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A kind of bio-based flame retardant microcapsule and preparation method thereof

A flame retardant, bio-based technology, applied in the field of flame retardant materials, to achieve the effect of green source of raw materials, high packaging efficiency, excellent thermal stability and flame retardant performance

Active Publication Date: 2022-05-03
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the stability and flame retardancy of bio-based flame retardants need to be further improved in the prior art, the present invention provides a bio-based flame retardant microcapsule and its preparation method

Method used

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  • A kind of bio-based flame retardant microcapsule and preparation method thereof
  • A kind of bio-based flame retardant microcapsule and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] The embodiment of the present invention provides a preparation method of bio-based flame retardant microcapsules, which specifically includes the following steps:

[0046] Step a, add 1.0g dimethylolpropionic acid (DMPA), 7.54g phytic acid (PA) and 7.06g melamine (MA) into 60mL deionized water respectively, disperse evenly, then stir at 110r / min, 85 Under the condition of ℃, add the 2,2-dimethylol propionic acid dispersion liquid dropwise to the melamine dispersion liquid, react for 2 hours, then slowly add the phytic acid dispersion liquid dropwise into the reaction system, and continue the reaction after all the dropwise addition is completed 3h, suction filtration, washing, drying, core material;

[0047] Step b, weigh 13.5g of polypropylene glycol (PPG1000) into a reactor with PTFE stirring paddle, vacuum dehydrate at 120°C for 1h, then cool down to 85°C, blow nitrogen, install a condensing reflux tube, and add 3.3g of toluene diisocyanate (TDI) and 1.2g dimethylol...

Embodiment 2

[0051] The embodiment of the present invention provides a preparation method of bio-based flame retardant microcapsules, which specifically includes the following steps:

[0052] Step a, add 2.6g dimethylolpropionic acid (DMPA), 7.54g phytic acid (PA) and 7.06g melamine (MA) into 60mL deionized water respectively, disperse evenly, then at a stirring speed of 100r / min, 80 Under the condition of ℃, add the 2,2-dimethylolpropionic acid dispersion liquid dropwise to the melamine dispersion liquid, react for 3 hours, then slowly add the phytic acid dispersion liquid dropwise into the reaction system, after all the dropwise addition is completed, continue the reaction 4h, suction filtration, washing, drying, core material;

[0053] Step b, weigh 13.5g of polypropylene glycol (PPG1000) into the reactor with PTFE stirring paddle, vacuum dehydrate at 120°C for 1h, then cool down to 75°C, blow nitrogen, install a condensing reflux tube, and add 3.3g of toluene diisocyanate (TDI) and 1....

Embodiment 3

[0057] The embodiment of the present invention provides a preparation method of bio-based flame retardant microcapsules, which specifically includes the following steps:

[0058] Step a, add 0.55g dimethylolpropionic acid (DMPA), 7.95g phytic acid (PA) and 3.1g melamine (MA) into 60mL deionized water respectively, disperse evenly, then stir at 100r / min, 75 Under the condition of ℃, add the 2,2-dimethylol propionic acid dispersion liquid dropwise to the melamine dispersion liquid, react for 4 hours, then slowly add the phytic acid dispersion liquid dropwise into the reaction system, and continue the reaction after all the dropwise addition is completed 5h, suction filtration, washing, drying, core material;

[0059] Step b, weigh 11.4g of polypropylene glycol (PPG1000) and add it to a reactor with a PTFE stirring paddle, vacuum dehydrate at 120°C for 1 hour, then cool down to 80°C, blow nitrogen, install a condensing reflux tube, and add 5.41g of toluene diisocyanate (TDI) and...

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Abstract

The invention relates to the technical field of flame retardant materials, and specifically discloses a bio-based flame retardant microcapsule and a preparation method thereof. The raw materials of the microcapsule core material include 2,2-dimethylolpropionic acid, phytic acid and nitrogen-containing compounds with a molar ratio of 0.3-2:1:2-8; the wall material includes the following raw material groups in parts by mass Parts: 3-7 parts of diisocyanate, 10-14 parts of polyether diol, 1-2 parts of hydrophilic chain extender and 1-3 parts of phosphorus-containing compound. The invention synthesizes a bio-based nitrogen-phosphorus synergistic flame retardant by using phytic acid, nitrogen-containing compounds and 2,2-dimethylolpropionic acid as raw materials, and then adopts a step-by-step polymerization method to prepare an intrinsic flame-retardant modified polyurethane prepolymer polymer, and then microencapsulated the bio-based phosphorus synergistic flame retardant by in-situ polymerization, which significantly improved the stability and flame retardancy of the bio-based flame retardant; and the source of raw materials and the preparation process are green and environmentally friendly , in line with the development trend of "carbon neutrality", and has high potential application value.

Description

technical field [0001] The invention relates to the technical field of flame retardant materials, in particular to a bio-based flame retardant microcapsule and a preparation method thereof. Background technique [0002] Most polymer materials are flammable due to their own structure, so endowing them with flame retardant properties is the key to their safe use. Flame retardants are functional additives that impart flame retardancy to polymer materials. At present, the most effective flame retardants among all kinds of flame retardants are halogen flame retardants, but they will produce toxic gas and dense smoke after burning, and their environmental protection is poor. Although people's awareness of environmental protection is gradually increasing, the greening of flame retardants has become an inevitable choice for the development of flame retardant technology. The use of naturally occurring bio-based materials as flame retardants meets the requirements of the green strat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/3492C08K5/521C08K9/10C08G18/34C08G18/48C08G18/66
CPCC08K9/10C08K5/34928C08K5/521C08G18/6692C08G18/4825C08G18/348
Inventor 顾丽敏史亚楠张林雅
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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