Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1987-10-16
1989-08-29
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
524 37, 524 41, 525123, 525131, C08G 1814
Patent
active
048618039
ABSTRACT:
In one aspect, this invention is a polyurethane polymer having dispersed therein elongated particles of a high-melting, rigid polymer in an amount sufficient to measurably increase the tensile strength and/or elongation of the polyurethane relative to a like polyurethane which is prepared in the absence of said elongated particles.
In another aspect, this invention is an active hydrogen-containing composition comprising at least one active hydrogen-containing compound having dispersed therein elongated particles of a high-melting rigid polymer in an amount which provides reinforcement to a polyurethane polymer prepared by reacting said active hydrogen-containing composition with a polyisocyanate.
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patent: 4102831 (1978-07-01), Osgood
patent: 4207407 (1980-06-01), Helminiak et al.
Sato, "Research Progress in Thermotropic Liquid Crystal Polyurethanes," Porima Daijesuto, vol. 37, No. 6, pp. 10-16 (1985).
Jadhav and Kantor, "Liquid Crystqalline Polyurethanes (LCPU): A New Class of Anisotropic Polymers," published at the Gordon Research Conference on Polymer Liquid Crystals on Jul. 7-11, 1986.
Iimura et al., Makromol. Chem. 182, p. 2589, (1981).
Tanaka et al., Polym. Prep Japan, 33(7), 1647 (1984).
Verbit et al., "Synthesis and Liquid Crystal Properties of Some Urethanes," Mol. Cryst. Liq. Cryst. 1975, vol. 30, pp. 89-99 (1972).
Tanaka et al., "Liquid Crystallinity of Polyurethane Containing Biphenyl Units," Kobunshi Ronbunshu, vol. 43, pp 311-314 (1986).
The Dow Chemical Company
Welsh Maurice J.
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