Terephthalic containing hybrid castable resins

Details Terephthalic containing hybrid castable resins Terephthalic containing hybrid castable resins

1988-11-28

1990-01-09

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 75, C08G 1862

Patent

active

048929190

ABSTRACT:
Hybrid resins result from the combination of the urethane and unsaturated polyester technology. Improved resin casting and laminate properties are obtained when polyalkylene terephthalate unsaturated polyesters are employed, in lieu of the isophthalic polyesters of the prior art. Especially notable are improved heat distortion temperatures which exceed substantially those of the isophthalic based resins. The economics of using such terephthalate resins is demonstrated. Also within the scope of the present invention is the use of secondary hydroxyl compounds in the preparation of the polyesters. It has previously been believed that such compounds led to embrittlement of the final hybrid.

REFERENCES:
Handling and Physical Properties of Hybrid Polyesters, by H. R. Edwards-39th Annual Conference, Reinforced Plastics/Composites Institute, The Society of the Plastics Industry, Inc./Jan. 16-19, 1984 (pp. 1-8, Session 8-C).
The Applicantion of Isophthalic Unsaturated Polyester Urethane Hybrids in Conventional Molding Techniques, by H. R. Edwards-42nd Annual Conference Composites Institute, The Society of the Plastics Industry, Inc.,/Feb. 2-6, 1987 (pp. 1-6, Session 8-C).

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