Synergic antiflaming thermoplastic resin and preparation method thereof

A thermoplastic resin and synergistic flame-retardant technology, which is applied in the field of flame-retardant thermoplastic resin and its preparation, can solve problems such as limited applications, and achieve the effects of industrialized production, convenient operation, and high mechanical properties

Inactive Publication Date: 2013-04-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this thermoplastic resin is relatively flammable, which limits its application in production and life, so the flame retardancy of this thermoplastic resin has also attracted more and more attention.

Method used

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  • Synergic antiflaming thermoplastic resin and preparation method thereof
  • Synergic antiflaming thermoplastic resin and preparation method thereof
  • Synergic antiflaming thermoplastic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 4.0 grams of γ-aminopropyltrimethoxysilane silane coupling agent to 750 ml of distilled water at 40°C, stir to dissolve, add 55.0 grams of magnesium hydroxide powder, stir at high speed, the stirring speed is 4000r / min, the stirring time Suction filtration for 1 hour to obtain a filter cake, put the filter cake into a blast drying oven, heat up from room temperature to 105°C ± 5°C, heat preservation and drying time for 2 hours, and naturally cool to room temperature to obtain 54.5 g The modified magnesium hydroxide is denoted as KH550-MH, and the yield is 99%.

Embodiment 2

[0039] Add 43.2 grams of DOPO and 71.6 grams of BMI into the reactor, heat up, stir, and melt them. The reaction temperature is 110°C, the reaction time is 20min-40min, and cooled to obtain 113.6 grams of solid products of halogen-free phosphorus-containing flame retardants. , denoted as DB, the yield is 99%.

Embodiment 3

[0041] Weigh 31.5 grams of EVA and 1.4 grams of DB halogen-free phosphorus-containing flame retardant, mix the two evenly, add them to the internal mixer, heat up to 140°C±5°C to melt them, and after banburying evenly, cool down to 60°C±5°C 5°C, add 0.0140g of azobisisobutyronitrile initiator, continue banburying for 2-3 minutes, heat up to 140°C±5°C again, add 37.1g of KH550-MH into the internal mixer, continue banburying for 15min, and produce The raw materials were used to obtain a thermoplastic resin with a synergistic flame-retardant effect of a halogen-free phosphorus-containing flame retardant and a modified magnesium hydroxide. The samples were molded in a flat vulcanizing machine under the conditions of 140°C±5°C and 100kg / cm2. Item properties are shown in Table 1.

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Abstract

The invention relates to a synergic antiflaming thermoplastic resin and a preparation method thereof. The antiflaming thermoplastic resin comprises the following components: 40-45wt% of thermoplastic resin, 45-53wt% of modified magnesium hydroxide powder and 2-15wt% of halogen-free phosphonium flame retardant and initiator. The preparation method comprises the following steps: (1) drying the magnesium hydroxide powder modified by a coupling agent, and preparing the halogen-free phosphonium flame retardant from 9,10-dihydro-9 oxa-10-phosphorus dinitrogen-10-oxide, bismaleimide and the like according to the mole; and (2) adding the halogen-free phosphonium flame retardant and the thermoplastic resin into an internal mixer, and heating to melt the mixture; cooling, and adding the initiator; heating again to raise temperature; and adding the modified magnesium hydroxide powder into the internal mixer to continuously mix internally so as to obtain the synergy antiflaming thermoplastic resin. The synergic antiflaming thermoplastic resin disclosed by the invention has the advantages of good antiflaming performance, higher mechanical property and low cost, is simple to prepare and is favorable for realizing industrial production.

Description

technical field [0001] The invention belongs to the field of flame-retardant thermoplastic resin and its preparation, in particular to a synergistic flame-retardant thermoplastic resin and its preparation method. Background technique [0002] Magnesium hydroxide flame retardant is also an additive type high smoke suppression flame retardant, and is non-toxic, non-corrosive, good stability, does not produce toxic gas at high temperature, and can produce synergistic flame retardant effect with various substances, and has a wide range of sources , is considered the most promising. Its flame retardant mechanism is mainly thermally decomposed to release water vapor, and the metal oxide layer formed by dehydration can absorb smoke and combustible volatiles, and can cover the surface of the material at the same time. It can be seen that the large amount of magnesium hydroxide flame retardant is harmful to the environment. The main disadvantage is that the performance of the base m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08L77/00C08L71/12C08L21/00C08K9/04C08K9/06C08K3/22C08K5/5357C07F9/6574
Inventor 虞鑫海徐亚新李恩吴爽樊良子
Owner DONGHUA UNIV
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