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Waterborne polyurethane sand-fixing agent and preparation method thereof

A water-based polyurethane and sand-fixing agent technology, which is applied in chemical instruments and methods, applications, organic fertilizers, etc., can solve the problems of solvent-based polyurethane, such as high toxicity, poor use safety, and environmental pollution, and achieve favorable survival and growth, water retention performance Enhanced, Inexpensive Effects

Inactive Publication Date: 2012-01-04
江苏瑞丰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of solvent-based polyurethane such as high toxicity, flammability, poor safety in use, and environmental pollution, and to provide a non-toxic, non-polluting, N, P, K nutritional ingredient, etc. Advantages of Waterborne Polyurethane Sand Fixing Agent

Method used

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  • Waterborne polyurethane sand-fixing agent and preparation method thereof
  • Waterborne polyurethane sand-fixing agent and preparation method thereof
  • Waterborne polyurethane sand-fixing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037]In the reactor that stirrer, thermometer, reflux condenser are equipped with, add polyoxypropylene glycol (molecular weight is 2000) 80g, 1,6-hexamethylene diisocyanate 13.5g, dimethylolpropionic acid 2.9g, heat up to 80°C, add 0.04g of dibutyltin dilaurate, and react for 4 hours under stirring to obtain a polyurethane prepolymer whose terminal groups are mainly isocyanate groups; then cool down to about 35°C, and add 0.6g of γ-aminopropyl Triethoxysilane, continue to react for 1h to obtain a prepolymer with a viscosity of 8000mPa.s, add 40g of acetone to reduce the viscosity to 3000mPa.s, and add 2.1g of potassium phosphate, 2.4g of ammonium phosphate, and 20g of deionized water. solution to neutralize the prepolymer to form a salt, then add 123 g of deionized water under high-speed shearing, and finally heat up and distill 19 g of acetone to obtain a bluish milky white water-based polyurethane dispersion. Its properties are as follows: solid content: 38.1%; PH value: 6...

Embodiment 2

[0039] In the reactor that stirrer, thermometer, reflux condenser are equipped with, add polyoxypropylene glycol (molecular weight is 2000) 70g, polyether glycol (molecular weight is 1000) 10g, toluene diisocyanate 14.6g, and prior Dissolve the solution obtained with 8g of N-methylpyrrolidone and 2.8g of dimethylolpropionic acid, stir and heat up to 70°C, and continue the reaction for 4h to obtain a polyurethane prepolymer whose terminal groups are mainly isocyanate groups; cool down to 35°C About, add 0.8g triethanolamine, react for 1h, get a prepolymer with a viscosity of 8000mPa.s, add 43g acetone to reduce the viscosity to 2400mPa.s, and add 1.1g potassium phosphate, 3.8g ammonium phosphate, 20g deionized water The formed solution neutralizes the prepolymer to form a salt, then adds 130 g of deionized water under high-speed shearing, heats up and distills 21 g of acetone to obtain a bluish milky white aqueous polyurethane dispersion. Its performance is as follows: solid co...

Embodiment 3

[0041] In the reactor that stirrer, thermometer, reflux condenser are equipped with, add polyoxypropylene glycol (molecular weight is 2000) 80g, isophorone diisocyanate 18.1g, dimethylol propionic acid 2.7g, be warming up to 80°C, add 0.03g of dibutyltin dilaurate, react for 4 hours under stirring, and obtain a polyurethane prepolymer whose terminal groups are mainly isocyanate groups; then cool down to about 35°C, add 0.6g of γ-aminopropyl three Ethoxysilane, continue to react for 1h to obtain a prepolymer, add 46g butanone to reduce the viscosity to 2400mPa.s, and add a solution consisting of 2.1g dipotassium hydrogen phosphate, 1.8g diammonium hydrogen phosphate, and 20g deionized water The prepolymer was neutralized into a salt, then 108 g of deionized water was added under high-speed shearing, and finally 25 g of methyl ethyl ketone was evaporated to obtain a bluish milky white aqueous polyurethane dispersion. Its properties are as follows: solid content: 41.5%; PH value:...

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Abstract

The invention discloses a waterborne polyurethane sand-fixing agent and a preparation method thereof; the sand-fixing agent is inner crosslinking type waterborne polyurethane dispersion agent which contains neutralizer of kali salt of phosphoric acid and ammonium salt, wherein the solid content of the neutralizer is 30-45%, and the pH value of the neutralizer is 6-8. The preparation method comprises the following steps of: forming a prepolymer through the polymerization reaction of polyether polyol, diisocyanate, dihydromethyl propionic acid, the neutralizer, an inner crosslinking agent, a cosolvent and a catalytic agent, and then adding deionized water to the prepolymer for emulsification to obtain the sand-fixing agent. The waterborne polyurethane sand-fixing agent has the advantages ofwide suitable temperature range, non-toxicity, non-combustion, safety in use, free of environmental pollution and richness in nutrition and the like. As the environmental-friendly nutritional type sand-fixing agent, the waterborne polyurethane sand-fixing agent can be applied to the field of agriculture and forestry.

Description

technical field [0001] The invention relates to an environment-friendly nutritional sand-fixing agent, in particular to a water-based polyurethane sand-fixing agent and a preparation method thereof. Background technique [0002] Desertification has become one of the major environmental problems in the world and has attracted widespread attention from all over the world. my country has carried out desertification research and prevention and control for half a century, but desertification land has been expanding at an accelerated rate. The latest data show that the national desertified land area accounts for 18.2% of the national land area, and the annual desertified land area is still 1283km 2 The rate of spread is equivalent to losing the land area of ​​a medium-sized county every year. June 17, 2009 is the fifteenth "World Day to Combat Desertification and Drought". The advocacy theme determined by the United Nations is "Conserving Land and Water - Securing Our Common Fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/30C09K17/52C09K101/00
Inventor 杜峰项尚林方显力鲁钢潘志刚
Owner 江苏瑞丰科技实业有限公司
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