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Hyperbranched polyester modified acrylic resin and preparation method thereof

A technology of acrylic resin and hyperbranched polyester, applied in the direction of coating, etc., can solve the problems of poor controllability, complicated preparation process, high production cost, etc., and achieve the effect of low production cost, wide sources and reduced usage

Active Publication Date: 2013-02-06
ETERNAL CHEM (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But AB n Type monomers generally need to be synthesized by researchers themselves, the preparation process is complicated, the controllability is poor, and the production cost is high, which makes this synthesis method have certain limitations.

Method used

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  • Hyperbranched polyester modified acrylic resin and preparation method thereof
  • Hyperbranched polyester modified acrylic resin and preparation method thereof
  • Hyperbranched polyester modified acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Mix 0.7g of p-phenylmethanesulfonic acid, 13.6g of pentaerythritol and 53.54g of dimethylolpropionic acid (DMPA), react at 160°C for 2.5h, and vacuumize (740mmHg) at the same time to obtain a transparent yellowish liquid; Then add 107.28g DMPA to the system, and react under vacuum (740mmHg) at 160°C until the acid value of the resin is less than 10mg KOH / g, pour it out, and obtain hyperbranched polyester after cooling.

[0025] (2) Add 80g of xylene to a four-necked flask equipped with a condenser, stirrer and thermometer, raise the temperature to 140±2°C, then add 3g of acrylic acid, 28g of butyl acrylate, 32g of methyl methacrylate and 2g of BPO and A mixed solution composed of 1g of chain transfer agent n-dodecanethiol was evenly put into the dropping funnel; it was evenly dropped into a four-necked flask filled with xylene for 4~5h, and then kept at 140±2°C for 1h, and then added 0.35 g initiator BPO and 14g xylene were added to a four-neck flask with a dropping...

Embodiment 2

[0032] (1) Mix 0.7g of p-phenylmethanesulfonic acid, 13.6g of pentaerythritol and 53.64g of dimethylolpropionic acid (DMPA), react at 160°C for 2.5h, and vacuumize (740mmHg) at the same time to obtain a transparent yellowish liquid; Then add 107.28g DMPA to the system, and react under vacuum (740mmHg) at 160°C until the acid value of the resin is less than 10mg KOH / g, pour it out, and obtain hyperbranched polyester after cooling.

[0033](2) Add 70g of xylene to a four-neck flask equipped with a stirrer, thermometer, dropping funnel and reflux condenser, add 32g of methyl methacrylate, 28g of butyl acrylate, 3g of acrylic acid, 2g of BPO and 1g of n-decyl Add dithiol into the dropping funnel, heat under stirring, and control the temperature at 120°C, that is, when the solvent reaches the reflux state, evenly drop the mixed monomer and initiator into the reactor within 4.0h, when mixed After the monomer is added dropwise, add a small amount of initiator, keep warm for 1.0h, the...

Embodiment 3

[0036] (1) Mix 0.9g p-phenylmethanesulfonic acid, 13.6g pentaerythritol and 53.64g dimethylolpropionic acid (DMPA), react at 180°C for 2.5h, and vacuumize (740mmHg) at the same time to obtain a transparent yellowish liquid; Then add 107.28g DMPA to the system, and react under vacuum conditions (740mmHg) at 160°C until the acid value of the resin is less than 10mg KOH / g, pour it out, and obtain hyperbranched polyester after cooling.

[0037] (2) Add 70g of xylene to a four-neck flask equipped with a stirrer, thermometer, dropping funnel and reflux condenser, add 32g of methyl methacrylate, 28g of butyl acrylate, 3g of acrylic acid, 2g of BPO and 1g of n-decyl Add dithiol into the dropping funnel, heat under stirring conditions, and control the temperature at 120°C, that is, when the solvent reaches the reflux state, evenly drop the mixed monomer and initiator into the reactor within 4.0h, when mixed After the monomer is added dropwise, add a small amount of initiator, keep it w...

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Abstract

The invention relates to hyperbranched polyester modified acrylic resin and a preparation method thereof. Firstly, a By-type polyhydroxylated compound is taken as nuclear molecules (wherein B represents hydroxyl, and the degree of functionality y of B is larger than of equal to 2), ABx-type polyhydroxy acid is taken as divergence molecules (wherein A represents carboxyl, B represents hydroxyl and x represents the degree of functionality of hydroxyl and is larger than or equal to 2), a polyester-type hyperbranched polymer with hydroxyl at the terminal is obtained through a vacuum fusion polycondensation method, and esterification reaction is performed on prepared hyperbranched polyester and acrylic resin with carboxyl in the presence of a water-carrying agent to obtain hyperbranched polyester modified acrylic resin. Acrylate with hyperbranched polyester introduced enriches a great amount of hydroxyl, and is taken as a cross-linking group to greatly reduce the curing time of a coating film; and at the same time, hyperbranched polyester has excellent performance of dendritic polymer, molecular chains are not easily twisted, and hyperbranched polyester modified acrylic resin with high solidity and low viscosity can be obtained. According to the invention, the source of raw materials is wide, the price of the raw materials is low, the synthetic method is simple, the controllability is good, and the production cost is low.

Description

technical field [0001] The invention relates to an acrylic resin and a preparation method thereof, in particular to a hyperbranched polyester modified acrylic resin and a preparation method thereof. Background technique [0002] The synthetic technology of acrylic resin is mature, the raw material is easy to obtain, and the comprehensive performance of the coating film is good. Traditional acrylic resin coatings have low solid content and contain a large amount of volatile organic solvents (VOC), which cause serious pollution to the environment. [0003] Hyperbranched polymers are a type of highly branched polymers with three-dimensional structure. They have the characteristics of high solubility, low viscosity, high rheology and a large number of terminal functional groups that ordinary linear polymers do not have. They are used in rheological additives, Functional fields such as coatings, plasticizers, catalysts, photoelectric materials, and nanomaterials have been applie...

Claims

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Application Information

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IPC IPC(8): C08G81/02C09D187/00
Inventor 潘金城翁进益
Owner ETERNAL CHEM (CHINA) CO LTD
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