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Fire-retarded material of polypentaerythritol kind phosphate ester melamine salt expended type and its preparation process

A technology of phosphate melamine salt and phosphate melamine, which is applied in the field of flame retardant materials, can solve problems such as unsatisfactory and oxygen index retention, and achieve the effects of good moisture resistance, small amount of addition, and cheap raw materials

Inactive Publication Date: 2005-06-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (6) The first issue of "Flame Retardant Materials and Technology" in 2004 "Microencapsulation and Flame Retardant Application of Ammonium Polyphosphate" introduced melamine-formaldehyde-wrapped ammonium polyphosphate, but because it uses ammonium polyphosphate as a flame retardant Although the material has achieved certain effects, its oxygen index stays at the level of 30%, which cannot meet the needs of related fields

Method used

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  • Fire-retarded material of polypentaerythritol kind phosphate ester melamine salt expended type and its preparation process
  • Fire-retarded material of polypentaerythritol kind phosphate ester melamine salt expended type and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Add 190g of pentaerythritol, 25g of water, and 100g of phosphorus pentoxide into a three-necked flask, place it in an oil bath at 75°C, and stir vigorously for 6 hours; add 126g of melamine, and perform homogenization under rapid stirring. Then put it into a muffle furnace for reaction at a temperature of 250° C., keep it warm for 45 minutes, take it out, and crush it.

[0062] After the polypropylene is plasticized on a two-roller plastic mixer, add 20% flame retardant, knead at 160°C for 10 minutes to make it evenly mixed, and hydraulically form it on a hot press at 185°C. The oxygen index of flame-retardant polypropylene was measured according to GB / T 2406-93, and the test result showed that the oxygen index was 23.

Embodiment 2

[0064] Add 180g of dipentaerythritol, 50g of water, and 100g of phosphorus pentoxide into a three-neck flask, place in an oil bath at 90°C, and stir vigorously for 4 hours; add 126g of melamine, and perform homogenization under rapid stirring. Then put it into a muffle furnace for reaction at a temperature of 250° C., keep it warm for 45 minutes, take it out, and crush it. According to the method of Example 1, the ratio of polypropylene to the dipentaerythritol-based phosphate melamine salt flame retardant obtained above was 75:25, and a flame-retardant polypropylene sample was prepared, and its flame-retardant performance was measured. The test result showed that the oxygen index was 29. According to UL94-1996, the horizontal and vertical flame retardant performance of flame retardant polypropylene is measured, the vertical combustion performance reaches 94V-0 level, and the horizontal combustion performance is HB.

Embodiment 3

[0066] 100 grams of melamine, 250 grams of formaldehyde (36%) are added successively in the round bottom flask that reflux condenser is housed, then add the water of 400 grams, adjust the pH value of solution with 20% sodium hydroxide solution to be about 9, Then the temperature was raised to 80°C, and after the solution became clear, the temperature was continued for 15 minutes to obtain a melamine-formaldehyde polymer.

[0067] In a three-necked flask equipped with a reflux condenser and vigorously stirred, add a certain amount of toluene, then add 500 grams of dipentaerythritol phosphate melamine salts obtained by the above reaction (prepared according to Example 2 and pulverized to more than 500 orders) ) and 40 grams of styrene-maleic anhydride copolymer resin, stirred vigorously at a speed of 3000r / min for 15min, then heated up to 60-70°C, added 500 grams of melamine-formaldehyde prepolymer, and stirred at a speed of 1000r / min After 2h, cool slowly at room temperature. ...

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Abstract

An expansion-type fire-retarding material is prepared from organic solvent, pentaerythritol kind phosphate melamine, styrene-maleic acid anhydride copolymer resin, benzoyl peroxide, and the bag material which is the melamine-formaldehyde polymer or the resultant of reaction between maleic acid anhydride and phthalic acid anhydride. Its advantages are high performance, high compatibility to polyolefin, and no poison and corrosion.

Description

technical field [0001] The invention relates to a flame-retardant material, in particular to a phosphorus-nitrogen series intumescent flame-retardant material, in particular to a microencapsulated polypentaerythritol-type phosphoric acid ester melamine salt intumescent flame-retardant material and a preparation method thereof. Background technique [0002] Phosphorus-nitrogen intumescent flame retardant material (IFR) is mainly composed of phosphorus and nitrogen, and does not contain halogen. It is a new type of flame retardant material developed on the basis of being used as a flame retardant coating. When the IFR-containing high-polymer material is heated and burned, a layer of carbon foam layer is formed on the surface, which can insulate heat, oxygen, smoke, and prevent droplet behavior. It has good resistance to repeated exposure to flames for a long time sex. IFR is a very promising new flame retardant, which has been paid more and more attention by people. [0003]...

Claims

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Application Information

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IPC IPC(8): C08K5/52C09K21/14
Inventor 吴荣梁王幸宜王雪峰
Owner EAST CHINA UNIV OF SCI & TECH
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