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Oleic acid reaction-resistant polyurethane hot melt adhesive

A polyurethane hot melt adhesive, acid reaction technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as incomplete products, achieve simple structure, improve oleic acid resistance, improve machine The effect of type and crosslink density

Active Publication Date: 2021-05-14
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to different needs, properly adjust the content of hard segment and soft segment link to meet different customer requirements, but there is no perfect product on the market for the requirement of oleic acid resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare oleic acid-resistant reactive polyurethane hot melt adhesive, the steps are as follows:

[0032] (1) 25 parts of polycarbonate cyclohexyl dimethanol-1,6 hexanediol ester diol of 400 molecular weight, 30 parts of polyadipate-ethylene glycol ester diol of 3000 molecular weight, PPG- Add 10 parts of 400 polypropylene glycol, 1 part of chain extender 1, 4 cyclohexyl glycol, and 0.6 part of 1010 antioxidant into the reaction vessel, heat and stir evenly, remove water under vacuum at 120°C for 120 minutes; then cool down under nitrogen protection to 80°C;

[0033] (2) Add 35.55 parts of p-phenylene diisocyanate into the reaction vessel under the protection of nitrogen, and react at 100°C for 15 minutes under the protection of nitrogen;

[0034] (3) Add 0.04 parts of catalyst bismuth neodecanoate to the reaction vessel, and continue to react at 100°C for 45 minutes under the protection of nitrogen; add 1 part of coupling agent γ-mercaptopropyltrimethoxysilane, organic...

Embodiment 2

[0036] Prepare oleic acid-resistant reactive polyurethane hot melt adhesive, the steps are as follows:

[0037] (1) 35 parts of polycarbonate cyclohexyl dimethanol-1,6 hexanediol ester diol with 1000 molecular weight, 50 parts of polyadipate-ethylene glycol ester diol with 3000 molecular weight, PPG- with 400 molecular weight Add 20 parts of 400 polypropylene glycol, 2 parts of chain extender 1,4 cyclohexyl glycol, and 0.2 part of 1010 antioxidant into the reaction vessel, heat and stir evenly, remove water under vacuum at 120°C for 120 minutes; then lower the temperature under nitrogen protection to 80°C;

[0038] (2) Add 34.8 parts of p-phenylene diisocyanate into the reaction vessel under the protection of nitrogen, and react at 100°C for 15 minutes under the protection of nitrogen;

[0039] (3) Add 0.02 parts of catalyst bismuth neodecanoate to the reaction vessel, and continue to react at 100°C for 45 minutes under the protection of nitrogen; add 0.2 parts of coupling ag...

Embodiment 3

[0041] Prepare oleic acid-resistant reactive polyurethane hot melt adhesive, the steps are as follows:

[0042](1) Polycarbonate cyclohexyl dimethanol-1,6 hexanediol ester diol 30 parts, 3000 molecular weight polyadipate-ethylene glycol ester diol 40 parts, 400 molecular weight PPG- Add 15 parts of 400 polypropylene glycol, 1.5 parts of chain extender 1,4 cyclohexyl glycol, and 0.4 part of 1010 antioxidant into the reaction vessel, heat and stir evenly, remove water under vacuum at 120°C for 120 minutes; then cool down under nitrogen protection to 80°C;

[0043] (2) Add 31.6 parts of p-phenylene diisocyanate into the reaction vessel under the protection of nitrogen, and react at 100°C for 15 minutes under the protection of nitrogen;

[0044] (3) Add 0.03 parts of catalyst bismuth neodecanoate to the reaction vessel, and continue to react at 100°C for 45 minutes under the protection of nitrogen; add 0.6 parts of coupling agent γ-mercaptopropyltrimethoxysilane, organic amine ca...

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PUM

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Abstract

The invention discloses an oleic acid reaction-resistant polyurethane hot melt adhesive. The hot melt adhesive is a single-component adhesive with a solid content of 100%, and the formula of the hot melt adhesive comprises polyol, p-phenylene diisocyanate, a chain extender, an antioxidant, a coupling agent and a catalyst. The polyol comprises polycarbonate diol, polyester diol and polyether diol. The polyol in the oleic acid reaction-resistant polyurethane hot melt adhesive adopts the polycarbonate diol, the polyester diol and the polyether diol which have a special short-chain structure, the special polyol structure improves the polarity and crosslinking density of a system, the adhesion between the hot melt adhesive and a base material is improved, and the hot melt adhesive can cope with the erosion of oleic acid; due to the structure of the chain extender the strength of the system is enhanced, and the crosslinking density of the system and the adhesion to the base material are improved; and the p-phenylene diisocyanate is simple in structure, strong in polarity and high in reaction activity, so that the dosage form and the crosslinking density of the system are further improved.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to an oleic acid-resistant reactive polyurethane hot-melt adhesive. Background technique [0002] Reactive polyurethane hot melt adhesive is a one-component, 100% solid-containing environmentally friendly adhesive, which has both hot-melt and reactive adhesives. [0003] Because it has the characteristics of easy sizing, rapid curing, and high initial viscosity of hot-melt adhesives, and has the advantages of high bonding strength, heat resistance and chemical resistance of reactive adhesives. Compared with traditional hot-melt adhesives, the use temperature is lower. Wood, ceramics, fabric, stone, metal, plastic, glass, rubber, leather and other substrates all exhibit excellent bonding properties, so PUR reactive polyurethane hot melt adhesives are widely used in various industries, such as the automotive industry, textile and garment industry , construction industry, electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/06C08G18/76C08G18/66C08G18/48C08G18/44C08G18/42C08G18/32
CPCC09J175/04C09J11/06C08G18/7614C08G18/6607C08G18/4825C08G18/44C08G18/4238C08G18/4018C08K5/548C08K5/544
Inventor 庄恒冬王建斌陈田安
Owner YANTAI DARBOND TECH
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