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A water-based polyurethane and composite modification technology, which is applied in textiles and papermaking, can solve the problems of comparable comprehensive performance, performance reduction, and small molecular weight, and achieve the effects of improving kneading resistance, improving elasticity, and increasing crosslinking density
Inactive Publication Date: 2018-08-31
JIANGXI MINGCHUAN SCI & TECH IND
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[0003] However, due to the small molecular weight of water-based polyurethane and the presence of hydrophilic ionic groups in its molecular chain, its comprehensive performance is still not comparable to that of solvent-based polyurethane, which limits its use in special occasions. Therefore, domestic and foreign experts have proposed different improvements. Sexual means, improve the comprehensive performance of water-based polyurethane emulsion, expand the application field of water-based polyurethane emulsion, such as silicone modification, epoxy resin modification, acrylate modification, organic fluorine modification, etc., although its modified emulsion improves water-based Polyurethane emulsions are deficient in certain properties, but most of the single modified waterborne polyurethanes will also cause performance reduction in other aspects
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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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Embodiment 1
[0036] A water-based polyurethane emulsion, comprising the following raw material components:
[0037] 100 parts of isophorone diisocyanate, 250 parts of polytetrahydrofuran diol, 16 parts of 1,4-butanediol, 6 parts of water-based epoxy resin emulsion (WS-500, purchased from Xinhua New Material Technology Co., Ltd.), 3 3 parts of methylolpropane, 8 parts of polyorganosiloxane (BT-200 dimethyl silicone oil, purchased from Guangzhou Batai Chemical Co., Ltd.), 15 parts of 2,2-dimethylolpropionic acid, 13 parts of triethylamine parts, 80 parts of dimethylformamide, and 700 parts of deionized water.
Embodiment 2
[0039] A water-based polyurethane emulsion, comprising the following raw material components:
[0040] 100 parts of isophorone diisocyanate, 220 parts of polytetrahydrofuran diol, 14 parts of 1,4-butanediol, 5 parts of water-based epoxy resin emulsion (WS-500, purchased from Xinhua New Material Technology Co., Ltd.), 3 2 parts of methylolpropane, 6 parts of polyorganosiloxane (BT-200 dimethyl silicone oil, purchased from Guangzhou Batai Chemical Co., Ltd.), 12 parts of 2,2-dimethylolpropionic acid, 12 parts of triethylamine parts, 60 parts of dimethylformamide, and 500 parts of deionized water.
Embodiment 3
[0042] A water-based polyurethane emulsion, comprising the following raw material components:
[0043]100 parts of isophorone diisocyanate, 280 parts of polytetrahydrofuran diol, 18 parts of 1,4-butanediol, 8 parts of water-based epoxy resin emulsion (WS-500, purchased from Xinhua New Material Technology Co., Ltd.), 3 5 parts of methylol propane, 9 parts of polyorganosiloxane (BT-200 dimethyl silicone oil, purchased from Guangzhou Batai Chemical Co., Ltd.), 16 parts of 2,2-dimethylolpropionic acid, 15 parts of triethylamine parts, 90 parts of dimethylformamide, and 800 parts of deionized water.
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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Abstract
The invention belongs to the technology of synthetic leather materials and the field of manufacturing of synthetic leather and particularly relates to composite modified waterborne polyurethane synthetic leather. The waterborne polyurethane synthetic leather comprises modified waterborne polyurethane emulsion which is used as a composition component of slurry of a base layer and a surface layer; the waterborne polyurethane emulsion comprises 100 parts of diisocyanate, 200-300 parts of polyether or polyester polyol, 12-20 parts of alcohol chain extender, 3-10 parts of waterborne epoxy resin emulsion, 1-5 parts of crosslinking agent, 5-10 parts of organopolysiloxane, 8-20 parts of hydrophilc agent, 10-20 parts of neutralizer, 50-100 parts of solvent and 400-1,000 parts of deionized water. According to the composite modified waterborne polyurethane synthetic leather, with the waterborne epoxy resin emulsion as the crosslinking agent, by adding organopolysiloxane, the formed waterborne polyurethane emulsion has a three-dimensional grid structure, and the elasticity of the waterborne polyurethane emulsion is improved; secondly, for the formation of the grid-shaped structure, by improving connection strength among adjacent molecules, the surface strength of the formed waterborne polyurethane synthetic leather product is improved.
Description
technical field [0001] The invention belongs to the field of synthetic leather material technology and synthetic leather manufacture, and in particular relates to a composite modified water-based polyurethane synthetic leather. Background technique [0002] As an excellent film-forming material, water-based polyurethane has been continuously recognized for its excellent moisture permeability, excellent wear resistance, scratch resistance and unparalleled low-temperature softness, and has been applied in leather and textile coatings. Fully applied. Compared with polyurethane resin using organic solvents as the base layer and surface layer of synthetic leather products, water-based polyurethane eliminates the pollution of polyurethane synthetic leather industry from the source. [0003] However, due to the small molecular weight of water-based polyurethane and the presence of hydrophilic ionic groups in its molecular chain, its comprehensive performance is still not comparabl...
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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