Abrasion resistant polyurethane blend compositions

Details Abrasion resistant polyurethane blend compositions Abrasion resistant polyurethane blend compositions

1991-02-21

1992-05-19

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

4284242, 4284256, C08K 554

Patent

active

051150077

ABSTRACT:
The present invention relates to a primerless, one-part, storage stable, fast heat curable, abrasion-resistant coating composition useful as a low friction coating for an EPDM glass run channel in vehicles or similar applications. The coating composition comprises a blocked polyurethane prepolymer, a coreactive crosslinking agent, and a compatible silicone oil. The blocked polyurethane is desirably made from a hydroxyl terminated hydrogenated diene polymer or polyolefin, which is reacted with excess equivalents of a polyisocyanate reactant and the isocyanate groups blocked with a blocking agent. The cured polyurethane has very good abrasion resistance.

REFERENCES:
patent: 4898919 (1990-02-01), Ueda et al.

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