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A Static Dissipative Size Coat for Coated Abrasives using a Conductive Polymer

IP.com Disclosure Number: IPCOM000033130D
Publication Date: 2004-Nov-29
Document File: 2 page(s) / 13K

Publishing Venue

The IP.com Prior Art Database

Abstract

Coated abrasives are subject to generating large amounts of static buildup during the abrading process. Typically, the static charge can build to 50-100 kV. Obviously, the accumulation of electric charge can be potentially dangerous to operators and their work. As such, methods of dissipating the charge are beneficial. Some solutions to this problem have been presented including using carbon-black additives in the abrasive (US 5108463), and doped polymers (US 50161294). This article describes the method of inducing static dissipating properties to an abrasive by adding conductive polymers to a urea-formaldehyde (UF) based size coat.

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A Static Dissipative Size Coat for Coated Abrasives using a Conductive Polymer

Coated abrasives are subject to generating large amounts of static buildup during the abrading process.  Typically, the static charge can build to 50-100 kV. Obviously, the accumulation of electric charge can be potentially dangerous to operators and their work.  As such, methods of dissipating the charge are beneficial.  Some solutions to this problem have been presented including using carbon-black additives in the abrasive (US 5108463), and doped polymers (US 50161294).  This article describes the method of inducing static dissipating properties to an abrasive by adding conductive polymers to a urea-formaldehyde (UF) based size coat.

 

To construct the static dissipative abrasive, a resinous size coat (top layer of adhesive) is prepared by adding the conductive polymer poly(3,4-ethylenedioxythiphene), trademarked as Baytron P by Bayer (Figure 1), to a urea-formaldehyde resin.  Other reagents or additives can be added to the formulation, such as catalysts, curatives, latexes, defoamers, and wetting agents.  This blend is then coated onto a previously prepared coated abrasive which does not have a size coat (i.e. the abrasive has only one adhesive layer holding the mineral).  The abrasive is then baked at 70 oC for 30 minutes to ensure that the resin is dried and cured.

The conductivity of samples containing various levels of Baytron was determined using a PRO STAT Surface Resistance & Re...