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Trans-form double-component solvent-free polyurethane adhesive for composite film and preparation method thereof

A solvent-free polyurethane and adhesive technology, applied in polyurea/polyurethane adhesives, adhesive types, non-polymer adhesive additives, etc., can solve problems such as poor performance

Inactive Publication Date: 2018-03-09
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And such a component setting limits the performance of solvent-free adhesives in composite structures such as aluminum foil, aluminum foil boiled, steamed, and aluminized boiled.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The embodiment of the present invention also provides a preparation method of an adhesive for a trans two-component solvent-free polyurethane composite film, which is characterized in that the adhesive for the above-mentioned trans two-component solvent-free polyurethane composite film includes The following steps:

[0028] Prepare A component and B component respectively;

[0029] The preparation of component A is as follows: 100 parts by weight of polyester diol and 0.005 parts by weight of silane coupling agent are mixed evenly to form a hydroxyl component, which is component A;

[0030] Prepare group B as:

[0031] After mixing 50-70 parts by weight of polyether polyol, 2-8 parts by weight of trimethylolpropane and 100 parts by weight of isocyanate, keep it warm at 50-60°C for 1-2 hours, then raise the temperature to 80-90°C and keep it warm React for 3 to 4 hours, and the product is B component blocked by isocyanate;

[0032] The molar ratio of the functional gr...

Embodiment 1

[0043] This embodiment provides an adhesive for a trans two-component solvent-free polyurethane composite film. The preparation method is as follows, including: separately preparing component A composed of polyester diol and silane coupling agent and sealing with isocyanate end B component, where,

[0044] The preparation method of A component is as follows:

[0045] First prepare the used polyester diol of A component, the steps are as follows:

[0046] Adipic acid, isophthalic acid (the molar ratio of both is 2:1), neopentyl glycol, diethylene glycol (the molar ratio of both is 1:2), and the molar ratio of total alcohol to total acid is 1.2:1 , and 0.01% of tetra-n-butyl titanate and 0.013% of triphenyl phosphite accounting for the total weight of alcohol and acid are added to the esterification kettle, and the temperature is programmed to be kept at 160-170° C. for 3 hours, and 170-180° C. for 1 hour. 180-190°C for 1 hour, 190-200°C for 1 hour, 200-210°C for 1 hour, 210-2...

Embodiment 2

[0051] This embodiment provides an adhesive for a trans two-component solvent-free polyurethane composite film. The preparation method is as follows, including: separately preparing component A composed of polyester diol and silane coupling agent and sealing with isocyanate end B component, where,

[0052] The preparation method of A component is as follows:

[0053] First prepare the used polyester diol of A component, the steps are as follows:

[0054] Adipic acid, terephthalic acid (the molar ratio of both is 2:1), neopentyl glycol, 1,2-propanediol (the molar ratio of both is 4:11), the molar ratio of total alcohol to total acid is 1.3:1 , and 0.02% of tetra-n-butyl titanate and 0.02% of triphenyl phosphite accounting for the total weight of alcohol and acid are added to the esterification kettle, and the temperature is programmed to be kept at 160-170° C. for 3 hours, and 170-180° C. for 1 hour. 180-190°C for 1 hour, 190-200°C for 1 hour, 200-210°C for 1 hour, 210-220°C ...

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Abstract

The invention discloses a trans-form double-component solvent-free polyurethane adhesive for a composite film and a preparation method thereof. The adhesive is composed of a component A obtained by mixing polyester glycol and a silane coupling agent and an isocyanate-terminated component B, wherein the functional group mol ratio of the component A to the component B is 1 to (1.5 to 2.0). Accordingto the double-component solvent-free polyurethane adhesive disclosed by the invention, the composition is opposite to an existing solvent-free composition; the component A is changed into a hydroxylcomponent and the component B is changed into an isocyanate component; the trans-form double-component solvent-free polyurethane adhesive is environmentally friendly and no solvent is discharged; thetrans-form double-component solvent-free polyurethane adhesive is suitable for structures including a compound aluminum foil, aluminum foil water boiling, steaming, aluminum-plating water boiling andthe like; and the compound strength and other properties of the trans-form double-component solvent-free polyurethane adhesive are the same as those of a solvent type polyurethane adhesive, and the requirements of a soft package enterprise and food packages are met.

Description

technical field [0001] The invention relates to the field of polyurethane adhesives, in particular to an adhesive for a trans-type two-component solvent-free polyurethane composite film and a preparation method thereof. Background technique [0002] Due to the highly polar and chemically active carbamate groups (-NHCOO-) and isocyanate groups (-NCO) in polyurethane adhesives, it can be used with materials containing active hydrogen such as plastics, paper, metals and other smooth surfaces. All have excellent chemical adhesion. Composite flexible packaging is used in various fields of the national economy due to its superior performance and low price, such as food, beverage, medicine, cosmetics and electronic products. Composite flexible packaging is based on the performance needs of flexible packaging to carry out two or more layers of film together through adhesives. At present, due to people's emphasis on the hygienic and safety performance of food packaging and the coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/06C08G63/672C08G18/76C08G18/32C08G18/48C08G18/12C08G18/42C08G18/66
CPCC08G18/12C08G18/3206C08G18/4018C08G18/425C08G18/4825C08G18/6611C08G18/7671C08G63/672C08K5/526C08K5/5425C09J11/06C09J175/08C08G18/42
Inventor 唐本鑫田立云赫长生
Owner BEIJING COMENS NEW MATERIALS
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