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Double side coated solvent-free polyurethane laminating adhesive as well as preparation method, coating process and application thereof

A solvent-free polyurethane, double-sided coating technology, applied to polyurea/polyurethane adhesives, devices for coating liquids on surfaces, chemical instruments and methods, etc., to achieve increased production speed, low maintenance costs, and reduced energy consumption Effect

Inactive Publication Date: 2017-05-31
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

[0008] One of the technical problems to be solved by the present invention is to provide a solvent-free polyurethane laminating adhesive coated on both sides to solve the problem that the existing solvent-free laminating adhesive needs to be pre-mixed before coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The synthesis of embodiment 1 A-1

[0055] Put 60 parts of polyethylene glycol with a molecular weight of 2000 and 13 parts of polyoxypropylene triol with a molecular weight of 400 into a reaction vessel, heat to 115°C for vacuum dehydration for 2 hours, cool down to below 60°C and add 170 parts of MDI, the prepolymer after heating up to 80°C for 2 hours is used as the first component of the reaction. Hereinafter referred to as A-1.

Embodiment 2

[0056] The synthesis of embodiment 2 A-2

[0057] Put 60 parts of polyethylene glycol with a molecular weight of 1000, 20 parts of castor oil-modified triols with a molecular weight of 900, and 1.5 parts of trimethylolpropane into a reaction vessel, and heat to 115°C under vacuum Dehydrate for 2 hours, lower the temperature to below 60°C, add 150 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-2.

Embodiment 3

[0058] The synthesis of embodiment 3 A-3

[0059] 60 parts of polyethylene glycol with a molecular weight of 1000, 20 parts of castor oil-modified trihydric alcohols with a molecular weight of 900, 1.5 parts of trimethylolpropane, and 15 parts of bisphenol A epoxy resin were packed Put it into a reaction container, heat it to 115°C for 2 hours, and add 150 parts of MDI when the temperature is lowered to below 60°C, then heat up to 105°C and react for 2 hours. The prepolymer is used as the first component of the reaction. Hereinafter referred to as A-3.

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Abstract

The invention discloses a double side coated solvent-free polyurethane laminating adhesive, which comprises a component A and a component B, wherein the component B is prepared from one or a mixture of any two or above of polylol a of which the carbon chain length is C12 or below, polylol b with at least two degrees of functionality and above, vegetable oil modified polylol c, epoxy resin, acrylic resin and silicane resin, and a curing speed regulator d; besides being prepared from these ingredients, the component A is also prepared from a polyurethane prepolymer generated by the reaction of aromatic and / or aliphatic and / or alicyclic diisocyanate. The invention also discloses a preparation method, a coating process and application of the double side coated solvent-free polyurethane laminating adhesive. The problem that an existing solvent-free laminating adhesive needs to be previously mixed before being coated is solved.

Description

technical field [0001] The invention relates to an adhesive suitable for composite flexible packaging (food, medicine and cosmetics), in particular to a double-sided coated solvent-free polyurethane laminating adhesive and its preparation method, coating process and application. 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 film is printed inside, the q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/76C08G18/66C08G18/48C08G18/58C08G18/62C08G18/36C08G18/32C08G18/12B32B37/12B32B38/00B05D7/24
CPCB05D7/24B32B37/12B32B38/0008B32B2037/1269C08G18/12C08G18/3206C08G18/36C08G18/4045C08G18/4804C08G18/58C08G18/6216C08G18/6696C08G18/7671C09J175/08C08G18/6692C08G18/6674
Inventor 赵有中邹斌刘嘉楠姚其胜
Owner 康达新材料(集团)股份有限公司
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