ES370267A1 - Procedure for the preparation of molding bodies. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Procedure for the preparation of molding bodies, including surface structures, characterized by reacting with each other, with hot modeling, until reaching the crosslinked and infusible state: 1) a polyepoxy compound with at least one carbocyclic or heterocyclic ring; 2) a polycarboxylic anhydride with a carbocyclic ring at least, in an amount of 0.8 to 0.2 equivalents, and preferably 0.7 to 0.45 equivalents, per 1 equivalent of opoxide of the polyepoxy compound 1); and 3) an acidic polyester containing carbocyclic or heterocyclic rings, of the formula **(See formula)** in an amount of 0.2 to 0.6 equivalents, and preferably 0.3 to 0.55 equivalents, per 1 equivalent of opoxide of the polyopoxy compound 1); it being understood that in the formula above the symbols R1 and R2 of the recurring structural element mean bivalent aliphatic, araliphatic, cycloaliphatic, cycloaliphatic-aliphatic, aromatic or heterocyclic radicals, and at least one of them must contain a carbocyclic or heterocyclic ring or ring system ; n means an integer valued from 2 to 10, and preferably from 2 to 5; and in the recurring structural element of the formula **(See formula)** the Zg/Zr ratio has the value from 2 to 13, and preferably from 4 to 10, and in the Zg it means the total number of members in the linear chain of the structural element while Zr means the number of the members of the structural element consisting of a ring or ring system, the members mentioned first being taken from the following group **(See formula)** (where R3 and R4 each signify an alkyl or alkenyl group) and alicyclic, heterocyclic and aromatic rings (or condensed or ringed ring systems); but ring systems in which two rings are linked by a common spiro-carbon atom must be counted as two cyclic members. (Machine-translation by Google Translate, not legally binding)