Polyurethane resin for bright oil leather synthetic leather and preparation method thereof
A polyurethane resin and synthetic leather technology, applied in textiles and papermaking, etc., can solve the problem that synthetic leather treatment agents cannot meet the aesthetic requirements of consumers for hand feeling and appearance, and achieve strong slippery touch, oily and bright feeling, The effect of stable performance
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Embodiment 1
[0032] A polyurethane resin specially used for bright oil leather synthetic leather, which is made of the following components in weight percentage: 10% polyester polyol, 17% isocyanate, 2% small molecule diol with a molecular weight below 150, and a chain extension modifier 4%, acrylic acid end-capping agent 1%, solvent 65%, antioxidant 0.1%, catalyst 0.05%, high temperature resistance additive 0.1%, nano powder additive 0.75%.
[0033] In this embodiment: the polyester polyol is polyethylene adipate-1,4-butylene glycol ester diol, and the number average mass is 700-1500 g / mol. It can be used in poly(1,3-butylene adipate diol), poly(1,4-butylene adipate) diol, poly(hexanediol adipate) diol (commercially available) according to the actual situation One or more mixtures of polyethylene adipate glycol-1,4-butylene glycol ester diol, and the number average mass is 700-1500g / mol.
[0034] In this embodiment: the small molecule diol with a molecular weight below 150 is 1,6-hexaned...
Embodiment 2
[0045] A kind of polyurethane resin specially used for bright oil leather synthetic leather, which is made of the following components in weight percentage: 8% polyester polyol, 20% isocyanate, 3.4% small molecule diol with molecular weight below 150, chain extension modifier 3%, acrylic acid end-capping agent 1.6%, solvent 62%, antioxidant 0.1%, catalyst 0.05%, high temperature resistance additive 0.3%, nano powder additive 1.55%.
[0046] In the formula of this embodiment, the polyester polyol is polyethylene adipate-1,4-butanediol and polyadipate-1,3-butanediol according to the weight of 1:1 The ratio of the composition of the mixture, the number average mass of the polyester polyol is 700-1500g / mol. Small molecule diols with a molecular weight below 150 are a mixture of 1,3-butanediol and 1,4-butanediol in a weight ratio of 1:1. The chain extension modifier is a mixture of castor oil and tung oil in a mass ratio of 3:1. The solvent is a mixture of N,N-dimethylformamide a...
Embodiment 3
[0055] A polyurethane resin specially used for bright oil leather synthetic leather, which is made of the following components in weight percentage: 15% polyester polyol, 15% isocyanate, 2% small molecule diol with a molecular weight below 150, and a chain extension modifier 4.2%, acrylic acid end-capping agent 1.5%, solvent 60%, antioxidant 0.1%, catalyst 0.05%, high temperature resistance additive 0.8%, nano powder additive 1.35%.
[0056] In the formula of this example, the dosages of 0.8% of high temperature resistant additive and 1.35% of nano powder additive are interchangeable, becoming 0.8% of high temperature resistant additive and 1.35% of wetting and dispersing additive.
[0057] In the formulation of this embodiment, the polyester polyol is polyhexamethylene adipate diol, and the number-average mass of the polyester polyol is 700-1500 g / mol. The small molecule diol with a molecular weight below 150 is 1,4-butanediol, the chain extension modifier is a mixture of cas...
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