Rigid thermoplastic plyurethane comprising units of butane diol

Details Rigid thermoplastic plyurethane comprising units of butane diol Rigid thermoplastic plyurethane comprising units of butane diol

1996-05-03

1997-05-06

Foelak, Morton

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...

C08G 1832

Patent

active

056272545

ABSTRACT:
The present invention is a rigid thermoplastic polyurethane (RTPU) comprising units of butane diol (BDO) and a polyethylene glycol (PEG) of the type HO--(CH.sub.2 CH.sub.2 O).sub.n --H, where n is an integer from 2 to 6. The RTPU of the present invention addresses a problem in the art by providing a potentially lower-cost alternative to an RTPU prepared from hexane diol, and further providing an RTPU that can be customized to a desired toughness, T.sub.g, yield strength, and transparency. The RTPUs that are prepared from certain mole ratios of BDO and the PEG exhibit a surprisingly high degree of toughness manifested by increased tensile elongation to break.

REFERENCES:
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patent: 4376834 (1983-03-01), Goldwasser et al.
patent: 4385133 (1983-05-01), Alberino et al.
patent: 4522975 (1985-06-01), O'Connor et al.
patent: 4822827 (1989-04-01), Bonk
patent: 5167899 (1992-12-01), Jezic

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