Chain-stopped unsaturated polyester resins

Details Chain-stopped unsaturated polyester resins Chain-stopped unsaturated polyester resins

1990-09-12

1992-06-02

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

525440, 525445, 525447, 528193, 528194, 528272, 528306, C08G 6302, C08G 6318, G08F 2000

Patent

active

051187833

ABSTRACT:
A monofunctional alcohol or acid is used to chain stop a condensation reaction for preparing a low molecular weight unsaturated polyester resin. The monofunctional acid removes terminal hydroxy groups and replaces them with hydrocarbon groups. The monofunctional alcohol removes terminal carboxy groups and replaces them with hydrocarbon groups. The resulting polyester resins having improved hydrolytic stability. These chain stopped unsaturated polyester resins can be further modified with hydroxy acrylates, other hydroxy terminated polyesters, and diisocyanates to produce resins with excellent water resistance and physical properties for various applications, such as marble/onyx resins, sheet molding compounds, bulk molding compounds and resin transfer molding resins, gel coats, and bowling ball resins.

REFERENCES:
patent: T959005 (1977-01-01), Davis et al.
patent: 4554329 (1985-11-01), Sinker et al.

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