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Dimer acid modified epoxy resin and preparation method therefor

A technology of epoxy resin and dimer acid, which is applied in the preparation of carboxylic acid esters, preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of toughening effect, curing rate and hardness to be improved, so as to improve flexibility, Low irritation, environmentally friendly effect

Inactive Publication Date: 2016-03-23
ANQING HONGTAI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional oleic acid or vegetable oil modified epoxy resin, vegetable oil dimer acid modified epoxy resin vegetable oil chain is located on the molecular side chain of the modified epoxy resin, its toughening effect, curing rate and hardness need to be improved

Method used

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  • Dimer acid modified epoxy resin and preparation method therefor
  • Dimer acid modified epoxy resin and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 100g of bisphenol A epoxy resin E51 in a three-necked flask, add 71.4g of dimer acid (dimer is 80wt%, trimer is 20wt%, carboxyl content is 0.35mol / 100g), and feed dry nitrogen , heat up to 100°C, and add 5ml of 1,4-dioxane; after the temperature is kept stable, add 1g of catalyst tetrabutylammonium bromide, stop feeding nitrogen, and react until the acid value of the system is less than 30mgKOH / g, Add 0.09 g of polymerization inhibitor p-hydroxyanisole, 0.01 g of copper chloride, and 18 g of acrylic acid to the system, and stop the reaction when the acid value of the system is less than 10 mgKOH / g to obtain the product. The test viscosity is 25000mPa·s (60°C).

Embodiment 2

[0024] Weigh 100g of bisphenol A type epoxy resin E51 in a three-necked flask, add 109.3g of dimer acid (dimer is 80wt%, trimer is 20wt%, carboxyl content is 0.35mol / 100g), and feed dry nitrogen , heat up to 100°C, and add 5ml of 1,4-dioxane; after the temperature is kept stable, add 1.5g of catalyst tetrabutylammonium bromide, stop feeding nitrogen, and react until the acid value of the system is less than 30mgKOH / g , add 0.05 g of polymerization inhibitor p-hydroxyanisole, 0.005 g of copper chloride, and 9.18 g of acrylic acid to the system, and stop the reaction when the acid value of the system is less than 10 mgKOH / g to obtain the product. The test viscosity is 20000mPa·s (60°C).

Embodiment 3

[0026] Weigh 100g of bisphenol A type epoxy resin E51 in a three-necked flask, add 71.4g of dimer acid (the dimer is 95wt%, the trimer is 5wt%, the carboxyl content is 0.35mol / 100g), and feed dry nitrogen , the temperature was raised to 105°C, and 5ml of 1,4-dioxane was added; after the temperature was kept stable, 1g of catalyst tetrabutylammonium bromide was added, and nitrogen gas was stopped, and when the acid value of the system was less than 30mgKOH / g, the system was Add 0.09 g of polymerization inhibitor p-hydroxyanisole, 0.01 g of copper chloride, and 18 g of acrylic acid, and stop the reaction when the acid value of the system is less than 10 mgKOH / g to obtain the product. The test viscosity is 14000mPa·s.

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Abstract

The invention discloses dimer acid modified epoxy resin. The epoxy resin has a structural formula represented by a formula shown in the description. The invention also discloses a method for preparing the dimer acid modified epoxy resin. The method comprises the following steps: weighing epoxy resin, putting the weighed epoxy resin in a three-mouthed flask, adding dimer acid into the three-mouthed flask, introducing dry nitrogen gas into the three-mouthed flask, heating the three-mouthed flask to the temperature of 100-110 DEG C, and adding 2wt% of 1,4-dioxane into the three-mouthed flask; and after the temperature is maintained stable, adding a catalyst tetrabutylammonium bromide into the three-mouthed flask, stopping nitrogen gas introducing, adding a polymerization inhibitor into a system when the acid number of the system is lower than 30mgKOH / g during reaction, adding acrylic acid or methylacrylic acid into the three-mouthed flask, stopping the reaction when the acid number of the system is lower than 10mgKOH / g during the reaction, thereby obtaining the product. The dimer acid modified epoxy resin and the preparation method therefor have the advantages that the toughening effect is good, the functionality of modified resin is not changed, the curing rate is higher, and the hardness is not lowered obviously.

Description

technical field [0001] The invention belongs to the field of photocurable resin synthesis in the paint industry, and in particular relates to a dimer acid-modified epoxy resin and a preparation method thereof. technical background [0002] Ultraviolet curing is a material surface treatment technology that appeared in the 1960s. It uses ultraviolet light to trigger rapid polymerization and crosslinking of chemically active liquid materials, and then solidifies to form a solid coating. Photocuring technology is an efficient, environmentally friendly, energy-saving, and high-quality material surface treatment technology. It has the characteristics of high efficiency, wide adaptability, economy, energy saving and environmental friendliness. The photocuring resin is a photosensitive resin with a low molecular weight, which has functional groups that can undergo photocuring reactions, such as acrylate double bonds, epoxy, etc. Among the components of photocurable products, resin...

Claims

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Application Information

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IPC IPC(8): C07C67/26C07C69/608C09D4/02
CPCC07C67/26C07C69/608C07D301/00C07D303/24C09D4/00
Inventor 王文耕
Owner ANQING HONGTAI NEW MATERIAL
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