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Halogen-free flame-retardant polyvinyl alcohol foam material and preparation method thereof

A foam material and polyvinyl alcohol technology, which is applied in the field of polyvinyl alcohol foam material and its preparation, can solve the problems of poor affinity between flame retardants and polyvinyl alcohol matrix, difficulty in continuous large-scale production, and serious precipitation. Achieve the effect of improving heterogeneous nucleation efficiency, low price, and overcoming large pore size

Active Publication Date: 2012-07-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the halogen-free flame-retardant polyvinyl alcohol materials prepared by these methods are neither halogen-free flame-retardant polyvinyl alcohol foam materials, and the flame retardants used have poor affinity with the polyvinyl alcohol matrix, and the precipitation phenomenon is serious. It is realized by solution blending, so there are problems such as complex preparation process, high cost, and difficulty in continuous large-scale production.

Method used

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  • Halogen-free flame-retardant polyvinyl alcohol foam material and preparation method thereof
  • Halogen-free flame-retardant polyvinyl alcohol foam material and preparation method thereof
  • Halogen-free flame-retardant polyvinyl alcohol foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Mix 100 parts of polyvinyl alcohol 0588, 20 parts of melamine phosphate, 0.1 part of hydrotalcite and 0.1 part of calcium carbonate in a high-speed mixer to make a composite powder; dissolve 0.1 part of borax and 0.1 part of sodium lauryl sulfate in 30 parts of plasticizing foaming agent (water: ethanol = 5: 1) to prepare a mixed solution; add the above-mentioned composite powder into the mixed solution, mix well and seal and store in a constant temperature oven at 60°C to fully swell; fully swell The final compound is continuously extruded and foamed by a screw extruder at a melting temperature of 140° C. and a pressure of 8 MPa to obtain a halogen-free flame-retardant polyvinyl alcohol foam material. The limiting oxygen index of the foam material is 28%, and the vertical burning is UL94-V0 level.

Embodiment 2

[0030] Mix 100 parts of polyvinyl alcohol 1799, 30 parts of melamine polyphosphate, 3 parts of sodium aluminosilicate and 3 parts of zinc oxide in a high-speed mixer to make a composite powder; dissolve 3 parts of boric acid and 3 parts of silicone oil in 40 parts Plasticizing foaming agent (water: ethylene glycol = 5: 1) to prepare a mixed solution; add the above-mentioned composite powder to the mixed solution, mix well and seal and store in a constant temperature oven at 70°C to fully swell; fully swell The final compound is continuously extruded and foamed by a screw extruder at a melting temperature of 160° C. and a pressure of 9 MPa to obtain a halogen-free flame-retardant polyvinyl alcohol foam material. The limiting oxygen index of the foam material is 32%, and the vertical burning is UL94-V0 level.

Embodiment 3

[0032] Mix 100 parts of polyvinyl alcohol 2499, 35 parts of melamine pyrophosphate, 10 parts of 4A molecular sieve and 10 parts of talcum powder in a high-speed mixer to make a composite powder; mix 10 parts of boric acid and 10 parts of sodium dodecylsulfonate Dissolve in 45 parts of plasticizing foaming agent (water: glycerol = 1: 1) to prepare a mixed solution; add the above-mentioned composite powder into the mixed solution, mix well, seal and store in a constant temperature oven at 80°C to fully swell; Continuously extrude and foam the fully swollen compound through a screw extruder at a melting temperature of 180°C and a pressure of 10 MPa to obtain a halogen-free flame-retardant polyvinyl alcohol foam material. The limiting oxygen index of the foam material is 36%, and the vertical burning is UL94-V0 level.

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PUM

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Abstract

The invention discloses a halogen-free flame-retardant polyvinyl alcohol foam material and a preparation method of the halogen-free flame-retardant polyvinyl alcohol foam material. The preparation method comprises the steps of preparing composite powder by uniformly mixing 100 parts of polyvinyl alcohol, 20-35 parts of nitrogen-phosphorus halogen-free flame retardant, 0.1-10 parts of catalyst and 0.1-10 parts of nucleating agent, adding the composite powder into mixed solution formed by 0.1-10 parts of surface active agent, 0.1-10 parts of cross-linking agent and 30-40 parts of plasticizing foaming agent, and swelling sufficiently at the temperature of 60 DEG C-80 DEG C, and then continuously extruding and foaming to obtain the halogen-free flame-retardant polyvinyl alcohol foam material at the temperature of 140 DEG C-180 DEG C and with the pressure 8-10MPa. According to the halogen-free flame-retardant polyvinyl alcohol foam material provided by the invention, the limit oxygen index reaches 36%, the vertical burning reaches L94-V0 level and the material can extinguish automatically without fire, the halogen-free flame-retardant property is good, the hole density of the foaming material can be improved, and the halogen-free flame-retardant polyvinyl alcohol foam material can be widely applied to the fields of heat insulation, sound isolation, shock absorption, packaging, sport equipment, clothes and back cushions, soles, sofa, cushions and the like. In addition, the foam is extruded continuously by melting, so that the preparation process is simple, low in cost and environment-friendly, and the halogen-free flame-retardant polyvinyl alcohol foam material is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl alcohol foam material and its preparation, and in particular relates to a halogen-free flame-retardant polyvinyl alcohol foam material and a preparation method thereof. Background technique [0002] The foam material is a porous composite material with a polymer resin matrix as the main body and numerous cells inside. Due to the characteristics of light weight, sound insulation, heat insulation, cushioning, high specific strength, large adjustable range of physical properties, and simple molding process, foam materials have been widely used in industry, agriculture, daily use, medical treatment, construction, transportation , military, aerospace and other fields, and is becoming an irreplaceable structural or functional material. [0003] In theory, almost all kinds of polymer resins can be made into foam materials through suitable foam molding process, but due to the influence of foam molding ...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K13/02C08K5/3492C08K3/26C08K3/38C08K3/34C08K3/22C08K3/32C08J9/12
Inventor 王琪郭丹白时兵华正坤
Owner SICHUAN UNIV
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