic resin, powdered shellac, castor oil, and liquid epoxy-novolac with cyanoethylated amine curing agent, (5) aluminium oxide, liquid phenolic resin, powdered phenol-formaldehyde novolac, neutral anthracene oil, and liquid diglycidyl ether epoxy resin with cyanoethylated amine curing agent, (6) silicon carbide, liquid phenolic resin, powdered shellac, castor oil, and liquid unsaturated polyester resin ("Vibrin" (Registered Trade Mark) with methyl ethyl ketone peroxide curing agent).  Wheels made according to the invention are compared with standard control wheels.