Degradable waterborne polyurethane, and preparation method and applications thereof

A water-based polyurethane and polyurethane prepolymer technology, applied in polyurea/polyurethane coatings, coatings, conductive coatings, etc., can solve the problems of insufficient color fastness of printed images, poor ink absorption effect, and easy generation of static electricity. Shorten the reaction catalysis time, good biodegradation advantages, and accelerate the effect of biodegradability

Active Publication Date: 2016-06-22
江苏华信高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a degradable water-based polyurethane to overcome the disadvantages of insufficient color fastness of printed images, low surface energy, poor ink absorption effect and easy generation of stati...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Put 100g of dehydrated lactic acid and 2g of 1,4-butanediol into a 500ml four-neck flask and mix thoroughly, raise the temperature to 122°C at a rate of 3°C / min, continue esterification for 3.5 hours, and remove small molecular impurities by vacuuming under reduced pressure Finally, add 0.2g organic bismuth catalyst, continue to heat up to 185°C at a rate of 3°C / min, and stop heating for 8 hours for constant temperature polycondensation reaction. After cooling down, the product is dissolved in chloroform, and then precipitated with absolute ethanol. After the drying treatment, 38 g of hydroxyl-terminated polybutylene lactate was obtained.

[0077] Add 30g of polybutylene lactate and 6g of polybutylene succinate into a 500ml four-neck flask, mix at 125°C to form a molten mixture, then vacuum dry for 1 hour, and cool to 50°C; Add a dibasic isocyanate mixture containing 26 g of isophorone diisocyanate and 10 g of hexamethylene diisocyanate into a four-neck flask to form a ...

Embodiment 2

[0091] Put 100g of dehydrated lactic acid and 2g of 1,4-butanediol into a 500ml four-neck flask and mix thoroughly, raise the temperature to 122°C at a rate of 3°C / min, continue esterification for 3.5 hours, and remove small molecular impurities by vacuuming under reduced pressure Finally, add 0.2g organic bismuth catalyst, continue to heat up to 185°C at a rate of 3°C / min, and stop heating for 8 hours for constant temperature polycondensation reaction. After cooling down, the product is dissolved in chloroform, and then precipitated with absolute ethanol. After the drying treatment, 38 g of hydroxyl-terminated polybutylene lactate was obtained.

[0092]Add 30g of polybutylene lactate and 12g of polybutylene succinate into a 500ml four-neck flask, mix at 130°C to form a molten mixture, then vacuum dry for 2 hours, and cool to 60°C; Add a dibasic isocyanate mixture containing 22 g of isophorone diisocyanate and 11 g of hexamethylene diisocyanate into a four-neck flask to form a...

Embodiment 3

[0106] Put 100g of dehydrated lactic acid and 2g of 1,4-butanediol into a 500ml four-neck flask and mix thoroughly, raise the temperature to 122°C at a rate of 3°C / min, continue esterification for 3.5 hours, and remove small molecular impurities by vacuuming under reduced pressure Finally, add 0.2g organic bismuth catalyst, continue to heat up to 185°C at a rate of 3°C / min, and stop heating for 8 hours for constant temperature polycondensation reaction. After cooling down, the product is dissolved in chloroform, and then precipitated with absolute ethanol. After the treatment, 38 g of hydroxyl-terminated polybutylene lactate was obtained.

[0107] Add 28g of polybutylene lactate and 7g of polybutylene succinate into a 500ml four-neck flask, mix at 128°C to form a molten mixture, then vacuum dry for 1.5 hours, and cool to 58°C; Add a dibasic isocyanate mixture containing 25 g of isophorone diisocyanate and 9 g of hexamethylene diisocyanate into a four-neck flask to form a raw m...

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Abstract

The invention discloses a degradable waterborne polyurethane, and a preparation method and applications thereof, and belongs to the technical field of high-molecular material. The preparation method comprises following steps: lactic acid is reacted with 1, 4-butanediol so as to prepare hydroxyl-terminated polylactic acid butanediol ester; polymerization reaction of a binary isocyanate mixture of isophorone diisocyanate and hexamethylene diisocyanate, with a binary polyester diol mixture of polylactic acid butanediol ester and poly(butylene succinate) is carried out, a certain amount of a hydroxied acrylate is added into an obtained reaction system, triethylamine is used for neutralization, and ethylenediamine is used for a second time of chain extension; an appropriate amount of ultrafine silica is added; and an obtained product is mixed with accessory ingredients such as a defoaming agent, an anti-adhesive, and an antistatic agent so as to obtain the degradable waterborne polyurethane. The degradable waterborne polyurethane is low in preparation cost, and excellent in printing effect; and coating layers are capable of adapting PHA smart card material laser printing, and possess degradability.

Description

technical field [0001] The invention relates to degradable waterborne polyurethane and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] In recent years, the global biotechnology and industry have shown a trend of accelerated development, and the development plan of emerging industries requires the promotion of the industrialization of bioplastics. With excellent biodegradability, biocompatibility and renewable biopolyester - PHA (polyhydroxyalkanoate), has become one of the focus of research and industrialization in the field of biomanufacturing, and because of its card The product has excellent mechanical properties and degradable properties, as well as good heat resistance and resilience, making it the best choice for the new generation of smart card substrates. [0003] Due to the wide application of degradable smart cards and the increasing environmental pressure of the current social and econom...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/73C08G18/67C08G18/66C08G18/42C08G18/34C08G18/12C09D175/06C09D5/24C09D7/12
Inventor 周建石吴彬王瑜王光战
Owner 江苏华信高新材料有限公司
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