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US 5,962,120 AGranted
Abrasive article back up pad with foam layer
AssigneeMinnesota Mining and Manufacturing Company
InventorSteven J. Keipert
Life of this patent
Estimating the term…
Abstract
An abrasive article back up pad having a resilient, open cell polyurethane foam formed as the reaction product of a polyether polyol and an aromatic polyisocyanate, such as an aromatic polyisocyanate including methylene diphenyl diisocyanate ("MDI"), and this foam is attached to the backside of an abrasive article.
Claims29
A back up pad suitable for use with an abrasive article, comprising:
- an abrasive article comprising a flexible backing layer having a front side and a back side, and an abrasive coating adhered to said front side;
- and
- a back up pad comprising a resilient, open cell foam layer, having a front surface, said foam layer comprising a polyurethane polymer consisting essentially of the reaction product of:
- (a) at least one polyether polyol selected from the group consisting of ethylene oxide capped diols, ethylene oxide capped triols, and ethylene oxide capped tetrols and mixtures thereof;
- (b) methylene diphenyl diisocyanate;
- and
- (c) a crosslinker;
- wherein said front surface of said foam layer is adapted for attachment to said back side of said backing layer of said abrasive article.
5 more elements
A back up pad suitable for use with an abrasive article having an abrasive surface and an attachment surface, the back up pad comprising:
- a resilient, open cell foam body having an attachment surface which is engageable with the attachment surface of the abrasive article, said foam body comprising a polyurethane polymer consisting essentially of the reaction product of:
- (a) at least one polyether polyol selected from the group consisting of ethylene oxide capped diols, ethylene oxide capped triols, and ethylene oxide capped tetrols and mixtures thereof;
- (b) methylene diphenyl diisocyanate;
- and
- (c) a crosslinker;
- wherein said foam body is adapted for detachable coupling to a drive motor.
3 more elements
Dependencies are inferred from the claim text.