Coated abrasive article containing a polyurethane adhesive splic

Details Coated abrasive article containing a polyurethane adhesive splic Coated abrasive article containing a polyurethane adhesive splic

1976-06-14

1977-06-07

Arnold, Donald J.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51298A, 51399, B24D 1106

Patent

active

040274357

ABSTRACT:
An adhesive composition which, in the preferred aspects of the invention, is a partially cured reaction product of the composition in the form of a dried, preformed film that is heat-activatable, is provided comprising in admixture a poly-functional active hydrogen containing component consisting of, in combination, a hydroxyl terminated polyurethane polyester having a hydroxyl number no greater than about 15 and a member containing at least difunctional active hydrogen having an active hydrogen equivalent weight of at least about 27 and less than about 500, a component having available free isocyanate groups, and a fourth component such as a chlorinated aliphatic hydrocarbon, a chlorinated aromatic hydrocarbon, or an alkylated polystyrene. The partially cured, preformed adhesive film of this invention permits joint formation under pressure at relatively low temperatures and over a relatively wide temperature range, thereby making it possible to join together various materials which would otherwise present a problem in joining because of their lack of heat resistance. Joints formed have unusually high resistance to flexural fatigue.

REFERENCES:
patent: 3154897 (1964-11-01), Howard
patent: 3402514 (1968-09-01), Johnson
patent: 3637359 (1972-01-01), Malloy
patent: 3763604 (1973-10-01), Malloy
patent: 3770555 (1973-11-01), Gladstone
patent: 3872629 (1975-03-01), Malloy

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