Biodegradable waterborne polyurethane sand fixing agent and preparation method thereof

A water-based polyurethane, biodegradable technology, applied in chemical instruments and methods, fertilizer mixtures, applications, etc., can solve the problems of polluted environment, chemical sand fixation agent is not biodegradable, lack of nutrients required for plant growth, etc. Low cost, beneficial to survival and growth, good application value and promotion prospects

Active Publication Date: 2012-04-18
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 provide a biodegradable, non-toxic, non-polluting, N, P, Biodegradable water-based polyurethane sand-fixing agent with K nutrients and other advantages

Method used

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  • Biodegradable waterborne polyurethane sand fixing agent and preparation method thereof
  • Biodegradable waterborne polyurethane sand fixing agent and preparation method thereof
  • Biodegradable waterborne polyurethane sand fixing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035]Polyethylene glycol 400, glycerin and concentrated sulfuric acid (mass concentration is 98.3% sulfuric acid solution) are mixed uniformly by the mass proportion of 100:20:5 and are made into compound liquefaction reagent, this liquefaction reagent and cornstarch are in mass ratio 4 : 1 After mixing, transfer to a three-necked bottle equipped with a stirrer and a condenser, and keep the temperature in an oil bath to 120°C in advance, and heat the reaction under stirring for 2 hours under reflux, and immediately transfer to a temperature lower than 40°C after the reaction is completed. Cooled to room temperature in cold water to obtain a biodegradable oligomeric polyol with a hydroxyl value of 280 mgKOH / g.

[0036] In the reactor equipped with agitator, thermometer and reflux condenser, add the above-mentioned biodegradable oligomeric polyol 60g, 1,6-hexamethylene diisocyanate 37.6g, dimethylol propionic acid 3.0g, and heat up to 80°C, add 0.05g of dibutyltin dilaurate, an...

Embodiment 2

[0038] Polyethylene glycol 400, glycerin and concentrated sulfuric acid (sulfuric acid solution with a concentration of 98.3%) are uniformly mixed in a mass ratio of 100:10:5 to form a composite liquefaction reagent. Mix the prepared liquefaction reagent and bagasse in a mass ratio of 5:1, transfer to a three-necked bottle equipped with a stirrer and a condenser, and keep the temperature in an oil bath to 130°C in advance, and heat to reflux under stirring After 1.5 hours, transfer to cold water below 40°C immediately after the reaction, and cool to room temperature to obtain a biodegradable oligomeric polyol with a hydroxyl value of 230 mgKOH / g.

[0039] In a reactor equipped with a stirrer, a thermometer, and a reflux condenser, add 60 g of the above-mentioned biodegradable oligomeric polyol, 10 g of toluene diisocyanate, 28.1 g of isophorone diisocyanate, and 2.8 g of dimethylol propionic acid. g, 0.06g of dibutyltin dilaurate, stirring to raise the temperature to 70°C, and...

Embodiment 3

[0041] Polyethylene glycol 400, glycerin and concentrated sulfuric acid (concentration is 98.3% sulfuric acid solution) are mixed uniformly by the mass ratio of 100:30:1 to form composite liquefaction reagent, and prepared liquefaction reagent and cornstarch are prepared by mass ratio 3 : 1 After mixing, transfer to a three-necked bottle equipped with a stirrer and a condenser, and keep the temperature in an oil bath to 140°C in advance, and heat the reaction under stirring for reflux for 1h, and immediately transfer to a temperature lower than 40°C cooled to room temperature to obtain a biodegradable oligomeric polyol with a hydroxyl value of 210 mgKOH / g.

[0042] All the other steps are the same as in Example 1. The properties of the obtained biodegradable water-based polyurethane dispersion are as follows: solid content: 38.4%; pH value: 6.5, viscosity at 25°C is 105mPa.s, average particle size is 240nm, storage stability is greater than 6 months, and the dispersion is stab...

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Abstract

The invention discloses a biodegradable waterborne polyurethane sand fixing agent and a preparation method thereof. The sand fixing agent is obtained by taking biodegradable oilgomer polyols of which the hydroxyl value is 200-400 mgKOH / g as a raw material and taking ammonia water as a neutralizing agent with a stepwise polymerization method; and the solid content of the sanding fixing agent is 30-45 percent, the pH value is 6-8, and the viscosity at the temperature 25 DEG C is 20-500 mPa.s. In the stepwise polymerization method, a polymerization reaction is undergone on biodegradable oilgomerpolyols of which the hydroxyl value is 200-400 mgKOH / g, diisocyanate, dimethylolpropionic acid, a neutralizing agent, a latent solvent and a catalyst to form a performed polymer, and deionized water is added for emulsifying to obtain the sand fixing agent. The biodegradable waterborne polyurethane sand fixing agent has the advantages of biodegradability, nontoxicity, incombustibility, using safety, environmental friendliness, rich in nutrition and the like; and as an ecological nutrient sand fixing agent, the biodegradable waterborne polyurethane sand fixing agent can be applied to the fieldsof agriculture, forestry, construction and the like.

Description

technical field [0001] The invention relates to an ecological nutritional sand-fixing agent, in particular to a biodegradable water-based polyurethane sand-fixing agent and a preparation method thereof. Background technique [0002] Desertification is a major global ecological environment problem that mankind is facing at present, perplexing the survival and development of human society, and my country is one of the countries seriously endangered by desertification. The ever-intensifying sandstorms and the expansion of desertified land have made the ecological environment worse, engulfing the living space of the Chinese nation, and causing great harm to the national economy and social development. At the same time, there are often a series of ecological problems such as strong winds, drifting sand, surface drought, and soil erosion in the desert and the bordering areas of the desert. A series of agricultural and forestry problems caused by this have seriously hindered the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/72C08G18/66C08G18/48C08G18/34C08J3/03C09K17/30
Inventor 杜峰项尚林方显力
Owner 江苏瑞丰科技实业有限公司
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