Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1980-07-01
1981-11-24
Cockeram, H. S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
248634, 260DIG46, 521914, C08G 1814, C08G 1848
Patent
active
043025528
ABSTRACT:
A vibration isolator consisting essentially of a microcellular polyurethane elastomer having a bulk density of 0.3-0.9 g/cm.sup.3, said polyurethane elastomer obtained by reacting in the presence of water as the blowing agent (a) an organic polyisocyanate, (b) a polyether polyol having an average number of functional groups of 2.5-3.5 and a number average molecular weight of 4500-8500, and (c) a chain extender, in such a ratio that the NCO index is 90-110 and the concentration of the chain extender, based on the total weight of the three components (a), (b) and (c), is (0.4-2.0).times.10.sup.-3 equivalent/gram.
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Peter Sherwood Associates, Polyurethane Foams, Elastomers & Intermediates, 1977-1980 (Feb. 1978) New York.
Lowe et al, Jour. of Cellular Plastics, Jan. 1965, pp. 121-130.
Klapproth, "Propylene Glycols & Polypropylene Glycol", Chemical Economics Handbook, Manlow Park, CA (Mar. 1978).
Gaylord, Polyethers, Part I, Interscience, N.Y. (1963) pp. 321-323.
Saunders et al., Polyurethanes Part I, Krieger, Huntington, N.Y. (1978), pp. 32-45.
Sanyo Chemical Industries (Japan) Feb. 1973 12 pages.
Hongu Tatsuya
Ogawa Yoshihiko
Suzuki Toshio
Cockeram H. S.
Nisshin Spinning Co., Ltd.
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