Starter feed stream acidification in DMC-catalyzed process

Details Starter feed stream acidification in DMC-catalyzed process Starter feed stream acidification in DMC-catalyzed process

2011-04-05

2011-04-05

Feely, Michael J (Department: 1761)

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

Synthetic resins

From organic oxygen-containing reactant

C568S620000, C568S621000, C568S679000, C568S680000

Reexamination Certificate

active

07919575

ABSTRACT:
The process of the present invention provides for the manufacture of lower molecular weight DMC-catalyzed polyols than is possible using non-acidified continuous addition of starter (CAOS) feeds, by adding excess acid to a starter feed stream over that required for mere neutralization of the basicity of the starter. The benefits of the invention also extend to starters which do not contain basicity. Polyether polyols made by the inventive process may be used to produce improved polyurethane products such as coatings, adhesives, sealants, elastomers, foams and the like.

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Machine translation of JP 2005-272838 A, provided by the JPO website (no date).

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