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Microcapsule expansion flame-proof starch-based degradable material and preparation thereof

A degradable material, intumescent flame retardant technology, applied in the field of intumescent flame retardants, to achieve the effects of good water and oil resistance, excellent mechanical properties, and good flame retardant properties

Active Publication Date: 2008-11-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, although there are many literatures and patents about starch-based degradable materials and their preparation methods at home and abroad, there is little about improving their flame retardancy and safety in use patents or documents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]With 40 grams of melamine, 80 grams of concentration by weight of 37% formaldehyde solution is added in a 1000 milliliter three-necked bottle, 200 milliliters of deionized water is added, and the pH of the solution is adjusted to 9.0 with a concentration of 20 percent by weight of sodium hydroxide solution, heated to 80 DEG C, heat preservation for 40 minutes, prepared melamine-formaldehyde prepolymer. Then add 240 grams of ammonium polyphosphate (APP) and 300 milliliters of ethanol, drop into the ammonium hydrogen phosphate of prepolymer resin weight 2%, after stirring, reacting for 120 minutes, through suction filtration, washing with water, dry, obtain white microcapsule expansion Type flame retardant 270 grams.

[0031] Weigh 4.8 kg of cornstarch, 0.05 kg of stearic acid, 0.05 kg of magnesium stearate, and 0.1 kg of maleic anhydride, and add them in sequence to a high-speed mixer preheated to 70°C, start stirring, and heat up to 100°C after 5 minutes , add 1.5 kg of...

Embodiment 2

[0035] With 25 grams of melamine, 50 grams of concentration by weight of 37% formaldehyde solution is added in a 1000 milliliter three-necked bottle, 125 milliliters of deionized water is added, and the pH of the solution is adjusted to 9.0 with a concentration of 20 percent by weight of sodium hydroxide solution, heated to 70°C, heat preservation for 40 minutes to prepare melamine-formaldehyde prepolymer. Then add 250 grams of melamine phosphate (MP) and 500 milliliters of ethanol, drop into ammonium chloride of 2% by weight of the prepolymer resin, stir and react for 180 minutes, after suction filtration, washing with water, drying to obtain white microencapsulated expansion type Flame retardant 276.0 grams.

[0036] Weigh 4.8 kg of cornstarch, 0.05 kg of stearic acid, 0.05 kg of magnesium stearate, and 0.1 kg of maleic anhydride, and add them in sequence to a high-speed mixer preheated to 70°C, start stirring, and heat up to 100°C after 5 minutes , add 2 kg of polyvinyl al...

Embodiment 3

[0040] With 50 grams of melamine, 70 grams of concentration by weight of 37% formaldehyde solution is added in a 1000 milliliter three-necked bottle, and 250 milliliters of deionized water is added, and the pH of the solution is adjusted to 9.0 with a concentration of 20 percent by weight of sodium hydroxide solution, heated to 75°C, heat preservation for 20 minutes to prepare melamine-formaldehyde prepolymer. Then add 300 grams of ammonium polyphosphate (APP) and 400 milliliters of ethanol, drop into the ammonium hydrogen phosphate of 2% by weight of the prepolymer resin, stir and react for 120 minutes, after suction filtration, washing with water, drying to obtain white microencapsulated expansion type Flame retardant 345.0 grams.

[0041] Weigh 4.6 kg of sweet potato starch, 0.042 kg of oleic acid, and 0.058 kg of a mixture of magnesium stearate and stearic acid, and add them in turn to a high-speed mixer preheated to 70°C, start stirring, and heat up to 100°C after 15 minu...

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Abstract

The invention discloses a microcapsule intumescent flame-retarding starch-based degradable material and a method for preparing the same. The method is characterized in that: starch is mixed with plasticizer and compatibilizer, heated to between 70 and 100 DEG C, added with biodegradable high molecular compound, microcapsule intumescent flame retardant and flame-retarding catalyst, and the intumescent flame-retarding starch-based degradable material which is formed by the starch, the plasticizer, the compatibilizer, the biodegradable high molecular compound, the microcapsule intumescent flame retardant and the flame-retarding catalyst is obtained by extruding obtained powder lot for granulation. The method utilizes the flame-retarding synergistic effect of C, N and P, introduces the microcapsule intumescent flame retardant to inhibit untoward reaction of the flame retardant and the starch, and improves the flammability of the material; and the product obtained has excellent flexibility and mechanical property, good water resistance and oil resistance and good flame retardant property, is nontoxic and harmless, can be completely biodegraded, and can be used in the fields such as packages, laminated materials, sport and sanitary articles and so on.

Description

technical field [0001] The invention belongs to the technical field of intumescent flame retardants, in particular to a method for synthesizing microencapsulated intumescent flame retardants and a method for preparing intumescent flame-retardant starch-based degradable materials using the flame retardants. Background technique [0002] The birth of plastics has brought great convenience to human life. However, with the development of the plastics industry, some hidden dangers of its own are gradually exposed. Ordinary plastics have excellent chemical stability, which makes plastics difficult to degrade in nature, and plastic waste is increasing; it not only affects the appearance of the environment, but also pollutes water sources and soil, endangers poultry and wild animals, and brings great harm to the earth's ecological environment. Here comes the heavy burden. [0003] Therefore, the research and development of degradable plastics—especially biodegradable plastics has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08K13/06C08K9/10C08K3/22C08K3/38B29B9/12B29C47/92B29C48/92
CPCB29C47/92B29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 胡源吴昆宋磊
Owner UNIV OF SCI & TECH OF CHINA
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