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Improved polyester resin varnish

A technology of polyester resin and lecithin, which is applied in polyester coatings, biocide-containing paints, coatings, etc., can solve the problems of poor stability, impact resistance, smear damage and difficult repair, etc., and achieve good antibacterial performance and properties stable effect

Inactive Publication Date: 2018-05-01
黄岳娇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of existing polyester resin varnishes are: poor adhesion of the paint film, poor stability, and no impact resistance. Oxygen inhibition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1 An improved polyester resin varnish prepared from the following parts by weight of raw materials: 22 parts of dicarboxylic anhydride, 50 parts of phthalic anhydride, 10 parts of 1,2-propylene glycol, 5 parts of polyethylene glycol, and organotin catalyst 3 parts, 100 parts of methyl acetate, 10 parts of nano-sized titanium dioxide powder, 5 parts of anti-skinning agent dipentene, 4 parts of isothiazolone; the preparation steps are as follows:

[0013] S1: Pass protective nitrogen into the reactor, add 1 / 5 of methyl acetate, then add dicarboxylic anhydride, phthalic anhydride, 1,2-propanediol, organotin catalyst, heat up to 140°C and stir for reaction, keep for 2h ; Continue to heat up to 150-155°C and stir the reaction for 1 hour; after the reaction, wait until the reaction solution is cooled to room temperature, and then filter to remove the solvent to obtain a polyester resin;

[0014] S2: Put the polyester resin prepared in step S1 into the reaction kettle, and ...

Embodiment 2

[0015] Example 2 A modified polyester resin varnish prepared from the following parts by weight of raw materials: 25 parts by weight of dicarboxylic anhydride, 40 parts of phthalic anhydride, 8 parts of 1,2-propylene glycol, parts of polyethylene glycol, and 4 parts of organotin catalyst Parts, 130 parts of methyl acetate, 17 parts of nano-sized titanium dioxide powder, 6 parts of anti-skinning agent dipentene, and 2 parts of isothiazolone; the preparation steps are as follows:

[0016] S1: Pass protective nitrogen into the reactor, add 1 / 5 of methyl acetate, then add dicarboxylic anhydride, phthalic anhydride, 1,2-propanediol, organotin catalyst, heat up to 140°C and stir for reaction, keep for 2h ; Continue to heat up to 160-165°C and stir the reaction for 2h; after the reaction, wait until the reaction solution is cooled to room temperature, and then remove the solvent by suction filtration to obtain a polyester resin;

[0017] S2: Put the polyester resin prepared in step S1 int...

Embodiment 3

[0018] Example 3 An improved polyester resin varnish prepared from the following parts by weight of raw materials: 20 parts of dicarboxylic anhydride, 75 parts of phthalic anhydride, 20 parts of 1,2-propylene glycol, 12 parts of polyethylene glycol, and organotin catalyst 5 parts, 70 parts of methyl acetate, 5 parts of nano-sized titanium dioxide powder, 3 parts of anti-skinning agent dipentene, 5 parts of isothiazolone, 3 parts of Tween-80, 4 parts of lecithin; the preparation steps are as follows:

[0019] S1: Pass protective nitrogen into the reactor, add 1 / 5 of methyl acetate, then add dicarboxylic anhydride, phthalic anhydride, 1,2-propanediol, organotin catalyst, heat up to 140°C and stir for reaction, keep for 2h ; Continue to heat up to 150-165°C and stir the reaction for 1.5h; after the reaction, wait until the reaction solution is cooled to room temperature, and then remove the solvent by suction filtration to obtain a polyester resin;

[0020] S2: Put the polyester resin...

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PUM

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Abstract

The invention discloses improved polyester resin varnish and belongs to the technical field of coating production. The polyester resin varnish disclosed by the invention is prepared from the followingraw materials in parts by weight: 20 to 30 parts of dimethylbenzene anhydride, 40 to 75 parts of phthalic anhydride, 8 to 20 parts of 1,2-propylene glycol, 3 to 12 parts of polyethylene glycol, 1 to5 parts of organic tin catalyst, 70 to 130 parts of methyl acetate, 5 to 17 parts of nanoscale titanium dioxide powder, 3 to 9 parts of antiskinning agent and 2 to 7 parts of isothiazolone. A formulaof the polyester resin varnish disclosed by the invention is improved, so that the problem that existing resin varnish paint films are prone to yellowing and hardening, have high toxicity and the likeis solved; the improved polyester resin varnish has the advantages of environmental friendliness, low toxicity, good antibacterial performance and stable quality.

Description

Technical field [0001] The invention belongs to the technical field of paint production, and specifically relates to an improved polyester resin varnish. Background technique [0002] Polyester resin paint is a solvent-free paint with unsaturated polyester and styrene as the main film-forming substances. Its characteristics are: it can be cured at high temperature or at room temperature (the construction temperature is not less than 15 degrees), and the drying speed is fast. The paint film is plump and thick, with good gloss, exposure and transparency. The paint film has high hardness, wear resistance, heat resistance, cold resistance, water resistance, and resistance to many chemicals. The solid content is high, and the thickness of the paint film can reach 200-300μm at one time. During curing, the solvent evaporates less and pollution is less. The shortcomings of the existing polyester resin varnishes are: poor adhesion, poor stability, and impact resistance. Most of them ar...

Claims

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Application Information

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IPC IPC(8): C09D167/02C09D5/14C09D7/61C09D7/46C09D7/63C09D7/65C08G63/181
CPCC09D167/02C08G63/181C08K2003/2241C08K2201/011C09D5/14C08L71/02C08K3/22
Inventor 黄岳娇
Owner 黄岳娇
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