Polycyclic carbonate resin, preparation method thereof at normal pressure and application thereof

A carbonate resin and multi-ring technology, applied in the field of multi-ring carbonate resin and its preparation under normal pressure, can solve the problems of rising production cost, high equipment requirements, poor coating film performance, etc., avoiding high temperature and high pressure and equipment requirements. Low, short response time effect

Active Publication Date: 2017-09-22
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this prior art needs to react under high temperature and high pressure, which requires high equipment, increased production cost, and lower operational safety, and only two five-membered ring carbonate groups are arranged at the chain end in the product. The reactivity of ester groups is much lower than that of primary amines, and when cured with polyamines with a number of primary amines less than 3, linear polymers are often obtained, which are poorer than cross-linked coatings.

Method used

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  • Polycyclic carbonate resin, preparation method thereof at normal pressure and application thereof
  • Polycyclic carbonate resin, preparation method thereof at normal pressure and application thereof
  • Polycyclic carbonate resin, preparation method thereof at normal pressure and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) prepare chlorohydrin resin:

[0038] formula:

[0039] Table 1a

[0040]

[0041] Preparation method: Add metered phthalic anhydride, polyol pentaerythritol and solvent butyl acetate into a four-neck flask equipped with a thermometer, condenser, stirring paddle and constant pressure funnel, raise the temperature to 110°C, keep it warm for 4 hours, add catalyst tetrabutyl bromide ammonium chloride and start to add epichlorohydrin dropwise, keep warm for 6 hours, after the acid value of the resin is less than 15mgKOH / g, remove the solvent and then cool down and discharge the material.

[0042] Chlorohydrin resin properties: colorless transparent liquid; acid value: 10.78mgKOH / g; solid content: 85.77%, viscosity: 8600mPa·s.

[0043] (2) Preparation of polycyclic carbonate resin resin

[0044] formula:

[0045] Table 1b

[0046]

[0047] Preparation method: In a four-necked flask equipped with a thermometer and a stirring paddle, add metered amounts of the ab...

Embodiment 2

[0058] (1) prepare chlorohydrin resin:

[0059] formula:

[0060] Table 2a

[0061]

[0062] Preparation method: Add metered pyromellitic anhydride, glycol 1,4-butanediol and solvent dimethylformamide into a four-neck flask equipped with a thermometer, a condenser tube, a stirring paddle and a constant pressure funnel, and rise to 90°C, keep warm for 5h, add catalyst tetraethylammonium bromide and start to add epichlorohydrin dropwise, keep warm for 7h, after the acid value of the resin is less than 15mgKOH / g, remove the solvent and then cool down and discharge.

[0063] Chlorohydrin resin properties: orange-yellow transparent liquid; acid value: 13.08mgKOH / g; solid content: 76.88%, viscosity: 1596mPa·s;

[0064] (2) Preparation of polycyclic carbonate resin resin

[0065] formula:

[0066] Table 2b

[0067]

[0068] Preparation method: In a four-necked flask equipped with a thermometer and a stirring paddle, add metered amounts of the above-mentioned synthesized ch...

Embodiment 3

[0071] (1) prepare chlorohydrin resin:

[0072] formula:

[0073] Table 3a

[0074]

[0075] Preparation method: add measured amounts of trimellitic anhydride, polyol pentaerythritol and solvent dimethylformamide into a four-neck flask equipped with a thermometer, condenser, stirring paddle and constant pressure funnel, raise the temperature to 100°C, keep it warm for 5 hours, add catalyst tetrabutyl Base ammonium bromide and start to drop epichlorohydrin, keep it warm for 8 hours, after the acid value of the resin is less than 15mgKOH / g, remove the solvent and then cool down and discharge.

[0076] Chlorohydrin resin properties: wine red transparent liquid; acid value: 11.58mgKOH / g; solid content: 60.80%, viscosity: 622mPa s;

[0077] (2) Preparation of polycyclic carbonate resin resin

[0078] formula:

[0079] Table 3b

[0080]

[0081] Preparation method: In a four-neck flask equipped with a thermometer and a stirring paddle, add the metered amount of the above-...

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Abstract

The invention discloses polycyclic carbonate resin, a preparation method thereof at normal pressure and application thereof. The preparation method includes: using anhydride, polyol and epichlorohydrin as raw materials to synthesize chlorohydrin resin; further enabling the chlorohydrin resin and hydrogen carbonate to synthesize the polycyclic carbonate resin in an atmosphere with a catalyst and CO2. High temperature and high pressure are not needed for preparation of the polycyclic carbonate resin, and reaction can be realized at the normal pressure, so that process and equipment are simple, reaction time is short, and the raw materials are easy to get. The polycyclic carbonate resin prepared by the method is low in volatility and basically nontoxic and has high biodegradability. Mechanical performance and chemical medium resistance of non-isocyanate polyurethane synthesized by the polycyclic carbonate resin and polyamine are improved greatly, and medium permeability resistance is lowered greatly; the synthesis process is unaffected by moisture, and the polycyclic carbonate resin is expected to become a good-performance environment-friendly material to replace conventional polyurethane.

Description

technical field [0001] The invention relates to a polycyclic carbonate resin, in particular to a polycyclic carbonate resin and its preparation method and application under normal pressure. Background technique [0002] Polyurethane is a kind of synthetic polymer material that has great application value in the fields of plastics, rubber, foam, fiber, coating, adhesive and functional polymer, and has become an indispensable chemical material in human life. Traditional polyurethane materials are usually polymerized by polyol and isocyanate, and isocyanate is a highly toxic substance that is very harmful to the human body, which is not in line with the development direction of safety and environmental protection. Moreover, isocyanate is sensitive to moisture in the environment and can react with water to generate carbon dioxide. Bubbles stay in the film or form defects on the surface, resulting in reduced bubbles and sealing properties of the coating, which affects the chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/32C08G64/06C08G71/04C09D175/04
Inventor 瞿金清王彩陈荣华
Owner SOUTH CHINA UNIV OF TECH
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