Preparation of amino polyols
Номер патента: CA1210761A
Опубликовано: 02-09-1986
Автор(ы): Kenneth G. Mcdaniel
Принадлежит: EASTMAN CHEMICAL COMPANY, Kenneth G. Mcdaniel, The Dow Chemical Company
Опубликовано: 02-09-1986
Автор(ы): Kenneth G. Mcdaniel
Принадлежит: EASTMAN CHEMICAL COMPANY, Kenneth G. Mcdaniel, The Dow Chemical Company
Реферат: PREPARATION OF AMINO POLYOLS ABSTRACT An improved method is disclosed for producing amino polyols useful in preparing polyurethane foams. The improvement concerns charging ammonia, a primary amine or a secondary amine to the reaction vessel at the end of the oxide digestion step. The amine or ammonia scavenges the residual oxide and the resulting alkanol amine becomes one of the components of the polyol mixture. Alkanol amines are beneficial components of urethane polyols. In prior art industrial practice, residual oxide is vented to a scrubber system and then stripped to a low concentration.
Optical articles and methods for preparation of same
Номер патента: US09891349B2. Автор: Matthew J. Kryger,Federico Menta,Nina Vassileva Bojkova,Marvin Jerome Graham. Владелец: PPG Industries Ohio Inc. Дата публикации: 2018-02-13.