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Water-based polyurethane solution and preparation process thereof

A water-based polyurethane and emulsion technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as environmental pollution, endangering the health of production workers, etc., and achieve the effects of protecting the environment, good water resistance, and reducing energy use

Inactive Publication Date: 2011-04-06
ZHEJIANG FEIDA ZHONGKE FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its components contain a large amount of organic solvents, which seriously endanger the health of production workers during construction and cause serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Aqueous polyurethane emulsion, each component distribution ratio is by mass the polyester polyol of 13 parts, the dimethylol propionic acid of 1.75 parts, the isophorone diisocyanate (IPDI) of 14.5 parts, the AS-15 of 0.13 parts, 1.35 parts of 1,4-butanediol, 1.35 parts of triethylamine, 1.15 parts of ethylenediamine, 5.0 parts of N-methylpyrrolidone (NMP), 1.5 parts of acetone, 0.15 parts of dibutyltin dilaurate (DBTDL), 62.5 parts of distilled water, 13.5 parts of ammonia and 1.65 parts of SC-100. The polyester polyol is a polyester polyol with M=1000. The AS-15 is imported refined castor oil with three -OH functional groups; the SC-100 is aziridine.

[0015] The preparation process of water-based polyurethane emulsion, first vacuum dehydrate polyester polyol at 120°C for 1-2 hours, then cool down to 80°C and add isophorone diisocyanate, then raise the temperature to 90°C for 2 hours, then cool down to 80°C Add DMPA and N-methylpyrrolidone at ℃ to continue the react...

Embodiment 2

[0018] Water-based polyurethane emulsion, each component distribution ratio by mass is 14 parts of polyester polyol, 1.55 parts of dimethylol propionic acid, 13.0 parts of isophorone diisocyanate, 0.15 parts of AS-15, 1.50 parts of 1,4-butanediol, 1.50 parts of triethylamine, 1.3 parts of ethylenediamine, 6.0 parts of N-methylpyrrolidone, 1.0 parts of acetone, 0.10 parts of dibutyltin dilaurate, 61.63 parts of distilled water, 14.0 parts of ammonia and 1.8 parts of SC-100. The preparation process is the same as in Example 1.

Embodiment 3

[0020] Water-based polyurethane emulsion, each component distribution ratio by mass is 12 parts of polyester polyol, 2.0 parts of dimethylol propionic acid, 15.5 parts of isophorone diisocyanate, 0.12 parts of AS-15, 1.21 parts of 1,4-butanediol, 1.20 parts of triethylamine, 1.0 parts of ethylenediamine, 4.0 parts of N-methylpyrrolidone, 2.0 parts of acetone, 0.20 parts of dibutyltin dilaurate, 64.1 parts of distilled water, 13 parts ammonia and 1.50 parts SC-100. The preparation process is the same as in Example 1.

[0021] The water-based polyurethane emulsion of the present invention is mainly used on the surface of woodware, and requires a certain gloss and hardness, and has the characteristics of water resistance, alcohol resistance, anti-sticking and the like. 1. Gloss: 60° gloss meter is required for testing. Greater than 80; 2. Hardness: pencil hardness ≥ H; 3. Water resistance: ≥ 72h, no whitening, no foaming; 4. Alcohol resistance: 50 alcohol 2h, no foaming, no whi...

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Abstract

The invention discloses water-based polyurethane solution and a preparation process thereof. The preparation process comprises the following steps of: dewatering polyester polyol for 1 to 2h under vacuum at the temperature of 120 DEG C; cooling to 80 DEG C and adding isophorone diisocyanate into the dewatered polyester polyol; heating to 90 DEG C and reacting for 2h; cooling to 80 DEG C and adding dimethylol propionic acid (DMPA) and N-methylpyrrolidone into the mixed solution and continuously reacting for 1h; cooling to 60 DEG C, adding AS-15, 1,4-butanediol and dibutyltin dilaurate into the mixed material, adding acetone for adjusting viscosity and reacting; cooling to below 50 DEG C, adding triethylamine, stirring for 0.5h and obtaining a pre-polymer; cooling to below 15 DEG C, dispersing distilled water at the temperature of below 15 DEG C into the prepolymer for 5 minutes at a high speed, instantly adding ethylenediamine for chain extension, dispersing for 0.5h at a high speed and then dispersing for 1h at an intermediate speed; removing acetone under vacuum, adjusting pH to 7.5 with ammonia water and then adding SC-100 into the mixed solution; stirring uniformly, filtering and then packaging. The water-based polyurethane solution has high water resistance, alcohol resistance and hardness; and water is used as a solvent, so that the use of energy resources such as petroleum is reduced and environment is protected at the same time.

Description

【Technical field】 [0001] The invention relates to the field of synthesis of water-based polyurethane emulsion, in particular to water-based polyurethane emulsion applied to woodware and a preparation process thereof. 【technical background】 [0002] Most of the coatings currently used in wood finishing are oily two-component polyurethane paints. It has high hardness, high gloss, good adhesion, especially good fullness, excellent leveling, and good cost performance. However, its components contain a large amount of organic solvents, which seriously endanger the health of production workers during construction and cause serious environmental pollution. Especially with the increasing shortage of global energy, the prices of oil and coal have been rising, resulting in a gradual increase in their costs. At the same time, the country advocates a low-carbon economy out of the need for environmental protection, so it has issued a series of policies and regulations to restrict the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C09D175/06
Inventor 彭军朱国强毛赵国吴法理袁华龙吕君
Owner ZHEJIANG FEIDA ZHONGKE FINE CHEM
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