Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of side chain chlorine-containing polypropylene carbonate polyol

A technology of polypropylene carbonate and polyols, which is applied in the field of preparation of polypropylene carbonate polyols, can solve the problems of poor solvent resistance, flame retardancy, and poor bonding strength of polyurethane, and achieve Excellent solvent resistance, avoid wall hanging on the top of the kettle, and high bonding strength

Active Publication Date: 2018-04-06
GUANGDONG UNIV OF TECH
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After research, it was found that although the polypropylene carbonate polyol prepared by the above-mentioned patent contains a large amount of carbonate bonds, a large amount of carbon dioxide is generated when burned, and it is easy to achieve flame retardancy. However, a certain amount of flame retardant still needs to be added in practical applications. , so the flame retardancy still needs to be improved
In addition, polyurethane products prepared from ordinary polypropylene carbonate polyols have poor solvent resistance and poor bonding strength, so they cannot be directly used as adhesives

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Open the carbon dioxide feed valve of the reactor, add carbon dioxide to the 6L reactor until the pressure in the reactor is 1.5 MPa, and close the carbon dioxide feed valve of the reactor. Open the propylene oxide metering pump, pour 2100g propylene oxide and 210g epichlorohydrin into the reactor; open the discharge valve of the initiator storage tank, and pour 100g dipropylene glycol into the reactor; the reactor is heated to 60 ℃, add carbon dioxide until the pressure in the reactor is 2.5MPa; put 100g of the liquid double metal cyanide catalyst prepared according to Example 1 of CN103865052A into the reactor, react at a constant temperature for 30h, and remove unreacted rings under vacuum at 0.1Pa-1KPa. Propylene oxide and epichlorohydrin, obtain 3751g side chain chlorine-containing polypropylene carbonate polyols, product molecular weight is 2480, hydroxyl value 45.1, chlorine element content 2.0%.

Embodiment 2

[0025] Open the carbon dioxide feed valve of the reactor, add carbon dioxide into the 6L reactor until the pressure in the reactor is 1.0 MPa, and close the carbon dioxide feed valve of the reactor. Open the propylene oxide metering pump, put 1800g propylene oxide and 500g epichlorohydrin into the reactor; Ether 360g; heat the reactor to 60°C, add carbon dioxide until the pressure inside the reactor is 2.5MPa; put 50g of the liquid double metal cyanide catalyst prepared according to Example 1 of CN103865052A into the reactor, react at constant temperature for 30h, 0.1Pa-1KPa The unreacted propylene oxide and epichlorohydrin were removed under vacuum to obtain 3850 g of side chain chlorine-containing polypropylene carbonate polyol, the product molecular weight was 3020, the hydroxyl value was 37, and the chlorine element content was 0.42%.

Embodiment 3

[0027] Open the carbon dioxide feed valve of the reactor, add carbon dioxide to the 6L reactor until the pressure in the reactor is 1.5 MPa, and close the carbon dioxide feed valve of the reactor. Open the propylene oxide metering pump, pour 1200g propylene oxide and 1200g epichlorohydrin into the reactor; open the discharge valve of the initiator storage tank, and pour 50g dipropylene glycol into the reactor; the reactor is heated to 60 ℃, add carbon dioxide until the pressure in the reactor is 2.0MPa; put 200g of liquid double metal cyanide catalyst prepared according to CN103865052A Example 1 into the reactor, react at constant temperature for 20h, and remove unreacted epoxy under 0.1Pa-1KPa vacuum Propane and epichlorohydrin obtain 3800g side chain chlorine-containing polypropylene carbonate polyols, the product molecular weight is 2040, the hydroxyl value is 54.9, and the chlorine element content is 11.5%.

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 provides a preparation method of poly(propylidene carbonate)polyol including chlorine on a side chain. The preparation method comprises the following steps of adding carbon dioxide into a reaction kettle, after the pressure in the reaction kettle reaches 0.5MPa to 5.0MPa, adding epoxy propane, epoxy chloropropane and an initiator into the reaction kettle, after the temperature in the reaction kettle rises to 40 DEG to 150 DEG, continuously adding the carbon dioxide until the pressure in the reaction kettle reaches 1.0MPa to 10MPa, subsequently adding a liquid bimetal cyanide catalyst, enabling an obtained mixture to react for 0.5h to 100h at a constant temperature, and removing the epoxy propane and the epoxy chloropropane, which do not react, under the vacuum of 0.1Pa to 1KPa, to obtain the poly(propylidene carbonate)polyol including the chlorine on the side chain. The poly(propylidene carbonate)polyol prepared by the preparation method has better flame resistance, and polyurethane prepared from the poly(propylidene carbonate)polyol including the chlorine on the side chain has better bonding strength and solvent resistance.

Description

technical field [0001] The present invention relates to a kind of preparation method of polypropylene carbonate polyol, particularly relate to a kind of preparation method of side chain chlorine-containing polypropylene carbonate polyol. Background technique [0002] Polypropylene carbonate polyol is a new type of polycarbonate polyol, which can be prepared by copolymerization of carbon dioxide and propylene oxide under the catalysis of a catalyst, using small molecule polyol as an initiator. The polyol molecule contains a relatively high concentration of carbonate groups and ether groups, and has the hydrolysis resistance of polyether and the high strength of aliphatic polycarbonate. Waterborne polyurethane raw materials. [0003] There are many studies on the preparation of polycarbonate polyols by direct copolymerization of carbon dioxide and propylene oxide, and the relevant studies are mostly prepared by double metal cyanide catalysts, such as US4500704, US1747983A, CN...

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): C08G64/34
CPCC08G64/34
Inventor 李悌永刘保华陈伟彬李芳牛艳丽
Owner GUANGDONG UNIV OF TECH