Melt-processable polyurethanes containing special wax mixtures

Details Melt-processable polyurethanes containing special wax mixtures Melt-processable polyurethanes containing special wax mixtures

C - Chemistry, Metallurgy

08

L

C08L 75/04 (2006.01) C08K 5/10 (2006.01) C08K 5/20 (2006.01) C08L 91/06 (2006.01)

Patent

CA 2221895

A thermoplastic molding composition comprising a thermoplastic polyurethane and a wax mixture is disclosed. The polyurethane is a product of an organic diisocyanate, a linear, hydroxyl-terminated polyol and a diol or diamine chain extender. The waxmixture contains a first mixture of an ester of a C10-45 aliphatic carboxylic acid and a diol, and an alkali metal or alkaline earth metal salt of a C10-45 aliphatic carboxylic acids, and at least one member selected from the group consisting of fatty acid ester, fatty acid amide, fatty acid ester amide and polyethylene wax.

On divulgue une composition thermoplastique à mouler comprenant un polyuréthane thermoplastique et un mélange de cire. Le polyuréthane est le produit d'un diisocyanate organique, d'un polyol linéaire terminé par un hydroxyle et d'un allongeur de chaîne qui est un diol ou une diamine. Le mélange de cire contient un premier mélange d'un ester d'un acide carboxylique aliphatique en C10-C45 et d'un diol, et d'un sel de métal alcalin ou alcalino-terreux d'un acide carboxylique aliphatique en C10-C45, et d'au moins un constituant choisi parmi le groupe constitué d'un ester d'acide gras, d'un amide d'acide gras, d'un ester-amide d'acide gras et d'une cire de polyéthylène.

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