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Hydrophilic polyurethane polymer and preparation method thereof

A hydrophilic polyurethane and polymer technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve the problems of complicated sulfamic acid process, achieve good water dispersibility, and improve acid and alkali resistance Effect

Pending Publication Date: 2022-03-04
佛山市华联有机硅有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of sulfamic acid by this method needs to be carried out in an organic solvent and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of hydrophilic modifier composition A.

[0026] The raw materials and dosage are shown in Table 1.

[0027] Table 1

[0028] .

[0029] Preparation process: Add 1,3 propane sultone into a three-necked round bottom flask equipped with mechanical stirring, a thermometer and a constant pressure funnel, and drop 1,3 propane sultone into the reaction system within 15-45 minutes Inside, react at room temperature for 4 hours, then add the alkyl tertiary amine dropwise into the reaction system, react at room temperature for 4 hours, continue to heat up to 80°C and react for 4 hours to obtain a yellow viscous liquid, which is recorded as a hydrophilic modifier Composition A.

Embodiment 2

[0031] Preparation of Hydrophilic Modifier Composition B.

[0032] The raw materials and dosage are shown in Table 2.

[0033] Table 2

[0034] .

[0035] Preparation process: Add 1,3 propane sultone into a three-necked round bottom flask equipped with mechanical stirring, a thermometer and a constant pressure funnel, and drop 1,3 propane sultone into the reaction system within 15-45 minutes Inside, react at room temperature for 4 hours, then add the alkyl tertiary amine dropwise into the reaction system, react at room temperature for 4 hours, continue to heat up to 80°C and react for 4 hours to obtain a yellow viscous liquid, which is recorded as a hydrophilic modifier Composition B.

Embodiment 3

[0037] Preparation of Hydrophilic Modifier Composition C.

[0038] The raw materials and dosage are shown in Table 3.

[0039] table 3

[0040] .

[0041] Preparation process: Add 1,3 propane sultone into a three-necked round bottom flask equipped with mechanical stirring, a thermometer and a constant pressure funnel, and drop 1,3 propane sultone into the reaction system within 15-45 minutes Inside, react at room temperature for 4 hours, then add the alkyl tertiary amine dropwise into the reaction system, react at room temperature for 4 hours, continue to heat up to 80°C and react for 4 hours to obtain a yellow viscous liquid, which is recorded as a hydrophilic modifier Composition C.

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Abstract

The invention relates to a hydrophilic polyurethane polymer and a preparation method thereof, and is characterized in that the hydrophilic polyurethane polymer is prepared from the following components by mass: 2-5 parts of a hydrophilic modifier composition, 95-98 parts of polyisocyanate, and 0.5-1 part of a neutralizer. The hydrophilic modifier composition comprises polyether sulfonic acid and sulfamic acid, and the polyether sulfonic acid and the sulfamic acid are prepared according to the molar ratio of 1: 0.8-1: 6. The preparation method of the hydrophilic modifier composition comprises the following steps: adding amino polyether into excessive sultone, reacting at room temperature for 4-8 hours to generate polyether type sulfonic acid, adding alkyl tertiary amine into a reaction system, reacting at room temperature for 4-8 hours to generate sulfamic acid, and dissolving the sulfamic acid in the polyether type sulfonic acid; and continuously heating to 60-100 DEG C, and reacting for 4-8 hours. The invention has the advantages of good water dispersion performance, wide application range and the like.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a hydrophilic polyurethane polymer and its preparation method and application. Background technique [0002] At present, as our country is focusing on the construction of ecological civilization with unprecedented efforts, more and more attention is paid to the protection of the ecological environment. Water-based paint is harmless to the human body and does not pollute the environment, so it has become one of the research hotspots in the field of paint technology. Due to the excellent physical and chemical properties of polyurethane, two-component waterborne polyurethane coatings are widely used. [0003] The two-component waterborne polyurethane coating is composed of waterborne hydroxyl resin and waterborne polyurethane curing agent. Polyurethane curing agent needs to be modified to give it water dispersibility. At present, the modification methods of polyureth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/50C08G18/38C09D175/08C09D5/08
CPCC08G18/6666C08G18/5072C08G18/3857C09D175/08C09D5/08
Inventor 薛瑜军陈林卢锦丰肖燕平陈志英
Owner 佛山市华联有机硅有限公司
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