Method for producing ultra-high solid content hydroxy acrylic resin

A hydroxyacrylic acid, ultra-high solid content technology, applied in the direction of coating, can solve the problems of large motion resistance, serious intermolecular entanglement, and reduced reactivity

Active Publication Date: 2008-05-07
中山大桥化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional acrylic resin is a linear polymer obtained by free radical polymerization of vinyl monomers. At a high concentration, the intermolecular entanglement is serious, and it has a large movement resistance, which is manifested as a high flow viscosity, thus giving it a direct application of
In addition, some active functional groups in the molecular structure are cov

Method used

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  • Method for producing ultra-high solid content hydroxy acrylic resin
  • Method for producing ultra-high solid content hydroxy acrylic resin
  • Method for producing ultra-high solid content hydroxy acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Preparation of methyl methacrylate (MMA) / butyl methacrylate (BMA) / hydroxyethyl methacrylate (HEMA) macromonomer (Macromonomer-1): MMA100g / HEMA 130g / BMA 160g and 167g butyl acetate Ester, 1.95g AIBN, and 78.5mg COPhBF (bis(difluoroboron benzenedione oxime) cobalt acid (II) salt) were mixed uniformly and then added to the reaction flask, heated and stirred at 75°C under nitrogen atmosphere, and reacted for 5h. The solid content of the product is 65%, and the conversion rate is 93%. GPC result Mn=3097, Mw / Mn=1.75.

[0089] Add 60g of butyl acetate and 1.5g of AIBN to a three-necked flask. After the initiator is dissolved, the temperature is raised to 75°C, and then 300g of the resulting Macromonomer-1 solution, 31.5g of styrene (St), 31.5g of hydroxyethyl acrylate (HEA), and 36.75 After mixing g methyl acrylate (MA) and 5.25 g acrylic acid (AA) uniformly, they were slowly dripped into the flask through a constant pressure dropping funnel for 4 hours. After holding for 1 hour, ...

Embodiment 2

[0091] Preparation of MMA / BMA / HEMA macromonomer (Macromonomer-2): MMA100g / HEMA 130g / BMA 160g mixed with 167g butyl acetate, 1.95g AIBN, 100mg COPhBF and then added to the reaction flask, heated at 75°C under nitrogen atmosphere Stir and react for 5h. The solid content of the product is 62%, and the conversion rate is 89%. GPC result Mn=1581, Mw / Mn=1.56.

[0092] Add 60g butyl acetate and 1.5g AIBN to a three-necked flask. After the initiator is dissolved, the temperature is raised to 75°C, and then 300g of the resulting Macromonomer-2 solution is mixed with 31.5g St, 31.5g HEA, 36.75g MA, 5.25g AA. Add 15 g of butyl acetate and 0.25 g of AIBN to the flask slowly after 4 hours of constant pressure dropping funnel, and then add 15 g of butyl acetate and 0.25 g of AIBN after holding for 1 hour, and then keep the temperature for 2 hours. After being naturally cooled, it is mixed with 3 times the volume of butyl acetate and passed through a silica gel column with a height of 5 cm for d...

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Abstract

The invention relates to a method for preparing a super-high solid content hydroxyacrylic resin, which belongs to the paint manufacturing industry. It adopts the copolymerization of methacrylate macromolecular monomers with polymerizable double bonds at the end and vinyl monomers to obtain a grafted hydroxyl acrylic resin. The resin has excellent properties, low viscosity, and a solid content of over 80%, which can save organic solvents, reduce environmental pollution, and avoid the introduction of mercaptan odor. The invention comprises the following steps: (A) adding methacrylic acid ester macromonomer into the copolymerized polyethylene monomer of synthetic resin, the dosage is 1-20%; (B) the copolymerized polyethylene monomer comprises 10-35% Alkyl methacrylate, 10-40% hydroxyalkyl methacrylate, 1-10% unsaturated carboxylic acid and 0-50% other vinyl monomers; (C) add solvent to the reactor and introduce nitrogen Heating to reflux temperature, heat preservation, additional initiator and solvent, cooling and then mixing with 3 times the solvent, decolorization, and vacuum distillation to obtain the finished product.

Description

【Technical Field】: [0001] The invention adopts the macromonomer method to prepare the graft type ultra-high solid content hydroxy acrylic resin, and is obtained by polymerization by adding a free radical initiator in the presence of a solvent, and belongs to the organic polymer coating manufacturing industry. 【Background technique】: [0002] In the coating industry, acrylic resin has many excellent characteristics (weather resistance, chemical stability, etc.) and is widely used. Traditional solvent-based acrylic resins are subject to competition from environmentally friendly varieties such as water-based, high-solids, powder, and light curing, and their market share is gradually decreasing. High-solid acrylic resins developed on the basis of traditional solvent-based resins have developed rapidly. Compared with traditional solvent-based coatings, high-solid acrylic resin greatly reduces the content of organic volatiles in the coating system and saves curing energy consumption. A...

Claims

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Application Information

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IPC IPC(8): C08F265/04C09D151/06
Inventor 夏必来曾广鹏凌建雄洪昕林张新宇
Owner 中山大桥化工集团有限公司
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