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Polyether polyol of polyurethane raw material with flame retardant function and preparation method thereof

A polyether polyol and polyurethane technology, applied in the field of polyurethane flame retardants, can solve problems such as cracking, loss of performance advantages, and decline in physical and mechanical properties, so as to improve flame retardant performance, avoid migration of flame retardant elements, and increase use conditions. and the effect of age

Active Publication Date: 2019-08-23
南京金栖化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of adding flame retardants often causes physical and mechanical properties such as foam collapse, cracking, pulverization, or rebounding to be greatly reduced, and loses its own performance advantages.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of polyurethane raw material polyether polyol with flame retardant function, the steps are as follows:

[0026] S1. Add nano-SiO2 to toluene, the mass volume ratio (g / mL) of nano-SiO2 to toluene is 1:24, 300W ultrasonic dispersion for 25min, add silane coupling agent, continue ultrasonication for 3min, nano-SiO2 and silane coupling agent The mass ratio is 1:3, transferred to the reactor, stirred and reacted at 70°C for 7h, the stirring reaction rate was 400r / min, centrifuged at 12000r / min, the precipitate was washed with absolute ethanol, dried, and the modified nano SiO 2 ;

[0027] S2. Add modified nano-SiO2 to toluene, the mass volume ratio (g / mL) of modified nano-SiO2 to toluene is 1:24, ultrasonically disperse for 3 minutes, add to polyether, stir and react at 75°C for 6 hours, The stirring reaction rate is 500r / min;

[0028] S3. Add a halogen compound to the reaction product in step S2, heat to 85° C., stir for 3 hours, and remove t...

Embodiment 2

[0031] A kind of preparation method of polyurethane raw material polyether polyol with flame retardant function, the steps are as follows:

[0032] S1. Add nano-SiO2 to toluene, the mass volume ratio (g / mL) of nano-SiO2 to toluene is 1:20, 300W ultrasonic dispersion for 25min, add silane coupling agent KH-550, continue ultrasonication for 4min, nano-SiO2 and silane The mass ratio of the coupling agent was 1:2, transferred to the reactor, stirred and reacted at 65°C for 8h, the stirring reaction rate was 450r / min, centrifuged at 13000r / min, the precipitate was washed with absolute ethanol and dried to obtain Modified nano-SiO2;

[0033] S2. Add modified nano-SiO2 to toluene, the mass volume ratio (g / mL) of modified nano-SiO2 to toluene is 1:25, ultrasonically disperse for 2 minutes, and add to polyether, the polyether is propylene oxide The polyether polyol formed by ring-opening polymerization was stirred and reacted at 70°C for 5 hours, and the stirring reaction rate was 600...

Embodiment 3

[0037] A kind of preparation method of polyurethane raw material polyether polyol with flame retardant function, the steps are as follows:

[0038] S1. Add nano-SiO2 to toluene, the mass volume ratio (g / mL) of nano-SiO2 to toluene is 1:25, 400W ultrasonic dispersion for 20min, add silane coupling agent KH-560, continue ultrasonication for 5min, nano-SiO2 and silane The mass ratio of the coupling agent was 1:1, transferred to the reactor, stirred and reacted at 65°C for 7h, the stirring reaction rate was 300r / min, centrifuged at 13000r / min, the precipitate was washed with absolute ethanol, dried to obtain Modified nano-SiO2;

[0039]S2. Add modified nano-SiO2 to toluene, the mass-volume ratio (g / mL) of modified nano-SiO2 to toluene is 1:20, ultrasonically disperse for 2 minutes, and add to polyether, the polyether is propylene oxide The polyether polyol formed by ring-opening copolymerization with ethylene oxide was stirred and reacted at 70°C for 4 hours, and the stirring rea...

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PUM

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Abstract

The invention discloses a polyurethane raw material polyether polyol having a flame-retardant function, and a preparation method thereof, and relates to the technical field of polyurethane flame retardant agents. The preparation steps comprise: adding nanometer SiO2 to toluene, carrying out ultrasonic dispersing for 20-30 min, adding a silane coupling agent, continuously carrying out ultrasonic treatment for 2-5 min, transferring into a reactor, carrying out a stirring reaction for 4-8 h at a temperature of 65-75 DEG C, carrying out centrifugation, washing the precipitate by using absolute ethanol, and drying to obtain modified nanometer SiO2; adding the modified nanometer SiO2 to toluene, carrying out ultrasonic dispersing for 2-5 min, adding to polyether, and carrying out a stirring reaction for 4-8 h at a temperature of 70-80 DEG C; and adding a halogen compound to the reaction product obtained in the step S2, heating to a temperature of 80-90 DEG C, carrying out a stirring reaction for 2-4 h, and removing the solvent toluene so as to obtain the modified polyether polyol. According to the present invention, one terminal of the polyether is grafted with the SiO2 treated with the coupling agent, and the other terminal is grafted with the halogen compound so as to obtain the modified polyether polyol; and with the application of the obtained modified polyether polyol as the reaction raw material to prepare the polyurethane foam, the flame retardant performance of the material can be substantially improved due to the synergistic effect of the flame retardant elements such as silicon and phosphorus.

Description

technical field [0001] The invention relates to the technical field of polyurethane flame retardants, in particular to a polyurethane raw material polyether polyol with flame retardant function and a preparation method thereof. Background technique [0002] Polyurethane (PU) foam is one of the most commonly used plastics at present. It is estimated that the global annual demand is about 5 million tons, most of which are polyurethane soft foam and hard foam. PU foam is extremely flammable in the air, and produces a lot of toxic gas and smoke when burned. Therefore, foreign countries have paid great attention to the flame retardancy of PU foam materials, and promulgated many regulations and standards on flame retardancy. In our country, although there are no regulations on the flame retardancy of PU foam, in fact, in recent years, the polyurethane foam used in aircraft, ships, railway vehicles, automobiles, other important industry parts, equipment and some places has been pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/338C08G18/50C08J9/14
Inventor 陈庆曾军堂陈兵
Owner 南京金栖化工集团有限公司