Environment-friendly modified polyurethane adhesive and preparation method thereof

A polyurethane adhesive and modification technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve environmental pollution and other problems, and achieve the effects of strong operability, mild conditions, and improved application range

Inactive Publication Date: 2019-05-03
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional polyurethane adhesives contain "triphenyl" organic solvents (benzene, toluene, xylene) that are toxic and harmful to the human body, and will release a large amount of irritating gas when used, causing pollution to the environment

Method used

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  • Environment-friendly modified polyurethane adhesive and preparation method thereof
  • Environment-friendly modified polyurethane adhesive and preparation method thereof
  • Environment-friendly modified polyurethane adhesive and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of above-mentioned environment-friendly modified polyurethane adhesive comprises the following steps:

[0032] 1) Control the reaction temperature to be 80°C, add polyester polyol and solvent in turn to the reaction kettle, mix and stir evenly;

[0033] 2) Control the reaction temperature at 82-85°C, add isocyanate and catalyst to the reaction kettle in sequence, mix and stir evenly, and react for 3-5 hours;

[0034] 3) Control the reaction temperature at 82-85°C, add chain extender, mix and stir evenly and continue to react for 1-3 hours;

[0035] 4) Control the reaction temperature at 80-82°C, add a terminator into the reactor, mix and stir evenly and continue the reaction for 1-2 hours;

[0036] 5) Add cellosolve into the reaction kettle, mix and stir evenly and continue to react for 1-2 hours;

[0037] 6) Control the reaction temperature below 50°C, add a viscosity regulator into the reaction kettle, mix and stir evenly, and then discharge. ...

Embodiment 1

[0042] An environmentally friendly modified polyurethane adhesive, including polyester polyol, isocyanate, solvent, viscosity modifier, catalyst, chain extender, terminator and cellosolve, wherein the polyester polyol includes a polyester polyol with a molecular weight of 3000 ; The isocyanate adopts MDI; The solvent includes butanone, ethyl acetate and dimethyl carbonate; The viscosity modifier adopts acetone;

[0043] The catalyst is organic tin catalyst T-12; the chain extender includes ethylene glycol and 1,4-butanediol; the terminator is methanol. The content of each component is shown in Table 1.

[0044] The preparation method of environment-friendly modified polyurethane adhesive comprises the steps:

[0045] 1) Preheat the reaction kettle, control the reaction temperature to 80°C, add polyester polyol and solvent to the reaction kettle in turn, control the stirring speed to 80-100r / min, and mix and stir evenly;

[0046] 2) Heat up the reaction kettle, control the re...

Embodiment 2

[0052] The difference between embodiment two and embodiment one is that the isocyanate includes HDI and HMDI, and the contents of each component are shown in Table 1.

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Abstract

The invention discloses an environment-friendly modified polyurethane adhesive and belongs to the technical field of adhesives, and the environment-friendly modified polyurethane adhesive comprises the following components in parts by weight: 15-25 parts of polyester polyol, 2-4 parts of isocyanate, 30-80 parts of a solvent, 30-40 parts of a viscosity modifier, 0.01-0.03 part of a catalyst, 0.1-0.5 part of a chain extender, 0.2-0.5 part of a terminator and 0.2-0.5 part of a cellosolve. The invention also discloses a preparation method thereof. Different types of isocyanate are used, so that the application range of the environment-friendly modified polyurethane adhesive is improved; a controllable reaction process is provideed, poisonous and harmful three-benzene solvents (benzene, methylbenzene and xylene) are not used, the pollution is reduced, the controllability of production is improved, and meanwhile, the comprehensive cost of the product is reduced. The preparation method of theenvironment-friendly modified polyurethane adhesive is clear in route, mild in conditions, safe to operate, control and high in operability.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to an environmentally friendly modified polyurethane adhesive and a preparation method thereof. Background technique [0002] Polyurethane adhesives are adhesives containing urethane groups (-NHCOO-) and isocyanate groups (-NCO-) in the molecular chain. Polyurethane adhesives have a wide choice of raw materials, many formulas, many varieties, and a wide range of performance changes. Polyurethane molecules contain soft segments and hard segments with adjustable proportions. Adjusting the polyurethane resin formula can obtain adhesives with different degrees of softness and hardness, so as to meet the bonding of different materials and have a wide range of applications. [0003] There are various polar groups such as ester groups and carbamate groups and non-polar groups such as polymethylene groups in polyester polyurethane adhesives, which have strong adhesion to the surface of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/66C08G18/42C08G18/32
Inventor 刁春莉吕华波柳红毅江平
Owner XUCHUAN CHEM SUZHOU
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