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Non-solvent polyurethane laminating adhesive with high initial stick force and preparation method and application thereof

A technology of solvent-free polyurethane and initial tack, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as high initial tack and insufficient initial tack of solvent-free laminating adhesives

Active Publication Date: 2010-07-07
康达新材料(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is to provide a solvent-free polyurethane laminating adhesive with high initial tack to solve the problem of insufficient initial tack of the existing solvent-free laminating adhesive

Method used

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  • Non-solvent polyurethane laminating adhesive with high initial stick force and preparation method and application thereof
  • Non-solvent polyurethane laminating adhesive with high initial stick force and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1C-1

[0045] Synthesis of Example 1C-1

[0046] Put 60 parts of polyoxypropylene diol with a molecular weight of 2000, 13 parts of polyoxypropylene diol with a molecular weight of 400, and 2 parts of trimethylolpropane into a reaction vessel, and heat to 115°C for vacuum dehydration for 2 hours Add 110 parts of MDI and 14 parts of TDI after cooling down to below 60°C, heat up to 80°C for 2 hours, then cool down the temperature of the prepolymer below 60°C, add 140 parts of hydroxypropyl methacrylate, and heat up to 75°C for reaction After 2 hours, add 7 parts of photoinitiator 1173 to obtain component C, hereinafter referred to as C-1.

Embodiment 2C-2

[0047] Synthesis of Example 2C-2

[0048] Add 8 parts of photoinitiator 1173 to 100 parts of 1,3-butanediol diacrylate and 100 parts of hydroxyethyl methacrylate, and mix well to obtain component C, hereinafter referred to as C-2.

Embodiment 3A-0

[0049] Synthesis of Example 3A-0

[0050] Put 60 parts of polyoxypropylene diol with a molecular weight of 2000, 10 parts of castor oil-modified trihydric alcohol with a molecular weight of 900, and 1.5 parts of trimethylolpropane into a reaction vessel and heat to 115°C Vacuum dehydration for 2 hours, lower the temperature to below 60°C, add 90 parts of MDI, and raise the temperature to 80°C for 2 hours to react the prepolymer as the first component of the reaction, hereinafter referred to as A-0.

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Abstract

The invention relates to a non-solvent polyurethane laminating adhesive with high initial stick force and a preparation method and application thereof. The laminating adhesive comprises a first component and a second component, wherein the first component comprises a component A, and the second component comprises a component B. The first component and the second component also comprise a component C independently or simultaneously, and the component C accounts for 1wt%-40wt% of the total weight of the first component and the second component. The component C is prepared by producing a prepolymer of acrylic acid and polyurethane through reaction of the component A with acrylic acid, methacrylic acid, and the like. with 1-5 functionalities and one or more than one mixture of ester monomer compounded by alcohols lower than C18, and adding a light trigger which is 0.1wt%-15wt% of the ester monomer, wherein the ester monomer accounts for 0wt%-100wt% of the total weight of the ester monomer and the component A. Ultraviolet light irradiation with a certain intensity is applied after coating and before compounding the non-solvent polyurethane laminating adhesive so as to achieve the purposes of quickly increasing molecular weight and viscosity in a short time and enhancing initial stick force. Compared with the traditional non-solvent polyurethane laminating adhesives, the laminatingadhesive of the invention has higher initial stick force.

Description

technical field [0001] The invention relates to a solvent-free polyurethane laminating adhesive suitable for composite flexible packaging (food, medicine and cosmetics), in particular to a solvent-free polyurethane laminating adhesive with high initial tack and a preparation method and application thereof. Background technique [0002] At present, most domestic composite film manufacturers use solvent-based adhesives for dry lamination to produce films. Due to the use of intermediate layer adhesives, there is a small amount of solvent residue in the lamination process, which will cause odors in the packaging. Poor hygienic performance. [0003] Solvent-free lamination is a method of laminating two substrates together with a solvent-free adhesive, also known as reactive lamination. Since the adhesive used for solvent-free lamination does not contain solvents, the final composite film product will not pollute the packaged content due to residual solvents; when the composite f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08J5/12B32B37/12
Inventor 陆企亭侯一斌赵有中
Owner 康达新材料(集团)股份有限公司
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