Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1984-03-29
1985-12-17
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
36 25R, 521137, 521159, 528 60, 528 66, C08G 1814
Patent
active
045593663
ABSTRACT:
There are provided improved integral skin microcellular polyether polyurethane elastomer products, e.g., shoe soles, which are characterized by outstanding low temperature dynamic flex and green strength at demold, at specific gravities as low as about 0.4 gm/cc. These elastomer products are desirably prepared from a two-component system, e.g., the reaction of Component A containing improved quasi-prepolymers, with Component B comprising a compatible liquid mixture containing poly(oxyethyleneoxypropylene)polyol, difunctional chain extender, halogenated blowing agent and other ingredients, as needed, over a relatively wide isocyanate index range without the drawback of any significant loss in the elastomer properties due to index fluctuation within said range.
Improved integral skin microcellular polyether elastomers of low densities, e.g., 0.45 gm/cc, characterized by an excellent smooth surface appearance essentially devoid of blemishes can also be prepared from such two-package systems without the use of water as a secondary blowing agent.
The said quasi-prepolymers are normally-liquid, may have crystalline points as low as -20.degree. C., and are derived from the reaction of (1) a mixture of normally solid diphenylmethane diisocyanate, carbodiimide and/or uretone imine and (2) poly(oxyethyleneoxypropylene)polyols.
REFERENCES:
patent: 3304273 (1967-02-01), Stamberger
patent: 3383351 (1968-05-01), Stamberger
patent: 3644457 (1972-02-01), Konig et al.
patent: 4042537 (1977-08-01), Dahm et al.
patent: 4111861 (1978-09-01), Godlewski
patent: 4125691 (1978-11-01), White
patent: 4374210 (1983-02-01), Ewen et al.
patent: 4448903 (1984-05-01), Liang et al.
Pirri Jaquelyn P.
Pirri Vincent P.
Welsh Maurice J.
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