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Polyurethane adhesive with three-dimensional structure and preparation method thereof

A polyurethane adhesive, three-dimensional structure technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of insufficient bonding performance of adhesives, low shear strength of adhesives, etc., and achieves short synthesis time. The synthesis conditions are mild and controllable, and the production operability is strong.

Inactive Publication Date: 2020-09-25
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the test results of the polyurethane adhesive, the maximum initial tack is 2.8N / mm, and the maximum peel strength is 4.8N / mm. The bonding performance of the adhesive is not enough, and the shear strength of the adhesive is also low.

Method used

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  • Polyurethane adhesive with three-dimensional structure and preparation method thereof
  • Polyurethane adhesive with three-dimensional structure and preparation method thereof
  • Polyurethane adhesive with three-dimensional structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The polyurethane adhesive with three-dimensional structure provided in this example includes polyol, polyisocyanate, solvent, catalyst, chain extender, terminator, viscosity modifier and cellosolve, and the contents of each component are shown in Table 1.

[0043] in,

[0044] The polyester polyol adopting molecular weight is the polyester polyol of 3000 (from Asahikawa Chemical Company, the trade mark is SH3000B) and the polyester polyol with molecular weight of 2000 (from Asahikawa Chemical Company, the trade mark is SH2000B);

[0045] Polyisocyanate adopts MDI;

[0046] Solvents include N,N-dimethylformamide, toluene, dimethyl carbonate;

[0047] The catalyst adopts stannous octoate;

[0048] Chain extenders include ethylene glycol, 1,4-butanediol, and trimethylolpropane;

[0049] Terminators use ethylene glycol and isopropanol.

[0050] Viscosity modifier adopts acetone;

[0051] Cellosolve uses ethylene glycol monomethyl ether.

[0052] The preparation method...

Embodiment 2

[0060] The difference between Example 2 and Example 1 is that the polyols include polyester polyols with a molecular weight of 3000 and polyether polyols with a molecular weight of 2000 (sourced from China Taiwan Dalian Company, brand name PTMG2000). In this example, the content of each component is shown in Table 1.

Embodiment 3

[0062] The difference between Example 3 and Example 1 is that the polyols include polyester polyols with a molecular weight of 3000 and polyether polyols with a molecular weight of 1000 (sourced from Taiwan Dalian Company, trade name PTMG1000). In this example, the content of each component is shown in Table 1.

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Abstract

The invention relates to a polyurethane adhesive with a three-dimensional structure and a preparation method thereof. A raw material formula of the polyurethane adhesive comprises polyol, polyisocyanate, a solvent, a catalyst, a chain extender, a terminating agent, a viscosity regulator and a cellosolve, wherein the chain extender is a mixture of a bifunctional chain extender and a trifunctional chain extender; the polyol is one or more selected from polyether polyol with a molecular weight of 1000-2000 and polyester polyol with a molecular weight of 2000-3000. The preparation method comprisesthe following steps: directly reacting polyol with polyisocyanate; and then, conducting chain extension by using the specific chain extender to prepare the polyurethane adhesive with the three-dimensional structure. A linear structure and a winding structure related to the linear structure are arranged on a molecular chain segment of the polyurethane with the three-dimensional structure, and a stable three-dimensional structure is formed due to a reaction between active groups on different linear molecular chain segments, so the peel strength of the adhesive is obviously improved after the adhesive is cured, and the adhesive has better adhesive property.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a polyurethane adhesive with a three-dimensional structure and a preparation method thereof. Background technique [0002] Adhesives are rich in types and cover a wide range of fields. Most of today's adhesives are based on synthetic polymer compounds, and the adhesives made have good bonding performance and can be used in various bonding occasions. Polyurethane adhesives are polymer resins containing urethane groups (—NHCOO—) in molecular segments. Polyurethane adhesives are widely used in all aspects of modern economy, national defense and science and technology. It has a wide selection of raw materials, rich formula types, high requirements for synthesis technology, high production equipment and process requirements, and the properties of the synthesized products are also ever-changing. [0003] In the molecular structure of polyurethane, there are various pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C08G18/12C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/12C08G18/4018C08G18/4202C08G18/4854C08G18/6607C08G18/6611C08G18/664C08G18/6644C09J175/06C09J175/08C08G18/3206C08G18/3853
Inventor 董磊江平柳红毅
Owner XUCHUAN CHEM SUZHOU
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