Quick-drying solvent-free polyurethane adhesive and preparation method thereof

A polyurethane adhesive and solvent-free technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problem of long residual time of primary aromatic amine, increased friction coefficient of PE film, and many white spots on product appearance and other problems, to achieve the effect of large-scale industrial production and popularization and application, small strength attenuation, and excellent cooking performance

Inactive Publication Date: 2018-07-27
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are also a series of problems in the process of compounding with solvent-free polyurethane adhesives, such as low initial adhesion of the compound film, obvious increase in the friction coefficient of the PE film, long product aging time, many white spots on the appearance of the product, and first-class fragrance. Amine residual time is long, etc.

Method used

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  • Quick-drying solvent-free polyurethane adhesive and preparation method thereof
  • Quick-drying solvent-free polyurethane adhesive and preparation method thereof
  • Quick-drying solvent-free polyurethane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The synthesis of embodiment 1 A-1

[0060] Weight percent:

[0061] Polyether polyol (polyoxypropylene diol, hydroxyl value 112mg KOH / g) 30 parts 30%

[0062] Castor oil polyol (GR160, hydroxyl value 164mg KOH / g) 15 parts 15%

[0063] Polyisocyanate (MDI) 55 parts 55%

[0064] React the above-mentioned raw materials at 70°C for 4 hours to obtain the isocyanate-terminated prepolymer, which is component A; hereinafter referred to as A-1.

Embodiment 2

[0065] The synthesis of embodiment 2 A-2

[0066] Weight percent:

[0067] Polyester diol (polyester neopentyl adipate, hydroxyl value 112mg KOH / g) 10 parts 10%

[0068] Polyether polyol (polyoxypropylene diol, hydroxyl value 56mg KOH / g) 30 parts 30%

[0069] Polyisocyanate (MDI) 60 parts 60%

[0070] React each component at 75°C for 3 hours to obtain the isocyanate-terminated prepolymer, which is component A; hereinafter referred to as A-2.

Embodiment 3

[0071] The synthesis of embodiment 3 A-3

[0072] Weight percent:

[0073]

[0074] React the above-mentioned raw materials at 90°C for 2 hours to obtain the isocyanate-terminated prepolymer, which is component A; hereinafter referred to as A-3.

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Abstract

The invention discloses a quick-drying solvent-free polyurethane adhesive and a preparation method thereof. The quick-drying solvent-free polyurethane adhesive comprises an isocyanate-terminated prepolymer as a component A and a hydroxy compound as a component B, wherein the isocyanate-terminated prepolymer is generated from polyol and polyisocyanates through a reaction; the hydroxy compound as the component B is prepared from polyol, a chain extender, a crosslinking agent, a wetting agent, a leveling agent and an adhesion promotor. The quick-drying solvent-free polyurethane adhesive has the advantages of low viscosity, high curing speed, high peel strength and capabilities of being cut in two hours and resisting steaming at high temperature of 121 DEG C, and has good application prospectand market potential.

Description

technical field [0001] The invention relates to a solvent-free polyurethane adhesive and a preparation method thereof. Background technique [0002] In the composite processing of flexible packaging, the dry composite process has always occupied a dominant position due to its outstanding advantages such as high composite fastness, strong process adaptability, and wide application range. However, a large amount of solvent-based polyurethane adhesive and Thinner, not only the volatilization of the solvent will pollute the environment, but also the residual solvent in the packaging bag will pollute the food and have a negative impact on the health of consumers. As people pay more and more attention to the hygiene and safety of packaging materials and environmental protection, green and environmentally friendly solvent-free polyurethane adhesives, as a substitute for solvent-based laminating adhesives, are gradually becoming the new favorite in the field of composite flexible pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C09J175/14C08G18/48C08G18/67C08G18/42C08G18/12C08G18/50C08G18/32C08G18/66
CPCC08G18/12C08G18/36C08G18/4018C08G18/4238C08G18/4825C08G18/6607C08G18/6611C08G18/6674C08G18/6677C09J175/06C09J175/08C09J175/14C08G18/5024C08G18/3206
Inventor 戴胜朱彦肖丽群蒋树会唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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