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Comb polyurethane associated thickener and preparation method and application thereof

A technology of associative thickener and polyurethane, which is applied in application, adhesive additives, preparations for toiletry, etc. It can solve the problems of system viscosity increase and other problems, and achieve the effect of increasing viscosity, low construction viscosity and improving quality

Inactive Publication Date: 2010-01-27
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrophilic end of the polyurethane associative thickener associates with water molecules through hydrogen bonds, and the hydrophobic end associates with emulsion particles and pigment particles to form a network structure, resulting in an increase in the viscosity of the system

Method used

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  • Comb polyurethane associated thickener and preparation method and application thereof
  • Comb polyurethane associated thickener and preparation method and application thereof
  • Comb polyurethane associated thickener and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Synthesis of hydrophobic diols

[0052] Put 0.1 mol of dodecylamine into a 250ml three-neck flask with a condenser, magnetic stirring, and nitrogen inlet, fill it with nitrogen, and add 0.25 mol of n-butyl glycidyl ether dropwise at 50°C for 30 minutes, then raise the temperature to React at 80°C for 10 hours, and finally distill under reduced pressure to remove unreacted reaction products, and titrate their hydroxyl value Qv=269.7mgKOH / g.

[0053] (2) Synthesis of comb-like polyurethane associative thickener

[0054] Add 3.3mmol (20.0g) of polyethylene glycol 6000 and 50g of toluene into a 250ml three-neck flask equipped with mechanical stirring, water separator and nitrogen inlet, first azeotropic dehydration for 2-3 hours, then cool down to 70°C, and add 0.03g Dibutyltin dilaurate and 4.7mmol (1.04g) of isophorone diisocyanate were reacted for 2h. After the prepolymerization reaction was completed, the temperature was raised to 80°C and 1.1mmol (0.35g) of the hy...

Embodiment 2

[0064] (1) Synthesis of hydrophobic diols

[0065] Put 0.1 mol of hexadecylamine into a 250ml three-neck flask equipped with a condenser, magnetic stirring, and nitrogen inlet, fill it with nitrogen, and add 0.25 mol of n-butyl glycidyl ether dropwise at 60°C for 30 minutes, then raise the temperature to React at 90°C for 8h, and finally distill under reduced pressure to remove the unreacted reaction product, and titrate its hydroxyl value Qv=240.0mgKOH / g.

[0066] (2) Synthesis of comb-like polyurethane associative thickener

[0067] Add 10.0mmol (20.0g) of polypropylene glycol 2000 and 50g of toluene into a 250ml three-neck flask equipped with mechanical stirring, a water separator, and a nitrogen inlet, first azeotropically dehydrate for 2-3 hours, then cool down to 50°C, and add 0.03g of octanoic acid sulfide Tin and 12.0 mmol (2.02 g) of 1,6-hexamethylene diisocyanate were reacted for 6 hours. After the prepolymerization reaction was completed, the temperature was raised...

Embodiment 3

[0074] (1) Synthesis of hydrophobic diols

[0075] Put 0.1mol of n-octylamine into a 250ml three-neck flask equipped with a condenser, magnetic stirring, and nitrogen inlet, fill it with nitrogen, and add 0.2mol of n-butyl glycidyl ether dropwise at 40°C for 20 minutes, then raise the temperature to React at 50°C for 15 hours, and finally distill under reduced pressure to remove unreacted reaction products, and titrate its hydroxyl value Qv=225.3mgKOH / g.

[0076] (2) Synthesis of comb-like polyurethane associative thickener

[0077] Add 2.0mmol (20.0g) of polyethylene glycol 10000 and 50g of toluene into a 250ml three-neck flask equipped with mechanical stirring, water separator and nitrogen inlet, first azeotropic dehydration for 2-3 hours, then cool down to 70°C, and add 0.03g Dibutyltin dilaurate and 4.0mmol (1.05g) of dicyclohexylmethane diisocyanate were reacted for 4h. After the prepolymerization reaction was completed, the temperature was raised to 90°C and 1.5mmol (0....

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Abstract

The invention discloses a comb polyurethane associated thickener and a preparation method and an application thereof and the preparation method comprises the following steps: adopting primary amine and diglycidyl ether to react, obtaining hydrophobic diol; then adopting polyether diol, catalyst, diisocyanate, hydrophobic diol and alkanol to react, using precipitate for precipitation after finishing the reaction, drying the precipitation and obtaining the comb polyurethane associated thickener. More than two hydrophobic groups (long chain alkyl) in the molecules of the comb polyurethane associated thickener so that the consistency of the emulsion paint can be greatly improved, the emulsion paint has not only high viscosity under low shear but also low applicable viscosity under high shear, and the quality of the emulsion paint is increased. The polyurethane associated thickener is applicable to thickening the water-containing system and can be used in emulsion paint, varnish, adhesive, leather, papermaking, dyeing and printing, ink, cosmetics and the like.

Description

technical field [0001] The invention relates to a thickener, in particular to a comb-like polyurethane associative thickener and its preparation method and application. Background technique [0002] With the enhancement of people's awareness of environmental protection, water-based coatings have become one of the main development directions of the coatings industry due to their advantages of reducing environmental pollution, improving operating conditions and construction environment, and saving a large amount of organic solvents. Latex paint is an important representative variety of water-based paint. Latex paint includes four processes including manufacturing, storage, construction and leveling from preparation to film formation. In different processes, the requirements for the viscosity of the coating system are also different. For example, during the storage of latex paint, it is necessary to maintain a high low-shear viscosity for a long time to prevent the dispersed p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/10C09D7/12C09J11/08C09D11/00D06P1/52A61K8/87D21H19/62
Inventor 吕满庚黄艳玲梁利岩郭建维
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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