Elastomeric materials having a high hardblock content and...

C - Chemistry – Metallurgy – 08 – G

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C08G 18/28 (2006.01) C08G 18/24 (2006.01) C08G 18/30 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08G 18/76 (2006.01) C08G 18/79 (2006.01) C08J 9/00 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2712054

Elastomeric material having a density of more than 100 kg/m3 and comprising - a matrix material comprising a plurality of urethane, urea and/or isocyanurate groups and having a hardblock content of more than 50 % (hereinafter called matrix A); and - a polymeric material which 1) has no groups which are able to form a urethane, urea or isocyanurate group with an isocyanate group, 2) is interpenetrating said matrix A, and 3) is the reaction product of a polyisocyanate and a polymer having an average molecular weight of more than 500 and one isocyanate -reactive group at an isocyanate index of 100-250 (hereinafter called polymeric material B); and wherein the relative amount of all ingredients used to make said matrix A and of said polymeric material B, on a weight basis, ranges from 10:90 to 90:10 and process for making such materials.

La présente invention concerne un matériau élastomérique ayant une sensité supérieure à 100 kg/m3 comportant : un matériau matriciel comprenant une pluralité de groupes uréthannes, urée et/ou isocyanurates et ayant une teneur en blocs durs supérieure à 50% (désigné ci-dessous matrice A) ; et un matériau polymère qui 1) ne contient pas de groupes qui sont capables de former un groupe uréthanne, urée ou isocyanurate avec un groupe isocyanate, 2) peut sinterpénétrer avec ladite matrice A, et 3) est un produit réactionnel dun polyisocyanate et dun polymère ayant un poids moléculaire moyen supérieur à 500 et dun groupe réactif à lisocyanate à un indice disocyanate entre 100 et 250 (désigné ci-dessous matériau B). La quantité relative de tous les ingrédients utilisés pour réaliser ladite matrice A et dudit matériau polymère B, en rapport pondéral, est comprise entre 10:90 et 90:10 ainsi quun procédé permettant la fabrication de tels matériaux.

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