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Aqueous polyurethane flocking glue and preparation method thereof

A water-based polyurethane and flocking adhesive technology, which is applied in the field of polyurethane flocking adhesive and its preparation, can solve the problems of non-cold resistance, solvent resistance, unsafe use of adhesives, poor air and moisture permeability, etc., and achieve high hydrophilic efficiency, Reduced washing resistance and improved adhesion

Inactive Publication Date: 2017-05-31
SHANGHAI HUAFENG MATERIAL TECH RES INST LLP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing problems include poor bonding fastness, poor water resistance, poor hand feeling, poor air and moisture permeability, etc., and some adhesives have disadvantages such as unsafe use and high baking temperature.
It can only be used for artificial leather electrostatically planted leather fiber products, not suitable for all kinds of fiber fluff, and does not have cold resistance and solvent resistance

Method used

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  • Aqueous polyurethane flocking glue and preparation method thereof
  • Aqueous polyurethane flocking glue and preparation method thereof
  • Aqueous polyurethane flocking glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Under the protection of dry nitrogen, 230g of PBA after vacuum dehydration, 25g of isophorone diisocyanate, 50g of 1,6-hexamethylene diisocyanate, 100g of HF8356, 55g of BY3301, 0.02g of Add it into the reaction vessel, and react at 90°C for 1.5 hours under mechanical stirring to obtain a prepolymerization reaction system;

[0052] (2) Reduce the temperature of the above-mentioned prepolymerization reaction system to below 60°C, add acetone, the viscosity when the temperature is lowered to 25°C is 5000cP, then add 2.5g of 1,4-butanediol and 0.03g of Under mechanical stirring, control the temperature at 60°C for 2 hours to obtain a chain extension reaction system;

[0053] (3) Reduce the temperature of the above-mentioned chain extension reaction system to below 50°C, add 3.5g of hydrophilic chain extender A95 to react for 2 minutes, add 500g of water to emulsify and disperse, and obtain a milky white and bluish polyurethane emulsion, and distill under reduced pres...

Embodiment 2

[0055] (1) Under the protection of dry nitrogen, vacuum dehydrated 100g of PBA, 100g of PBNA, 25g of isophorone diisocyanate, 60g of 1,6-hexamethylene diisocyanate, 150g of HF8356, 50g of BY3301, 0.05 g's Add it into the reaction vessel, and react at 90°C for 1.5 hours under mechanical stirring to obtain a prepolymerization reaction system;

[0056] (2) Reduce the temperature of the above-mentioned prepolymerization reaction system to below 60°C, add acetone and cool down to 25°C when the viscosity is 4000cP, then add 6.0g of 1,4-butanediol and 0.05g of Under mechanical stirring, control the temperature at 65°C for 2 hours to obtain a chain extension reaction system;

[0057] (3) Reduce the temperature of the above-mentioned chain extension reaction system to below 50°C, add 2.5g of hydrophilic chain extender A95 to react for 4 minutes, add 520g of water to emulsify and disperse, and obtain a milky white and bluish polyurethane emulsion, and remove the solvent by distillati...

Embodiment 3

[0059] (1) Under the protection of dry nitrogen, 200g of PNA after vacuum dehydration, 30g of isophorone diisocyanate, 100g of 1,6-hexamethylene diisocyanate, 100g of HF8356, 50g of BY3301, 0.05g of Add it into the reaction vessel, and react at 95°C for 1.5 hours under mechanical stirring to obtain a prepolymerization reaction system;

[0060] (2) Reduce the temperature of the above-mentioned prepolymerization reaction system to below 60°C, add acetone and cool down to 25°C when the viscosity is 2500cP, then add 7.0g of 1,6-hexanediol and 0.1g of Under mechanical stirring, control the temperature and react at 70°C for 2 hours to obtain a chain extension reaction system;

[0061] (3) Reduce the temperature of the above-mentioned chain extension reaction system to below 50°C, add 3.0g of hydrophilic chain extender A95 to react for 4min, add 480g of water to emulsify and disperse to obtain a milky white and bluish polyurethane emulsion, and distill under reduced pressure to rem...

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Abstract

The invention discloses aqueous polyurethane flocking glue and a preparation method thereof. The aqueous polyurethane flocking glue is prepared from 15 to 30 parts by weight of diisocyanates, 40 to 60 parts by weight of polymer polyol, 20 to 40 parts by weight of diethylene glycol phthalic anhydride polymer, 10 to 20 parts by weight of water-soluble polyester polyol, 0.01 to 0.15 parts by weight of a catalyst, 0.5 to 1.5 parts by weight of a non-hydrophilic chain extender, 0.5 to 1.5 parts by weight of a hydrophilic chain extender and 70 to 100 parts by weight of water, wherein the diisocyanates comprise at least two of toluene diisocyanate, 1, 6-hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethane-4, 4-diisocyanate, dicyclohexylmethane diisocyanate and tetramethylbenzenedimethylene diisocyanate, and the polymer polyol comprises at least one of adipic acid-type polyester polyol having number-average molecular weight of 1000 to 3000, polycaprolactone, polycarbonate and polyether polyol. The aqueous polyurethane flocking glue has good resistance to water washing, adhesion fastness, solvent resistance, safety, environmental friendliness, good product flexibility and feeling.

Description

technical field [0001] The invention relates to polyurethane flocking glue and a preparation method thereof. Background technique [0002] Flocking is a technique commonly used in the textile industry to decorate substrates. Flocking products have their remarkable characteristics: strong three-dimensional sense, bright colors, soft hand feeling, gorgeous and warm, and the patterns formed by flocking technology are lifelike. Flocking products also have the characteristics of heat preservation, moisture resistance and friction resistance. As the most important auxiliary agent for electrostatic flocking is adhesive. Initially, electrostatic flocking adhesive products on the market are basically solvent-based polyurethane, polybutadiene emulsion, acrylic resin and other types. In recent years, with the increasing awareness of environmental protection Increasingly, more and more environmental protection requirements have been put forward for adhesives, and environmentally friend...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/08C09J175/04C08G18/75C08G18/73C08G18/66C08G18/42C08G18/32C08G18/48C08G18/12
CPCC09J175/06C08G18/12C08G18/6618C08G18/6651C08G18/6685C08G18/722C08G18/73C08G18/755C09J175/04C09J175/08C08G18/3206C08G18/3855
Inventor 王焕宋海峰蒋红梅唐劲松
Owner SHANGHAI HUAFENG MATERIAL TECH RES INST LLP
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