Water-based polyurethane composite adhesive for tanning and preparation method and application of composite adhesive

A water-based technology for water-based polyurethane and leather making, which is used in polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc. Improve molecular weight and strength, good solvent resistance

Inactive Publication Date: 2012-08-01
江阴市诺科生物新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of water-based polyurethane composite glue for tanning and its preparation method and application at the above-mentioned deficiencies. The present invention prepares cross-linked water-based polyurethane by adopting polyester, cross-linking agent, etc. to obtain a body-shaped polymer, and further It is used in combination with curing agent, wetting agent, tackifier, adsorbent, thickener, and defoamer to complement each other's advantages. It overcomes the problem that the performance of a single resin cannot fully meet the requirements of use, and the water-based polyurethane for tanning is prepared. The composite adhesive has high adhesion fastness, good water resistance and solvent resistance, and can be used for knife coating and roller coating of artificial leather and synthetic leather intermediate layer binders in the fields of textile and leather processing.

Method used

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  • Water-based polyurethane composite adhesive for tanning and preparation method and application of composite adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0073] Example 1: Weigh 26.1 kg of toluene diisocyanate and 100 kg of poly(1,4-butylene adipate) diol with a molecular weight of 2000, add it to the reaction kettle, and react at a constant temperature of 85°C for 1 hour, then add dimethylol propionic acid 4 kg, react at a constant temperature of 90°C for 1 hour, finally add 5.4 kg of diethylene glycol, 0.45 kg of trimethylolpropane, 0.3 kg each of dibutyltin dilaurate and stannous octoate, 60 kg of acetone, and react at a constant temperature of 70°C for 2 Hours later, cool down to 50°C and discharge to obtain a prepolymer, pour the prepolymer into a high-speed shear disperser, pour 3 kg of triethylamine under the condition of 800 rpm, react for 1 minute, and then pour Add 1300 kg of water and stir for 2 minutes to obtain a white emulsion. Distill the obtained emulsion under the conditions of 25°C and -0.08Mpa under reduced pressure to remove the solvent acetone, and obtain a water-based polyurethane emulsion for tanning wi...

Embodiment 2

[0074] Example 2: Weigh 87 kg of toluene diisocyanate, 100 kg of poly(1,4-butylene adipate) diol with a molecular weight of 2000, add it to the reaction kettle, and react at a constant temperature of 60°C for 3 hours, then add dimethylol propionic acid for 15 1 kg, constant temperature reaction at 85°C for 1 hour, finally add 28 kg of diethylene glycol, 2.2 kg of trimethylolpropane, 0.12 kg of dibutyltin dilaurate, 0.12 kg of stannous octoate, 00 kg of acetone, 100 kg of methyl acetate After reacting at a constant temperature of 50°C for 5 hours, the temperature was lowered to 20°C and the material was discharged to obtain a prepolymer. The prepolymer was poured into a high-speed shear disperser, and 11 kg of triethylamine was poured under the condition of 800 rpm. React for 1 minute, then pour 240 kg of water into it, and stir for 2 minutes to obtain a white emulsion. Distill the obtained emulsion under the conditions of 25°C and -0.08Mpa under reduced pressure to remove th...

Embodiment 3

[0075] Example 3: Weigh 43.5 kg of toluene diisocyanate, 100 kg of poly(1,4-butylene adipate) diol with a molecular weight of 2000, add it to the reaction kettle, react at a constant temperature of 85°C for 2 hours, and then add dimethylol butyric acid 8 kg, 85°C constant temperature reaction for 1.5 hours, finally added 11 kg of diethylene glycol, 0.9 kg of trimethylolpropane, 0.25 kg each of dibutyltin dilaurate and stannous octoate, 100 kg of N-methylpyrrolidone, 60 After reacting at a constant temperature of ℃ for 4 hours, the temperature was lowered to 30 ℃ and the material was discharged to obtain a prepolymer. The prepolymer was poured into a high-speed shear disperser, and 6 kg of triethylamine was poured into it under the condition of 1000 rpm, and the reaction was 1 Minutes, then pour 380 kg of water and stir for 2 minutes to obtain a white emulsion, and obtain a water-based polyurethane emulsion for tanning with a solid content of about 30%.

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Abstract

The invention discloses water-based polyurethane composite adhesive for tanning and a preparation method and application of the composite adhesive, belongs to the technical field of water-based polyurethane composite adhesive preparation methods, and in particular relates to a method for preparing composite adhesive in the fields of artificial leather and synthetic leather. The method for preparing the water-based polyurethane composite adhesive for tanning is characterized by comprising the following steps of: reacting polyol polymer and isocyanate, adding chain extender, hydrophilic chain extender, cross linker, catalyst and solvent, reacting, cooling and emulsifying, to obtain emulsion; and mixing the emulsion, curing agent, wetting agent, tackifier, adsorbent and thickening agent uniformly, and thus obtaining the hot-melt adhesive for artificial leather adhesive layers. The water-based polyurethane composite adhesive for tanning is used for compounding polyvinyl chloride (PVC) / cloth for artificial leather of luggage and clothes. The prepared water-based polyurethane composite adhesive for tanning has high adhesive fastness and good water and solvent resistance, and can be applied to processes of knife coating, roll coating and the like of binding materials of middle layers of artificial leather and synthetic leather in the fields of textiles, leather processing and the like.

Description

technical field [0001] The invention discloses a water-based polyurethane composite glue for tanning and its preparation method and application, which belong to the technical field of preparation methods of water-based polyurethane composite glue, and in particular relate to a preparation method of composite glue in the field of artificial leather and synthetic leather. Background technique [0002] At present, in the production process of the domestic leather industry, most of them use solvent-based polyurethane resin as the basic raw material for the base layer, surface layer and adhesive layer. A large amount of solvent enters the environment, causing serious harm to the operator's body and affecting safety Production poses a serious threat and is extremely harmful to the environment. According to the technical development trend of my country's leather products, leather products can only meet the requirements of future development if they develop in the direction of envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J11/04C09J11/06C09J11/08C08G18/66C08G18/42C08G18/67D06N3/08B32B27/12B32B27/30
Inventor 华明扬华伽杰
Owner 江阴市诺科生物新材料科技有限公司
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