CN1978506A

CN1978506A - PAL material organic plastic flame-retarded nano composite material

Info

Publication number: CN1978506A
Application number: CN 200510127856
Authority: CN
Inventors: 曹发魁; 牟森; 徐贤伦; 孙鲲鹏
Original assignee: GANSU KAIXI ECOLOGICAL ENVIRONMENT ENGINEERING Co Ltd
Current assignee: GANSU KAIXI ECOLOGICAL ENVIRONMENT ENGINEERING Co Ltd
Priority date: 2005-12-06
Filing date: 2005-12-06
Publication date: 2007-06-13

Abstract

This invention discloses a nanometer complex material which was made by PAL and organic plastic polymer, and its preparation method. The inorganic and non-metallic PAL was treated with cation-exchanged action. The organic clay was obtained and was dispersed into the bulk polymers. After reacted with proper catalytic agents and chain-extended agents, the complex material was up to the grade of nanometer decentralization. The combination property of the complex material was increased in some degree and the capability of flame-retarded and heat resisting was also enhanced. The preparation method in this invention is simple, easily implemented and low cost.

Description

The PAL material organic plastic flame-retarded nano composite material

Technical field

A kind of PAL of containing material (its raw material is a polygorskite, through the ultramicronising purification processes, polygorskite purity＞90%, particle diameter＜8 μ) anti-flaming nano composite material and preparation method have been the present invention relates to.

Background technology

Organic plastics is a kind of widely used polymer materials, the most frequently used have polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), nylon (PA), a polycarbonate (Pc) etc., for improving flame retardant resistance, thermotolerance and the mechanical tenacity of organic plastics, in the plastics polymerization process, add the laminar silicic acid filler salt, silicon-containing compound is no matter be additive as polymkeric substance, or the blend with polymkeric substance is formed all has tangible fire retardation.

Summary of the invention

The used PAL material of the present invention is a layered silicate, can play iris action in polymkeric substance inside, can slow down and hinder the flammable small molecules that the polymer molecule chain degradation is produced in combustion processes moves to the burning circle, slow down extraneous oxygen simultaneously and permeate to material internal, thus retarded combustion.Be well dispersed in PAL material in the polymkeric substance with nanoscale, flame retardant properties just can obviously improve, and addition is controlled at 10%, uses with conventional flame retardant is collaborative, can produce good synergistic, finally forms the ternary dispersed texture of layered silicate.Add the nano composite material of PAL material, had the not available advantage of traditional flame-retardant system, can improve the mechanical property and the thermotolerance of organic plastics simultaneously.

The object of the present invention is to provide a kind of PAL of containing nano composite material, used PAL powder body material, its microcosmic crystal structure is formed by accompanying an alumina octahedral in the middle of the two-layer silicon-oxy tetrahedron, connects by shared Sauerstoffatom between the two.Sheet interlayer positively charged ion Na ²⁺, Ca ²⁺, Mg ²⁺After activated technology (cationic exchange) processing, monomer or polymer molecule are inserted in the nanometer space of PAL material (clay of laminar silicate) interlayer, utilize heat of polymerization or shearing force, laminated clay is peeled off formation of nanostructured unit or microcell, and be distributed to equably in the matrix of polymkeric substance.Strengthened inorganics and polymeric matrix interphase interaction like this, the mechanical tenacity of matrix material is greatly improved.

Embodiment

1, with the cationic exchange total volume is 80meg/100g, particle diameter is the PAL powder body material (dioxide-containing silica 80%) of 3 μ m, activated processing, consumption 10g adds water 100ml, after waiting to be uniformly dispersed, by 1400 rev/mins of stirring velocitys, stir and obtained steady suspension in 30 minutes, be heated to 95 ℃, cationite, quaternary amine solution 5g, splash in the suspension, soaking time 1.5h is cooled to 20 ℃ naturally, add water washing behind the filtering moisture content again two to three times, detecting diafiltration liquid with 0.2% silver nitrate solution does not have bromide anion, and after the vacuum-drying, it is that 3 μ m pellets are stand-by that post is worn into granularity.

2, with the PAL powder after the above-mentioned activation, be dispersed in the organic plastics polymerization reaction kettle in the ratio of (5～10%), by full and uniform stirring, after the dehydration degassing, inject mould, make its curing molding, can obtain the matrix material of high performance index.

Claims

1, (its raw material is a polygorskite for the PAL powder body material after ultramicronising is purified with polygorskite, through the ultramicronising purification processes, polygorskite purity＞90%, particle diameter＜8 μ), its dioxide-containing silica 〉=80%, attrition process becomes the powder of particle size＜3 μ m, handles through particle surface, obtains the good powder of discreteness.

2, according to claim 1, the PAL fire retardant material, according to different classes of organic plastics, ratio in 2～20%, with the organic plastics polymkeric substance, monomer or polymer molecule are inserted in the nanometer space of PAL material (clay of laminar silicate) interlayer, obtain high temperature tolerance and high performance polymer/laminated nm-silicate composite material thus.