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Preparation method of photocurable polyurethane modified wood lacquer

A polyurethane modification and wood lacquer technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of uneven curing, easy cracking and peeling, uneven dispersion effect of unsaturated polyester wood lacquer, etc. Structural integrity, increased cure speed, and uniform results

Inactive Publication Date: 2018-10-16
安徽名士达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the existing unsaturated polyester wood lacquer is at low temperature, the initiator triggers slowly, the curing cycle is long, causes the volatilization cycle to be long, and the situation of curing unevenness occurs; and the dispersion effect of the unsaturated polyester wood lacquer is not uniform in the use process , prone to cracking and peeling

Method used

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  • Preparation method of photocurable polyurethane modified wood lacquer

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] The present invention provides a kind of preparation method of photocurable polyurethane modified wood varnish, and described preparation method comprises the following steps,

[0022] (1) After dehydrating 14 parts of polyether diol, the dehydration conditions are: temperature: 115°C, vacuum degree: 1.33MPa, dehydration time: 2h; add 5 parts of 1 part of butanediol and 9 parts of trimethylolpropane mono Allyl ether, heated to 74°C, with a stirring speed of 60r / min;

[0023] (2) Add 55 parts of 2,4-toluene diisocyanate to the mixture in step (1), keep the temperature at 74°C, stir at 60r / min, and react for 2h;

[0024] (3) Add 2-11 parts of dimethylolpropionic acid to the mixed solution after the reaction in step (2), continue heating, keep the temperature at 74°C, and keep the stirring speed at 60r / min for 4.5h;

[0025] (4) The solution in the step (3) is distilled under reduced pressure, and the crystals are washed to obtain polyurethane solid crystals;

[0026] (5...

Embodiment 2

[0028] The present invention provides a kind of preparation method of photocurable polyurethane modified wood varnish, it is characterized in that, described preparation method comprises the following steps,

[0029] (1) After dehydrating 15 parts of polyether diol, the dehydration conditions are: temperature: 125°C, vacuum degree: 1.33MPa, dehydration time: 2h; add 10 parts of 1-4 butanediol and 15 parts of trimethylolpropane Monoallyl ether, heated to 80°C, with a stirring speed of 75r / min;

[0030] (2) Add 65 parts of 2,4-toluene diisocyanate to the mixture in step (1), keep the temperature at 80°C, stir at 80r / min, and react for 2h;

[0031] (3) Add 11 parts of dimethylolpropionic acid to the mixed solution after the reaction in step (2), continue heating, keep the temperature at 80°C, and keep the stirring speed at 80r / min for 4.5h;

[0032] (4) The solution in the step (3) is distilled under reduced pressure, and the crystals are washed to obtain polyurethane solid crys...

Embodiment 3

[0035] The present invention provides a kind of preparation method of photocurable polyurethane modified wood varnish, and described preparation method comprises the following steps,

[0036] (1) After dehydrating 14-15 parts of polyether diol, the dehydration conditions are: temperature 120°C, vacuum degree: 1.33MPa, dehydration time: 2h; add 7 parts of 1-4 butanediol and 12 parts of trimethylol Propane monoallyl ether, heated to 74-80°C, stirring at 67r / min;

[0037] (2) Add 60 parts of 2,4-toluene diisocyanate to the mixture in step (1), keep the temperature at 77°C, stir at 70r / min, and react for 2h;

[0038] (3) Add 2-11 parts of dimethylolpropionic acid to the mixed solution after the reaction in step (2), continue heating, keep the temperature at 77°C, and keep the stirring speed at 70r / min for 4.5h;

[0039] (4) The solution in the step (3) is distilled under reduced pressure, and the crystals are washed to obtain polyurethane solid crystals;

[0040] (5) 62 parts of...

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Abstract

The invention discloses a preparation method of a photocurable polyurethane modified wood lacquer. The preparation method comprises the following steps: (1) adding 1-4butanediol and trimethylolpropanemonallyl ether after dehydrating polyether glycol, heating, and stirring evenly; (2) adding 2,4-toluene diisocynate in a mixture in the step (1), keeping the temperature at 74-80 DEG C and the stirring speed at 60-80 r / min, and reacting for 2 hours; (3) adding dimethylolpropionic acid into a reacted mixed solution in the step (2), continuing to heat, keeping the temperature at 74-80 DEG C and thestirring speed at 60-80 r / min, and maintaining for 4.5 hours; (4) distilling the solution obtained in the step (3) at the reduced pressure, washing, and crystallizing, thereby obtaining a polyurethane solid crystal; (5) mixing polyurethane, methacrylic acid, a wetting agent, a defoamer, a dust preventive, a delustering agent, a pH neutralizer, 2,4,6-trimethyl benzoyl ethyl phenylphosphonate, styrene, a rheological agent and water, and stirring evenly, thereby obtaining a finished product of the wood lacquer.

Description

technical field [0001] The invention relates to the preparation technology of wood lacquer, in particular to a preparation method of photocurable polyurethane modified wood lacquer. Background technique [0002] With the rapid development of the furniture industry, people put forward higher requirements for the protection and decoration of furniture coatings. High-end furniture with wood grain has become the mainstream of the development of the furniture industry today. Unsaturated polyester wood primer has the characteristics of high fullness, high hardness, good transparency, and not easy to collapse. It has excellent product performance and improves the grade of furniture coating. But the existing unsaturated polyester wood lacquer is at low temperature, the initiator triggers slowly, the curing cycle is long, causes the volatilization cycle to be long, and the situation of curing unevenness occurs; and the dispersion effect of the unsaturated polyester wood lacquer is no...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/63C09D7/61C09D7/65C08G18/32C08G18/34C08G18/48C08G18/66C08G18/67C08G18/76
CPCC08G18/0823C08G18/3206C08G18/348C08G18/4825C08G18/6692C08G18/675C08G18/7614C09D7/61C09D7/63C09D7/65C09D175/14C08L1/02C08K13/02C08K5/5419C08K3/346C08K3/36C08K5/5333
Inventor 吴浩
Owner 安徽名士达新材料有限公司