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Hyperbranched modified hydroxy acrylic resin aqueous dispersion, and preparation method and application thereof

A hydroxyacrylic acid and dispersion technology, applied in the direction of graft polymer adhesives, adhesive types, adhesives, etc., can solve the problems of high solid content and low viscosity, and achieve excellent UV resistance and viscosity reduction. , the effect of simple operation

Inactive Publication Date: 2013-09-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the above-mentioned high solid content and low viscosity are difficult to balance, and provides a high-solid and low-viscosity hydroxyl acrylic resin aqueous dispersion modified with terminal alkenyl hyperbranched polymer and its preparation method

Method used

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  • Hyperbranched modified hydroxy acrylic resin aqueous dispersion, and preparation method and application thereof
  • Hyperbranched modified hydroxy acrylic resin aqueous dispersion, and preparation method and application thereof
  • Hyperbranched modified hydroxy acrylic resin aqueous dispersion, and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0034] Embodiment 1: the preparation of hyperbranched polyester acrylate modified hydroxyl acrylic resin aqueous dispersion

[0035]Add 75g of propylene glycol methyl ether acetate and 1g of initiator di-tert-butyl peroxide into a 500ml four-necked flask equipped with a stirrer, condenser, thermometer, and oil bath, stir and heat up to reflux under nitrogen protection Temperature 180°C; 10g butyl acrylate, 22g hydroxyethyl acrylate, 45g methyl methacrylate, 3g acrylic acid, 10g styrene, 10g terminal alkenyl hyperbranched polyester acrylate Boltorn B-H20 (Sweden Perstorp company), Add 3.5g of di-tert-butyl peroxide and 5g of dodecyl mercaptan into the beaker and stir magnetically for 15 minutes to mix evenly to obtain the mixed raw materials. After the temperature in the flask is raised to 180°C, pre-inject 10% of the above mixed raw materials into the flask at one time. , to make reaction "seeds"; after half an hour, use a constant flow pump to slowly drop the remaining mixed ...

Embodiment 2

[0037] Embodiment 2: Preparation of hyperbranched polyurethane acrylate modified hydroxyl acrylic resin aqueous dispersion

[0038] Add 75g of propylene glycol butyl ether and 1g of initiator di-tert-butyl peroxide into a 500ml four-neck flask equipped with a stirrer, condenser, thermometer, and oil bath as a base material, stir, and heat up to a reflux temperature of 120°C under nitrogen protection. ℃; 10g butyl acrylate, 22g hydroxyethyl acrylate, 45g methyl methacrylate, 3g acrylic acid, 10g styrene, 10g terminal alkenyl hyperbranched polyurethane acrylate (HBPUA) (Sweden Perstorp company), 3.5g di-tert Butyl peroxide and 5g of dodecyl mercaptan were added to the beaker and stirred magnetically for 15 minutes to mix evenly to prepare mixed raw materials. After the temperature in the flask was raised to 120°C, 10% of the above mixed raw materials were pre-injected into the flask at one time and reacted" After half an hour, use a constant flow pump to slowly drop the remainin...

Embodiment 3

[0040] Embodiment 3: Preparation of hyperbranched polyether acrylate modified hydroxyl acrylic resin aqueous dispersion

[0041] Add 75g of propylene glycol butyl ether and 1g of initiator di-tert-butyl peroxide into a 500ml four-neck flask equipped with a stirrer, condenser, thermometer, and oil bath as a base material, stir, and heat up to a reflux temperature of 150 ℃; 10g butyl acrylate, 22g hydroxyethyl acrylate, 45g methyl methacrylate, 3g acrylic acid, 10g styrene, 10g terminal alkenyl hyperbranched polyether acrylate (Perstorp, Sweden), 3.5g di-tert-butyl Add peroxide and 5g of dodecyl mercaptan into the beaker and stir magnetically for 15 minutes to mix evenly to prepare mixed raw materials. After the temperature in the flask is raised to 150°C, 10% of the above mixed raw materials are pre-injected into the flask at one time to make reaction "seeds" After half an hour, use a constant flow pump to slowly drop the remaining mixed raw materials into the four-necked flask...

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Abstract

The invention discloses a hyperbranched modified hydroxy acrylic resin aqueous dispersion, and a preparation method and application thereof. The method comprises the following steps of: mixing a solvent with 5%-10% by mass of initiator and increasing the temperature to a reflow temperature; mixing a main monomer, a functional monomer and a hyperbranching modifier in a raw material formula with 40%-60% by mass of initiator in the raw materials and a chain transfer agent to obtain a mixture; firstly, feeding 10%-20% by mass of mixture to a container at a temperature increased to 120 to 180 DEG C previously at a time; after half an hour, adding dropwise the left mixture; preserving heat, adding the left initiator and then continuing heat preservation, thereby obtaining acrylic resin; and reducing the temperature, adding dropwise a neutralizer, adding a cosolvent and de-ionized water, and dispersing, thereby obtaining the hyperbranched modified hydroxy acrylic resin aqueous dispersion. The molecular chain of the dispersion prepared by using the preparation method disclosed by the invention contains many hyperbranched polymer branch chains so that the hydroxy acrylic resin aqueous dispersion still keeps low viscosity even at high solid content; and therefore, the formation of a high-fullness uniform coating is facilitated.

Description

technical field [0001] The present invention relates to a kind of waterborne acrylic resin coating, particularly relate to a kind of aqueous dispersion of hydroxyl acrylic resin, especially relate to the aqueous dispersion of high solid and low viscosity hydroxyl acrylic resin modified with terminal alkenyl hyperbranched polymer and preparation thereof The method belongs to the technical field of functional environmental protection paint. Background technique [0002] With the enhancement of people's awareness of environmental protection and the continuous improvement of laws, water-based coatings have become the main direction of coating development. At present, domestic automotive coating industrial coatings are generally still solvent-based coatings, which cause a large amount of VOC emissions, so the development of water-based automotive coatings is imperative. The resins used to prepare water-based automotive coatings mainly include water-based acrylic resins, water-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/14C08F220/28C08F220/18C08F212/08C08F220/06C08F2/06C08F2/38C08J3/07C08L51/08C09J151/08C09J161/20
Inventor 涂伟萍袁腾王锋胡剑青
Owner SOUTH CHINA UNIV OF TECH
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