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Flame-retardant polyvinyl alcohol foam material

A technology of polyvinyl alcohol and foam materials, which is applied in the field of flame-retardant polyvinyl alcohol foam materials, can solve problems such as high cost, unfavorable structure and performance of polyvinyl alcohol foam materials, and influence on the foaming performance of polyvinyl alcohol foam materials. The effect of low preparation cost, excellent comprehensive performance and simple preparation

Inactive Publication Date: 2016-09-28
李谚华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the polyvinyl alcohol foam material disclosed in the above-mentioned patent CN2012100333871 has many components and high cost, and different components will affect the foaming performance when preparing the polyvinyl alcohol foam material. Too many components are not conducive to improving the polyvinyl alcohol foam. Structure and Properties of Vinyl Alcohol Foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A flame-retardant polyvinyl alcohol foam material is prepared from the following components expressed in parts by mass: 100 parts of polyvinyl alcohol, 40 parts of an inorganic flame retardant, 30 parts of deionized water, and 1 part of a crosslinking agent. The preparation process is as follows: (1) polyvinyl alcohol and deionized water are prepared by molecular composite plasticization technology to obtain thermoplastically processable polyvinyl alcohol particles; (2) polyvinyl alcohol particles, inorganic flame retardant and crosslinking agent are prepared in the The high-speed mixer is fully mixed to obtain blended granules, and then foamed by thermoplastic extrusion in a single-screw extruder to obtain a foam with uniform cells, wherein the processing temperature of the die of the single-screw extruder is 120°C , the screw speed is 15rpm. After testing, the limiting oxygen index (LOI) of the foam material prepared in Example 1 reaches 34%, and the expansion ratio i...

Embodiment 2

[0024] A flame-retardant polyvinyl alcohol foam material is prepared from the following components expressed in parts by mass: 100 parts of polyvinyl alcohol, 60 parts of inorganic flame retardant, 40 parts of deionized water, and 3 parts of crosslinking agent. The preparation process is as follows: (1) polyvinyl alcohol and deionized water are prepared by molecular composite plasticization technology to obtain thermoplastically processable polyvinyl alcohol particles; (2) polyvinyl alcohol particles, inorganic flame retardant and crosslinking agent are prepared in the The high-speed mixer is fully mixed to obtain blended particles, and then foamed by thermoplastic extrusion in a single-screw extruder to obtain a foam with uniform cells. The processing temperature of the die of the single-screw extruder is 125°C , the screw speed is 35rpm. After testing, the limiting oxygen index (LOI) of the foam material base material prepared in Example 2 reaches 36%, and the expansion rati...

Embodiment 3

[0026] A flame-retardant polyvinyl alcohol foam material is prepared from the following components expressed in parts by mass: 100 parts of polyvinyl alcohol, 80 parts of inorganic flame retardant, 50 parts of deionized water, and 5 parts of crosslinking agent. The preparation process is as follows: (1) polyvinyl alcohol and deionized water are prepared by molecular composite plasticization technology to obtain thermoplastically processable polyvinyl alcohol particles; (2) polyvinyl alcohol particles, inorganic flame retardant and crosslinking agent are prepared in the The high-speed mixer is fully mixed to obtain blended particles, and then foamed by thermoplastic extrusion in a single-screw extruder to obtain a foam with uniform cells. The processing temperature of the die of the single-screw extruder is 135 ° C , the screw speed is 45rpm. After testing, the limiting oxygen index (LOI) of the foam material base material reaches 35%, and the expansion ratio is about 9.9.

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PUM

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Abstract

The invention discloses a flame-retardant polyvinyl alcohol foam material. The flame-retardant polyvinyl alcohol foam material is prepared from, by mass, 100 parts of polyvinyl alcohol, 40-80 parts of an inorganic flame retardant, 30-50 parts of deionized water and 1-5 parts of a cross-linking agent, wherein the preparation process is that the polyvinyl alcohol and the deionized water are prepared into thermoplastic processed polyvinyl alcohol particles by adopting a molecular composite plastifying technology; the polyvinyl alcohol particles, the inorganic flame retardant and the cross-linking agent are fully mixed in a high-speed mixer to obtain blended particles, then the blended particles are put into a single screw extruder, and thermoplastic extrusion and foaming are performed to obtain the foam material with uniform foam holes, wherein the processing temperature of a mouth mold of the single screw extruder is 120-135 DEG C, and the screw speed is 15-45 rpm. The foam material with uniform foam holes is prepared through thermoplastic extrusion and foaming by using few components, has excellent comprehensive properties and has the advantages of being low in cost, simple in preparation and the like.

Description

technical field [0001] The invention belongs to polyvinyl alcohol foam material and its preparation technology, in particular to a flame-retardant polyvinyl alcohol foam material. Background technique [0002] As a water-soluble polymer material, polyvinyl alcohol (PVA) not only endows it with strong polarity, high melting point, heat resistance, antistatic, biocompatibility, solvent resistance, etc. characteristics, but also a fully biodegradable synthetic polymer material. PVA has no melting droplets and no harmful gas release during the combustion process, and can be used as a macromolecular char-forming agent during the degradation process, which is its unique feature in the preparation of flame-retardant materials. Therefore, it has obvious advantages and value to prepare halogen-free flame-retardant PVA-based foam materials that are environmentally friendly and have excellent comprehensive performance. [0003] Chinese patent application number CN2012100333871 disclo...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K3/22C08K3/38C08J9/12
CPCC08K3/22C08J9/125C08J2203/10C08J2329/04C08K3/38C08K2003/2227C08K2003/387C08L2201/02C08L2201/22C08L2203/14C08L29/04
Inventor 李谚华
Owner 李谚华
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