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Preparation method of acrylate graft-modification waterborne polyurethane resin

A technology of water-based polyurethane and graft modification, applied in the direction of coating, etc., can solve the problems of poor water resistance, solvent resistance, chemical resistance, mechanical strength, poor resistance to organic solvents, and low softening point, and achieve molecular structure Good control, stable resin performance and good mechanical properties

Inactive Publication Date: 2016-11-16
TONGGUANG JIANGSU INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based polyurethane also has the disadvantages of poor water resistance, solvent resistance, chemical resistance and mechanical strength. Acrylic resin has the advantages of cheap price, high mechanical strength, aging resistance, anti-yellowing and good water resistance. , but there are disadvantages such as poor resistance to organic solvents, poor heat resistance, low softening point, and poor wear resistance.

Method used

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  • Preparation method of acrylate graft-modification waterborne polyurethane resin
  • Preparation method of acrylate graft-modification waterborne polyurethane resin
  • Preparation method of acrylate graft-modification waterborne polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare acrylate grafting modified waterborne polyurethane resin according to the following steps:

[0032] Equipped with raw materials:

[0033]

[0034]

[0035] Also equipped with appropriate amount of deionized water, acetone (diluent), N-methylpyrrolidone;

[0036] The molecular weight of polyester polyol Novomer is about 1000, the content of carboxyl group is about 5%, the content of hydroxyethyl acrylate is about 5.2%, the content of hydroquinone is about 0.001%, and the content of acrylic acid monomer is about 21%. The molar ratio is as follows : 2,4-Toluene diisocyanate: Polyester polyol Novomer: Dimethylolpropionic acid: Methylpropylene glycol: Hydroxyethyl acrylate: Triethylamine is about 3.8:1.0:1.0:0.6:1.2:1.0.

[0037] The appearance of the prepared resin is a milky white emulsion with blue light, the solid content is about 36%, the emulsion has good stability, the hardness is >3H, the adhesion is 0 grade, water resistance and aging resistance.

Embodiment 2

[0039] Prepare acrylate grafting modified waterborne polyurethane resin according to the following steps:

[0040] Equipped with raw materials:

[0041] raw material

Dosage (g)

Isophorone diisocyanate

33.6

Polyester polyol Novomer (molecular weight 1000)

43.5

Dimethylolpropionic acid

5.2

Neopentyl glycol

5.5

Dibutyltin dilaurate

0.1

Hydroxyethyl methacrylate

2.6

Methyl methacrylate

8.7

Isobornyl Methacrylate

3.3

acrylic acid

0.9

Quinol

0.01

Azobisisobutyronitrile

0.1

Triethanolamine

4.5

[0042] Also equipped with appropriate amount of deionized water, acetone (diluent), N-methylpyrrolidone;

[0043] The molecular weight of polyester polyol Novomer is about 1000, the content of carboxyl group is about 4.2%, the content of hydroxyethyl methacrylate is about 2.5%, the content of hydroquinone is about 0.001%, and the content of dibutyltin dilau...

Embodiment 3

[0047] Prepare acrylate grafting modified waterborne polyurethane resin according to the following steps:

[0048] Equipped with raw materials:

[0049] Also equipped with appropriate amount of deionized water, acetone (diluent), N-methylpyrrolidone;

[0050] The molecular weight of polyester polyol Novomer is about 2000, the content of carboxyl group is about 6%, the content of hydroxypropyl methacrylate is about 2.5%, the content of hydroquinone is about 0.001%, and the content of dibutyltin dilaurate is about 0.01%. The content of acrylic acid monomer is about 17%, and the molar ratio is as follows: Isophorone diisocyanate: Polyester polyol Novomer: Dimethylol propionic acid: 1,4-Butanediol: Hydroxypropyl methacrylate: Tri Ethylamine is about 3.8:1.0:1.0:0.6:1.2:1.0.

[0051] The appearance of the prepared resin is a milky white emulsion with blue light, the solid content is about 40%, the emulsion has good stability, the hardness is >3H, the adhesion is 0 grade, water re...

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Abstract

The invention discloses a preparation method of acrylate graft-modification waterborne polyurethane resin. The preparation method comprises the following steps of vacuum dewatering polyester polyol Novomer, dropwise adding diisocyanate after nitrogen is introduced, and reacting to obtain a polyurethane prepolymer I; then adding polyhydroxy carboxylic acid into the polyester polyol Novomer, dropwise adding dihydric alcohol monomer, and reacting to obtain a polyurethane prepolymer as shown in the description; dropwise adding acrylic monomer into the polyurethane prepolymer as shown in the description to obtain polyurethane acrylate oligomer; adding organic amine into the polyurethane acrylate oligomer to carry out salt forming reaction, then adding deionized water and emulsifying to obtain the acrylate graft-modification waterborne polyurethane resin. The acrylate graft-modification waterborne polyurethane resin has the advantages that the overall performance of waterborne polyurethane and acrylic acid is taken into consideration, the hardness is high (greater than 3H), the adhesive force is 0 level, the water resistance and the aging resistance are both excellent, the comprehensive performance of waterborne polyurethane synthesized by the polyester polyol Novomer is improved, the cost is reduced, and the cost performance and the competitiveness are improved.

Description

technical field [0001] The invention relates to a preparation method of waterborne polyurethane resin, in particular to a preparation method of acrylate graft modified waterborne polyurethane resin. Background technique [0002] Waterborne polyurethane is odorless, zero VOC, energy-saving and environmentally friendly, easy to operate, and has excellent physical and chemical properties, such as: chemical stability, friction resistance, toughness, elasticity, and has been widely used as a coating on plastic, wood, metal and other substrates Finishing, and the application field is still expanding. However, water-based polyurethane also has the disadvantages of poor water resistance, solvent resistance, chemical resistance and mechanical strength. Acrylic resin has the advantages of cheap price, high mechanical strength, aging resistance, anti-yellowing and good water resistance. , but there are also disadvantages such as poor resistance to organic solvents, poor heat resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/18C08F220/06C08G18/67C08G18/66C08G18/42C08G18/34C08G18/32C08G18/10C09D151/08
CPCC08F283/006C08G18/10C08G18/4266C08G18/672C09D151/08C08G18/348C08G18/3206C08G18/0823C08G18/6659C08G18/664C08F220/14
Inventor 陈重光万江黄星
Owner TONGGUANG JIANGSU INFORMATION TECH CO LTD
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