Polycarbonate polyols, and preparation method and applications thereof

A polycarbonate and polyol technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of reduced chemical resistance of finished products, poor mechanical properties, too soft polyurethane film, etc. The effect of good mechanical properties and excellent mechanical strength

Active Publication Date: 2017-10-13
ETERNAL CHEM (CHINA) CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, TW I567104 B provides that the water content of polycarbonate polyol can be adjusted to achieve the required transparency of polyurethane, but it will cause the molecular weight of polyurethane to fail to increase, thereby reducing the chemical resistance of the finished product; JP2631507 B2 provides the use of polycarbonate polyol and Although hydrophilic polyether forms block copolymer can increase its transparency, because the

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 polyols, and preparation method and applications thereof
  • Polycarbonate polyols, and preparation method and applications thereof
  • Polycarbonate polyols, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Firstly, the four-neck reaction flask was connected to the condensing device and set up, and the air-nitrogen replacement was performed back and forth three times. At this time, the nitrogen gas was turned on, and 1 mole (118 g) of 1,6-hexanediol was added into the reactor, the temperature of the reactor was raised to 100° C., and water was removed under vacuum for 1 hour. Afterwards, fill up nitrogen again, lower the temperature to 60°C, add a small amount of catalyst sodium hydride and 1.285 moles (115.6 grams) of dimethyl carbonate into the reactor and mix evenly, adjust the reaction temperature to 80°C, and the temperature at the top of the tower can be observed to rise to 60-64°C, and remove methanol and dimethyl carbonate, and record the amount of liquid removed.

[0103] Then slowly increase the reaction temperature until 190°C, set up a vacuum system device, and depressurize to 20mmHg; then check the viscosity and hydroxyl value every hour until the hydroxyl val...

Embodiment 2

[0106] First, the reactor was set up, and the air-nitrogen replacement was performed back and forth three times. At this time, the nitrogen gas was turned on, and 1 mole (104 g) of 1,5-pentanediol was added into the reactor, and the temperature of the reactor was raised to 100° C., and water was removed under vacuum for 1 hour. Afterwards, fill up with nitrogen again, lower the temperature to 60°C, add a small amount of catalyst sodium hydride and 1.294 moles (116.46 grams) of dimethyl carbonate into the reactor and mix evenly, adjust the reaction temperature to 80°C, and the temperature at the top of the tower can be observed to rise to 60-64°C, and remove methanol and dimethyl carbonate, and record the amount of liquid removed.

[0107] Then slowly increase the reaction temperature until it reaches 190°C, put a vacuum system on it, and reduce the pressure to 20mmHg; then check the viscosity and hydroxyl value every hour until the hydroxyl value shows that the obtained polyca...

Embodiment 3

[0110] First, the reactor was set up, and the air-nitrogen replacement was performed back and forth three times. At this time, the nitrogen gas was turned on, and 1.5 moles (135 grams) of 1,4-butanediol was added into the reactor, and the temperature of the reactor was raised to 100° C., and water was removed under vacuum for 1 hour. Afterwards, fill up nitrogen again, lower the temperature to 60°C, add a small amount of catalyst sodium hydride and 1.955 moles (175.99 grams) of dimethyl carbonate into the reactor and mix evenly, adjust the reaction temperature to 80°C, and the temperature at the top of the tower can be observed to rise to 60°C, remove methanol and dimethyl carbonate, and record the amount of removed liquid.

[0111] Then slowly increase the reaction temperature until it reaches 190°C, put a vacuum system on it, and reduce the pressure to 20mmHg; then check the viscosity and hydroxyl value every hour until the hydroxyl value shows that the obtained polycarbonat...

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

The invention discloses polycarbonate polyols, and a preparation method and applications thereof. The polycarbonate polyols comprise repetitive units disclosed as Formula (A) and terminal groups, wherein R is C3-C15 bivalent aliphatic hydrocarbons; and 92-99.9% of the terminal groups are hydroxyls. In 1H-NMR of the polycarbonate polyols, when deuterated chloroform is used as a solvent and primary standard substance, the chemical shift of the deuterated chloroform signal is set at 7.26ppm; and when the 3.90-4.45ppm signal integral value is set at 1000, the 3.70-3.85ppm signal integral quantity is 0.1-10.

Description

technical field [0001] The present invention relates to polycarbonate polyol, which is suitable for thermoplastic polyurethane, waterborne polyurethane or reactive adhesive. The invention also relates to the preparation method and application of the polycarbonate polyol. Background technique [0002] Polyurethane (PU) is widely used in various industrial fields, such as elastomers, lenses, synthetic leather, coagulated powder, spandex, coatings, adhesives, sealing materials and foams. Polycarbonate polyols are generally used as soft segment raw materials in thermoplastic polyurethane, waterborne polyurethane or reactive adhesives. However, when crystalline polycarbonate polyol is used as the soft segment raw material, the appearance of the obtained polyurethane (such as thermoplastic polyurethane elastomer and water-based polyurethane film) is often opaque, which leads to limitations in application and cannot be applied to transparent appearance. For example, it cannot be ...

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
IPC IPC(8): C08G64/30C08G64/02C09D175/04C08L75/04C08G18/66C08G18/44C08G18/34C08G18/32
CPCC08G18/3206C08G18/3228C08G18/348C08G18/44C08G18/664C08G18/6659C08G64/0208C08G64/305C08J5/18C08J2375/04C08L75/04C08L2201/10C08L2203/16C08L2207/04C09D175/04
Inventor 蒋秉叡许彦琦
Owner ETERNAL CHEM (CHINA) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap