Method for preparing modified double-component high-temperature-resistant waterborne polyurethane pressure-sensitive adhesive

A water-based polyurethane, high temperature resistant technology, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problems of not being able to meet high-performance pressure-sensitive adhesives, poor pressure sensitivity, poor high temperature resistance, etc. , to achieve the effect of improving pressure sensitivity, low cost and good pressure sensitivity

Inactive Publication Date: 2013-12-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the performance of a single water-based polyurethane adhesive cannot meet the needs of high-performance pressure-sensitive adhesives. It is mainly manifested in poor pressure sensitivity, slow drying speed, and poor high-temperature resistance. growing demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]React 100g MDI and 320g polyoxypropylene diol with a molecular weight of 2000 at 75°C for 3h, then add 15g dimethylol propionic acid, and react for 2h to obtain a polyurethane prepolymer; 6g modified E-44 epoxy resin, Add 10g of hydroxyethyl acrylate to the prepolymer, react with the prepolymer at 78°C for 3h to obtain a modified polyurethane prepolymer, then lower the temperature to 35°C, add 5g of triethylamine for neutralization for 15min, and Add 498g of deionized water at a rotating speed of 1 / min, and disperse for 10min to obtain a modified water-based polyurethane dispersion. Add 50g of butyl acrylate, 27g of modified rosin resin and 0.67g of ammonium persulfate uniformly dropwise to the modified water-based polyurethane dispersion, react at 75°C for 3.5h, then raise the temperature to 85°C and keep it warm for 1 hour, cool down to room temperature, and material and filtered to obtain a modified water-based polyurethane dispersion. Preparation of modified rosin r...

Embodiment 2

[0032] React 100g of TDI and 478g of polyethylene adipate diol with a molecular weight of 1000 at 70°C for 2.5h, then add 10g of dimethylolacetic acid, and react for 3h to obtain a polyurethane prepolymer; mix 10g of modified epoxy Add resin E-20, 10g hydroxypropyl acrylate to the prepolymer, react with the prepolymer at 65°C for 4 hours to obtain a modified epoxy resin modified polyurethane prepolymer, then cool down to 30°C, add 5 g of triethanolamine was neutralized for 15 min, and 531 g of deionized water was added at a speed of 4500 r / min, and dispersed for 15 min to obtain a modified water-based polyurethane dispersion. Evenly add 77g of ethyl acrylate, 20g of modified rosin resin and 0.6g of potassium persulfate dropwise to the modified water-based polyurethane dispersion, react at 70°C for 3h, then raise the temperature to 80°C and keep it warm for 1 hour, cool down to room temperature, and material and filtered to obtain a modified water-based polyurethane dispersion....

Embodiment 3

[0040] 100g of IPDI and 640g of polyadipate-1,4-butylene glycol ester diol with a molecular weight of 3000 were reacted at 80°C for 3h, then 12g of dimethylolpropionic acid was added, and reacted for 4h to obtain a polyurethane prepolymer; 9.5 g containing modified E-51 epoxy resin, 14g hydroxyethyl acrylate is added in the prepolymer, react with the prepolymer at 70°C for 5h to obtain the polyurethane prepolymer modified by modified epoxy resin, and then Cool down to 38°C, add 6g of triethanolamine for neutralization for 12min, add 454g of deionized water at a speed of 4000r / min, and disperse for 10min to obtain a modified waterborne polyurethane dispersion. Evenly add 35g of isooctyl acrylate, 20g of modified rosin resin and 0.5g of azobisisobutyronitrile dropwise into the modified water-based polyurethane dispersion, react at 72°C for 4h, then heat up to 88°C for 1 hour, and then drop to room temperature, discharging and filtering to obtain a modified water-based polyuretha...

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Abstract

The invention discloses a method for preparing a modified double-component high-temperature-resistant waterborne polyurethane pressure-sensitive adhesive. The method comprises the following steps: adding polyisocyanate and low polymer polyhydric alcohol into reaction equipment, further adding a hydrophilic chain extender to react to obtain a polyurethane prepolymer, subsequently adding acrylic ester containing hydroxyl and a modified epoxy resin so as to obtain the modified polyurethane prepolymer; further adding a neutralizer to neutralize, adding water, subsequently dispersing by using a high-speed dispersing machine so as to obtain a modified waterborne polyurethane dispersoid; uniformly dripping acrylate monomer, a modified rosin resin and an initiating agent so as to obtain a modified waterborne polyurethane dispersoid; further adding a defoaming agent, and finally adding a curing agent additionally so as to obtain the modified double-component high-temperature-resistant waterborne polyurethane pressure-sensitive adhesive. The pressure-sensitive adhesive prepared through the method is high in primary adhesion property, release force, adhesion lasting property and high-temperature adhesion lasting property; a high-temperature-resistant pressure-sensitive adhesive tape prepared from the adhesive can meet the requirements of automobile and electronic industries. According to the invention, the preparation process is simple, the production period is short and the operation cost is low.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature-resistant pressure-sensitive adhesive that can be used in the fields of automobiles and electronic industries, and in particular to a preparation method of a modified two-component water-based polyurethane high-temperature-resistant pressure-sensitive adhesive. Background technique [0002] With the development of high technology, high-performance pressure-sensitive adhesives have become a hot spot for high-performance pressure-sensitive tapes and labels. High-performance pressure-sensitive tapes and labels made of high-performance pressure-sensitive adhesives are widely used in automobiles, electronic appliances, wind power generation devices, aviation and other fields for bundling, covering, sealing, protection, splicing, stamping, fixing, and marking , anti-corrosion, etc., its demand is growing rapidly. With the development of automobiles, electronic appliances, wind power generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/00C08F283/00C08G18/69C08G18/66C08G18/42C08G18/48C08G18/34C08G18/12C08G18/67C08G18/58C09J151/08
Inventor 傅和青王荣周威刘康何飞强
Owner SOUTH CHINA UNIV OF TECH
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