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Aqueous polyurethane resin and preparation method thereof

A water-based polyurethane and polyester diol technology, which is applied in the field of high-temperature resistant water-based polyurethane resin and its preparation, can solve the problem that the water-based polyurethane resin is not perfect, the high-temperature resistance, water resistance, and alcohol resistance of the water-based polyurethane resin cannot meet the requirements. Water-based polyurethane performance is not ideal and other problems, to achieve excellent high temperature resistance, good alcohol resistance

Inactive Publication Date: 2013-01-09
山东奥德美高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the incomplete research on water-based polyurethane resin, there are still many unsatisfactory properties of water-based polyurethane resin. For example, the high-temperature resistance, water resistance, and alcohol resistance of water-based polyurethane resin film formation cannot meet the requirements.

Method used

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  • Aqueous polyurethane resin and preparation method thereof
  • Aqueous polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment one: a kind of aqueous polyurethane resin, preparation method is as follows:

[0040] 1 Prepare materials according to the following components and ratios:

[0041] Polyester diol 1000 molecular weight 50KG, (2000 molecular weight is 100KG), polytetrahydrofuran ether glycol PTMG 1000 molecular weight 40KG, (2000 molecular weight 80KG), TMP 1KG, hydrogenated phenylmethane diisocyanate (H 12 MDI) 60KG, dimethylolpropionic acid DMPA 5KG, 1,4 cyclohexane dimethanol 6KG, or 1,4 butanediol 3KG.

[0042] 2 Raw material mixing, heating, dehydration

[0043] Measure polyester diol and polytetrahydrofuran ether diol, add chain extender trimethylolpropane (TMP), stir the three evenly and heat to 120 degrees, dehydrate under vacuum for 1 hour, and then cool down to 80-95 degrees.

[0044] 3 Prepolymer Synthesis:

[0045] Add hydrogenated phenylmethane diisocyanate (H12MDI) into the diol, control the temperature at 80-95 degrees, stir and react for 2 hours, then add hy...

Embodiment 2

[0050] Embodiment two: a kind of aqueous polyurethane resin, obtains by following preparation method:

[0051] 1 Prepare materials according to the following components and ratios:

[0052] Polyester diol 1000 molecular weight 60KG, (2000 molecular weight is 120KG), polytetrahydrofuran ether glycol PTMG1000 molecular weight, (2000 molecular weight 100KG), TMP 2KG, hydrogenated phenylmethane diisocyanate (H12MDI) 120Kq dimethylol Propionic acid DMPA7.5KG, 1,4 cyclohexane dimethanol 8Kq or 1,4 butanediol 5KG

[0053] 2 Raw material mixing, heating, dehydration

[0054] Measure polyester diol and polytetrahydrofuran ether glycol PTMG, add chain extender trimethylolpropane (TMP), stir the three evenly and heat to 120 degrees, dehydrate under vacuum for 1 hour, then cool down to 80-95 degrees .

[0055] 3 Prepolymer Synthesis:

[0056] Add hydrogenated phenylmethane diisocyanate (H12MDI) into the diol, control the temperature at 80-95 degrees, stir and react for 2 hours, then a...

Embodiment 3

[0061] Embodiment three: a kind of aqueous polyurethane resin, obtains by following preparation method:

[0062] 1 Prepare materials according to the following components and ratios:

[0063] 70KG of polyester diol 1000 molecular weight, (140KG of 2000 molecular weight), 55KG of polytetrahydrofuran ether glycol PTMG1000 molecular weight, (110KG of 2000 molecular weight), TMP 2.5KG, 1, hydrogenated phenylmethane diisocyanate (H 12 MDI) 95KG, dimethylolpropionic acid DMPA 10KG, 1,4 cyclohexanedimethanol 10KG, or 1,4 butanediol 6KG.

[0064] 2 Raw material mixing, heating, dehydration

[0065]Measure polyester diol and polytetrahydrofuran ether glycol PTMG, add chain extender trimethylolpropane (TMP), stir the three evenly and heat to 120 degrees, dehydrate under vacuum for 1 hour, then cool down to 80-95 degrees .

[0066] 3 Prepolymer Synthesis:

[0067] Hydrogenated phenylmethane diisocyanate (H 12 MDI) is added to the glycol, the temperature is controlled at 80-95 degree...

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Abstract

The invention relates to an aqueous polyurethane resin and a preparation method thereof. The coating comprises the following components in percentage by weight: 24.5-28% of polytetramethylene ether glycol, 30-37% of polyester divalent alcohol, 28-37% of hydrogenated phenyl methane diisocyanate (H12MD1), 3-3.5% of hydrophilic chain extender, 2-10% of chain extender and 1.5-4% of N-methyl pyrrolidone (NMP), wherein the polyester divalent alcohol is synthetized by taking dibasic acid mainly containing isophthalic acid and divalent alcohol as the basis, and the molecular weight thereof is 1000-2000. The preparation technology comprises the following steps: according to the above components and content (wt%), preparing materials, mixing, heating and dewatering raw materials, synthetizing prepolymer, neutralizing and scattering the prepolymer, expanding chains, desolventizing, emulsifying and the like. Compared with the product in the prior art, the coating of the invention has excellent thermostability, water tolerance and alcohol resistance. Especially, the thermostability is characterized by resisting the high temperature of 120 DEG C after membranes are formed, and the aqueous polyurethane resin does not become soft or white.

Description

technical field [0001] The invention relates to a polyurethane resin and a preparation method thereof, in particular to a high-temperature-resistant water-based polyurethane resin and a preparation method thereof. Background technique [0002] Water-based polyurethane uses water as the dispersion medium, which has the advantages of non-toxic, non-flammable, non-polluting, energy-saving, safe and reliable, and meets the development requirements of green industry. Therefore, water-based polyurethane resin has gained widespread attention and attention at home and abroad in recent years. [0003] However, due to the incomplete research on water-based polyurethane resin, there are still many unsatisfactory performances of water-based polyurethane resin. The invention studies the high temperature resistance, water resistance, alcohol resistance and other aspects of the waterborne polyurethane resin. Contents of the invention [0004] The purpose of the present invention is to o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D175/06C08G18/66C08G18/12
Inventor 董其兴孙晓泽
Owner 山东奥德美高分子材料有限公司
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