Process for preparing a stable dispersion of a polymer in a poly

Details Process for preparing a stable dispersion of a polymer in a poly Process for preparing a stable dispersion of a polymer in a poly

1983-05-31

1985-02-05

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521904, 524757, 524761, 524762, 524765, 524766, 524769, 524875, 525458, C08G 1865, C08G 1866, C08K 505, C08K 506

Patent

active

044979134

ABSTRACT:
A stable dispersion of a polymer in a polyol is prepared by reacting an organic polyisocyanate with a short-chain polyol in a high molecular weight polyol containing a relatively high primary hydroxyl group content, the ratio of the content of primary hydroxyl groups in the short-chain polyol to that in the high molecular weight polyol being at least a critical lower limit of about 3.5. The reaction is further carried out in the presence of a small proportion of water to achieve a reduction in the viscosity of the resulting dispersion. The dispersion is used in preparing high resilience polyurethane foam having desirable physical properties and which is of utility in a wide variety of cushioning applications.

REFERENCES:
patent: 3325421 (1967-06-01), Muller
patent: 3360495 (1967-12-01), Muller
patent: 4089835 (1978-05-01), Konig
patent: 4093569 (1978-06-01), Reischl
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patent: 4293470 (1981-10-01), Cuscurida
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patent: 4298511 (1981-11-01), Schimmel
patent: 4324716 (1982-04-01), Reischl
patent: 4337184 (1982-06-01), Schimmel
patent: 4374209 (1983-02-01), Rowlands
patent: 4407983 (1983-10-01), Gerkin

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