| 摘要 |
FIELD: tools for grinding. ^ SUBSTANCE: composition comprises abrasive and polyurethane binder that comprises polyol and polyisocyanate. The ratio of polyol to polyisocyanate is from 1:1 to 1:1.5. The limit ratio of abrasive to polyurethane binder is from 80:20 to 10:90. The optimal ratio of the abrasive filler to the binder is 50:50. The polyurethane binder comprises polyol and polyisocyanate. Polyol is composed of simple polyester triol with a molecular mass of 5000, polyester diol with a molecular mass of 400-700, activator, crystalline hydrate, and surface-active agent. The method of manufacturing flexible abrasive tool comprises combining the abrasive with the polyurethane binder, mixing the mixture, filling into the mould, and solidifying. The components of the binder are made of polyol and polyisocyanate. The abrasive filler is separated into two parts proportional to the ratio of polyol to polyisocyanate. The components of each part are mixed and the parts are combined and mixed for 0.5-2 min and are then supplied to the moulds for solidification. ^ EFFECT: improved quality and simplified manufacturing. ^ 3 cl, 6 dwg |
