The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1979
Filed:
Sep. 29, 1977
Eckart Teschner, Hunstetten-Limbach, DE;
Harald Riedel, Mainz, DE;
Richard Sattelmeyer, Schlangenbad-Georgenborn, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
An abrasive material and process for manufacturing the same. The process comprises: (i) applying a basic binder layer to a flexible support; (ii) scathering abrasive particles onto the basic binder layer; (iii) drying and subsequently cooling the resultant product; (iv) applying a second binder layer as a sizer to the cooled product of step (iii); (v) drying and cooling the sizer; (vi) loosely rolling up the product of step (v); and (vii) curing and subsequently cooling the product of step (vi) by passing a heating or cooling air stream substantially axially through the rolled-up product. The basic and second binder layers each comprise an aqueous mixture of (A) at least one predominantly ortho-structural resol having a molar ratio of phenolic component to formaldehyde of from 1:(1.1 to 2.5), and (B) at least one polyvinyl alcohol in an amount of from 5 to 30% by weight based on the weight of solid phenolic resin.