A polymethacrylimide foam with low smoke, low toxicity and high flame retardancy

A polymethacrylimide, high flame retardant technology, used in the field of foam material preparation, can solve the problems of reduced strength, poor temperature resistance, high toxicity and other problems of PMI foam materials, and achieves excellent mechanical properties and low smoke. Density and smoke toxicity, excellent flame retardant properties

Active Publication Date: 2021-11-30
HUNAN BOOM NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The PMI foam material itself is flammable, so it is of great significance to promote the development of flame-retardant PMI foam materials. A lot of research and development work has been done on the flame-retardant of PMI foam materials at home and abroad. However, the flame-retardant effect of PMI flame-retardant products on the market is not It is not very ideal, and the addition of halogen-containing flame retardants will cause the foam material to release highly toxic smoke when burning; adding phosphorus-containing flame retardants will significantly reduce the strength of PMI foam materials due to plasticization, and the temperature resistance Sexual deterioration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Take 7 parts of ammonium polyphosphate coated with PEI polymer film, soak in 12 parts of diphenylmethyl phosphonate for 24 hours, and then mix 6 parts of polymethyl methacrylate and 6 parts of iron acetoacetate, total 31 parts of flame retardant system, with 50 parts of methacrylic acid, 45 parts of methacrylonitrile, 0.5 parts of itaconic acid, 1.5 parts of isopropanol, 2.5 parts of tert-butanol, 2 parts of formamide, 0.05 parts of diphenyl peroxide Add formyl, 0.05 parts of azobisisobutyronitrile, 0.08 parts of tert-butyl peroxide 2-ethylhexanoate, 0.04 parts of tert-butyl peroxybenzoate, and 0.1 parts of magnesium methacrylate into a 3L three-necked glass flask , stirred at room temperature for 0.5h to dissolve evenly. The above solution was transferred into a closed system formed by 2 glass plates and a sealed frame. In the prepolymerization stage, polymerize in a water bath at 30°C for 144 hours, and then polymerize in a water bath at 45°C for 24 hours. The post-...

Embodiment 2

[0089] Hot soak red phosphorus in methacrylic acid for 6 hours at a temperature of 50°C to obtain passivated red phosphorus, prepare 5 parts of passivated red phosphorus, soak in organic phosphorus liquid flame retardant for 24 hours, and the organic phosphorus liquid flame retardant The agent is composed of 5 parts of dimethyl methanephosphonate, 6 parts of diphenylmethyl phosphonate, and then 5 parts of polymethyl methacrylate and 5 parts of iron acetoacetate, a total of 26 parts of flame retardant system and 50 parts Parts of methacrylic acid, 40 parts of acrylonitrile, 0.5 parts of itaconic acid, 1 part of isopropanol, 2 parts of amyl alcohol, 3 parts of formamide, 0.05 parts of lauryl peroxide, 0.05 parts of azobisisobutyronitrile, Add 0.08 parts of tert-butyl 2-ethylhexanoate, 0.06 parts of di-tert-butyl peroxide, and 0.1 parts of allyl methacrylate into a 3L three-necked glass flask in sequence, and stir at room temperature for 0.5 hours to dissolve evenly. The above so...

Embodiment 3

[0092] Hot dip ammonium polyphosphate in methacrylic acid for 6 hours at a temperature of 50°C to obtain passivated ammonium polyphosphate, prepare 7 parts of passivated ammonium polyphosphate, soak in 12 parts of diphenylmethyl phosphonate, and then Take 6 parts of polymethyl methacrylate and 6 parts of iron acetoacetate, a total of 31 parts of flame retardant system, with 50 parts of methacrylic acid, 45 parts of methacrylonitrile, 0.5 parts of itaconic acid, 1.5 parts of isopropanol, 2.5 parts of tert-butanol, 2 parts of formamide, 0.05 parts of dibenzoyl peroxide, 0.05 parts of azobisisobutyronitrile, 0.08 parts of tert-butyl peroxy 2-ethylhexanoate, 0.04 parts of tert-benzoyl peroxide Butyl ester and 0.1 part of magnesium methacrylate were sequentially added into a 3L three-necked glass flask, and stirred at room temperature for 0.5h to dissolve evenly. The above solution was transferred into a closed system formed by 2 glass plates and a sealed frame. In the prepolymeri...

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PUM

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Abstract

The invention discloses a polymethacrylimide (PMI) foam material with low smoke, low toxicity and high flame retardancy. body, flame retardant system, foaming agent, nucleating agent, initiator and crosslinking agent are mixed to obtain a mixed solution, which is obtained by polymerization and foaming. The mass fraction of the flame retardant system in the mixed solution is 10wt ~40wt%, the present invention finally obtains excellent mechanical properties and excellent flame retardant properties by adding a flame retardant system to the molding raw materials of the PMI foam material, which can be extinguished immediately (within 2s), and has a Very low smoke density and smoke toxicity, it is a low smoke, low toxicity and high flame retardant PMI foam material.

Description

technical field [0001] The invention relates to a polymethacrylimide (PMI) foam material with low smoke, low toxicity and high flame retardancy, belonging to the technical field of foam material preparation. Background technique [0002] With the development of technology, composite materials based on organic polymer materials have been widely used in aerospace, wind power equipment, automobile manufacturing, rail transit and other fields. The vast majority of organic polymer materials are flammable, and when burned, they generate large amounts of heat, high temperature, fast burning speed, and are prone to produce a large amount of toxic smoke. Once a fire breaks out, it will bring great difficulties to fire rescue work, often causing a large number of casualties and property losses. Therefore, in order to ensure the safety of people's lives and property, Flame retardancy of materials is very important. [0003] Polymethacrylimide (PMI) foam material was first developed b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/46C08F222/02C08F220/40C08F2/44C08K9/10C08K3/32C08K3/02C08K5/5333C08L33/02C08L33/12C08J9/14
CPCC08F2/44C08F220/06C08J9/0038C08J9/0061C08J9/0066C08J9/142C08J2203/12C08J2333/02C08J2433/12C08K3/02C08K3/32C08K5/5333C08K9/10C08K2003/026C08K2003/323C08F220/46C08F222/02C08F220/40
Inventor 黄小忠鲁先孝陈贵夫刘鹏
Owner HUNAN BOOM NEW MATERIALS
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