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Method for preparing aminosilane coupling agent modifying ammonium polyphosphate

An aminosilane coupling agent, ammonium polyphosphate technology, applied in dyeing organosilicon compound processing, textile and papermaking, fiber processing and other directions, can solve the problems of unreported patents, ammonium phosphate reducing water solubility, etc., to improve flame retardant Efficiency, good modification effect and simple modification method

Inactive Publication Date: 2008-08-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of aminosilane coupling agent to modify ammonium polyphosphate to reduce water solubility research and patents has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 100g of aminosilane coupling agent with 100g of deionized water, stir at 30°C for 90min to completely hydrolyze the coupling agent, and obtain hydrolyzed coupling agent A. Disperse 2500g of ammonium polyphosphate in 4900g of inert solvent, add 100g of hydrolytic coupling agent A at 30°C, react for 1.5h, filter, and dry at 90°C for 24h to obtain a water solubility of 0.545 g / 100g H 2 O (25°C) modified ammonium polyphosphate A with a pH of 8.09.

Embodiment 2

[0021] Mix 33g of aminosilane coupling agent with 167g of deionized water and stir at 40°C for 60 minutes to completely hydrolyze the coupling agent to obtain hydrolyzed coupling agent B. Disperse 800g of ammonium polyphosphate in 1504g of an inert solvent, add 96g of hydrolysis coupling agent B at 40°C, react for 1h, filter, and dry at 100°C for 24h to obtain a water solubility of 0.650g / 100g H 2 O (25°C) modified ammonium polyphosphate B, pH 8.94.

Embodiment 3

[0023] Mix 25g of aminosilane coupling agent with 175g of deionized water and stir at 50°C for 30 minutes to completely hydrolyze the coupling agent to obtain hydrolyzed coupling agent C. Disperse 600g of ammonium polyphosphate in 1104g of an inert solvent, add 96g of hydrolysis coupling agent C at 50°C, react for 1h, filter, and dry at 110°C for 24h to obtain a water solubility of 0.434g / 100g H 2 O (25°C) modified ammonium polyphosphate C with a pH of 8.16.

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Abstract

The invention discloses a preparation process of modifying ammonium polyphosphate with amino silane coupling agent, relating to the flame-retardant technology in chemical field. The invention provides a surface organic modified technology which can significantly reduce the water-solubility of ammonium polyphosphate, increases the compatibility of ammonium polyphosphate expansion flame-proof macromolecule material and the flame-proof efficiency, aiming to the problems existing the current ammonium polyphosphate flame-retardant that the current ammonium polyphosphate flame-retardant has higher dissolvability in water, and serious mechanical loss after applied on flame-proof plastic. The invention is conducted through two steps that firstly mixing amino silane coupling agent with deionized water according to weight ratio to hydrolyze, and secondly conducting surface organic modifying processing for ammonium polyphosphate (II type) with hydrolyzed amino silane coupling agent, which makes the dissolvability of II type ammonium polyphosphate in water be reduced to 0.43g / 100mL H2O from 1.101g / 100mL H2O, and respectively increases elongation at break and tension strength by 39.4% and 8.0% through applying modified ammonium polyphosphate on expansion flame-proof polypropylene. The modified ammonium polyphosphate can be extensively applied on the expansion flame-proof of polyolefins plastic, textile, lumber, paper and painting.

Description

technical field [0001] The aminosilane coupling agent-modified ammonium polyphosphate of the invention relates to flame retardant technology in the chemical industry. The modified ammonium polyphosphate can be widely used in the expansion and flame retardancy of polyolefin plastics, fabrics, wood, paper and coatings. Background technique [0002] Ammonium polyphosphate is an inorganic polymer flame retardant with high phosphorus and nitrogen content. It can be compounded with polyhydroxy compounds to form a halogen-free and environmentally friendly compound intumescent flame retardant, which has the advantages of high-efficiency flame retardancy, anti-melt dripping, and low smoke. It is one of the most widely used flame retardants in intumescent flame retardant materials. At present, the ammonium polyphosphate used as a flame retardant still has the problems of high solubility in water, poor compatibility with polymer substrates, and insufficient thermal stability, which l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/12C09K21/04C08K9/06D06M11/71D21H21/34C09D5/18
Inventor 郝建薇刘国胜杜建新杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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