The Upjohn Co.

The Dow Chemical Company

George H Temme

Curtis P Smith

Fred A Stuber

Dale F Regelman

Louis M Alberino

An improved process for the production of organic polyisocyanate-based molded polymers prepared from at least one organic polyisocyanate and at least one polyol wherein there is employed an internal mold release agent comprising an amino-polysiloxane having at least one group of the formula

Process for the production of organic polyisocyanate-based molded

Disclosed is an improved process for the production of organic polyisocyanate-based molded polymers prepared from at least one organic polyisocyanate and at least one polyol wherein there is employed an internal mold release agent comprising an amino-polysiloxane having at least one group of the formula

Product

Disclosed is an improved process for the production of organic polyisocyanate based molded polymers prepared from at least one organic polyisocyanate and at least one polyol in the presence of an internal release agent wherein the improvement comprises employing as said agent a polysiloxane having at least one unit of the formula ##STR1## wherein R is selected from the group consisting of lower-alkyl and aryl, R.sup.1 is a divalent hydrocarbon radical, and R.sup.2 is selected from the group consisting of lower-alkoxy, aryloxy, particular hydroxyalkyleneoxy, alkoxyalkyleneoxy, amino, and hydroxyalkylamino radicals. The molding process can be repeated in many cycles before the molds require cleaning or treatment with release agent. The ease and rapidity with which the present process can be carried out makes it particularly suited to RIM production methods.

Polyurethane process using polysiloxane mold release agents

There is disclosed a novel process for the preparation of 1,4-diazabicyclooctane dihydrohalides having the formula ##STR1## wherein each R is independently selected from the group consisting of hydrogen, lower alkyl, aryl, aralkyl, and cycloalkyl, and X is chlorine or bromine, said process comprising heating at a temperature of at least about 100.degree. C. and in a dipolar aprotic solvent certain novel dihaloalkylene diamines. Neutralization of the dihydrohalides provides the corresponding 1,4-diazabicyclooctane free bases. Also disclosed are certain novel 1,4-diazabicyclooctane diammonium dihalides formed as intermediates in the above process and a process for their conversion to the 1,4-diazabicyclooctane dihydrohalides and free bases thereof. The 1,4-diazabicyclo compounds produced in accordance with the invention find particular utility as catalysts in the preparation of polyurethanes from organic polyols and polyisocyanates.

1,4-Diazabicyclooctane di-N,N'-quaternized compounds

A process is described for the preparation of a polymer having a recurring unit of the formula: ##STR1## where R is hydrogen or methyl, C.sub.n H.sub.2n is lower-alkylene, R.sub.1 and R.sub.2 are aryl or lower-alkyl, and x is 0 or 1. A polymer having a recurring unit of the formula: ##STR2## where X is chloro, bromo, iodo, chloroalkyl, bromoalkyl or iodoalkyl, is reacted with the appropriate aryl or alkyl chloride or bromide and arsenic trichloride, arsenic tribromide or arsenic trioxide in the presence of sodium, magnesium, or lithium metal. The resulting polymer is an intermediate in the preparation, by oxidation, of the corresponding As-oxide which polymer is useful as a catalyst for the conversion of isocyanates to the corresponding carbodiimides.

Process for preparing organo-arsenic derivatives of polystyrene and

A process is described for the preparation of a polymer having a recurring unit of the formula: ##STR1## where R is hydrogen or methyl, C.sub.n H.sub.2n is lower-alkylene, R.sub.1 and R.sub.2 are aryl and x is 0 or 1. A polymer having a recurring unit of the formula: ##STR2## where X is chloro, bromo, iodo, chloroalkyl, bromoalkyl or iodoalkyl, is reacted with a triarylarsine in the presence of lithium or sodium-potassium alloy. The resulting polymer is an intermediate in the preparation, by oxidation, of the corresponding As-oxide. The latter is useful as a catalyst for the conversion of isocyanates to the corresponding carbodiimides.

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North Haven, CT, United States of America

George H Temme