Abrasive articles and methods of making same

Details Abrasive articles and methods of making same Abrasive articles and methods of making same

1994-09-19

1997-03-18

Jones, Deborah

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51294, 51298, 51304, B24D 302

Patent

active

056118252

ABSTRACT:
Film-backed and paper-backed coated abrasives and methods of making same are described using coatable urea-aldehyde binder precursor compositions including a urea-aldehyde resin and a cocatalyst, which yield more consistent quality coated abrasives. In addition, the compositions have longer pot life and allow curing at lower temperatures. The urea-aldehyde resins have an aldehyde/urea molar ratio of at least about 1.0, more preferably ranging from about 1.0 to about 2.0, and a free aldehyde content ranging from about 0.1 to about 3.0 weight percent based on weight of total aldehyde. The cocatalyst consists essentially of a Lewis acid and a salt selected from the group consisting of ammonium ion salts and organic amine salts. Paper-backed abrasive articles may employ a fabric nonwoven layer between the abrasive coating and the paper layer to reduce abrasive particle shelling.

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