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

A polyacrylate emulsion, polyurethane modification technology, applied in the direction of dyeing, textile and paper making, etc., can solve the problems of poor structural compatibility of polyacrylate, 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: 2020-12-18
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 thereof

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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 includes the following steps:

[0018](1) In the presence of a polyurethane catalyst, the PU active pre-polymerization monomers (ie polyester diol, polybutadiene diol, isophorone diisocyanate, dimethylol propionic acid, trimethylol Propane monoallyl ether, 1,4-butanediol, polyethylene glycol methyl ether and hydroxyethyl methacrylate) are reacted to obtain PU active prepolymer;

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

[0020](3) Mix the remaining part of the polyacrylate monomer raw material, the remaining part of the emulsifier and water, stir and emulsify to prepare the PA pre-emulsion; in the presence of the initiator, the PA pre-emulsion is pre-polymerized and then added The PUm active prepolymer...

Embodiment 1

[0049](1) Preparation of PU active prepolymer

[0050]56.465g polyester diol (PE2348, molecular weight 2300), 0.987g polybutadiene diol (HTPB, molecular weight 2700), vacuum dehydration at 110 ℃ for 90 minutes, then cooling to 75 ℃ or less, adding 37.011g iso Phosphonone diisocyanate (IPDI); after the temperature stabilizes, add 5.365 g of dimethylolpropionic acid (DMPA), increase the temperature to 90℃ and keep the temperature for 60 minutes, add 0.0245g of dibutyltin dilauric acid (DBTDL), keep the temperature for 60 minutes; Cool down to below 60℃, add 13.068g trimethylolpropane monoallyl ether (TMPME), 0.36g 1,4-butanediol (BDO) and 5g polyethylene glycol methyl ether (N120, molecular weight is 1000) and react for 30min; add 0.0245g of dibutyltin dilauric acid (DBTDL), increase the temperature to 75℃ and keep for 120min, add 40g of ethylpyrrolidone (NEP) to reduce the viscosity; then add 4.555g of methacrylic acid hydroxy Ethyl ester (HEMA), react at 75°C for 90 minutes to obtain P...

Embodiment 2

[0057](1) Preparation of PU active prepolymer

[0058]52.75g polyester diol (PE2348, molecular weight 2300), 0.95g polybutadiene diol (HTPB, molecular weight 2700), vacuum dehydration at 100 ℃ for 90 minutes, then cooling to 75 ℃ or less, add 37.011g iso Phosphonone diisocyanate (IPDI); after the temperature stabilizes, add 5.3g dimethylolpropionic acid (DMPA), increase the temperature to 85°C and keep for 30min, add 0.024g dibutyltin dilauric acid (DBTDL), keep for 30min; Cool down to below 60℃, add 12.57g trimethylolpropane monoallyl ether (TMPME), 0.36g 1,4-butanediol (BDO) and 5.55g polyethylene glycol methyl ether (N120, molecular weight) dropwise 1000) and react for 20 minutes; add 0.036g of dibutyltin dilauric acid (DBTDL), increase the temperature to 70℃ and keep for 90 minutes, add 40g of ethylpyrrolidone (NEP) to reduce the viscosity; then add 5.85g of methacrylic acid hydroxy Ethyl ester (HEMA), react at 70°C for 60 minutes to obtain PU active prepolymer;

[0059](2) Preparatio...

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Abstract

The invention relates to the field of printing adhesives, in particular to an anionic polyurethane-modified polyacrylate emulsion with a crosslinked core-shell structure and a preparation method thereof. The method comprises: polyester diol, polymalene diol, isophorone diisocyanate, dimethylol propionic acid, trimethylolpropane monoallyl ether, 1,4-butanediol , polyethylene glycol methyl ether, hydroxyethyl methacrylate react with polyurethane catalyst to obtain PU active prepolymer; PU active prepolymer, part of polyacrylate monomer, part of emulsifier, triethylamine and water Mix to prepare the PUm active prepolymer emulsion; mix the remaining polyacrylate monomer, the remaining emulsifier and water, stir and emulsify, add part of the initiator for prepolymerization, and then add the PUm active prepolymer emulsion and the remaining initiator agent for polymerization. The adhesive film formed by the polyurethane-modified polyacrylate emulsion prepared by the invention has better water resistance, acid resistance and low-temperature flexibility.

Description

Technical field[0001]The invention relates to the field of paint 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]Fabric pigment printing is due to its unique advantages (for example, pigment printing has complete chromatogram, simple process, fine printed lines, clear printing layers, bright and colorful color, good light stability, short production cycle, high production efficiency, clear outline, three-dimensional The existence of strong sense, etc., has been increasingly favored by the printing and dyeing industry in recent years and has been widely used. Because the paint is an insoluble colored solid particle and has no directness and affinity to the fiber, the paint printing needs to use a binder to form a firm film on the fabric surface to adhere the paint particles to the fabric, and then bake the paint to fix it on the The surface of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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