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Light-cured polyurethane associated thickener as well as preparation method and application thereof

An associative thickener, polyurethane technology, applied in coatings, anti-corrosion coatings, etc., can solve the problems of poor structural controllability, general thickening efficiency, and high raw material cost, achieve low raw material cost, improve physical and mechanical properties, Good thickening effect

Active Publication Date: 2021-07-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the cost of raw materials is high. At the same time, branched polyethylene glycol is easy to cause crosslinking, poor structure controllability, and general thickening efficiency.

Method used

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  • Light-cured polyurethane associated thickener as well as preparation method and application thereof
  • Light-cured polyurethane associated thickener as well as preparation method and application thereof
  • Light-cured polyurethane associated thickener as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Weigh β-hydroxyethyl acrylate (11.61g) and HT-600 (58.56g) according to the molar ratio of -OH to -NCO 1:3.2. Ethyl ester was slowly added dropwise into HT-600 dissolved with 1.75wt% BICAT8018, and kept at 40°C for 2.0h to obtain a colorless or light yellow isocyanate adduct containing active C=C.

[0053] (2) Weigh polyether polyol PEG-8000 (176g) and isocyanate adduct (7.02g) according to the molar ratio of -OH to -NCO 2:1, and first vacuum dehydrate the polyether polyol at 110°C 1h to make the water content lower than 500ppm, then, under the protection of inert gas, add the dehydrated polyether polyol to the isocyanate adduct, and keep the reaction at 75°C for 1h to obtain a polyurethane prepolymer containing terminal hydroxyl groups .

[0054] (3) Weigh n-hexadecanol (5.34g) and HMDI (5.77g) according to the molar ratio of polyether polyol to n-hexadecanol and HMDI 1:1:1, and under inert gas protection, n-hexadecanol Add it into the polyurethane prepolymer and...

Embodiment 2

[0056] (1) Weigh β-hydroxypropyl acrylate (13.01g) and HT-600 (58.56g) according to the molar ratio of -OH to -NCO 1:3.2, and mix β-hydroxypropyl acrylate (13.01g) with 30min under the protection of inert gas Propyl ester was slowly added dropwise into HT-600 dissolved with 1.75wt% BICAT8018, and kept at 60°C for 1.0h to obtain a colorless or light yellow isocyanate adduct containing active C=C.

[0057] (2) Weigh polyether polyol PEG-6000 (198g) and isocyanate adduct (7.16g) according to the molar ratio of -OH to -NCO of 3:1, and first vacuum dehydrate the polyether polyol at 110°C 1h to make the water content lower than 500ppm, then, under the protection of inert gas, add the dehydrated polyether polyol to the isocyanate adduct, and keep the reaction at 75°C for 1h to obtain a polyurethane prepolymer containing terminal hydroxyl groups .

[0058] (3) Weigh Guerbet alcohol sixteen (5.34g) and HMDI (8.66g) according to the molar ratio of polyether polyol to Guerbet alcohol si...

Embodiment 3

[0060] (1) Weigh β-hydroxyethyl acrylate (11.61g) and HT-600 (58.56g) according to the molar ratio of -OH to -NCO 1:3.2. Ethyl ester was slowly added dropwise into HT-600 dissolved with 2.5wt% BICAT8018, and kept at 40°C for 2.0h to obtain a colorless or light yellow isocyanate adduct containing active C=C.

[0061] (2) Weigh polyether polyol PEG-6000 (264g) and isocyanate adduct (7.02g) according to the molar ratio of -OH to -NCO of 4:1, and first vacuum dehydrate the polyether polyol at 110°C 1h to keep the water content below 500ppm, then, under the protection of an inert gas, add the dehydrated polyether polyol to the isocyanate adduct, and keep it at 45°C for 2.5h to obtain a polyurethane prepolymer containing terminal hydroxyl groups. things.

[0062] (3) Weigh n-dodecyl alcohol (4.10g) and IPDI (9.78g) according to the molar ratio of polyether polyol to n-dodecyl alcohol and IPDI 2:1:2, under inert gas protection, n-dodecyl alcohol Add it into the polyurethane prepoly...

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Abstract

The invention relates to a light-cured polyurethane associated thickener as well as a preparation method and application thereof. The light-cured polyurethane associated thickener is prepared from the following raw materials: an acrylate monomer containing a primary hydroxyl group, an HDI tripolymer, polyether polyol, long-carbon-chain fatty alcohol, diisocyanate, a catalyst and an optional alcohol ether solvent and / or water. The polyurethane thickener is mainly applied to a water-based UV coating, not only has higher thickening efficiency, but also can improve the physical and mechanical properties and chemical reagent resistance of a paint film due to the fact that the molecular structure contains photocurable C = C and HDI tripolymer rigid six-membered rings with relatively high activity, so that the polyurethane thickener has a wide industrial application prospect.

Description

technical field [0001] The invention relates to the preparation of a special rheological additive for water-based UV coatings, in particular to a novel photocurable polyurethane thickener and a preparation method and application thereof. Background technique [0002] Traditional UV coatings contain a large amount of active diluents, which are highly irritating and toxic, and the active monomers volatilized during the construction process will cause serious damage to the ecosystem. With the increasing awareness of human environmental protection, countries have successively formulated strict laws and regulations to limit the emission of VOCs. Therefore, it is the general trend to carry out "oil-to-water" in the field of coatings. In recent years, water-based UV coatings have developed rapidly due to their advantages of low toxicity, safety, environmental protection, and convenient construction. In order to make water-based UV coatings applicable to various coating methods (su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/67C08G18/79C08G18/30C09D5/08C09D7/43
CPCC08G18/12C08G18/6666C08G18/672C08G18/792C08G18/4833C09D7/43C09D5/08C08G2150/90C08G18/2825
Inventor 沈如宝秦佃斌冯聪聪冯秉哲朱传坤
Owner WANHUA CHEM GRP CO LTD
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