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Single-component polyurethane hot-melt adhesive for paper-plastic lamination and preparation method thereof

A polyurethane adhesive and polyurethane adhesive technology are applied in the field of polyurethane to achieve the effects of good temperature resistance and good initial strength

Inactive Publication Date: 2017-09-15
南通恒华粘合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a temperature-resistant single-component reactive polyurethane hot-melt adhesive and its preparation method for the defects of the existing common adhesives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the polyurethane hot-melt adhesive for paper-plastic composite of this embodiment, its steps are as follows:

[0030] (1) Take 10 parts by weight of polyether polyol, 15 parts by weight of crystalline polyester polyol, 35 parts by weight

[0031] Amorphous polyester polyol, 3 parts by weight of a chain extender are added to the reactor, and vacuum dehydration is carried out at 110°C-120°C for 1.5h-2h;

[0032] (2) Cool down to 65°C, and add 37 parts by weight of isocyanate while stirring;

[0033] (3) Slowly heat up to 80°C-85°C, vacuum defoaming reaction for 60min;

[0034] (4) Add 0.001 parts by weight of the catalyst, then vacuumize until no bubbles appear, and test the viscosity and

[0035] NCO%;

[0036] (5) After the viscosity and NCO% are qualified, discharge, seal and pack to get the product.

[0037] The polyether polyol in this embodiment is polyoxypropylene diol and polytetrahydrofuran ether diol, and its average weight-average ...

Embodiment 2

[0059] The preparation method of the polyurethane hot-melt adhesive for paper-plastic composite of this embodiment, its steps are as follows:

[0060](1) Take 14 parts by weight of crystalline polyester polyol, 50 parts by weight of amorphous polyester polyol, and 1 part by weight of chain extender into the reactor, and vacuum dehydrate at 110°C-120°C for 1.5h-2h;

[0061] (2) Cool down to 65°C, and add 35 parts by weight of isocyanate while stirring;

[0062] (3) Slowly heat up to 80°C-85°C, vacuum defoaming reaction for 60min;

[0063] (4) Add 0.001 parts by weight of the catalyst, then vacuumize until no bubbles appear, and test the viscosity and

[0064] NCO%;

[0065] (5) After the viscosity and NCO% are qualified, discharge, seal and pack to get the product.

[0066] The amorphous polyester polyol in this embodiment is a special polyester polyol based on adipic acid-isohexanediol-propylene glycol, and its average weight-average molecular weight is 500-1500.

[0067] ...

Embodiment 3

[0087] The preparation method of the polyurethane hot-melt adhesive for paper-plastic composite of this embodiment, its steps are as follows:

[0088] (1) Add 63 parts by weight of amorphous polyester polyol into the reaction kettle, and vacuum dehydrate at 110°C-120°C for 1.5h-2h;

[0089] (2) Cool down to 65°C, and add 37 parts by weight of isocyanate while stirring;

[0090] (3) Slowly heat up to 80°C-85°C, vacuum defoaming reaction for 60min;

[0091] (4) Add 0.001 parts by weight of the catalyst, then vacuumize until no bubbles appear, and test the viscosity and

[0092] NCO%;

[0093] (5) After the viscosity and NCO% are qualified, discharge, seal and pack to get the product.

[0094] The amorphous polyester polyol in this embodiment is a special polyester polyol based on adipic acid-diethylene glycol-propylene glycol, and its average weight-average molecular weight is 500-1500.

[0095] In this example, the isocyanate is a mixture of 2,4-diphenylmethane diisocyanate...

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Abstract

The invention specifically relates to a single-component polyurethane hot-melt adhesive for paper-plastic lamination and a preparation method thereof, belonging to the technical field of polyurethane. The hot-melt adhesive is prepared by reacting crystalline polyester polyol, amorphous polyester polyol, polyether polyol and a chain extender with isocyanate. The moisture-cured type single-component polyurethane hot-melt adhesive has high initial bonding strength, good finished-product friction coefficient and excellent temperature toleration and is applicable to flow line production; and the hot-melt adhesive has excellent environmental protection performance and is applicable to lamination of a variety of paper and plastic films.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a one-component polyurethane hot-melt adhesive for paper-plastic composite and a preparation method thereof. Background technique [0002] Paper-plastic composite is to compound a layer of plastic film on the surface of paper-based printed matter. It is a composite material commonly used in the printing industry. It combines the advantages of paper and plastic. It is waterproof, durable and highly decorative, so that the text and patterns are effectively protected. . With the development of market economy and the improvement of consumption level, film covering is quite extensive. It has a history of more than 30 years in foreign countries and 20 years in China. Composite glue is a key factor affecting the quality of the film. [0003] At present, the paper-plastic composite adhesives used in China are mostly solvent-based, water-based, and hot-melt types. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J175/08C08G18/66C08G18/48C08G18/42C08G18/40
CPCC08G18/4018C08G18/4202C08G18/4238C08G18/425C08G18/4808C08G18/4825C08G18/4854C08G18/6611C08G18/6644C09J175/04C09J175/06C09J175/08
Inventor 张俊
Owner 南通恒华粘合材料科技有限公司
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