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High-performance environment-friendly type water-borne polyurethane and preparation method thereof

A water-based polyurethane, environmentally friendly technology, used in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve the problems of single product variety, low solid content of emulsion, incomplete environmental protection, etc. Achieve the effect of low resin viscosity, high solid content and wide application range

Active Publication Date: 2013-08-07
DONGGUAN CTL NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past research, there are mainly the following problems: the product variety is single, and the solid content of the emulsion is low; the isocyanate is mainly aromatic and not resistant to yellowing; a large amount of acetone and organotin catalysts are used, which is not completely environmentally friendly; polyols are mainly based on Mainly polyether type, poor overall performance
It is believed that NMP will be banned soon
Third, polyether polyols and toluene diisocyanate were mostly used in previous patents, and the products produced were comparable to foreign mainstream polyester-based waterborne polyurethanes in terms of heat resistance, strength, bonding strength, and storage stability. big difference

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Add 200g of polyester polyol B-3320 (molecular weight: 2000) to a 1000mL flask, vacuum dehydrate at 100°C for 1 hour, cool down to 80°C, add 66.6g of IPDI, keep the temperature at 90°C for 2.5h, cool down to 70°C, add 9.8g of hydrophilic The permanent chain extender DMBA, 1.2g chain extender 1,4-butanediol and 0.02g catalyst BiCAT were reacted at 70°C for 3h. Cool down to 35°C and add 20g of acetone, put the prepolymer into an emulsification tank, add 8.4g of triethylamine, stir and disperse for 5 minutes, then add 350g of deionized water to emulsify under high-speed stirring, add 6g of IPDA aqueous solution and stir for 1 hour at constant temperature , Acetone was removed under reduced pressure, and a high-performance environmentally friendly water-based polyurethane emulsion was obtained. The solid content of the emulsion was measured to be 45%, the tensile strength of the film was 17.2MPa, and the elongation at break was 430%. Use it to make printing glue, and after ...

Embodiment 2

[0086] Add 90g polyester polyol B-3330 (molecular weight 3000), 48g polycarbonate diol CD210 (molecular weight 1000), 34g polycaprolactone diol 220N (molecular weight 2000) into a 1000mL flask, and vacuum dehydrate at 100°C 1h, cool down to 80°C and add 93.4g of IPDI, keep the temperature at 90°C for 2h, cool down to 65°C, add 12.2g of hydrophilic chain extender DMBA, 8.9g of 1,6-hexanediol, 2.4g of trimethylolpropane and 0.03 g catalyst BiCAT, 65 ℃ heat preservation reaction for 4h. Cool down to 35°C and add 28g of acetone, transfer the prepolymer into an emulsification tank, add 10.4g of triethylamine, stir and disperse for 5 minutes, then add 460g of deionized water to emulsify under high-speed stirring, add 7.6g of IPDA aqueous solution and stir for 1.5 Hours, the acetone is removed under reduced pressure to obtain a high-performance, environment-friendly water-based polyurethane emulsion. The measured solid content of the emulsion was 40%, the tensile strength of the fil...

Embodiment 3

[0088] Add 52g polyester polyol B-3320 (molecular weight 2000), 86.5g polycaprolactone 220N (molecular weight 2000), 61.5g polybutylene adipate PBA (molecular weight 2000) Diacid polyester polyol), vacuum dehydration at 100°C for 1h, cooling to 80°C, adding 42.4g HDI, keeping the temperature at 80°C for 2.5h, cooling to 60°C, adding 12.6g hydrophilic chain extender DMBA, 0.6g three Methylolpropane and 0.03 g catalyst BiCAT were reacted at 60°C for 4h. Cool down to 35°C and add 45g of acetone, transfer the prepolymer into an emulsification tank, add 10.8g of triethylamine, stir and disperse for 5 minutes, then add 490g of deionized water to emulsify under high-speed stirring, stir at constant temperature for 2 hours, and remove under reduced pressure Acetone, that is, high-performance environment-friendly water-based polyurethane emulsion. The measured solid content of the emulsion is 35%, the tensile strength of the film is 5.80 MPa, and the elongation at break is 660%. The w...

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Abstract

The invention discloses high-performance environment-friendly type water-borne polyurethane. The high-performance environment-friendly type water-borne polyurethane is mainly prepared from the following materials in parts by weight: 80-100 parts of polyester polyol, 20-56 parts of aliphatic diisocyanate, 3.5-10 parts of hydrophilic chain extender, 0-8 parts of micromolecule chain extender, 0.01-0.05 part of environment-friendly type catalyst, 5-30 parts of solvent with a low boiling point, 3-12 parts of neutralizer, 0-10 parts of post chain extender and 160-400 parts of deionized water. The invention further discloses a preparation method of the polyurethane. The polyurethane is free of toxic and harmful substances including an organic tin catalyst, N-methylpyrrolidone, a solvent with a high boiling point and the like, capable of satisfying the requirements of latest EU environmental standard rules, anti-yellowing, extremely good in water and heat resistance, good in adhesion resistant adhesion, strong in storage stability, good in gloss, high in solid content and excellent in comprehensive performance.

Description

technical field [0001] The invention relates to a high-performance environment-friendly water-based polyurethane and a preparation method thereof. Background technique [0002] Water-based polyurethane uses water as the dispersion medium. Compared with solvent-based polyurethane, it has the advantages of non-combustibility, low odor, energy saving and environmental protection, and convenient operation. my country began to study water-based polyurethane in the 1970s, and its research direction is mainly water-based polyurethane leather finishing agent. After the 1990s, the application of water-based polyurethane continued to expand, and it has certain industrial applications in PVC bonding, automotive interior parts, textile functional finishing, coatings, and coatings. After entering the 21st century, the continuous expansion of applications, especially the increasing environmental protection requirements worldwide, has accelerated the pace of development of the waterborne ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/73C08G18/75C08G18/22C09D175/06C09D11/00C09J175/06
Inventor 卢开平刘志富卢润初麦友攀吕增兴苏飞洞
Owner DONGGUAN CTL NEW MATERIAL TECH
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