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A kind of polyurethane adhesive composition for shoes and preparation method thereof

A technology of polyurethane adhesive and composition, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of flammability, poor adhesion, unsuitable for shoemaking, etc.

Active Publication Date: 2020-06-19
上海都昱新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is the largest shoe-making country in the world. At present, the annual output of adhesive shoes has exceeded 2 billion pairs. The vast majority (95%) of the manufacturing industry use neoprene adhesives, which have good initial viscosity, can be cold-bonded, The price is low, but its resistance to plasticizer penetration is poor, and it has poor adhesion to new shoe materials such as PU leather, thermoplastic rubber, and soft PVC. What is even more fatal is that it uses benzene compounds as solvents, which are not only poisonous, but also easily Burning, no longer meet the requirements of the development of the shoe industry
At present, the grafted neoprene adhesive that does not contain benzene solvents in the third generation of shoe adhesives adopts a low-toxic formula, but a large amount of organic solvents in it will still cause harm to the human body and the ecological environment.

Method used

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  • A kind of polyurethane adhesive composition for shoes and preparation method thereof

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preparation example Construction

[0030] The preparation method of described organic clay modified epoxy resin is as follows:

[0031] (1) Add organoclay and N,N-dimethylacetamide into the reactor, heat up to 70°C, stir for 3 hours, add epoxy resin, keep warm at 70°C for 10 hours, add 70°C deionized water, Extract part of N,N-dimethylacetamide; the weight ratio of the organic clay to the N,N-dimethylacetamide is 1:3; the weight ratio of the organic clay to the epoxy resin is 0.16:1;

[0032](2) Debubble the extracted mixture in vacuum at 80°C for 6 hours, add glutaric anhydride and octadecyltrimethylammonium chloride, continue to remove bubbles in vacuum at 80°C for 2 hours, and then solidify at 80°C for 2 hours under normal pressure. Curing at 100°C for 1h and curing at 120°C for 5h to obtain the organoclay-modified epoxy resin; the weight ratio of the organoclay to the glutaric anhydride and the octadecyltrimethylammonium chloride is 1: 0.32:0.2.

[0033] The preparation method of described organic clay i...

Embodiment 1

[0064] The raw materials for preparing the polyurethane adhesive composition for shoes include: 24 parts of polyols, 26 parts of isocyanate compounds, 22 parts of chain extenders, 7 parts of modified epoxy resins, 6 parts of modified octa(aminophenyltrioxysilane), 5 parts of crosslinking agent, 60 parts of deionized water;

[0065] Wherein, the polyhydric alcohol is tripentaerythritol and rosin pentaerythritol ester, and the molar ratio of the tripentaerythritol to the rosin pentaerythritol ester is 1:2.3; the isocyanate compound is isophorone diisocyanate; the chain extender is 2,4-sodium diaminobenzenesulfonate and dimethylol propionic acid; the modified epoxy resin is an organoclay modified epoxy resin, and the organoclay is 2 grafted sodium dodecylsulfonate , a composite composition of 4,6-trihydroxybenzoic acid and attapulgite acrylic acid, the 2,4,6-trihydroxybenzoic acid grafted with sodium dodecylsulfonate in the organoclay and the acrylic acid The weight ratio of att...

Embodiment 2

[0081] The raw materials for preparing the polyurethane adhesive composition for shoes include: 24 parts of polyols, 26 parts of isocyanate compounds, 22 parts of chain extenders, 7 parts of modified epoxy resins, 6 parts of modified octa(aminophenyltrioxysilane), 5 parts of crosslinking agent, 60 parts of deionized water;

[0082] Wherein, the polyhydric alcohol is tripentaerythritol and rosin pentaerythritol ester, and the molar ratio of the tripentaerythritol to the rosin pentaerythritol ester is 1:1; the isocyanate compound is isophorone diisocyanate; the chain extender is 2,4-sodium diaminobenzenesulfonate and dimethylol propionic acid; the modified epoxy resin is an organoclay modified epoxy resin, and the organoclay is 2 grafted sodium dodecylsulfonate , a composite composition of 4,6-trihydroxybenzoic acid and attapulgite acrylic acid, the 2,4,6-trihydroxybenzoic acid grafted with sodium dodecylsulfonate in the organoclay and the acrylic acid The weight ratio of attap...

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Abstract

The invention provides a polyurethane adhesive composition for shoes. The polyurethane adhesive composition for shoes is prepared from raw materials including, by weight part, 10-50 parts of polyhydric alcohols, 20-60 parts of isocyanate compounds, 15-25 parts of chain extender, 5-16 parts of modified epoxy resin, 3-10 parts of modified octa (aminophenyltrioxysilane), 1-10 parts of cross-linking agent and 60 parts of deionized water, wherein the chain extender is composed of sodium 2, 4-diaminophenylsulfonate and dimethylolpropionic acid, the modified epoxy resin is organic clay-modified epoxy resin, and organic clay is a compounded composition of 2, 4, 6-trihydroxybenzoic acid grafted with sodium dodecyl sulfonate, and acrylic acid attapulgite; the modified octa (aminophenyltrioxysilane) is octa (aminophenyltrioxysilane) grafted with 3, 4', 5-trihydroxyl-diphenyl; the cross-linking agent is obtained by reacting triethanolamine with 2-hydracrylic acid.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular, the invention relates to a polyurethane adhesive composition for shoes and a preparation method thereof. Background technique [0002] my country is the largest shoe-making country in the world. At present, the annual output of adhesive shoes has exceeded 2 billion pairs. The vast majority (95%) of the manufacturing industry use neoprene adhesives, which have good initial viscosity, can be cold-bonded, The price is low, but its resistance to plasticizer penetration is poor, and it has poor adhesion to new shoe materials such as PU leather, thermoplastic rubber, and soft PVC. What is even more fatal is that it uses benzene compounds as solvents, which are not only poisonous, but also easily Burning, has not adapted to the requirements of the development of the shoe industry. At present, the graft neoprene adhesive of the third-generation shoe adhesive without benzene s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J11/04C08G18/75C08G18/65C08G18/64C08G18/58C08G18/12C08G18/34C08G18/32
CPCC08G18/12C08G18/58C08G18/64C08G18/6517C08G18/6529C08G18/6541C08G18/755C08K3/346C08K9/08C09J11/04C09J175/04C08G18/348C08G18/3855
Inventor 杨丽燕朱啊啦
Owner 上海都昱新材料科技有限公司