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Application of sec-butyl acetate as solvent in production of synthetic leather

A technology for the production of synthetic leather from sec-butyl acetate, which is used in textiles and papermaking, etc.

Inactive Publication Date: 2013-05-15
胡先念
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the influence of surfactant selection on the performance of synthetic leather products has been ignored in the prior art, and the selection of ideal surfactants to improve the performance and appearance of synthetic leather products is also a direction that needs to be improved in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Production of synthetic leather by wet process using sec-butyl acetate as solvent

[0037] First add 60 parts by weight of sec-butyl acetate to the container, add 10 parts by weight of wood powder, fully mix with a mixer for about 10 minutes, then add 100 parts by weight of wet-process polyurethane, 5 parts by weight of color paste (orange yellow PU wet-process color paste, Hangzhou Zhongfucai New Chemical Materials Co., Ltd. provides), 1 weight part of anionic surfactant C-70 (Dow Chemical Company) and 0.5 weight part of nonionic surfactant S-80 (Span80), utilize vacuum defoamer degassing 40min , and finally filter with a 60-100 mesh filter.

[0038] Convey the base cloth (raised cloth), pass through the cloth storage rack and enter the immersion tank, then squeeze out the water in the base cloth with the squeeze roller, and iron the base cloth to half dry through the ironing wheel.

[0039] The treated base cloth passes through the coating table, and the slurry mixtu...

Embodiment 2

[0046] Production of synthetic leather by wet impregnation using sec-butyl acetate as solvent

[0047] Add 150 parts by weight of sec-butyl acetate in the mixing tank, then add 10 parts by weight of wood powder, and stir to disperse the wood powder in sec-butyl acetate, stop stirring, and add 1 part by weight of anionic surfactant C-70 , 0.5 parts by weight of nonionic surfactant S-80, 0.5 parts by weight of defoamer (random copolymer defoamer WK sold by Bayer), 0.08 parts by weight of leveling agent (1115 sold by Bayer), and continue to stir After 5 minutes, add 100 parts by weight of polyurethane resin and 15 parts by weight of coloring agent, stir at high speed for about 20 minutes, and vacuum defoaming at the same time. The prepared slurry is pumped into the impregnation tank with an air pump, the base cloth is unrolled, and the water in the base cloth is removed by heating with an ironing roller before dipping into the impregnation tank. The base cloth is put into the im...

Embodiment 3

[0052] Production of synthetic leather by dry process using sec-butyl acetate as solvent

[0053] Prepare polyurethane resin slurry with 100 parts by weight of polyurethane resin, 60 parts by weight of sec-butyl acetate and 8 parts by weight of colorant. Choose a flat release paper with certain peel strength, solvent resistance, flexibility, and high temperature resistance as the release paper. Unwind the release paper, apply polyurethane slurry on the release paper, dry and cool, then apply polyurethane resin slurry again, dry and cool, then apply polyurethane resin slurry for the third time, pre-dry and semi-dry , and then laminated with the base cloth, dried and cooled, separated from the paper and leather, and rolled up for artificial leather and release paper. The synthetic leather has excellent color, smooth surface, and no defects such as pinholes, orange peel, and surface depressions.

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PUM

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Abstract

The invention relates to an application of sec-butyl acetate as a solvent in production of synthetic leather, in particular to an application of polyurethane synthetic leather. The invention further discloses a polyurethane resin pulp used in production of synthetic leather via a dry process and a wet process and taking sec-butyl acetate as the solvent; the sec-butyl acetate is used as the solvent in the production of synthetic leather via the dry process and the wet process, so that the defects of needle holes, orange peel and surface indentation and the like can be reduced; and the performance and the appearance of the product are further improved by selecting the suitable composition of a non-ionic surface active agent and an anion active agent.

Description

technical field [0001] The invention relates to the use of sec-butyl acetate as a solvent for the production of synthetic leather. In addition, the present invention also relates to a polyurethane resin slurry for dry or wet production of synthetic leather containing sec-butyl acetate as a solvent. Background technique [0002] At present, the production of synthetic leather includes wet method and dry method. The wet method mainly uses DMF solvent, and the dry method mainly uses toluene, DMF, MEK and other solvents. The amount of solvent used in the two processes reaches about 60% of the amount of resin used. In the wet process, the solvent loss is about 15%; in the dry process, the solvent loss is about 95%. [0003] The production method of wet-process polyurethane synthetic leather is to add DMF solvent and other fillers and additives to polyurethane wet-process resin to make a mixed solution. (DMF) has affinity, and the water that is not compatible with polyurethane ...

Claims

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Application Information

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IPC IPC(8): D06N3/00D06N3/14C08L75/04C08L97/02
Inventor 胡先念李华叶文
Owner 胡先念
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