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Alkali swelling and association type thickening agent and preparation method thereof

An alkali-swollen associative and thickener technology, applied in the direction of coating, can solve problems such as poor stability and achieve good stability

Active Publication Date: 2018-07-20
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are many types of alkali-swellable associative thickeners for coatings in this field, they still have poor stability and are easily affected by the amount of residual solvent in the water-based system, additives such as dispersants, and the ion concentration of the system. defect

Method used

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  • Alkali swelling and association type thickening agent and preparation method thereof
  • Alkali swelling and association type thickening agent and preparation method thereof
  • Alkali swelling and association type thickening agent and preparation method thereof

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preparation example Construction

[0034] The present invention also includes a method for preparing an alkali-swellable associative thickener, comprising:

[0035] S101. The nonionic surfactant accounting for 0-100% of the total mass of nonionic surfactant and the anionic surfactant accounting for 0-100% of the total mass of anionic surfactant are placed in the reaction flask as a compound emulsifier, and then added Deionized water accounting for 30%-100% of the total mass of deionized water is stirred and heated to 80°C-90°C; in this step, no nonionic surfactant and / or anionic surfactant may be added;

[0036] S102. Add methacrylic acid, ethyl acrylate, polyurea crosslinking monomer, initiator, nonionic surfactant accounting for 0-100% of the total mass of nonionic surfactant, accounting for 0-100% of the total mass of anionic surfactant % anions and deionized water accounting for 0-70% of the total mass of deionized water are mixed to obtain a stable pre-emulsion, which is added dropwise into a reaction bott...

Embodiment 1

[0042] Preparation of Polyurea Crosslinking Monomer

[0043] 1) Add 84g (0.5mol) isophordionediamine (IPDA) into the reaction flask, then cool down the reaction system, when the temperature of the system drops to 10°C-15°C, start to drop 133.2g (0.6mol) ) isophordione diisocyanate (IPDI), the control drop time is 1 hour, after the drop is completed, it is incubated for 2h, and the discharging obtains the polyurea prepolymer;

[0044] 2) Take 217.2g of the above-mentioned polyurea prepolymer (0.2mol of isocyanate in the terminal group) and add it into the reaction flask, then control the temperature of the reaction system. When the system temperature is 25°C-30°C, start to drop 21.2g of acrylic acid β -Hydroxyethyl ester, control the dropping time to 1 hour, keep warm for 2 hours after the dropping is completed, and obtain the polyurea crosslinking monomer after discharging.

Embodiment 2

[0046] Alkali-swellable associative thickener ZC-1 was prepared according to the distribution ratio of each component in the following table 1

[0047] Table 1, ZC-1 group distribution ratio

[0048]

[0049]

[0050] S101. Put the nonionic surfactant and the anionic surfactant in the reaction flask as a composite emulsifier, then add deionized water accounting for 30% of the total mass of deionized water and stir to raise the temperature to 85° C.;

[0051] S102. Mix methacrylic acid, ethyl acrylate, polyurea crosslinking monomer, initiator and remaining deionized water to obtain a stable mixed solution, drop it into the reaction bottle within 3 hours, and keep it warm for 2 hours, that is Alkali-swellable associative thickener ZC-1 was obtained.

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Abstract

The invention discloses an alkali swelling and association type thickening agent. The alkali swelling and association type thickening agent is prepared from the following components in percentage by mass: 10 percent to 15 percent of methacrylic acid, 15 percent to 20 percent of ethyl acrylate, 0.1 percent to 5 percent of a polyurea cross-linked monomer, 0.1 percent to 3 percent of a hydrophobic association monomer, 0.5 percent to 2 percent of an anionic surfactant, 0.2 percent to 0.1 percent of a non-ionic surfactant, 0.1 percent to 1 percent of an initiator and the balance of de-ionized water. The alkali swelling and association type thickening agent disclosed by the invention is not easily influenced by a residual solvent in a waterborne system, auxiliary agents including a dispersant and the like and an ion concentration of the system, and has good stability.

Description

technical field [0001] The invention relates to the field of thickeners, in particular to an alkali-swellable associative thickener and a preparation method thereof. Background technique [0002] Hydrophobic modified alkali-swellable associative thickener (HASE) is a kind of rheological additive used in water-based coatings, generally through methacrylic acid (MAA), ethyl acrylate (EA), hydrophobic association monomer (AM ) prepared by emulsion copolymerization. Adding alkali-swelling associative thickener (HASE) to the paint can effectively adjust the viscosity of the system, effectively prevent the settlement of pigments and fillers when the paint is standing still, and prevent the coating from sagging and improve the leveling of the paint when the paint is sprayed. performance, ensure the appearance quality of the coating, and avoid film-forming defects. At present, although there are many types of alkali-swellable associative thickeners for coatings in this field, they...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/18C08F220/06C08F2/26C08F2/30C09D7/43
CPCC08F2/26C08F2/30C08F220/06C08F290/062C08F290/067C08F220/18
Inventor 马智俊王木立张东阳营飞顾斌朱东戴礼勃
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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