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Waterborne polyurethane plastic substitute and preparation method thereof

A water-based polyurethane and plastic technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., which can solve problems such as curling, difficulty, and foaming of finished products

Inactive Publication Date: 2021-07-30
东莞市冠力胶业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the production process, wrinkles, foaming, and curling of the finished product will occur, and it is easy to cause problems such as white pollution and difficulty in circulating beating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method for water-based polyurethane replacement plastic, comprising the steps of:

[0025] (1) Synthesis of polyester polyol: take by weighing reaction monomer, first catalyst and dimethylbenzene, described reaction monomer comprises 8.1 parts of adipic acid, 11.5 parts of 1,4-cyclohexanedicarboxylic acid by mole fraction , 6.1 parts of 2,2-dimethyl-1,3-propanediol, 9.3 parts of 1,4-butanediol and 0.6 parts of trimethylolpropane, add the reaction monomers to the reaction kettle for mixing and raise the temperature to 110°C , then add the first catalyst and xylene, heat up to 200°C, keep the temperature for 5 hours, cool down to 145°C and vacuumize, stop heating after the acid value is lower than 1mgKOH / g, and obtain the polyester polyol;

[0026] (2) Synthetic of polyurethane: take by weight percentage isophorone diisocyanate 11.5%, hexamethylene diisocyanate 16%, the polyester polyol 20% that step (1) makes, polycaprolactone diol 7.5%, hydrophilic chain ...

Embodiment 2

[0034] A preparation method for water-based polyurethane replacement plastic, comprising the steps of:

[0035] (1) Synthesis of polyester polyol: take by weighing reaction monomer, first catalyst and xylene, described reaction monomer comprises 6.7 parts by mole of adipic acid, 11.2 parts of 1,4-cyclohexanedicarboxylic acid , 5.8 parts of 2,2-dimethyl-1,3-propanediol, 9.0 parts of 1,4-butanediol and 0.5 parts of trimethylolpropane, add the reaction monomer to the reaction kettle for mixing and raise the temperature to 100°C , then add the first catalyst and xylene, heat up to 180°C, keep the temperature for 3 hours, cool down to 140°C and vacuumize, stop heating after the acid value is lower than 1mgKOH / g, and obtain the polyester polyol;

[0036](2) Synthesis of polyurethane: take 10% isophorone diisocyanate, 15% hexamethylene diisocyanate, 15% polyester polyol and polycaprolactone diol prepared in step (1) by weight percentage 5%, hydrophilic chain extender 2%, trimethylol...

Embodiment 3

[0044] A preparation method for water-based polyurethane replacement plastic, comprising the steps of:

[0045] (1) Synthesis of polyester polyol: take by weighing reaction monomer, first catalyst and dimethylbenzene, described reaction monomer comprises 8.5 parts of adipic acid, 12.8 parts of 1,4-cyclohexanedicarboxylic acid by mole fraction , 6.4 parts of 2,2-dimethyl-1,3-propanediol, 9.6 parts of 1,4-butanediol and 0.7 parts of trimethylolpropane, add the reaction monomers into the reaction kettle for mixing and raise the temperature to 120°C , then add the first catalyst and xylene, heat up to 220°C, keep the temperature for 7 hours, cool down to 150°C and vacuumize, stop heating after the acid value is lower than 1mgKOH / g, and obtain the polyester polyol;

[0046] (2) Synthesis of polyurethane: take isophorone diisocyanate 13%, hexamethylene diisocyanate 17%, step (1) made polyester polyol 25%, polycaprolactone diol by weight percentage 10%, hydrophilic chain extender 4%...

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Abstract

The invention relates to the technical field of paper plastic processing, in particular to a waterborne polyurethane plastic substitute and a preparation method thereof. The method is improved from polyol, and polyester polyol is selected between polyether polyol and polyester polyol. Although polyurethane synthesized by polyether polyol has better flexibility and hydrolysis resistance, polyurethane synthesized by polyester polyol has stronger cohesive energy and more excellent after-tack resistance, and moreover, single isocyanate or polyol is not adopted, so that the disorder of soft and hard segments of polyurethane is further improved, and the flexibility and after-tack resistance of the coating are improved. Isophorone diisocyanate with an asymmetric structure and hexamethylene diisocyanate with a symmetric structure are selected for isocyanate selection, the isophorone diisocyanate can improve the strength and water resistance of the coating, and the hexamethylene diisocyanate can improve the adhesiveness and flexibility of the coating, so that the coating has better comprehensive performance by the matching of the two components.

Description

technical field [0001] The invention relates to the technical field of paper-plastic processing, in particular to a water-based polyurethane replacement plastic and a preparation method thereof. Background technique [0002] Traditional paper is made of paper-plastic lamination material, and the adhesive is coated on the plastic film by a roller coating device, heated by a hot-pressing roller to soften the film, and then the printed matter coated with the primer and the film are pressed together to form a Paper-plastic laminated product. However, during the production process, wrinkles, foaming, and curling of the finished product will occur, and it is easy to cause problems such as white pollution and difficulty in beating in circulation. Contents of the invention [0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a high water-based polyurethane replacement plastic and its preparation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/42C08G18/66C08G18/32C08G18/34C09J175/06
CPCC08G18/12C08G18/6659C08G18/423C08G18/4277C08G18/4202C09J175/06C08G18/348C08G18/3857C08G18/3228
Inventor 赵建国
Owner 东莞市冠力胶业有限公司
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