Branching type aqueous polyurethane association type thickener and preparation method thereof

A technology of associative thickener and water-based polyurethane, which is applied in the field of thickeners, can solve the problems of cumbersome synthesis of hydrophobic diol and star polyethylene glycol and difficulties in practical application, and achieve low construction viscosity, low cost, The effect of good application prospects

Inactive Publication Date: 2018-02-23
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of its hydrophobic diol and star polyet...

Method used

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  • Branching type aqueous polyurethane association type thickener and preparation method thereof
  • Branching type aqueous polyurethane association type thickener and preparation method thereof
  • Branching type aqueous polyurethane association type thickener and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The preparation method of branched waterborne polyurethane associative thickener in the present embodiment is as follows:

[0036] (1) Dehydration treatment

[0037] Add 50 g of polyethylene glycol with a molecular weight of 6000 g / mol into the reactor, raise the temperature to 110° C. for vacuum dehydration for 3 h;

[0038] (2) Prepolymerization

[0039] The polyethylene glycol after dehydration is cooled to 55 ℃, under the protection of nitrogen, the DMF solution of isophorone diisocyanate (IPDI) is added dropwise with stirring, the quality of isophorone diisocyanate is 3.70g, after dropping, in Insulate at 55°C for 30 minutes, then raise the temperature to 80°C for 3 hours to obtain a prepolymer.

[0040] (3) Semi-capping reaction

[0041] After the prepolymerization reaction was completed, the temperature of the system was kept at 80° C., 2.02 g of cetyl alcohol and 0.06 g of dibutyltin dilaurate were added to the system for half-capping reaction, and the reac...

Embodiment 2

[0048] The preparation method of branched waterborne polyurethane associative thickener in the present embodiment is as follows:

[0049] (1) Dehydration treatment

[0050] Add 50 g of polyethylene glycol with a molecular weight of 2000 g / mol into the reactor, and raise the temperature to 110° C. for vacuum dehydration for 3 h;

[0051] (2) Prepolymerization

[0052] The polyethylene glycol after dehydration is cooled to 55 ℃, under the protection of nitrogen, the acetone solution of isophorone diisocyanate (IPDI) is added dropwise with stirring, the quality of isophorone diisocyanate is 11.1g, after dropping, in Insulate at 55°C for 30 minutes, then raise the temperature to 80°C for 3 hours to obtain a prepolymer.

[0053] (3) Semi-capping reaction

[0054] After the prepolymerization reaction was completed, the temperature of the system was kept at 80° C., and 6.06 g of cetyl alcohol and 0.06 g of dibutyltin dilaurate were added to the system for half-capping reaction, ...

Embodiment 3

[0059] The preparation method of branched waterborne polyurethane associative thickener in the present embodiment is as follows:

[0060] (1) Dehydration treatment

[0061] Add 50 g of polyethylene glycol with a molecular weight of 4000 g / mol into the reactor, and raise the temperature to 110° C. for vacuum dehydration for 3 h;

[0062] (2) Prepolymerization

[0063] The polyethylene glycol after the dehydration is cooled to 55 ℃, under the protection of nitrogen, the acetone solution of isophorone diisocyanate (IPDI) is added dropwise with stirring, the quality of isophorone diisocyanate is 5.56g, after dropping, in Insulate at 55°C for 30 minutes, then raise the temperature to 80°C for 3 hours to obtain a prepolymer.

[0064] (3) Semi-capping reaction

[0065] After the prepolymerization reaction was completed, the temperature of the system was kept at 80° C., 3.03 g of cetyl alcohol and 0.06 g of dibutyltin dilaurate were added to the system for half-capping reaction, ...

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Abstract

The invention discloses a branching type aqueous polyurethane association type thickener and a preparation method thereof. The preparation method comprises: adding an isocyanate solution into dewatered polyethylene glycol in a dropwise manner, and carrying out a polymerization reaction to prepare a prepolymer; adding a catalyst and long-chain alkanol, and carrying out a semi-end-capping reaction;and cooling to a temperature of 50-80 DEG C, adding a chain extender, and carrying out a chain extension reaction to obtain the branching type aqueous polyurethane association type thickener. According to the present invention, the prepared branching type aqueous polyurethane association type thickener has a plurality of hydrophobic long chains in the structure, has the large molecular weight, andcan form the complete and stable hydrophobic association type network structure in an aqueous phase or an emulsion system, such that the branching type aqueous polyurethane association type thickenerhas strong thickening performance and good stability.

Description

technical field [0001] The invention relates to a thickener, in particular to a branched waterborne polyurethane associative thickener and a preparation method thereof. Background technique [0002] Waterborne polyurethane associative thickener is a new kind of environment-friendly thickener. Its properties in solution are similar to surfactants. It is composed of lipophilic-hydrophilic-oleophilic triblock structure polymer. Due to its unique molecular structure, its thickening mechanism and rheology are different from traditional thickeners. Compared with traditional thickeners, waterborne polyurethane associative thickeners have stronger thickening ability and better leveling properties. It has good storage stability, is not easy to grow mildew, and has high film fullness, which has attracted widespread attention. [0003] The structure of the traditional polyurethane associative thickener is relatively simple. It is usually a prepolymer prepared by the reaction of exces...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/34C08G18/32C08G18/28
CPCC08G18/2825C08G18/4833C08G18/6688C08G18/6692C08G18/755
Inventor 杨建军宋忠奥吴庆云吴明元张建安
Owner ANHUI UNIVERSITY
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