- Environment-friendly polyurethane chain extender as well as preparation method and application thereof
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The invention relates to an environment-friendly polyurethane chain extender as well as a preparation method and application thereof, and belongs to the technical field of chemical materials. The compound is represented by the following formula I, wherein R1 is a straight chain or branched chain alkyl group consisting of C1-C6; and R2 is a straight chain or branched chain alkyl group consisting ofC1-C6. The environment-friendly polyurethane chain extender disclosed by the invention is applied to the preparation of a two-component polyurethane coating or adhesive. The environment-friendly chain extender has the beneficial effects that (1) the environment-friendly chain extender is a dibasic alcohol polyurethane chain extender containing carbamate, and the structure of the chain extender does not contain any aromatic group, so that the toxicity of the chain extender is greatly reduced; (2) relatively long operation time of the chain extender and the polyurethane material after mixing isensured; (3) the chain extender is high in strength and good in weather resistance after being cured, so that the performance of a polyurethane product can be improved, the application of the polyurethane product is enriched, and the diversified requirements of people on a polyurethane material are met.
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Paragraph 0028-0038
(2020/04/22)
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- Carbamate multi (methyl) acrylate as well as preparation method and application thereof (by machine translation)
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The preparation method comprises the following steps (: reacting a cyclic carbonate with an organic amine to obtain the carbamate poly)-acrylic acid ester :S1. and reacting the cyclic carbonate with the organic amine, to prepare the radiation-curable urethane polyol ;S2. by catalyzing the ester exchange reaction or the esterification reaction (to prepare the radiation-curable urethane polymethacrylate) and the organic amine to prepare the urethane polyol (through catalyzing the transesterification reaction or the esterification reaction) to obtain the urethane polyalphamethyl (-acrylic acid ester, respectively). The preparation method comprises the following steps: catalyzing the ester exchange reaction or (the esterification reaction to obtain the carbamate polyalphamethyl-). acrylate; and, synthesizing, methyl, acrylic acid, The, preparation method comprises, the following steps: catalyzing the ester exchange reaction or the esterification reaction to obtain the carbamate polyol. (by machine translation)
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Paragraph 0037-0040
(2020/05/05)
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