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End-capped waterborne polyurethane vacuum plastic suction adhesive and preparation method thereof

A water-based polyurethane and vacuum suction technology, applied in the field of water-based polyurethane, can solve the problems of inability to vacuum plastics with soles, no adhesive initial viscosity, low initial viscosity, etc. high sex effect

Pending Publication Date: 2022-07-15
河北邦泰氨纶科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Invention CN 113201110 A discloses a blocked multi-branched water-based polyurethane cross-linking agent and its preparation method. The invention uses sodium bisulfite to block the water-based polyurethane, but the polyols and isocyanates involved in the reaction are all of a single type Small molecules, and the product is low-molecular-weight multi-branched water-based polyurethane, which does not have the initial tack of adhesives, so it cannot be used for vacuum plastic absorption; Invention CN 111040116 A discloses a water-based polyurethane finishing agent and its preparation method and its anti-wrinkle effect on fabrics In the application in this invention, sodium bisulfite is also used in this invention to prepare water-based polyurethane, but the polyol in this invention is a PTMEG macromolecule, and the isocyanate is a single type of IPDI. The product of the invention is soft and has strong adhesion to the substrate, but the initial tack is low. Can be used for crosslinking agent and fabric finishing, not for shoe sole vacuum blister

Method used

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  • End-capped waterborne polyurethane vacuum plastic suction adhesive and preparation method thereof
  • End-capped waterborne polyurethane vacuum plastic suction adhesive and preparation method thereof
  • End-capped waterborne polyurethane vacuum plastic suction adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Step 1. Add 100 g of polyethylene adipate diol with M=2500 and 100 g of polyethylene adipate diol with M=2300 to a 1L four In a round-bottomed flask with a vacuum degree of -0.09 to (-0.1) MPa, it was kept at 110 to 130 °C for 2 hours of dehydration.

[0048] Step 2. Cool the temperature to 80°C, add 12 g of isophorone diisocyanate, 18 g of hexamethylene diisocyanate, add 10 mg of catalyst, and keep the temperature at 70-90°C for 3 hours.

[0049] Step 3. Cool the temperature to 60°C, add 1.38g of NPG, 50g of acetone mixture, add 10mg of catalyst, and maintain the reflux reaction at 50-60°C for 2h.

[0050] Step 4. Add 50 g of acetone to the system to dilute and cool down to 20°C.

[0051] Step 5. Add 14g capping agent NaHSO 3 A mixed solution of 50 g of water and 50 g of ethanol was added with 8 mg of catalyst benzyl triethyl ammonium chloride, and the reaction was carried out for 30 min under high-speed stirring at 1200 r / min.

[0052] Step 6. After adding 150 g of...

Embodiment 2

[0056] Step 1. Add 133 g of polybutylene adipate diol with M=2500 and 67 g of polybutylene adipate diol with M=3000 to 1L of the 1L equipped with an electric mixer, a condenser and a thermometer. In a four-necked round-bottomed flask, dehydrate at 110-130 °C for 2 h under a vacuum of -0.09 to (-0.1) MPa.

[0057] Step 2: Cool the temperature to 80°C, add 10 g of isophorone diisocyanate, 18 g of hexamethylene diisocyanate, add 10 mg of catalyst, and keep the temperature at 70-90°C for 3 hours.

[0058] Step 3. Cool the temperature to 60 °C, add 2.3 g of butanediol, 50 g of acetone mixed solution, add 10 mg of catalyst, and maintain the reflux reaction at 50-60 °C for 2 hours.

[0059] Step 4. Add 50 g of acetone to the system to dilute and cool down to 20°C.

[0060] Step 5. Add 12g capping agent NaHSO 3 A mixed solution of 50 g of water and 50 g of ethanol was added with 8 mg of catalyst benzyl triethyl ammonium chloride, and the reaction was carried out for 30 min under hig...

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Abstract

The invention discloses an end-capped waterborne polyurethane vacuum plastic suction adhesive and a preparation method thereof, and belongs to the technical field of waterborne polyurethane. The end-capped waterborne polyurethane vacuum plastic suction adhesive is prepared from the following raw materials: polyester polyol, aliphatic diisocyanate, a micromolecular hydroxyl-terminated chain extender, an end-capping reagent, Na2CO3, a defoaming agent, an antibacterial agent, a wetting agent and a thickening agent. The preparation method comprises the following steps: synthesizing a prepolymer by using mixed polyester polyol, mixed isocyanate and a chain extender, then introducing an end-capping reagent into a waterborne polyurethane system, carrying out end capping on part of NCO groups in the prepolymer and providing hydrophilicity, and after emulsification, carrying out chain extension on uncapped NCO and water to form a macromolecular waterborne polyurethane system. The adhesive not only has certain initial viscosity, but also can provide NCO groups for reaction crosslinking in the later period, so that the heat resistance and hydrolysis resistance of a finished product are improved.

Description

technical field [0001] The invention belongs to the technical field of water-based polyurethane, in particular to an end-capped water-based polyurethane vacuum suction plastic and a preparation method thereof. Background technique [0002] Water-based vacuum suction plastic is one of the water-based polyurethane adhesives. It is mainly used for bonding computer desks, office desks, blister doors, audio boards, cabinet boards and other blister boards. It has also been used in the shoe industry in the past two years. [0003] At present, water-based polyurethane suction plastic in the footwear industry is mainly used in vacuum suction soles. Vacuum suction soles are favored by shoe factories and consumers because of their beautiful and unique appearance, soft and elastic texture, and good wear resistance. The soles produced by the vacuum blister process have unique requirements for absorbing plastics: (1) In order to facilitate the production of orders, the soles after sprayin...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/83C08G18/75C08G18/66C08G18/42C08G18/32
CPCC09J175/06C08G18/83C08G18/664C08G18/4238C08G18/3206C08G18/755C08G18/758
Inventor 韩风安郎增科贾振兴郑玉成李帅滑冰涛赵莉莉郎东辉郎潇李思奇
Owner 河北邦泰氨纶科技有限公司
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