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Two-component polyurethane adhesive

A two-component polyurethane and adhesive technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve problems such as low composite fastness, high viscosity, and increased friction coefficient, and achieve good flow The effects of leveling and ink matching, excellent adhesion and heat resistance, and excellent overall performance

Active Publication Date: 2020-02-25
WANHUA CHEM BEIJING +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Patent CN106675499A discloses a solvent-free two-component polyurethane cooking glue and its preparation method. Although this technology improves the cooking performance, it does not solve the problem of low composite fastness on special structures, and its system will lead to obvious friction coefficients. elevated problem
[0005] Patent CN101597470A discloses a solvent-free two-component polyurethane adhesive and its preparation method. This technology obtains better low-temperature coating performance by reducing the viscosity of the system; but its viscosity of 2000-5000mPa. The final transparency of the composite product is unfavorable, and is limited by its system characteristics. On the BOPP / CPP composite structure, the performance of the composite fastness (peel strength) is not optimistic

Method used

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Examples

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Embodiment Construction

[0040] The used raw materials of embodiment and comparative example are as follows:

[0041] Polyol-1: DL2000D, polyoxypropylene diol, molecular weight 2000, produced by Shandong Bluestar Dongda Co., Ltd.;

[0042] Polyol-2: DL3000D, polyoxypropylene diol, molecular weight 3000, produced by Shandong Bluestar Dongda Co., Ltd.;

[0043] Polyol-3: DL4000D, polyoxypropylene diol, molecular weight 4000, Shandong Bluestar Dongda Co., Ltd.;

[0044] Polyol-4: DMN400, polyoxypropylene triol, molecular weight 400, produced by Zibo Dexin Federal Company;

[0045] Polyol-5: DMN1000, polyoxypropylene triol, molecular weight 1000, produced by Zibo Dexin Federal Company;

[0046] Polyol-6: DEP560D, polyoxypropylene triol, molecular weight 3000, produced by Zibo Dexin Federal Company;

[0047] Polyol-7: HMP-532B, polyether polyol initiated by bisphenol A, molecular weight 400, produced by Zhejiang Huangma Technology Co., Ltd.;

[0048] Polyol-8: BPA-8.5EO, polyether polyol starting from ...

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Abstract

The invention provides a two-component polyurethane adhesive. According to the invention, polypropylene oxide polyol and bisphenol A-initiated polyether polyol are adopted and matched with organic isocyanate, so that the adhesive has advantages of good leveling property, ink matching property, low friction coefficient, adhesive force and heat resistance, and particularly has excellent adhesion toBOPP / CPP composite structures.

Description

technical field [0001] The invention relates to a two-component polyurethane adhesive, especially a two-component polyurethane adhesive for flexible packaging compounding, especially a polyurethane adhesive with excellent adhesion to BOPP / CPP composite structures. Background technique [0002] Two-component polyurethane adhesives are an important category of polyurethane adhesives. They are generally composed of two components: isocyanate compounds and hydroxyl compounds. The final bonding effect is achieved through the mixing reaction of the two. This type of adhesive has a wide range of adjustable performance, so it is widely used in many fields. [0003] An important field of application for two-component polyurethane adhesives is flexible packaging. Traditional two-component polyurethane adhesives for flexible packaging are solvent-based products, commonly known as dry compound adhesives. Due to the extensive use of organic solvents such as ethyl acetate, the production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/79C08G18/48B32B7/12
CPCC09J175/08C08G18/794C08G18/4812C08G18/4825C08G18/4829B32B7/12C08G2115/02
Inventor 吕忠元叶桂香赵怡喻建明邢乾斌
Owner WANHUA CHEM BEIJING
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