Curable polyurethanes

Details Curable polyurethanes Curable polyurethanes

1982-06-28

1983-10-04

Welsh, Maurice J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525438, 525440, 525454, 528 75, C08G 1830

Patent

active

044080204

ABSTRACT:
Polyurethanes prepared from hydroxyl terminated polymers, organic diisocyanates and polyethers having terminal hydroxyl and unsaturated groups or terminal hydroxyl and pendant unsaturated groups, are soluble in solvents for deposition on a carrier that after removal of the solvent can be wound and processed as by calendaring and slitting immediately after removal from a solvent drying oven without layer to layer adhesion or other disruption of the coating. After such processing, the binder compositions containing the polyurethane may be crosslinked or cured in a few seconds by electron beam radiation to provide an improved stable coating. These polyurethanes combined with phenoxy resins form particularly useful binder systems for magnetic tape.

REFERENCES:
patent: 4254230 (1981-03-01), Howard
patent: 4255243 (1981-03-01), Coqueugniot et al.
patent: 4260703 (1981-04-01), Hodakowski et al.
patent: 4264752 (1981-04-01), Watson

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