Process for preparing elastomeric polyurethane or polyurethane-u

Details Process for preparing elastomeric polyurethane or polyurethane-u Process for preparing elastomeric polyurethane or polyurethane-u

1990-06-04

1992-04-21

Kight, III, John

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...

560335, 2643281, C08G 1832, C07C12724

Patent

active

051068745

ABSTRACT:
A process is disclosed for preparing a polyurethane or polyurea elastomer by reacting in a closed mold a reaction mixture comprising a polyisocyanate and a relatively high equivalent weight polyether. The process is characterized by employing as said polyether a polymer or copolymer of propylene oxide having at least two hydroxyl groups per molecule, an equivalent weight from about 1000 to about 5000 and a monofunctional species content of about 0.04 milliequivalents/gram of polymer or less.

REFERENCES:
patent: 4595742 (1986-06-01), Nalepa et al.
patent: 4687851 (1987-08-01), Laughner
patent: 4816600 (1989-03-01), Gillis, Jr.
T. H. Austin, "RIM Elastomers from Low Unsaturation Polyols", Abstract of proposed paper of 32nd Annual Polyurethane Conference, Oct. 1-4, 1989, Feb. 22, 1989.
Bylsma et al., "Improvement of Properties of Urethane Elastomers by Removal of Terminal Unsaturation in Poly(oxypropylene)Diols", Ind. Eng. Chem. Prod. Res. Develop, vol. 7, pp. 234-238 (1968).
J. Arceneaux et al., "The Effect of Monohydroxy Polyether Polyols on the Processing. Reactivity, and Physical Properties Performance of Flexible Slabstock Foam System", Journal of Elastomers and Plastics, vol. 14, p. 63 (1982).

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