Isocyanate-curing coating material and method for application th

Details Isocyanate-curing coating material and method for application th Isocyanate-curing coating material and method for application th

1997-07-16

1999-11-09

Zitomer, Fred

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

Synthetic resins

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

4284231, 525374, 528 59, C08L 7504, C08F 830

Patent

active

059816600

ABSTRACT:
An isocyanate-curing coating material is disclosed which essentially consists of (A) an agent formed of a hydroxyl group-containing polymer having a weight average molecular weight in the range of 1000-20000 and (B) a polyisocyanate compound as a curing agent containing at least three isocyanate groups in the molecular unit thereof and having a weight average molecular weight in the range of 400-3000 and incorporating (A) the agent and (B) the curing agent in such amounts that the isocyanate groups in (B) the curing agent amounts to 0.5-2 equivalent weights per equivalent weight of the hydroxyl group in (A) the agent. A method for spray coating the isocyanate-curing coating material is also disclosed which comprises the steps of mixing (A) the agent with (B) the curing agent in a coating device, heating the resultant mixture therein to a temperature in the range of 35-80.degree. C., and spraying the hot mixture directly on a given object with the coating device.

REFERENCES:
patent: 5314953 (1994-05-01), Corcoran et al.
patent: 5354797 (1994-10-01), Anderson et al.
patent: 5731382 (1998-03-01), Bederke et al.

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