C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
402/150, 403/40,
C07C 69/34 (2006.01) C07C 67/08 (2006.01) C07C 69/42 (2006.01) C07C 69/657 (2006.01) C07C 69/80 (2006.01) C08G 18/42 (2006.01)
Patent
CA 1281734
A PROCESS FOR THE PRODUCTION OF OLIGOESTERS CONTAINING HYDROXY GROUPS AND THEIR USE ABSTRACT OF THE DISCLOSURE Oligoesters having hydroxyl groups and an OH number of from 200 to 600 mg KOH/g are made by reacting a cyclic dicarboxylic acid anhydride in which no halogen is present with a polyfunctional alcohol or dialkanolamine in a molar ratio of from 1:0.5 to 1:1.5 at a temperature of from 50 to 150°C to form the corresponding dicarboxylic acid semiester and/or semiamide. This semiester and/or semiamide is then alkoxylated with ethylene oxide and/or propylene oxide in the presence of a catalyst at 80 to 150°C. The equivalent ratio of acid groups to alkylene oxide groups is from 1:0.8 to 1:1.7. The catalysts are reaction products of alkoxides with at least 3 C-atoms with ammonia, piperidine, piperazine and/or C2-C6 aliphatic, polyamines, preferably diamines in which all of the NH- functional groups have been alkoxylated. The resultant oligoester may then be reacted with a polyisocyanate optionally in the presence of known additives, such as blowing agents and catalysts.
539249
Dietrich Manfred
K"onig Klaus
Kapps Manfred
Nast Roland
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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