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Two-component solvent-free polyurethane adhesive and preparation method thereof

A solvent-free polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of limited application fields, unstable product performance, imperfect application technology, etc., to reduce production. cost, promoting cross-linking and curing, and improving the effect of bond strength

Inactive Publication Date: 2020-06-05
BEIJING HUATENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic demand for solvent-free composite adhesives is growing rapidly, but in view of the imperfect domestic application technology and unstable product performance, domestic solvent-free products still have some deficiencies in high temperature resistance and bonding strength, which limits their use. Application field

Method used

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  • Two-component solvent-free polyurethane adhesive and preparation method thereof
  • Two-component solvent-free polyurethane adhesive and preparation method thereof
  • Two-component solvent-free polyurethane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054]

[0055] (1) Preparation of component A: Polyoxypropylene polyether diol is mixed with ethylene terephthalate-based polyester polyol, and at 120° C., vacuum dehydration until the moisture is 420 ppm, adding MDI, and React at 80°C for 2 hours, then test the percentage of NCO every half hour, and stop the reaction when the NCO content decreases and tends to be stable, to obtain component A;

[0056] (2) Preparation of component B: mix polyoxypropylene polyether diol, triol with ethylene terephthalate-based polyester, vacuum dehydrate at 120°C until the water content is 410ppm, and cool down to At 50°C, add aminosilane coupling agent and dibutyltin dilaurate and stir evenly to prepare component B;

[0057] Wherein, the above-mentioned ethylene terephthalate-based polyester polyol is prepared by the following method:

[0058] Take 10 parts of recovered PET bottle flakes after washing and drying, add 0.05 parts of stannous chloride and 25 parts of ethylene glycol in sequ...

Embodiment 2

[0062]

[0063] (1) Preparation of component A: Polyoxypropylene polyether diol is mixed with diethylene glycol terephthalate-based polyester polyol, and at 120° C., vacuum dehydrated until the moisture is 439ppm, adding MDI, and React at 80°C for 2 hours, then test the percentage of NCO every half hour, and stop the reaction when the NCO content decreases and tends to be stable, to obtain component A;

[0064] (2) Preparation of component B: Polyoxypropylene polyether diol, triol and diethylene glycol terephthalate-based polyester are mixed, and at 120° C., vacuum dehydration until the water content is 420 ppm, and the temperature is lowered to At 50°C, add aminosilane coupling agent and dibutyltin dilaurate and stir evenly to prepare component B;

[0065] Wherein, above-mentioned diethylene glycol terephthalate base polyester polyol is prepared by following method:

[0066] Take 10 parts of recovered PET bottle flakes after washing and drying, add 0.1 parts of zinc aceta...

Embodiment 3

[0070]

[0071] (1) Preparation of Component A: Mix polyoxypropylene polyether diol with propylene terephthalate-based polyester polyol, vacuum dehydrate at 120°C until the water content is 456ppm, add TDI, and heat at 60°C Lower the reaction for 2 hours, then test the NCO percentage content every half an hour, and stop the reaction when the NCO content decreases and tends to be stable, and component A is obtained;

[0072] (2) Preparation of component B: mix polyoxypropylene polyether diol and triol with propylene terephthalate-based polyester, vacuum dehydrate at 120°C until the water content is 458ppm, and cool down to 60°C , adding epoxy silane coupling agent and dibutyltin dilaurate and stirring evenly to prepare component B;

[0073] Wherein, the above-mentioned propylene glycol terephthalate-based polyester polyol is prepared by the following method:

[0074] Take 10 parts of recovered PET bottle flakes after washing and drying, add 0.1 parts of zinc acetate and 30 ...

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Abstract

The invention discloses a bi-component solvent-free polyurethane adhesive and a preparation method thereof, and belongs to the technical field of adhesives. The paint is composed of a component A anda component B according to a mass ratio of 1-2:1. The component A is prepared from the following raw materials in parts by weight: 30 to 80 parts of polyisocyanate, 10 to 50 parts of polyether polyoland 5 to 15 parts of polyester polyol; the component B is prepared from the following raw materials in parts by weight: 5 to 40 parts of polyether polyol, 20 to 50 parts of polyester polyol, 2 to 6 parts of a coupling agent and 0.05 to 0.5 part of a catalyst. The preparation method comprises the following steps: preparing the component A; preparing the component B; and preparing the polyurethane adhesive. The polyester polyol adopted by the invention is prepared by alcoholysis and esterification of recycled PET, so that the production cost of the polyester polyol is reduced. The obtained two-component solvent-free polyurethane adhesive has the advantages of low viscosity, reduced production energy consumption, high bonding strength and high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of adhesives. More specifically, it relates to a two-component solvent-free polyurethane adhesive and its preparation method and application. Background technique [0002] Polyurethane (PU) adhesives are adhesives containing carbamate groups (-NHCOO-) and / or isocyanate groups (-NCO) in the molecular chain. The molecular segment contains soft segments such as ether bonds or ester bonds with glass transition temperatures lower than normal temperature, and carbamate groups (-NHCOO-) and isocyanate groups (-NCO) with glass transition temperatures higher than normal temperature. Hard segment of such structure. Among them, isocyanate and urethane have strong polarity and chemical activity, and they have good chemical adhesion to porous materials (foam, leather, etc.) and materials with smooth surfaces (glass, metal, etc.). As a medium-to-high-end adhesive, polyurethane adhesive has excellent flexibility, impact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J175/08C08G18/48C08G18/42C08G63/183C08G63/672
CPCC08G18/4018C08G18/4213C08G18/425C08G18/4808C08G18/4812C08G18/4825C08G18/4829C08G18/4854C08G63/183C08G63/672C09J175/04C09J175/06C09J175/08
Inventor 陈宇孙同兵王明航崔正许弟韩航张春辉冯发飞
Owner BEIJING HUATENG NEW MATERIAL CO LTD
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