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Waterborne polyurethane for base cloth printing impregnation and preparation method thereof

A technology of water-based polyurethane and base fabric, which is applied in the direction of light-resistant fibers, textiles, papermaking, and fiber treatment. It can solve the problems of increasing the pressure of manufacturers' environmental protection management, reducing the pressure of manufacturers' environmental protection management, and the uneven amount of base fabrics. The effect of enterprise profit, reduction of equipment investment, and small environmental pollution

Inactive Publication Date: 2020-03-24
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many kinds of solvent-based impregnated resins on the market, but as people pay more and more attention to environmental protection, solvent-based impregnated resins will generally use solvent DMF in the production process, which will easily cause environmental pollution and increase the environmental protection pressure of manufacturers. In order to meet the requirements of environmental protection, a water-based polyurethane resin impregnated with base fabric printing has been researched. Compared with solvent-based impregnated resins, water-based polyurethane resin is used as a solvent, which can greatly reduce the pressure of environmental protection management of manufacturers and meet environmental protection requirements. However, base fabric printing The thickening phenomenon of impregnated water-based polyurethane resin under the long-term running state, the thickening phenomenon can lead to an increase in the probability of defective products, uneven feeding of the base fabric, and prone to streaks. Impregnation with water-based polyurethane resin is difficult to be widely promoted and used

Method used

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1: Use vacuum extraction to pump 742kg of polypropylene glycol into the dehydration reaction kettle, seal and extract the vacuum, and dehydrate the polypropylene glycol under the conditions of negative pressure -0.08MPa and temperature of 110°C for 1.0h;

[0046] Step 2: After the dehydration is completed, transfer the polypropylene glycol to the prepolymerization reactor, lower the temperature to below 70°C, extract 200kg of isophorone diisocyanate and 70kg of stannous octoate into the prepolymerization reactor, raise the temperature to 90°C and start timing for the first One-step prepolymerization reaction, the reaction time is 2h;

[0047] Step 3: After the reaction is completed, lower the temperature to 60°C, put 42kg of dimethylolpropionic acid and 9kg of trimethylolpropane into the prepolymerization reactor, add 40kg of acetone, and raise the temperature to 80°C for the second step of chain extension prepolymerization Reaction, reaction 3h, finishes the second ...

Embodiment 2

[0055] A preparation method for base cloth printing and impregnating water-based polyurethane, comprising the steps of:

[0056] Step 1: Use vacuum extraction to pump 700kg of polypropylene glycol into the dehydration reaction kettle, seal and extract the vacuum, and dehydrate the polypropylene glycol under the conditions of negative pressure -0.08MPa and temperature of 110°C for 1.0h;

[0057] Step 2: After the dehydration is completed, transfer the polypropylene glycol to the prepolymerization reactor, lower the temperature to below 70°C, extract 135kg of toluene diisocyanate into the prepolymerization reactor, raise the temperature to 85°C and start the first step of the prepolymerization reaction, the reaction is 2h;

[0058] Step 3: After the reaction is completed, cool down to 55°C, throw 38kg of dimethylolpropionic acid, 5kg of trimethylolpropane and 2kg of 1.6 hexanediol, 50g of catalyst stannous octoate, add 30kg of acetone, and heat up to 80°C for the second step. T...

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Abstract

Belonging to the technical field of environment-friendly waterborne polyurethane, the invention discloses a waterborne polyurethane for base cloth printing impregnation and a preparation method thereof. The waterborne polyurethane for base cloth printing impregnation comprises the following substances by weight: 700-742 parts of polypropylene glycol, 135-200 parts of a diisocyanate compound, 5-11parts of a plasticizer, 38-42 parts of dimethylolpropionic acid, 0.05-0.07 part of a catalyst stannous octoate, 30-40 parts of acetone, 2.5-7 parts of a chain extender, 27-30 parts of a neutralizer and 1200-1500 parts of deionized water. The product provided by the invention has the advantages of small environmental pollution, simple technological operation flow, low VOC and the like. The printedand impregnated base cloth generally requires peel strength of greater than 6kg / 3cm, normal-temperature folding resistance of greater than 80,000 times and low-temperature folding resistance (-20DEG C) of greater than 20,000 times, the hydrolysis resistance requires that after 12h of soaking in a 10% sodium hydroxide solution, 75% or more of the physical properties are retained, and higher-end products need to meet the jungle experiment requirements. After the waterborne polyurethane resin for printing impregnation prepared according to the invention is applied to leather-imitation factories and microfiber-imitation factories, base materials can meet the industrial leather requirements.

Description

technical field [0001] The invention belongs to the field of environment-friendly water-based polyurethane, in particular to a water-based polyurethane for base cloth printing and impregnation and a preparation method thereof. Background technique [0002] Genuine leather tanneries generally use the base fabric to compound kraft fiber powder for production. Due to the difference between the base fabric and the structure of the genuine leather, in order to make the base fabric closer to the feel of the genuine leather, impregnation is usually required to improve various indicators. There are many kinds of solvent-based impregnated resins on the market, but as people pay more and more attention to environmental protection, solvent-based impregnated resins will generally use solvent DMF in the production process, which will easily cause environmental pollution and increase the environmental protection pressure of manufacturers. In order to meet the requirements of environmental...

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/66C08G18/48C08G18/32C08G18/10D06M15/568
CPCC08G18/10C08G18/4825C08G18/755C08G18/7614D06M15/568D06M2200/25C08G18/348C08G18/3206C08G18/3228C08G18/3246
Inventor 徐旭东刘娅林宁继鑫张留生郭翠娟陈玉国陈建栋高云峰郑萍赵继光
Owner SHANDONG TIANQING TECH DEV
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