Acrylic acid adhesive with high solid content and low viscosity and preparation method thereof

An acrylic adhesive, high solid content technology, applied in the direction of adhesive types, ester copolymer adhesives, etc., can solve the problems of limiting the application range of products, affecting the mechanical properties of adhesives, and increasing viscosity, so as to avoid harm to the human body. Effects of healthy and polluting environment, low polydispersity, low organic solvent content

Active Publication Date: 2022-04-12
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing high-solid acrylic resin is a linear polymer formed by free radical polymerization, increasing the solid content will lead to a sharp increase in viscosity
To reduce the viscosity, it is necessary to reduce the molecular weight of the resin or use a solvent with high solubility, which will affect the mechanical properties of the adhesive and limit the application range of the product

Method used

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  • Acrylic acid adhesive with high solid content and low viscosity and preparation method thereof
  • Acrylic acid adhesive with high solid content and low viscosity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] An acrylic adhesive with high solid content and low viscosity and a preparation method thereof, comprising the following steps:

[0044] (1) Add the following solvents in parts by weight in a dry container: 18 parts of toluene, 9 parts of ethyl acetate, 3 parts of methanol, heat up to 80°C while stirring, and feed nitrogen for 1.5 hours until the air is exhausted ;

[0045] (2) Under a nitrogen atmosphere and a constant temperature of 70°C, 60 parts of n-butyl acrylate, 28 parts of isooctyl acrylate, 4 parts of acrylic acid, 1 part of hydroxyethyl acrylate, 3 parts of morpholine acrylate, and 0.03 parts of mercaptoethanol and 0.05 parts of azobisisobutyronitrile are mixed evenly and then continuously added dropwise to the reactor for 2 hours, and after the dropwise addition is completed, the temperature is raised to 80°C to continue the reaction for 1 hour;

[0046] (3) Add 7 parts of vinyl acetate and 0.1 part of benzoyl peroxide into the reaction system, react at 80°...

Embodiment 2

[0048] An acrylic adhesive with high solid content and low viscosity and a preparation method thereof, comprising the following steps:

[0049](1) Add the following solvents in parts by weight in a dry container: 18 parts of toluene, 9 parts of ethyl acetate, 3 parts of methanol, heat up to 80°C while stirring, and feed nitrogen for 1.5 hours until the air is exhausted ;

[0050] (2) Under a nitrogen atmosphere and a constant temperature of 80°C, 62 parts of n-butyl acrylate, 20 parts of isooctyl acrylate, 4 parts of methyl acrylate, 5 parts of hydroxyethyl acrylate, 2 parts of morpholine acrylate, 0.09 parts Mercaptoethanol and 0.05 parts of azobisisobutyronitrile are mixed evenly and then added dropwise to the reactor continuously for 4 hours. After the dropwise addition, the temperature is raised to 90°C to continue the reaction for 1 hour;

[0051] (3) Add 9 parts of glycidyl methacrylate and 0.15 parts of benzoyl peroxide into the reaction system, react at 90°C for 3 hou...

Embodiment 3

[0053] An acrylic adhesive with high solid content and low viscosity and a preparation method thereof, comprising the following steps:

[0054] (1) Add the following solvents in parts by weight in a dry container: 18 parts of toluene, 9 parts of ethyl acetate, and 3 parts of methyl ethyl ketone, heat up to 80°C while stirring, and feed nitrogen for 1.5 hours until exhausted Air;

[0055] (2) Under a nitrogen atmosphere and a constant temperature of 80°C, 66 parts of n-butyl acrylate, 22 parts of isooctyl acrylate, 4 parts of methyl acrylate, 3 parts of hydroxyethyl acrylate, 2 parts of morpholine acrylate, 0.09 parts Mercaptoethanol and 0.1 part of benzoyl peroxide are mixed evenly and then continuously added dropwise to the reaction kettle for 3 hours. After the dropwise addition, the temperature is raised to 90°C and the reaction is continued for 1 hour;

[0056] (3) Add 5 parts of vinyl acetate and 0.1 part of benzoyl peroxide into the reaction system, react at 90°C for 3 ...

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Abstract

The invention discloses an acrylic acid adhesive with high solid content and low viscosity and a preparation method thereof. The adhesive comprises the following components in parts by weight: 80-90 parts of a soft monomer, 1-10 parts of a hard monomer, 1-10 parts of a first functional monomer, 1-10 parts of a second functional monomer, 0.01-0.2 part of a free radical initiator, 0.01-0.5 part of a chain transfer agent and 25-35 parts of a solvent, the preparation method comprises the following steps: (1) adding a solvent into a dry container, heating and stirring the solvent, and introducing nitrogen until air in the container is exhausted; (2) in a nitrogen atmosphere, uniformly mixing a soft monomer, a hard monomer, a first functional monomer, a chain transfer agent and a first free radical initiator, and continuously dropwise adding the mixture into the container for reaction; and (3) adding a second functional monomer and a second free radical initiator into the container, and reacting to obtain the adhesive. According to the formula and the preparation method, the acrylic acid adhesive which is high in solid content, relatively low in viscosity, low in polydispersity and good in mechanical property is prepared.

Description

technical field [0001] The invention relates to an acrylic resin, in particular to a high-solid and low-viscosity acrylic adhesive and a preparation method thereof, belonging to the field of organic polymer synthesis. Background technique [0002] Polyacrylate adhesives are widely used in industrial and civil fields such as aircraft, automobiles, instruments and equipment, construction, furniture, etc. due to their characteristics of easy synthesis, good durability, good low temperature performance, low toxicity, and wide bonding surface. However, with the enhancement of people's awareness of environmental protection and the increasingly stringent laws and regulations, energy conservation and emission reduction have been paid more and more attention by countries all over the world. However, traditional acrylic adhesives use low-solid solvent-based composite adhesives, about 70% of which are solvents. The solid content is low and the organic solvent content is high, resulting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C08F220/18C08F220/06C08F220/20C08F220/58C08F218/08C08F220/32
Inventor 鄢家博吴喜来芋野昌三李燚陈洪野吴小平
Owner CYBRID TECHNOLOGIES INC
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