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Unsaturated polyester resin for coating and preparation method thereof

A polyester resin and unsaturated technology, which is applied in the field of unsaturated polyester resin for coating and its preparation, can solve the problems that the gel time and the surface drying time cannot be perfectly matched, the production efficiency is affected, and the desktop is easy to shrink. Controllable curing process, good mechanical properties, smooth surface without shrinkage

Inactive Publication Date: 2019-08-27
华砻树脂股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The gel time and dry time cannot be perfectly matched
To achieve the surface dry time, the gel is too fast and not suitable for manual operation; to achieve the gel time suitable for workers to operate, the surface dry is not good, which affects production efficiency
[0006] 2. Due to the needs of defoaming and leveling, the viscosity of the coating is generally small, and it is easy to shrink after bonding, which makes the tabletop easy to crack when it is resistant to freezing and heat.
[0007] 3. The coating resin is a pure resin coating with relatively high hardness. It is easy to occupy powder when polishing, and it is not easy to polish

Method used

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  • Unsaturated polyester resin for coating and preparation method thereof
  • Unsaturated polyester resin for coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Coating unsaturated polyester resin of the present invention, its preparation method comprises the steps:

[0051] (1) Add ethylene glycol and fumaric acid into the reactor at a molar ratio of 1:1 for polycondensation reaction, raise the temperature to 160°C, keep warm until the water comes out, then heat up to 200°C, and continue to keep warm until the acid value is 50mgKOH / g , vacuumize the reactor until the vacuum degree in the reactor is 0.85MPa, react to the acid value of 25mgKOH / g, add hydroquinone to stop the polycondensation reaction, the addition of hydroquinone is 0.02% of the total mass of the reaction substance %, to obtain unsaturated polyester resin, cooled to 130 ℃, for subsequent use;

[0052] (2) adding ethanol in styrene, the mass ratio of styrene and ethanol is 100:1, stirs evenly, obtains styrene mixed solution;

[0053] (3) Slowly add the styrene mixed solution of 100g of step (2) into the unsaturated polyester resin of 1000g of step (1) for diluti...

Embodiment 2

[0056]Coating unsaturated polyester resin of the present invention, its preparation method comprises the steps:

[0057] (1) Add diethylene glycol and phthalic acid into the reactor at a molar ratio of 1:1.05 to carry out polycondensation reaction, heat up to 162°C, keep warm until the water comes out, then heat up to 202°C, continue to keep warm until the acid value is 52mgKOH / g, Vacuumize the reaction kettle until the vacuum in the reaction kettle is 0.84MPa, react until the acid value is 27mgKOH / g, add o-phthaloquinone to stop the polycondensation reaction, and the addition of o-phthaloquinone is 0.04% of the total mass of the reaction substances , to obtain unsaturated polyester resin, lower the temperature to 132°C, and set aside;

[0058] (2) Add ethanol and acrylic acid in styrene, the mass ratio of styrene, ethanol, acrylic acid is 100:30:3, stir well, obtain styrene mixed solution;

[0059] (3) Slowly add the styrene mixed solution of 500g of step (2) into the unsatu...

Embodiment 3

[0062] Coating unsaturated polyester resin of the present invention, its preparation method comprises the steps:

[0063] (1) Add propylene glycol and maleic acid to the reactor at a molar ratio of 1:1.02 to carry out polycondensation reaction, heat up to 161°C, keep warm until the water comes out, then heat up to 201°C, and continue to keep warm until the acid value is 51mgKOH / g. Reactor carries out vacuumizing operation to the vacuum degree in reactor is 0.83MPa, reacts to acid value 26mgKOH / g, adds methyl hydroquinone to stop polycondensation reaction, the add-on of methyl hydroquinone is 0.03% of reaction substance gross mass, Obtain unsaturated polyester resin, cool down to 131°C, and set aside;

[0064] (2) Add ethanol and acrylic acid to styrene, the mass ratio of styrene, ethanol, acrylic acid is 100:3:2, stir well, obtain styrene mixed solution;

[0065] (3) Slowly add the styrene mixed solution of 240g of step (2) into the unsaturated polyester resin of 1200g of ste...

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Abstract

The invention discloses unsaturated polyester resin for a coating. The unsaturated polyester resin is prepared from modified unsaturated polyester resin, a defoaming agent, an accelerator, a filler and a curing agent. A preparation method of the unsaturated polyester resin comprises the steps that polyhedric alcohols and polyatomic acid / anhydride are added into a reaction kettle for performing condensation polymerization to obtain unsaturated polyester resin, a styrene mixing solution is added for performing dilution, the modified unsaturated polyester resin is obtained, the modified unsaturated polyester resin is placed into a high-speed dispersing machine, a component B, the defoaming agent and the accelerator are added and stirred till the materials are mixed to be uniform, a componentC is added, stirring continues to be performed, and uniform mixing is performed to obtain the unsaturated polyester resin for the coating. According to the unsaturated polyester resin for the coating,the matching degree of the gel time and the surface drying time is good, the dried surface is formed within a short period of time, the high-gloss and non-sticky polyester resin coating can be obtained, the problem that a traditional unsaturated polyester resin product is long in surface drying time (longer than 1.5 h) and is even not dried is effectively solved, and the production efficiency isimproved.

Description

technical field [0001] The invention relates to an unsaturated polyester resin for coating and a preparation method thereof. Background technique [0002] Resin refers to the polymer raw materials used in the manufacture of plastic products, and polyester refers to the polymer formed by the polycondensation reaction of dicarboxylic acid and dihydric alcohol. Polyester resins can be divided into saturated polyester resins and unsaturated polyester resins. Unsaturated polyester resin [0003] At present, with the improvement of people's living standards and the rapid development of the real estate industry, the demand for dining tables and tea tables continues to increase; at the same time, natural resources are limited and cannot meet the needs of users. Artificial desktops and coffee tables can meet the needs of different customers with less use of natural resources through stickers and brushing the resin layer. [0004] When brushing the resin layer on the artificial des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D7/63C08G63/78C08G63/52
CPCC08G63/52C08G63/78C09D7/63C09D167/06C08K5/09C08K5/14C08K5/098
Inventor 李小林戴永斌吴汛燎
Owner 华砻树脂股份有限公司
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