Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

polycarbonate diol

A polycarbonate diol and repeating unit technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as strong interaction, poor dispersion stability, and high viscosity

Active Publication Date: 2018-10-16
ASAHI KASEI KK
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when polycarbonate diols are used in coating compositions, high viscosity and large amounts of solvents are required
Furthermore, the polycarbonate diol has a strong intermolecular interaction, so there is a problem that the dispersion stability of additives such as pigments is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • polycarbonate diol
  • polycarbonate diol
  • polycarbonate diol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Put 275g (3.1mol) of dimethyl carbonate, 500g (4.8mol) of 1,5-pentanediol, 490g (4.2mol) of ) 1,6-hexanediol. 0.2 g of tetrabutyl titanate was added as a catalyst to the aforementioned flask, and the mixture in the aforementioned flask was stirred and heated under normal pressure. The reaction temperature was set at 190° C., and the reaction was carried out for 12 hours while distilling off a mixture of methanol and dimethyl carbonate generated. Thereafter, the pressure in the flask was reduced to 12 kPa, and the reaction was further performed at 195° C. for 5 hours while distilling off diol and dimethyl carbonate. Thereafter, 0.22 g of 2-ethylhexyl acid phosphate was added as a phosphorus compound to the flask, and the mixture in the flask was heated at 120° C. for 5 hours to obtain polycarbonate diol. Table 1 shows the analysis results of the obtained polycarbonate diol. This polycarbonate diol is abbreviated as PC-1. The obtained polycarbonate diol has a repeatin...

Embodiment 2

[0147] 310g (3.4mol) of dimethyl carbonate, 500g (4.8mol) of 1,5-pentanediol, 490g (4.2mol) of ) 1,6-hexanediol. 0.2 g of tetrabutyl titanate was added as a catalyst to the aforementioned flask, and the mixture in the aforementioned flask was stirred and heated under normal pressure. After distilling off the mixture of produced methanol and dimethyl carbonate, the reaction temperature was set at 160° C. to react for 2 hours, and then the reaction temperature was increased to 190° C. to further react for 12 hours. Thereafter, the pressure in the flask was reduced to 12 kPa, and the reaction was further performed at 195° C. for 5 hours while distilling off diol and dimethyl carbonate. Thereafter, 0.22 g of 2-ethylhexyl acid phosphate was added as a phosphorus compound to the flask, and the mixture in the flask was heated at 120° C. for 5 hours to obtain polycarbonate diol. Table 1 shows the analysis results of the obtained polycarbonate diol. This polycarbonate diol is abbrev...

Embodiment 3

[0149] In a 2L glass flask equipped with a rectification column filled with a regular packing and a stirring device, put 350g (3.9mol) of dimethyl carbonate, 500g (4.8mol) of 1,5-pentanediol, 490g (4.2mol) ) 1,6-hexanediol. 0.2 g of tetrabutyl titanate was added as a catalyst to the aforementioned flask, and the mixture in the aforementioned flask was stirred and heated under normal pressure. After distilling off the mixture of produced methanol and dimethyl carbonate, the reaction temperature was set at 150° C. to react for 3 hours, and then the reaction temperature was increased to 190° C. to further react for 12 hours. Thereafter, the pressure in the flask was reduced to 12 kPa, and the reaction was further performed at 195° C. for 5 hours while distilling off diol and dimethyl carbonate. Thereafter, 0.22 g of 2-ethylhexyl acid phosphate was added as a phosphorus compound to the flask, and the mixture in the flask was heated at 120° C. for 5 hours to obtain polycarbonate d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This polycarbonate diol comprises repeating units represented by formula (A) and terminal hydroxyl groups. If the integrated value of signals at 3.90 to 4.45 ppm is 1,000 in H1-NMR measured using deuterated chloroform as the solvent and tetramethylsilane as the standard substance, the integrated value at 3.33 to 3.43 ppm is 0.1 to 10.0. (In formula (A), R is a C3-15 divalent aliphatic or alicyclic hydrocarbon, and one or more types can be selected for all repeating units.)

Description

technical field [0001] This invention relates to polycarbonate diols. Background technique [0002] Polycarbonate diols are known as soft segments such as polyurethanes and thermoplastic elastomers as raw materials excellent in hydrolysis resistance, light resistance, oxidative degradation resistance, heat resistance, and the like. However, when polycarbonate diol is used in a coating composition, a high viscosity and a large amount of solvent are required. Furthermore, since polycarbonate diol has strong intermolecular interactions, there is a problem that the dispersion stability of additives such as pigments is poor. [0003] In order to solve such disadvantages, various liquid polycarbonate diols have been disclosed. For example, polycarbonate diols for paints having excellent compatibility, low viscosity, and solubility in poor solvents are disclosed (for example, refer to Patent Document 1). In addition, a low-viscosity polycarbonate / polyether block copolymer is dis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/02C08G18/10C08G18/44C09D175/04
CPCC08G18/10C08G18/44C08G64/02C09D175/04
Inventor 上野英三郎
Owner ASAHI KASEI KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com