Method for polymerizing core-shell type aqueous polyurethane-polyacrylate (PUA) emulsion by in-situ radiation

A water-based polyurethane and polyurethane emulsion technology, which is used in textiles, papermaking, fiber processing, etc., can solve problems such as affecting the water resistance of emulsions, not meeting environmental protection requirements, and poor stability, achieving easy control of reaction speed, energy saving, Soft-touch effect

Active Publication Date: 2010-06-30
HEFEI JUHE RADIAL CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The polyurethane-acrylic ester composite emulsion and its preparation method proposed in Chinese patent 200710147402.4 utilize IPN technology to synthesize the network interpenetrating emulsion. Although a product with high performance has been obtained, because there is no chemical bond between polyurethane and polyacrylate, the stability is not good. Well, the function of each component is limited
Chinese Patent Application No. 200810019023.1 proposes a method for radiation polymerization of water-based polyurethane-acrylate emulsion that combines the performance advantages of polyurethane and water-based polyurethane, adopts radiation polymerization at room temperature, and the reaction process is easy to control, but it still needs to introduce acetone and about The emulsifier Pingpinga 0, which accounts for 3% of the acrylate monomer, does not meet the requirements of environmental protection. Pingpinga 0 is an inorganic emulsifier that does not participate in the reaction, and eventually remains in the emulsion, affecting the water resistance of the emulsion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The specific method of in-situ radiation polymerization of core-shell type waterborne polyurethane-acrylate is as follows:

[0035] Numbering

raw material name

parts by weight

1

Polyoxypropylene glycol (PPG)

100

2

Toluene diisocyanate (TDI)

42.8

3

Dimethylolpropionic acid (DMPA)

8.37

4

Ethylene glycol (EG)

2.89

5

Trimethylolpropane (TMP)

1.54

6

β-Hydroxypropyl Methacrylate (HPMA)

5

7

Dibutyltin dilaurate (DBTDL)

0.15

8

Triethylamine (TEA)

6.27

9

Mixed Acrylic Monomer

230

10

water

590

[0036] 1) Preparation of vinyl-terminated polyurethane / acrylate aqueous dispersion

[0037] Put PPG (molecular weight 2000) into a stainless steel reaction kettle, vacuum dehydrate at 100°C for 2h; cool down to 80°C and add TDI, keep it at 85°C for 3h; cool down to 75°C, add hydrophilic monomer DMPA, ...

Embodiment 2

450

[0044] 1) Preparation of vinyl-terminated polyurethane / acrylate aqueous dispersion

[0045] Put polyoxyethylene diol (molecular weight 2000) into a stainless steel reaction kettle, vacuum dehydrate at 100°C for 2h; cool down to 80°C and add HDI, keep it at 85°C for 3h; cool down to 75°C, add hydrophilic monomer DMPA, Chain agent BDO and TMP, functional acrylate monomer HEMA, catalyst DBTDL, keep warm for 3 hours. Cool down to 40°C, add mixed acrylate monomers, add neutralizer TEA, stir for 5 minutes, add water under high-speed stirring to disperse into an emulsion, and obtain a vinyl-terminated polyurethane / acrylate aqueous dispersion.

[0046] The mixed acrylate monomer used is a mixture of methyl methacrylate (MMA), butyl acrylate (BA), ethyl acrylate (EA), acrylonitrile (AN), acrylic acid and the like.

[0047] 2) Preparation of core-shell waterborne polyurethane-acrylate emulsion

[0048] Stir the above aqueous dispersion with nitrogen for 15-30 minutes t...

Embodiment 3

440

[0052] 1) Preparation of vinyl-terminated polyurethane / acrylate aqueous dispersion

[0053] Put PTMG (molecular weight 2000) into a stainless steel reactor, vacuum dehydrate at 100°C for 2 hours; cool down to 80°C and add MDI, keep it at 85°C for 3 hours; cool down to 75°C, add hydrophilic monomer DMPA, chain extender NPG and GE , Functional acrylate monomer HEA, catalyst DBTDL, heat preservation reaction for 3h. Cool down to 40°C, add mixed acrylate monomers, add neutralizer TEA, stir for 5 minutes, add water under high-speed stirring to disperse into an emulsion, and obtain a vinyl-terminated polyurethane / acrylate aqueous dispersion.

[0054] The mixed acrylate monomer used is a mixture of methyl methacrylate (MMA), butyl acrylate (BA), ethyl acrylate (EA), acrylonitrile (AN), acrylic acid and the like.

[0055] 2) Preparation of core-shell waterborne polyurethane-acrylate emulsion

[0056] The above aqueous dispersion is stirred and passed through nitrogen...

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PUM

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Abstract

The invention discloses a method for polymerizing core-shell type aqueous polyurethane-polyacrylate (PUA) emulsion by in-situ radiation, relating to the production method and process which are applied to textiles coating agent products. The method possesses the advantages of in-situ emulsion polymerization and radiation polymerization during product preparation process, solving the problems that the emulsifier and organic cosolvents existing in the current products pollute the environment, the products are poor in water resistance, the polymerization rate is hardly controlled, and the products are not stable among production batches, etc. The products have the following advantages of excellent water resistance, heat resistance, resistance to chemicals and wear resistance as well as low cost, availability for textile printing adhesion auxiliaries, emission without emulsifier and volatile organic solvents, and compliance with the requirements of environmental protection.

Description

technical field [0001] The invention relates to a production method and process applied to textile coating agent products, in particular to a core-shell type waterborne polyurethane-acrylate emulsion in-situ radiation polymerization method. Background technique [0002] According to the statistics of the National Development and Reform Commission, in 2007, the total amount of fiber processing in my country was close to 35 million tons. Based on the current consumption ratio of printing and dyeing coating agents and fibers in my country at 3%, in 2007 alone, the output value of printing and dyeing coating agents can reach 2-3 billion RMB. With the development of the textile industry, technological progress and the launch of new products, it will inevitably drive the further development of printing and dyeing coating agents. [0003] Traditional printing and dyeing coating agents are mainly solvent-based, containing a large amount of organic aromatic solvents such as toluene a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/14C08F220/18C08F220/44C08F220/06C08F2/46C08G18/67D06M15/564
Inventor 吕建平朱守玉朱亮周静静赵军
Owner HEFEI JUHE RADIAL CHEM TECH
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