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Method for preparing flame-retardant smoke inhibition polypropylene

A polypropylene and polypropylene material technology, applied in the field of preparation of flame-retardant and smoke-suppressing polypropylene, can solve the problems of poor flame-retardant performance, easy aging, poor low-temperature impact resistance, etc. Emission reduction effect

Inactive Publication Date: 2018-01-30
常州蓝森环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are poor low temperature impact resistance, easy aging, and poor flame retardancy, but they can be overcome by modification

Method used

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  • Method for preparing flame-retardant smoke inhibition polypropylene

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024]Weigh 200g of sepiolite, place it in a stone grinder and grind for 2h, pass through a 100-mesh sieve to obtain sepiolite powder, add 400mL of phosphoric acid solution with a mass fraction of 40% in the plastic basin, pour the sepiolite powder into the plastic basin, Stir for 40 minutes to obtain a sepiolite suspension, pass 10L of ammonia gas into the sepiolite suspension to obtain a flame-retardant mother liquor; weigh 40g of β-cyclodextrin, 12g of sodium hydroxide and 200mL of distilled water into a four-necked flask, Heat the four-neck flask in a water bath to 80°C, start the stirrer, stir and mix at a speed of 300r / min for 30min, and fill 70mL of dimethyl sulfoxide solution of E-51 epoxy resin with a mass fraction of 30% into a constant Pressure dropping funnel, use the constant pressure dropping funnel to drip the dimethyl sulfoxide solution of E-51 type epoxy resin to the four-necked flask with a dropping rate of 5mL / min, keep the temperature for 6h, and obtain the ...

example 2

[0026] Weigh 250g of sepiolite, place it in a stone grinder and grind for 2.5 hours, pass through a 100-mesh sieve to obtain sepiolite powder, add 450mL of phosphoric acid solution with a mass fraction of 40% to the plastic basin, and pour the sepiolite powder into the plastic basin , stirred for 45 minutes to obtain a sepiolite suspension, and 12L of ammonia gas was passed into the sepiolite suspension to obtain a flame-retardant mother liquor; weigh 45g of β-cyclodextrin, 14g of sodium hydroxide and 250mL of distilled water into a four-neck flask , heat the four-necked flask in a water bath to 85°C, start the agitator, stir and mix at a speed of 320r / min for 35min, and put 75mL of dimethyl sulfoxide solution of E-51 epoxy resin with a mass fraction of 30% into Constant pressure dropping funnel, drop the dimethyl sulfoxide solution of E-51 type epoxy resin to the four-necked flask with the constant pressure dropping funnel at a dropping rate of 8mL / min, keep the temperature fo...

example 3

[0028] Weigh 300g of sepiolite, place it in a stone grinder and grind for 3 hours, pass through a 100-mesh sieve to obtain sepiolite powder, add 500mL of phosphoric acid solution with a mass fraction of 40% in the plastic basin, pour the sepiolite powder into the plastic basin, Stir for 50 minutes to obtain a sepiolite suspension, inject 15L of ammonia gas into the sepiolite suspension to obtain a flame-retardant mother liquor; weigh 50g of β-cyclodextrin, 15g of sodium hydroxide and 300mL of distilled water into a four-necked flask, Heat the four-neck flask in a water bath to 90°C, start the stirrer, stir and mix at a speed of 350r / min for 40min, and fill 80mL of dimethyl sulfoxide solution of E-51 epoxy resin with a mass fraction of 30% into a constant Pressure dropping funnel, use the constant pressure dropping funnel to drip the dimethyl sulfoxide solution of E-51 type epoxy resin to the four-necked flask at a dropping rate of 10mL / min, keep the temperature for 8h, and obta...

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Abstract

The invention discloses a method for preparing flame-retardant smoke inhibition polypropylene and belongs to the technical field of resin preparation. Modified nano sponge is prepared from a resin inwhich flame-retardant functional mother liquor is soaked; sepiolite powder in the flame-retardant functional mother liquor is prepared from the reaction that magnesium hydrate crystal and phosphate are generated from a magnesium silicate enriched compound under the action of ammonia gas and phosphoric acid; magnesium hydrate can be decomposed and heat can be absorbed under a high-temperature combustion condition, and then the temperature of polypropylene can be slightly reduced; in addition, high-temperature resistant silicate fiber crystal which is rich in the sepiolite powder is cross-linkedin molecules of polypropylene, and hydrogen bonds are formed; the modified nano sponge can be expanded at a high-temperature state when being combusted, then pyrophosphoric acid melamine can be easily wrapped, and the ammonia gas can be released from the pyrophosphoric acid melamine and ammonium phosphate under a great heat condition; in an agglomeration phase reaction area, high-temperature decomposition reaction heat absorption is achieved, and relatively low temperature is needed; due to the silicate crystal fiber, residual carbon generated after the polypropylene is carbonized is adsorbedin micro-pore structures of the sepiolite powder, then the residual carbon rate is increased, the smoke emission is reduced, and the effects of flame retardancy and smoke inhibition are achieved.

Description

technical field [0001] The invention discloses a method for preparing flame-retardant and smoke-suppressing polypropylene, which belongs to the technical field of resin preparation. Background technique [0002] Polypropylene is a thermoplastic resin produced by the polymerization of propylene. According to the arrangement of the methyl group, it can be divided into three types: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. [0003] When the methyl groups are arranged on the same side of the molecular main chain, it is called isotactic polypropylene. If the methyl groups are arranged randomly on both sides of the molecular main chain, it is called atactic polypropylene. When the methyl groups are arranged alternately on both sides of the molecular main chain, it is called interstitial polypropylene. Regular polypropylene. [0004] Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer, and it is one of the ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L63/00C08L5/16C08K13/06C08K9/02C08K7/26C08K5/3492C08K3/22C08K3/32
Inventor 何俊欣陈莉莉林大伟
Owner 常州蓝森环保设备有限公司
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