Isocyanate cured polysulphide polymers

Details Isocyanate cured polysulphide polymers Isocyanate cured polysulphide polymers

1992-02-20

1993-05-18

Welsh, Maurice J.

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...

524589, 528 28, 528 58, 528 76, 525534, 525537, 4273855, C08L 7504

Patent

active

052122310

ABSTRACT:
A polysulphide resin composition is cured by reacting a liquid polysulphide resin with an isocyanate curing agent in the presence of an organometallic or metal salt catalyst, preferably an organotin catalyst such as dibutyltin laurate (DBTL). The compositions have utility in thin films and coatings, and in the bonding, sealing and coating of polycarbonates. Aliphatic isocyanates are preferred for applications where clear coatings are required, the more reactive aromatic isocyanates being preferred for other applications.

REFERENCES:
patent: 4349656 (1982-09-01), Arendt et al.
Roberts et al, Basic Principles of Organic Chemistry, 1964, pp. 754-755.

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