One-shot polyurethane elastomers with very low compression sets

Details One-shot polyurethane elastomers with very low compression sets One-shot polyurethane elastomers with very low compression sets

C - Chemistry, Metallurgy

08

G

C08G 18/76 (2006.01) C08G 18/10 (2006.01) C08G 18/65 (2006.01)

Patent

CA 2327700

This invention relates to a process for the production of polyurethane elastomers having low compression sets. The process comprises reacting A) an isocyanate component comprising methylene bis(phenyl isocyanate) containing the 2,4'-isomer of methylene bis(phenyl isocyanate), with B) an isocyanate-reactive component, optionally, in the presence of C) one or more additives. The reaction components are processed via the one-shot process at an isocyanate index of 90 to 130.

Cette invention concerne un procédé de production d'élastomères de polyuréthanne présentant des ensembles à faible compression. Le procédé consiste à faire réagir A) un composant isocyanate comprenant le méthylène bis(phényl isocyanate ) contenant du 2,4 '-isomère de méthylène bis(phényl isocyanate ), avec B) un composant réagissant avec l'isocyanate, éventuellement en présence de C) un ou plusieurs additifs. Les composants de réaction sont traités par l'intermédiaire du procédé en une seule phase à un indice d'isocyanate de 90 à 130.

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