A kind of polyurethane resin for impregnating superfine fiber with high moisture permeability and preparation method thereof
A polyurethane resin, microfiber technology, applied in textiles and papermaking, etc., can solve problems such as poor moisture permeability
Active Publication Date: 2015-09-30
山东众兴泽辉新材料股份有限公司
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Problems solved by technology
In the preparation of waterproof and breathable synthetic leather, the first coating materials used are acrylic and polyurethane series. Although the coated synthetic leather has excellent waterproof and certain windproof properties, its moisture permeability is very poor.
Method used
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Embodiment 1
[0033] Example 1: Add 250g of oxalic acid polyester, 350g of polyoxypropylene glycol, 600g of N,N-dimethylformamide, and 70g of isocyanate into the reaction kettle according to the recipe, at a temperature of 70-80°C, at room temperature React for 3-5 hours to obtain a prepolymer;
[0034] Chain extension reaction: Add 60g of 1,4-butanediol to the above prepolymer for chain extension reaction. The temperature of the chain extension reaction is 70-80°C, and it is carried out under normal pressure. The chain extension reaction takes 6-8 hours Finally, 40 g of chain terminator methanol was added to terminate the reaction, and the polyurethane resin for impregnating the high moisture-permeable ultrafine fibers was obtained by filtration.
[0035] The polyurethane resin impregnated with the above-mentioned high moisture-permeable microfibers obtained above is coated on a cotton cheesecloth with a fiber specification of 83.3tex×83.3tex, a warp density of 157 per centimeter, and a we...
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The invention discloses a preparation method of polyurethane resin for impregnating superfine fiber with high moisture penetrability. The preparation method comprises the following steps of adding adipic acid polyester, polyoxypropylene diol, N, N-dimethyl formamide and isocyanate into a reaction kettle according to a formula, and reacting at the normal temperature of 70-80 DEG C for 3-5h to obtain a prepolymer; and adding 1, 4-butanediol into the prepolymer according to the formula ratio to carry out chain extension reaction at the temperature of 70-80 DEG C and normal pressure, after 6-8h since the chain extension reaction is ended, adding a chain terminating agent methanol for ending the reaction, filtering to obtain the polyurethane resin for impregnating a superfine fiber with high moisture penetrability, coating the prepared polyurethane resin for impregnating the superfine fiber with high moisture penetrability on all-cotton madrapa, and drying and forming by using a high-low-high temperature drying mode, i.e., a mode for drying from the high temperature of 100 DEG C to the lower temperature of 80 DEG C and then drying from the low temperature of 80 DEG C to the high temperature of 100 DEG C to obtain PU (Poly Urethane) transfer coating waterproof and moisture permeable synthetic leather with the moisture permeability of 3125 (Y) / (g.m-2.24h / 1).
Description
technical field [0001] The invention relates to a novel textile material, in particular to a polyurethane resin with high moisture permeability for impregnating superfine fibers and a preparation method thereof. Background technique [0002] Usually wet polyurethane bass has a certain degree of air permeability, but after surface coating, the moisture permeability is greatly reduced. Coating products can be waterproof and moisture-permeable, which seems contradictory on the surface, but through the continuous efforts of researchers, great breakthroughs have been made in the past 20 years. It is a unique functional material that is constantly developing in the fields of textile and chemical industry in the world. In the 1950s, Japan adopted physical and chemical methods of discharge perforation to produce moisture-permeable PVC leather. In terms of coating preparation of waterproof and breathable synthetic leather, the first coating materials used are acrylic and polyuretha...
Claims
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IPC IPC(8): D06N3/14C08G18/66C08G18/42C08G18/48C08G18/12
Inventor 王彦波蓸国荣于正湖
Owner 山东众兴泽辉新材料股份有限公司