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Coating process of water-based plastic substitute

A coating process and plastic technology, applied in the field of paper and plastic processing, can solve the problems of foaming, white pollution, circulating beating, and wrinkling.

Pending 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

[0028] Aqueous coating process of aqueous plastic, including the following steps:

[0029] (1) Synthesis of polyester polyol: It is weighed with a reaction monomer, a first catalyst, and xylene, and the number of reaction monomers comprises 13.8 parts of adipic acid, 1,4-cyclohexane dimethanol 7.6 parts. The 2,2-dimethyl-1,3-propanediol was 6.8 parts of 1,4-butanediol, and the reaction monomer was added in the reaction kettle and was mixed to 110 ° C, then the first catalyst and the second Toluene, warmed to 200 ° C, thermal insulation reaction for 4 h, cooling to 145 ° C and vacuum, and the acid value is less than 1 mgKOH / g stop heating, i.e., the polyester polyol;

[0030] (2) Synthesis of polyurethane acrylate prepolymer: 13.5% of isophorone diisocyanate, 12%, and 5.5% acrylate obtained by step (1) by weight, step (1), 5.5% acrylate, hydrophilic expansion Chain agent 1.5%, trihydroxypropane 1.5%, second catalyst 0.02%, neutralizing agent 1.5%, defoamer 0.2% and water residual...

Embodiment 2

[0042] Aqueous coating process of aqueous plastic, including the following steps:

[0043] (1) Synthesis of polyester polyol: It is weighing the reaction monomer, the first catalyst, and xylene, the reaction monomer, the number, including adiparate, 1,4-cyclohexane dimethanol 7.3 parts. The 2,2-dimethyl-1,3-propanediol was 6.6 parts of 1,4-butanediol 3.4 parts, and the reaction monomer was added in the reaction kettle and mixed to 100 ° C, then the first catalyst and the second Toluene, warmed to 180 ° C, heat insulation reaction for 3 h, cool down to 140 ° C, and the acid value is less than 1 mg kOH / g stop heating, that is, the polyester polyol is obtained.

[0044] (2) Synthesis of polyurethane acrylate prepolymer: 12% of isophorone diisocyanate by weight, and step (1), 4%, 4% acrylate, hydrophilic expansion Chain agent 1-2%, trihydroxymethyl propane 1%, second catalyst 0.01%, neutralizing agent 1%, antifoaming agent 0.1%, and water consumption, isous ketone di isocyanate, pol...

Embodiment 3

[0056] Aqueous coating process of aqueous plastic, including the following steps:

[0057] (1) Synthesis of polyester polyols: Time of reaction monomers, first catalysts and xylene, the reaction monomer massaged by 15.5 parts of adipic acid, 7.9 parts of 1,4-cyclohexane dimethanol. 3. The 2,2-dimethyl-1,3-propanediol is 3.8 parts of 1,4-butanediol, and the reaction monomer is added in the reaction kettle and mixed to 120 ° C, then the first catalyst and the second Toluene, warmed to 220 ° C, thermal insulation reaction from 3 to 5 h, cooling to 150 ° C, and the acid value is less than 1 mgKOH / g stop heating, i.e., the polyester polyol;

[0058] (2) Synthesis of polyurethane acrylate prepolymer: Take the isophorone diisocyanate 15%, step (1) 13%, 7% acrylate, 7% acrylate, hydrophilic expansion Chain agent 1-2%, trihydroxymethyl propane 2%, second catalyst 0.1%, neutralizing agent 2%, antifoaming agent 0.3%, and water residual amount, isophorone diisocyanate, polyfluolone diisocya...

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Abstract

The invention relates to the technical field of paper plastic processing, in particular to a coating process of water-based plastic substitute. The invention 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, in addition, excessive isocyanate with a cyclic monomer is adopted to react with polyester polyol, so that the tensile strength of the polyurethane is improved, and the tensile strength of the polyurethane is improved. The further initiation of the cyclic monomer can improve the strength and water resistance of the coating, then the cyclic monomer reacts with hydroxyethyl acrylate and a hydrophilic chain extender to form a polyurethane acrylate aqueous system, the system has good emulsion stability, and an adhesive film with good hardness, flexibility, adhesiveness, after-tack resistance and water resistance can be rapidly formed through photocuring.

Description

Technical field [0001] The present invention relates to the field of paper-plastic processing, and more particularly to a coating process of aqueous replacement plastic. Background technique [0002] The traditional paper is used as a paper-plastic film material, and the binder is applied to the plastic film by a roll coating device, heating through a hot pressing roller, so that the film is softened, and then the printing of the substrate and the film are compressed, formed. Paper-placardized film product. However, it will have wrinkles, bubbles, finished curls in the production process, and it is also easy to cause white pollution and circulating pulp. Inventive content [0003] In order to overcome the disadvantages and insufficient shortcomings in the prior art, it is an object of the present invention to provide a coating process of aqueous replacement plastic, an aqueous UV cured coating replaces conventional glue thermally cured film technology. [0004] The object of the...

Claims

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Application Information

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IPC IPC(8): C09D175/14C08G18/67C08G18/66C08G18/42C08G18/32C08G18/34B05D7/24B05D3/06
CPCC09D175/14C08G18/672C08G18/423C08G18/3206C08G18/348B05D7/24B05D3/067C08G18/6659
Inventor 赵建国
Owner 东莞市冠力胶业有限公司
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