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Water-based polyurethane composite emulsion and preparation method thereof

A water-based polyurethane, composite emulsion technology, applied in the direction of graft polymer adhesives, adhesive types, adhesives, etc., can solve the problems of power consumption, high cost, unfavorable fire safety, etc., to speed up volatilization and improve water resistance. sexual effect

Active Publication Date: 2012-12-26
广东多正树脂科技有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Most of the domestic adhesives are still solvent-based products, while water-dispersed polyurethane adhesives will be developed with high added value as people's living standards improve and the consumer demand for the comprehensive performance of polyurethane materials in various industries, especially as the public's awareness of environmental protection increases. The zero-VOC green polyurethane adhesive products have important practical significance; most of the imported water-based polyurethanes are relatively expensive, which limits their large-scale use. Thermal curing, the heating process of the oven consumes electric energy and is not conducive to fire safety. The formula and structure are redesigned to achieve room temperature curing and cross-linking, which is more conducive to energy saving, environmental protection and safety assurance for shoe factories and employees.

Method used

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preparation example Construction

[0016] A kind of preparation method of aqueous polyurethane composite emulsion, the synthesis of PU emulsion containing double bond: 100 weight parts of polyester polyol or polyether polyol, 20-45 weight part of diisocyanate, 2-6 weight part of dimethylol Propionic acid, 1-5 parts by weight of trimethylolpropane monoallyl ether, 0.5-5 parts by weight of hydroxypropyl acrylate, 0.5-5 parts by weight of hydroxyethyl acrylate, 1-5 parts by weight of 1,4-butanedi Put the alcohol into a four-necked round bottom flask with a reflux condenser, a thermometer, and a digital display mixer in turn, add the catalyst dropwise, keep the constant temperature at 80-85°C, and stir at a speed of 80-150rpm, and react for 4-6 hours; depending on the reaction, add a small amount of acetone or Acrylate monomers to reduce viscosity, lower the temperature to 45°C, add triethylamine to neutralize, add water for about 15 minutes to disperse and emulsify, then add ethylenediamine to extend the chain in a...

Embodiment 1

[0020] Water-based PUA composite emulsion adhesive for shoes:

[0021] Water-based PUA composite emulsion adhesive can replace the current solvent-based PU adhesive and imported water-based PU emulsion adhesive to obtain a film-forming block with strong initial adhesion, water resistance, aging resistance, and good non-yellowing effect.

[0022] prescription:

[0023] The following are calculated in parts by weight, and the molecular weight of the polyester polyol is 1000-2000.

[0024] PU emulsion

[0025] Polyester polyol: 100 parts,

[0026] Diisocyanate: 27 parts,

[0027] Dimethylol propionic acid: 4.5 parts,

[0028] 1,4-butanediol: 1 part,

[0029] TMPME: 2 parts,

[0030] Hydroxypropyl Acrylate: 2 parts,

[0031] Ethylenediamine: 0.5 parts,

[0032] Triethylamine: 3 parts,

[0033] Deionized water: 150-200 parts;

[0034] PU / PA emulsion

[0035] PU emulsion: 100 parts (40%),

[0036] Butyl acrylate: 15 parts,

[0037] Isooctyl acrylate: 15 parts,

[0038]...

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Abstract

The invention discloses a water-based polyurethane composite emulsion and a preparation method thereof. The preparation method is characterized by comprising the following steps: by using acetone or butanone and acrylic monomer as solvents, polymerizing diisocyanate (HDI), isophorone diisocyanate (IPDI), mixed polyester polyalcohol, dihydroxymethylpropionic acid, 1,4-butanediol, trimethylolpropane monoene propyl ether, 2-hydroxypropyl acrylate and 2-hydroxyethyl acrylate to obtain carboxylic polyurethane; neutralizing with tertiary amine, and removing the solvents to obtain a self-emulsified double-bond-containing water-based polyurethane anionic emulsion; and by using the emulsion as a seed, adding acrylate monomer and a right amount interpenetrating-network crosslinking agent monomer to carry out pre-emulsification, and carrying out seed emulsion polymerization to obtain the composite emulsion in an interpenetrating network structure. The invention has the advantages of energy saving, environmental protection, high early bonding force, safe and reliable technique and stable product quality.

Description

technical field [0001] The invention relates to the technical field of shoe adhesives, in particular to the preparation and application of a high-solid-content aqueous polyurethane composite emulsion for shoes. Background technique [0002] Water-based polyurethane (WPU) emulsion uses water as the dispersion medium. It has good comprehensive performance, no pollution, non-combustibility, complete transportation, and environmental friendliness. It is an environmentally friendly material and is widely used in the field of coatings and adhesives. In recent years, the research on WPU emulsion has been very active, focusing on leather shoe treatment agents, coatings, and adhesives. However, compared with foreign water-based polyurethanes, the initial adhesion, solid content, and room temperature curing speed are relatively low, and the quality of domestic products still cannot match compared to. Compared with traditional solvent-based products, polyacrylate (PA) emulsion and WPU...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/00C08G18/67C08G18/42C09J151/08
Inventor 许玉良曾广福丁洪成曹国豪郑李华李树泉吴光刘传刚
Owner 广东多正树脂科技有限公司
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