A new type of water-based two-component polyurethane adhesive acrylic modified resin and polyurethane adhesive containing the resin

A polyurethane adhesive, water-based two-component technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of destroying the ecological environment, declining bonding performance, and fluctuating bonding performance. , to achieve the effect of reducing costs, inhibiting the occurrence of defects, and reducing the difficulty of construction

Active Publication Date: 2021-02-02
BEIJING JINHWEILI APPLIED CHEM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the isocyanate group is very active, it can react with compounds containing active hydrogen such as alcohols, acids, amines and water, and react according to a certain equivalent. The reaction between isocyanate and water generates carbon dioxide, resulting in the loss of isocyanate, which leads to The reduction of the reacted isocyanate in the material or the adhesive base material will result in a decrease in bonding performance or even failure. Therefore, the various raw materials and diluents of general-purpose polyurethane adhesives must strictly control moisture and substances containing active hydrogen such as alcohols and amines. As well as the content of phenols, in high humidity weather such as the rainy season in the south, it will often cause large fluctuations in bonding performance, resulting in unnecessary losses
[0003] At present, the polyurethane adhesives used in China are mainly solvent-based two-component polyurethane adhesives, which contain a large amount of esters, ketones, benzenes and free isocyanates, which are harmful to human health and destroy the ecological environment.
In order to avoid the volatilization of a large amount of organic solvents, researchers have developed water-based polyurethane coatings; generally water-based polyurethane greatly reduces the content of VOC, but due to the unstable performance, isocyanate will react with water to generate carbon dioxide gas, which can easily cause Gelling, peeling from the base material, vesicles and other disadvantages
However, the price of water-based two-component polyurethane adhesives is relatively high, so the current application of water-based two-component polyurethane adhesives has certain limitations.

Method used

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  • A new type of water-based two-component polyurethane adhesive acrylic modified resin and polyurethane adhesive containing the resin
  • A new type of water-based two-component polyurethane adhesive acrylic modified resin and polyurethane adhesive containing the resin
  • A new type of water-based two-component polyurethane adhesive acrylic modified resin and polyurethane adhesive containing the resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Table 1 Polyacid and polyalcohol feed list for partial synthesis of polyester

[0027]

[0028] Table 2. Acrylic resin copolymer monomer initiator feed list

[0029]

[0030] a. Add the monomers in Table 1 except coconut oleic acid to the four-neck flask with stirring, thermometer and rectification column, control the temperature of the kettle not to exceed 230°C, the temperature of the column is 95-100°C, and react for 2-4hrs Weigh the amount of water, the acid value is less than 5mgKOH / g, add coconut oil acid, continue the reaction for 1-1.5hr, the acid value is less than 5mgKOH / g, and cool down to 100°C.

[0031] b. Add 150g propylene glycol methyl ether and 80g ethylene glycol monobutyl ether, and control the temperature to 90-100°C;

[0032] c. At 90-100°C, methyl methacrylate (MMA), butyl acrylate (BA), lauryl methacrylate (LMA), glycidyl methacrylate (GMA), isobornyl methacrylate Mix monomers such as ester (IBOMA) and azobisisobutyronitrile (AIBN) evenly,...

Embodiment 2

[0036] Table 3 Polyacid and polyol feed list for partial synthesis of polyester

[0037]

[0038] Table 4. Acrylic resin copolymer monomer initiator feed list

[0039]

[0040] a. Add the monomers in Table 1 except soybean oil to a four-neck flask equipped with stirring, thermometer and rectification column, control the temperature of the kettle not to exceed 230°C, and the temperature of the column at 95-100°C, and weigh after 2-4hrs of reaction The amount of water output, the measured acid value is less than 5mgKOH / g, add soy oil, continue the reaction for 1-1.5hr, the measured acid value is less than 5mgKOH / g, and cool down to 100°C.

[0041] b. At 100°C, methyl methacrylate (MMA), butyl acrylate (BA), butyl methacrylate (BMA), glycidyl methacrylate (GMA), isobornyl methacrylate ( IBOMA) and other monomers and benzoyl peroxide (BPO) were mixed evenly, and added dropwise into a four-necked bottle, and the dropwise addition time was 2-2.5hr. After the dropwise addition...

Embodiment 3

[0045] Table 5 Polyacid and polyol feed list for partial synthesis of polyester

[0046]

[0047] Table 6. Acrylic resin copolymer monomer initiator feed list

[0048]

[0049] a. Add the monomers in Table 1 except soybean oil to a four-neck flask equipped with stirring, thermometer and rectification column, control the temperature of the kettle not to exceed 230°C, and the temperature of the column at 95-100°C, and weigh after 2-4hrs of reaction The amount of water produced is less than 5mgKOH / g as measured by the acid value. Add soy oil and continue the reaction for 1-1.5hr. The measured acid value is less than 5mgKOH / g, and the temperature is lowered to 110°C.

[0050] b. At 110°C, methyl methacrylate (MMA), butyl acrylate (BA), lauryl methacrylate (LMA), glycidyl methacrylate (GMA), isobornyl methacrylate ( IBOMA) and other monomers and tert-butyl peroxybenzoate (TBPB) were mixed evenly, and added dropwise into a three-necked bottle for 2 to 2.5 hours. After the add...

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PUM

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Abstract

The invention belongs to the field of adhesives and provides a novel acrylic acid modified resin for a waterborne double-component polyurethane adhesive and a polyurethane adhesive comprising the resin. The formula of the resin comprises 0-80 parts of macromolecular resin, 0-60 parts of a solvent, 10-90 parts of vinyl or acrylic acid and ester monomers, 0-8 parts of an initiator, 0.1-20 parts of organic amine and 0-20 parts of an acid substance. The acrylic acid modified resin is obtained through the formula, and the polyurethane adhesive is obtained through matching the resin with an isocyanate component. An isocyanate group hardener in the adhesive optimally reacts with active groups on the resin in a waterborne environment and stably exists in the waterborne environment. The VOC content of the polyurethane adhesive is lower than that of a solvent type polyurethane adhesive. Defects, such as peeling from a base material, film bubbling, poor bonding and material flaws, occurring after a common waterborne polyurethane adhesive is bonded are also eliminated. The cost of the polyurethane adhesive is reduced.

Description

technical field [0001] The invention relates to a novel acrylic modified resin for water-based two-component polyurethane adhesive and a polyurethane adhesive containing the resin, belonging to the field of adhesives. Background technique [0002] Polyurethane adhesives refer to adhesives containing urethane bonds or isocyanate groups in the base material molecule. Polyurethane adhesives contain highly polar and chemically active isocyanate groups and urethane groups, which are compatible with materials containing active hydrogen, porous materials such as wood, leather, paper, ceramics, and smooth surfaces such as metals, glass, rubber, and plastics. The materials have excellent chemical adhesion, and the bond is firm. Because the isocyanate group is very active, it can react with compounds containing active hydrogen such as alcohols, acids, amines and water, and react according to a certain equivalent. The reaction between isocyanate and water generates carbon dioxide, res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C08F220/14C08F220/18C08F220/32C08F212/08C09J175/04
Inventor 黄莹莹程建军秦文
Owner BEIJING JINHWEILI APPLIED CHEM PROD
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