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Silicon phosphonate containing fire rotardant and its synthesis method

A technology of silicon phosphonate and synthesis method, which is applied in textiles, papermaking, fiber treatment, etc., and can solve problems such as hard hand feeling, large loss of fabric strength, environmental and human health hazards, etc.

Active Publication Date: 2004-12-22
ZHEJIANG HENGYI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although MDPPA and THPC have good permanent flame-retardant effects as fabrics, there are still some problems: the biggest disadvantage of MDPPA is that the fabric loses a lot of strength and feels hard; the disadvantage of THPC is that its intermediate product is PH 3 , and there may be carcinogenic bischloromethyl ether in THPC, so its production and use will cause serious harm to the environment and human health

Method used

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  • Silicon phosphonate containing fire rotardant and its synthesis method
  • Silicon phosphonate containing fire rotardant and its synthesis method
  • Silicon phosphonate containing fire rotardant and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Take 68.5g of methyl vinyl dichlorosilane in a 500ml round bottom flask, add 200ml of dichloroethane and stir well. Then 60.5 g of dimethyl phosphite and 3 g of pyridine were added as catalysts. Stir at 50°C for 24 hours under nitrogen protection. Then the temperature was raised to 90°C and refluxed for 4 hours, and the fraction at 150-155°C and -0.099mPa was collected by molecular distillation, and 20 g of distilled water was slowly added dropwise to the fraction to react, and then the temperature was raised to 75°C to continue the reaction for 4 hours. After cooling down to room temperature, 200ml of distilled water was added into the reaction system, and the phases were separated after fully stirring. The distilled water phase obtained a light yellow viscous liquid with a yield of 82%. The analysis test results are as follows:

[0017] Fourier infrared: 3440cm -1 、2968cm -1 、1633cm -1 、1271cm -1 、1122cm -1 、1036cm -1 、779cm -1 characteristic peaks...

Embodiment 2

[0019] Embodiment 2: other is the same as embodiment 1, uses triethylamine instead to make catalyst, yield 70%.

Embodiment 3

[0020] Embodiment 3: other are the same as embodiment 1, change dimethyl phosphite add-on to be 120.0g (1.0mol) and 3g aluminum chloride to make catalyst, dichloroethane consumption is 250ml, yield 87%.

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Abstract

A Si-contained phosphonate as fire retarding agent used for fabrics is prepared through proportionally mixing methylvinyl dichlorosilane with solvent, stirring, adding dimethyl phosphite and catalyst, stirring under protection of N2, heating, reflux, collecting fraction, cooling, adding water, stirring, oil-water separating, and distilling water phase to obtain fire retarding agent SP.

Description

technical field [0001] The invention belongs to the field of flame retardant synthesis. Specifically, it is a silicon-containing phosphonate flame retardant and a synthesis method thereof. Background technique [0002] In permanent flame retardant finishing agents for cellulose fabrics, although halogen-containing flame retardants have better flame retardant effects, they are gradually replaced by halogen-free flame retardants due to secondary pollution problems during use and combustion. substitute. At present, organophosphorus flame retardants are widely used, among which N-hydroxymethyl-3-(dimethoxyphosphonic acid) acrylic acid (abbreviated MDPPA) and tetrahydroxymethyl phosphorus chloride (abbreviated THPC) The most widely used. Although MDPPA and THPC have good permanent flame-retardant effects as fabrics, there are still some problems: the biggest disadvantage of MDPPA is that the fabric loses a lot of strength and feels hard; the disadvantage of THPC is that its in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/50
Inventor 彭治汉江建明崔艳霞刘丽雅朱明娟
Owner ZHEJIANG HENGYI GRP CO LTD
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