Preparation method of solventless ultraviolet-curing polyurethane for synthetic leather

A solvent-free, UV-light technology, applied in coatings, textiles, and papermaking, can solve solvent pollution and other problems, and achieve the effects of no pollution, convenient operation, and stable process
CN103483536AActive Publication Date: 2014-01-01SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2014-01-01
Patent Text Reader

Abstract

The invention relates to a preparation method of a solventless ultraviolet-curing polyurethane for synthetic leather, which comprises the following steps: putting 100 parts by weight of vacuum-dehydrated dibasic alcohol and 20-40 parts by weight of liquid isocyanate with two -N=C=O functional groups into a reactor in a nitrogen protective atmosphere, uniformly mixing, adding 15-30 parts by weight of hydroxy acrylic acid monomer and 0.1-0.3 part by weight of catalyst, reacting at 75-85 DEG C for 40-60 minutes, cooling the obtained reaction system, adding 0.05-0.15 part by weight of photoinitiator, and stirring uniformly to obtain the solventless ultraviolet-curing polyurethane. When the polyurethane is used for producing synthetic leather, the coating can be cured under ultraviolet irradiation, can eliminate solvent contamination in the traditional synthetic leather production process, and has the characteristics of energy saving and high efficiency.
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Description

Technical field

[0001] The invention belongs to the technical field of polyurethane synthetic leather, and particularly relates to a preparation method of solvent-free ultraviolet light curing polyurethane for synthetic leather. Background technique

[0002] Polyurethane synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. Usually a non-woven fabric is used to simulate a mesh layer, and a foamed polyurethane coating is used to simulate a grain layer. The obtained synthetic leather is very similar to leather on the front and back, and has certain air permeability, which is closer to natural leather than ordinary artificial leather. It is widely used in making shoes, boots, bags and balls.

[0003] At present, the production of polyurethane synthetic leather uses solvent-based polyurethane. A large amount of solvents such as dimethylformamide, toluene and methyl ethyl ketone are...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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