Acrylic acid non-aqueous dispersoid containing amino ester bonds and siloxy groups and preparation method thereof

A non-aqueous dispersion and siloxane-based technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problem of not much polar group content, solvent resistance, chemical resistance, and water resistance of the coating film Not as good as other problems, to achieve excellent solvent resistance, improve the effect of adhesion

Active Publication Date: 2011-04-13
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since most of the solvents used in acrylic non-aqueous dispersions are aliphatic hydrocarbon solvents with weak polarity or non-polarity, the content of polar groups cannot be very large. Therefore, after the acrylic non-aqueous dispersion coating is formed, the coating resistance Solvent resistance, chemical resistance, and water resistance are inferior to traditional solvent-based two-component acrylic resins

Method used

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  • Acrylic acid non-aqueous dispersoid containing amino ester bonds and siloxy groups and preparation method thereof
  • Acrylic acid non-aqueous dispersoid containing amino ester bonds and siloxy groups and preparation method thereof
  • Acrylic acid non-aqueous dispersoid containing amino ester bonds and siloxy groups and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 prepares the acrylic acid non-aqueous dispersion A containing urethane bond and siloxane group

[0027] ① Preparation of dispersion stabilizer

[0028](1) Preparation of raw materials

[0029] The raw material formula that is used to synthesize the prepolymer containing urethane bond is shown in Table 1

[0030] Table 1

[0031] raw material name

Dosage, g (equivalent to mol)

Hexamethylene diisocyanate (molecular weight 168)

158(0.941)

Propylene glycol (molecular weight 76)

47.6(0.627)

Hydroxyethyl Acrylate (Molecular Weight 116)

36.31(0.313＝1 / 3×0.941)

Dodecyl ammonia (molecular weight 185)

57.91(0.313＝1 / 3×0.941)

total

300g

[0032] Explanation: In Table 4, the molar ratio of hexamethylene diisocyanate to propylene glycol is 0.941:0.627, which is equivalent to 3:2, that is, n=3;

[0033] All the other raw material formulations for the synthesis of dispersion stabilizer are sh...

Embodiment 2

[0045] Embodiment 2 prepares the acrylic acid nonaqueous dispersion B containing urethane bond and siloxane group

[0046] ① Preparation of dispersion stabilizer

[0047] (1) Preparation of raw materials

[0048] The raw material formulation that is used to synthesize the prepolymer containing urethane bond is shown in Table 4

[0049] Table 4

[0050] raw material name

Dosage, g (equivalent to mol)

Hexamethylene diisocyanate (molecular weight 168)

168.0(1)

Butanediol (molecular weight 90)

72.0(0.8)

Hydroxyethyl Acrylate (Molecular Weight 116)

23.2(0.2＝1 / 5×1)

Dodecyl ammonia (molecular weight 185)

37.0(0.2＝1 / 5×1)

total

300g

[0051] Explanation: In Table 4, the molar ratio of hexamethylene diisocyanate to propylene glycol is 1:0.8, which is equivalent to 5:4, that is, n=5;

[0052] All the other raw material formulations for the synthesis of dispersion stabilizer are shown in Table 5

[0053] t...

Embodiment 3

[0064] Embodiment 3 prepares the acrylic acid nonaqueous dispersion C containing urethane bond and siloxane group

[0065] ① Preparation of dispersion stabilizer

[0066] (1) Preparation of raw materials

[0067] The raw material formula table 7 that is used for synthesizing the prepolymer containing urethane bond.

[0068] Table 7

[0069] raw material name

Dosage, g (equivalent to mol)

[0070] Hexamethylene diisocyanate (molecular weight 168)

174.89(1.041)

Butanediol (molecular weight 90)

80.28(0.892)

Hydroxyethyl Acrylate (Molecular Weight 116)

17.28(0.149＝1 / 7×1.041)

Dodecyl ammonia (molecular weight 185)

27.57(0.149＝1 / 7×1.041)

total

300g

[0071] Explanation: In Table 7, the molar ratio of hexamethylene diisocyanate to propylene glycol is 1.041:0.892, which is equivalent to 7:6, that is, n=7;

[0072] All the other raw material formulations for the synthesis of dispersion stabiliz...

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Abstract

The invention relates to an acrylic acid non-aqueous dispersoid containing amino ester bonds and siloxy groups and a preparation method thereof. The non-aqueous dispersoid consists of a dispersion stabilizer, a dispersion phase and a dispersion medium; based on solids, the dispersion stabilizer and the dispersion phase accounts for 50 to 80 weight percent of the non-aqueous dispersoid, wherein the weight ratio of the dispersion stabilizer and the dispersion phase is 1:3-10; the weight-average molecular weight of the non-aqueous dispersoid is 20,000 to 30,000; the dispersion stabilizer is polyurethane modified acrylic polymer, and has the weight-average molecular weight of 10,000 to 15,000; the dispersion phase is gelled grafted siloxane acrylic polymer, and the siloxane monomer accounts for 0.5 to 5 weight percent; and aliphatic hydrocarbon solvents at least accounts for 80 weight percent of the dispersion medium. After the non-aqueous dispersoid is used as a hydroxyl component to be prepared into a double-component polyurethane coating, the double-component polyurethane coating has the tolerance for solvents, chemicals, water, acids and alkalis superior to that of a coating prepared from a common polyhydroxy acrylic acid non-aqueous dispersoid.

Description

technical field [0001] The invention relates to an acrylic non-aqueous dispersion containing urethane bond and siloxane group and a preparation method thereof. The non-aqueous dispersion is especially suitable as a hydroxyl component for preparing two-component polyurethane coatings. Background technique [0002] Acrylic non-aqueous dispersion is a kind of resin in which high polymer colloidal particles are dispersed and stabilized in aliphatic hydrocarbon-based solvents. The use of aliphatic hydrocarbon solvents that are not harmful air pollutants replaces most commonly used high photochemically active solvents such as toluene, xylene, and butyl acetate, reducing the emission of harmful air pollutants. The acrylic acid non-aqueous dispersion coating prepared with it has the advantages of low pollution, and has a certain scale in the Japanese market, and has a good application in building exterior wall coatings (new construction, repainting), heavy-duty anti-corrosion coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L33/08C08L33/10C08L51/08C08G18/67C08F290/06C08F220/14C08F220/18C08F212/08C08F220/28C08F230/08C09D175/04
Inventor 周铭丁帮勇丁道宁穆颖陈瑞芳
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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