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A kind of synthetic method of organosilicon modified waterborne polyurethane resin

A water-based polyurethane and synthesis method technology, applied in the field of resin synthesis, can solve the problems of affecting resin adhesion, short service life, inconvenience, etc., achieve mature and stable production process, prevent uneven stirring, and prevent viscosity increase.

Active Publication Date: 2018-08-28
TONGGUANG JIANGSU INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the synthesis of one-component water-based polyurethane resin generally has a low hardness of the film after drying, which is lower than 1H or barely reaches 1H. There are almost no 2H in the market, and high hardness will affect the adhesion of the resin on the substrate.
Some water-based polyurethane resins used in plastic paints, wood paints, metal paints, etc. require the film hardness to be 2H or above. It is very inconvenient to waste, so it is necessary to develop a one-component high-hardness water-based polyurethane resin, while taking into account the adhesion to the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare one-component high-hardness silicone-modified waterborne polyurethane resin according to the following steps:

[0031] Equipped with raw materials:

[0032] raw material

Dosage (% by weight)

2,4-Toluene diisocyanate

32.8

Polyester polyol Novomer (molecular weight 1000)

43.5

Dimethylolpropionic acid

5.9

Methylpropanediol

3.4

Trimethylolpropane

4.9

Triethylamine

4.5

KH550

5

[0033] Also equipped with appropriate amount of water, acetone, N-methylpyrrolidone;

[0034] The molecular weight of polyester polyol Novomer is about 1000, the carboxyl content is about 3%, and the silicone content is about 1%. The molar ratio is as follows: 2,4-toluene diisocyanate: polyester polyol Novomer: dimethylol propionic acid : Methylpropanediol: Trimethylolpropane: Triethylamine: KH550 is about 3.8:1.0:1.0:0.8:1.2:1.0:1.3.

[0035] The appearance of the prepared resin is a translucent yellowi...

Embodiment 2

[0037] Prepare one-component high-hardness silicone-modified waterborne polyurethane resin according to the following steps:

[0038] Equipped with raw materials:

[0039] raw material

Dosage (% by weight)

Isophorone diisocyanate

33.6

Polyester polyol Novomer (molecular weight 1000)

43.5

Dimethylolpropionic acid

5.9

Neopentyl glycol

5.5

Trimethylolpropane

2.6

Triethylamine

4.5

KH550

3

Ethylenediamine

1.4

[0040] Also equipped with appropriate amount of water, acetone, N-methylpyrrolidone;

[0041] The molecular weight of polyester polyol Novomer is about 1000, the carboxyl content is about 4.2%, and the silicone content is about 1.2%. The molar ratio is as follows: isophorone diisocyanate: polyester polyol Novomer: dimethylol propionic acid: Neopentyl glycol: trimethylolpropane: triethylamine: KH550: ethylenediamine is about 3.6:1.0:1.0:0.8:1.2:1.0:1.3:0.3.

[0042] The appeara...

Embodiment 3

[0044] Prepare one-component high-hardness silicone-modified waterborne polyurethane resin according to the following steps:

[0045] Equipped with raw materials:

[0046] raw material

Dosage (% by weight)

Isophorone diisocyanate

35.2

Polyester polyol Novomer (molecular weight 2000)

40.3

Dimethylolpropionic acid

6.5

1,4-Butanediol

4.6

Trimethylolpropane

2.6

Triethylamine

5

KH602

3

isophorone diamine

2.8

[0047] Also equipped with appropriate amount of water, acetone, N-methylpyrrolidone;

[0048] The molecular weight of polyester polyol Novomer is about 2000, the carboxyl content is about 5.1%, and the silicone content is about 1.7%. The molar ratio is as follows: isophorone diisocyanate: polyester polyol Novomer: dimethylol propionic acid: 1,4-Butanediol: Trimethylolpropane: Triethylamine: KH602: Isophoronediamine is about 3.8:1.0:1.0:1.5:1.2:1.0:1.3:0.7.

[0049] The appearan...

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Abstract

The invention discloses a synthetic method for organosilicone modified waterborne polyurethane resin. The synthetic method comprises the specific steps that firstly, polyester polyol Novomer is subjected to vacuum dehydration, diisocyanate is added dropwise, and a polyurethane prepolymer I is obtained after a reaction; secondly, polyhydroxy carboxylic acid is added to the polyurethane prepolymer I, a dihydric alcohol monomer is added dropwise, and a polyurethane prepolymer II is obtained after a reaction; thirdly, trimethylolpropane is added to the polyurethane prepolymer II, and a polyurethane prepolymer is obtained after a reaction; fourthly, organic amine is added to the polyurethane prepolymer for a salt forming reaction, a silane coupling agent, deionized water and diamine are sequentially added for chain extension and stirring, and the organosilicone modified waterborne polyurethane resin with high hardness is obtained after emulsification. The synthetic method has the advantages that the hardness of the organosilicone modified waterborne polyurethane resin reaches 3H, the adhesive force is good, and stability is good.

Description

technical field [0001] The invention relates to a method for synthesizing a resin, in particular to a method for synthesizing an organosilicon-modified waterborne polyurethane resin. Background technique [0002] In the application field of coatings, due to the excellent chemical properties and relatively comprehensive mechanical and physical properties of polyurethane resin, the coating film after curing has good wear resistance and chemical resistance, and is often used in metal anti-corrosion, automotive coating, aircraft coating Leather, floor paint, road marking paint, etc. However, most polyurethane coatings contain more organic solvents and a certain amount of free isocyanate, thus affecting the environment and people's health during construction and application. Water-based polyurethane uses water as the dispersion medium. Compared with solvent-based polyurethane, it has the advantages of non-combustibility, low odor, non-toxic, non-polluting, energy-saving, and con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/10C08G18/44C08G18/66C08G18/32C08G18/38
CPCC08G18/10C08G18/44C08G18/664C08G18/6644C08G18/6651C08G18/6662C08G18/3206C08G18/3228C08G18/348C08G18/3893
Inventor 陈重光万江黄星
Owner TONGGUANG JIANGSU INFORMATION TECH CO LTD
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