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Anionic polyurethane modified polyacrylate emulsion with crosslinked core-shell structure and preparation method of anionic polyurethane modified polyacrylate emulsion

A polyacrylate emulsion and polyurethane modification technology, which is applied in dyeing, textiles and papermaking, can solve the problems of poor polyacrylate structure compatibility, lack of structural hierarchy, poor acid resistance, etc., and achieve emulsion stability Excellent, moderate film forming speed, good water resistance and acid resistance

Active Publication Date: 2019-01-08
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the products prepared by the prior art, the compatibility of polyurethane and polyacrylate structure is poor and lacks the hierarchical structure, which leads to the poor water resistance and acid resistance of the adhesive film, and the conjunctiva is too fast.

Method used

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  • Anionic polyurethane modified polyacrylate emulsion with crosslinked core-shell structure and preparation method of anionic polyurethane modified polyacrylate emulsion

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preparation example Construction

[0017] The preparation method of the anionic polyurethane modified polyacrylate emulsion with crosslinked core-shell structure of the present invention comprises the following steps:

[0018] (1) In the presence of a polyurethane catalyst, the PU active pre-polymerized monomer (i.e. polyester diol, polybutadiene diol, isophorone diisocyanate, dimethylol propionic acid, trimethylol propane monoallyl ether, 1,4-butanediol, polyethylene glycol methyl ether and hydroxyethyl methacrylate) to react to obtain PU active prepolymer;

[0019] (2) mixing the PU active prepolymer, part of the polyacrylate monomer raw material, part of the emulsifier, triethylamine and water to prepare the PUm active prepolymer emulsion;

[0020] (3) Mix the remaining part of the polyacrylate monomer raw material, the remaining part of the emulsifier and water, and stir and emulsify to obtain a PA pre-emulsion; in the presence of an initiator, carry out a pre-polymerization reaction on the PA pre-emulsion,...

Embodiment 1

[0049] (1) Preparation of PU active prepolymer

[0050] 56.465g of polyester diol (PE2348, molecular weight 2300) and 0.987g of polymalene diol (HTPB, molecular weight 2700) were vacuum dehydrated at 110°C for 90 minutes, then cooled to below 75°C, and 37.011g of isobutadiene was added Phorne diisocyanate (IPDI); after the temperature is stable, add 5.365 g of dimethylolpropionic acid (DMPA), raise the temperature to 90°C and keep it warm for 60 minutes, add 0.0245 g of dibutyltin dilauric acid (DBTDL), and keep it warm for 60 minutes; Cool down to below 60°C, add dropwise 13.068g of trimethylolpropane monoallyl ether (TMPME), 0.36g of 1,4-butanediol (BDO) and 5g of polyethylene glycol methyl ether (N120, molecular weight 1000) and heat-retain the reaction for 30min; add 0.0245g dibutyltin dilaurate (DBTDL), heat up to 75°C and heat-retain for 120min, add 40g ethylpyrrolidone (NEP) to reduce the viscosity; then add 4.555g methacrylic acid hydroxyl Ethyl ester (HEMA), react at...

Embodiment 2

[0057] (1) Preparation of PU active prepolymer

[0058] 52.75g polyester diol (PE2348, molecular weight 2300), 0.95g polymasbutadiene glycol (HTPB, molecular weight 2700), vacuum dehydration at 100°C for 90min, then lower the temperature to below 75°C, add 37.011g isobutadiene Phorne diisocyanate (IPDI); after the temperature is stable, add 5.3g dimethylolpropionic acid (DMPA), heat up to 85°C and keep it warm for 30min, add 0.024g of dibutyltin dilauric acid (DBTDL), keep warm for 30min; Cool down to below 60°C, add dropwise 12.57 g of trimethylolpropane monoallyl ether (TMPME), 0.36 g of 1,4-butanediol (BDO) and 5.55 g of polyethylene glycol methyl ether (N120, molecular weight 1000) of the mixed solution and keep it warm for 20 minutes; add 0.036g of dibutyltin dilaurate (DBTDL), heat up to 70°C and keep it warm for 90 minutes, add 40g of ethylpyrrolidone (NEP) to reduce the viscosity; then add 5.85g of methacrylic acid hydroxyl Ethyl ester (HEMA), reacted at 70°C for 60 m...

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Abstract

The invention relates to the field of printing adhesives, in particular to anionic polyurethane modified polyacrylate emulsion with a crosslinked core-shell structure and a preparation method of the anionic polyurethane modified polyacrylate emulsion. The method comprises the following steps: polyester diol, hydroxyl terminated polybutadiene, isophorone diisocyanate, dimethylolpropionic acid, trimethylolpropane monoallyl ether, 1,4-butanediol, polyethylene glycol methyl ether and 2-hydroxyethyl methacrylate are subjected to a reaction with a polyurethane catalyst, and a PU active prepolymer isobtained; the PU active prepolymer, part of a polyacrylate monomer, part of an emulsifier, triethylamine and water are mixed, and PUm active prepolymer emulsion is prepared; the remaining polyacrylate monomer, the remaining emulsifier and water are mixed, stirred and emulsified, part of an initiator is added for pre-polymerization, and then the PUm active prepolymer emulsion and the remaining initiator are added for polymerization. An adhesive film formed by the polyurethane modified polyacrylate emulsion has better water resistance, acid resistance and low temperature flexibility.

Description

technical field [0001] The invention relates to the field of pigment printing adhesives, in particular to an anionic polyurethane-modified polyacrylate emulsion with a crosslinked core-shell structure and a preparation method thereof. Background technique [0002] Due to its unique advantages (for example, complete color spectrum of pigment printing, simple process, fine printing lines, distinct printing layers, bright and gorgeous color, good light stability, short production cycle, high production efficiency, clear outline, three-dimensional Strong sense, etc.) has been favored by the printing and dyeing industry in recent years and has been widely used. Since the paint is an insoluble colored solid particle and has no directness and affinity to the fiber, pigment printing needs to use an adhesive to form a firm film on the surface of the fabric to adhere the paint particles to the fabric, and then bake the paint to fix it. The surface of the fabric, thereby giving the fa...

Claims

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Application Information

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IPC IPC(8): D06P1/52C08F283/00C08F220/18C08F212/08C08F220/14C08F220/06C08F220/58
CPCD06P1/525D06P1/5285C08F283/008C08F220/1808C08F220/58C08F220/1804
Inventor 权衡刘迪雅倪丽杰周文师毕曙光李时伟杨明星
Owner WUHAN TEXTILE UNIV
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