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Polyurethane foam resin and preparation method thereof

A technology of foaming resin and polyurethane, which is applied in the field of polyurethane foaming resin, can solve the problems of unsuitable treatment of water-based materials, synthetic leather, high cost of foaming resin, and potential safety hazards, etc., and achieve excellent hand feeling and comprehensive effect, and good adhesion , good breathability and moisture permeability

Inactive Publication Date: 2014-12-24
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In the synthesis process of solvent-based foaming resin, organic solvents such as DMF / toluene must be used, which poses safety hazards and causes environmental pollution;
[0005] 2. The cost of foaming resin is relatively high;
[0006] 3. Not suitable for synthetic leather produced by water-based materials

Method used

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  • Polyurethane foam resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: waterborne polyurethane resin

[0044] Add 85g polyester diol (number average molecular weight 2000), 65g polytetrahydrofuran diol (number average molecular weight 1000), 42g toluene diisocyanate, 0.01g stannous octoate into the reaction vessel, and react under mechanical stirring at 60°C 3h; Dissolve 9.8g of dimethylolpropionic acid and 5.2g of trimethylolpropane in 15g of NMP, add to the mixture, and react at 70°C for 4h; cool down to 30°C, add 8g of triethylamine, 20g of acetone, and stir for 40min; Under high-speed stirring, 200 g of deionized water was added to the above reaction solution, and mechanically stirred for 50 min to form a dispersion. The solvent was then removed by distillation under reduced pressure. A milky white dispersion with a solids content of 49.8% was obtained.

Embodiment 2

[0045] Embodiment 2: waterborne polyurethane resin

[0046] Add 110g polyadipate type polyester diol (number average molecular weight 1000), 65g isophorone diisocyanate, 0.04g dibutyltin dilaurate into the reaction vessel, and react at 75°C for 1.5h under mechanical stirring ;Dissolve 10.5g dimethylolpropionic acid, 6g trimethylolpropane, 3g1,4-butanediol in 18g NMP, add to the mixture, react at 85°C for 2h; cool down to 40°C, add 8g triethylamine, 22g of acetone, stirred for 30min; under high-speed stirring, 200g of deionized water was added to the above reaction solution, and mechanically stirred for 45min to form a dispersion. The solvent was then removed by distillation under reduced pressure. A milky white dispersion with a solids content of 52% was obtained.

Embodiment 3

[0047] Embodiment 3: waterborne polyurethane resin

[0048] Add 250g polycarbonate diol (number average molecular weight 2000), 65g diphenylmethane diisocyanate, 0.06g organic bismuth into the reaction vessel, and react at 85°C for 2h under mechanical stirring; 8.5g dimethylol Dissolve propionic acid, 3.8g trimethylolpropane, 3g neopentyl glycol in 23g NMP, add to the mixture, react at 80°C for 3h; cool down to 50°C, add 6.4g triethylamine, 20g acetone, stir for 40min; Under stirring, 270 g of deionized water was added to the above reaction liquid, and mechanically stirred for 1 h to form a dispersion. The solvent was then removed by distillation under reduced pressure. A milky white dispersion with a solids content of 55% was obtained.

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Abstract

The invention provides polyurethane foam resin which is mainly used for a post-treatment process of split leather and synthetic leather. The resin is a foam material prepared by uniformly mixing the following raw materials in parts by weight: 1-5 parts of a foaming assistant, 1-5 parts of a foam stabilizing assistant, 0-5 parts of a cationic coagulant, 0-10 parts of a cross-linking agent, 0.2-5 parts of a thickener, 0-6 parts of waterborne coloring paste and 100 parts of waterborne anionic polyurethane paste. The prepared foam resin overcomes the shortcomings of solvent type foam resin, adopts water as a solvent, and is environment-friendly and pollution-free; a leather product prepared from the foam resin is good in adhesion property, excellent in hand feel and comprehensive effect and good in air and water vapor permeability.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a polyurethane foaming resin. Background technique [0002] The traditional synthetic leather industry generally uses solvent-based PU resin as the surface layer and base material for the production of synthetic leather. Traditional solvent-based polyurethane adhesives and coating products use a large amount of organic solvents, such as dimethylformamide, toluene, xylene, acetone, methyl ethyl ketone, etc. It not only causes pollution to the environment, but also causes damage to the health of workers in related industries, and is flammable and explosive, which can easily cause fire accidents. And the use of organic solvents causes a lot of waste of resources. With the acceleration of market internationalization and the strengthening of people's awareness of environmental protection, these issues have aroused widespread concern in society. [0003] In the prior art, foaming re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08J3/24C08L75/06C08L75/08C08G18/76C08G18/75C08G18/66C08G18/44D06N3/14
Inventor 刘娅林黄凯孙海园刘文峰马金明闫克辉陈建栋于福哲王铁森苗吉宾
Owner SHANDONG TIANQING TECH DEV
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