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

Organosilicone modified halogen-free intumescent flame retardant and preparation method thereof

An intumescent flame retardant and silicone technology, applied in the field of polymer material flame retardants, can solve problems such as limited market demand, achieve good synergistic flame retardant effect, lasting flame retardant performance, improve mechanical properties and processing. performance effect

Active Publication Date: 2014-08-20
ZHENJIANG JIANGNAN CHEM
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, first-class is mainly used in China to prepare low-grade products such as silane crosslinking agent, methyl silicone resin and waterproofing agent. However, due to the limited market demand, it is not enough to form a large-scale treatment of first-class. Therefore, the comprehensive utilization of first-class is becoming more and more serious. people's attention

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
  • Organosilicone modified halogen-free intumescent flame retardant and preparation method thereof
  • Organosilicone modified halogen-free intumescent flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 25.2g (0.2mol) of melamine (MEL) into a four-necked flask equipped with a stirrer, a thermometer, and a condenser. The upper end of the condenser is connected to a gas absorption device, and then add 150ml of cyclohexane. 29.9 g (0.2 mol) of methyltrichlorosilane was heated, and the temperature was controlled at 45°C to stir and react for 1 hour, the temperature was raised to 60°C to continue the reaction for 1 hour, the temperature was raised to 85°C, and the reaction was refluxed for 2 hours. Stop the reaction after detecting that no hydrogen chloride gas has been released with pH test paper. Hydrogen chloride gas released during the reaction is absorbed with lye. The cyclohexane is removed by distillation under reduced pressure, and the recovered cyclohexane can be recycled. After evaporating the solvent, add 150ml of distilled water, stir and heat to 70°C for 0.5h, cool, filter, and wash with distilled water several times until there is no chloride ion in the f...

Embodiment 2

[0030]76.7g (0.3mol) melamine cyanurate (MCA) is added in the reaction system with embodiment 1, then add 200ml methylene chloride, add 29.9g (0.2mol) methyltrichlorosilane after stirring, heat , control the temperature at 45°C to reflux, and stir for 3h. The released hydrogen chloride gas is absorbed with lye. The dichloromethane (which can be recovered and reused) was removed by heating and distillation, and the temperature was raised to 90° C. to continue the reaction for 1 h, until no hydrogen chloride gas was released to stop the reaction. Slightly cold, add 150ml distilled water to continue subsequent purification measures, same as Example 1. Dry to obtain white hydrophobic powder 77.4g, yield 90.8%. The hydrophobicity of the product is the same as in Example 1. Put it in a muffle furnace and burn it at 300°C for 30 minutes without losing weight.

Embodiment 3

[0032] 67.2g (0.3mol) melamine phosphate (MP) is added in the reaction system with embodiment 1, then add 180ml acetone, add 29.9g (0.2mol) methyl trichlorosilane after stirring, heating, control temperature is Stir and react at 45°C for 1.5h, heat up to 58°C and reflux for 1.5h, and distill under reduced pressure to remove acetone. Other processing steps are the same as in Example 1. Dry to obtain product 69.7g, yield 92%, the hydrophobicity of product is the same as embodiment 1. Put it into a muffle furnace and burn at 300° C. for 30 minutes, resulting in a weight loss of 5.4%, and the weight loss of the control sample without organosilicon treatment was 4.6%.

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 a preparation method for an organosilicone modified halogen-free intumescent flame retardant. The preparation method comprises the following steps of: adding methyl chlorosilane into a foaming agent and a charring agent which are used for synthesizing the intumescent flame retardant, performing polycondensation, and purifying to obtain the flame retardant. The methyl chlorosilane is taken as an organosilicone modifier, and is chemically reacted with the foaming agent and the charring agent which are commonly used for preparing the halogen-free intumescent flame retardant, so that the hydrophilic foaming agent and charring agent have good hydrophobicity, the compatibility of the flame retardant and a high polymer material is greatly enhanced, a phenomenon that the flame retardant is migrated and precipitated hardly happens, and the high polymer material into which the flame retardant is added has durable flame retardancy.

Description

technical field [0001] The invention relates to the technical field of polymer material flame retardants, in particular to a silicone-modified halogen-free intumescent flame retardant and a preparation method thereof. Background technique [0002] At present, synthetic polymer materials have been widely used in various fields of people's production and life, but most polymer materials are flammable, so the flame retardant research of polymer materials has become one of the research hotspots in the field of materials today. Adding flame retardants to polymer materials has been widely used because of its convenient use and good flame retardant effect. [0003] Traditional organohalogenated flame retardants, especially brominated flame retardants, are still widely used because of their excellent flame retardant effect. However, when halogen-containing flame retardants are burned at high temperatures, a large amount of toxic gases and smoke will be produced. According to stati...

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): C08G77/54C08L23/12C08L83/14
Inventor 王伟楼芳彪蒋志秋吴涛
Owner ZHENJIANG JIANGNAN CHEM