Waterborne polyurethane elastomer

Abstract

The invention discloses a waterborne polyurethane elastomer. The waterborne polyurethane elastomer comprises, by weight, 20 parts of ethylene glycol, 10 parts of tripropylene glycol, 5 parts of 2-n-amylpropane-1,3-diol, 30 parts of isocyanate, 2 parts of 1,1-dimethyl-silanol 1-acetate, 5 parts of methyl isocyanate, 5 parts of propylene isocyanate, 3 parts of methyl 2,3-diethyl-1-( trimethyl silicyl)-2-cyclopropene-1-carboxylic ester, 30 parts of acrylate, 5 parts of modified molecular sieve, 5 parts of hydrophilic chain extender, 5 parts of enhancer, 2 parts of defoaming agent and 2 parts of leveling agent. By the arrangement, the mechanical performance of the whole waterborne polyurethane elastomer can be kept in a good state under a large day and night temperature difference.

Description

technical field [0001] The invention relates to a polymer material, more specifically to a water-based polyurethane elastomer. Background technique [0002] Polyurethane is a kind of polymer whose main chain contains -NHCOO-repeating structural units. The English abbreviation is PU, including rigid polyurethane plastics, soft polyurethane plastics, polyurethane elastomers and other forms, and is divided into two categories: thermoplastic and thermosetting. Its raw materials are generally presented in the state of resin. [0003] Due to the strong polar carbamate group, insoluble in non-polar groups, it has good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide temperature range (-50 to 150°C) can be prepared with different raw materials, which is very suitable for elastomers. [0004] In some fields, it is necessary to use the mechanical properties of polyurethane, especially water-based polyurethane. In some special o...

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Problems solved by technology

[0004] In some fields, it is necessary to use the mechanical properties of polyurethane, especially water-based polyurethane. In some special occasions, such as the use of polyurethane in areas with large temperature differences between day and night, it will often cause the problem of a significant decline in the mechanical properties of polyurethane.