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Core-shell type nanostructured polymeric microsphere fire retardant, preparation method and application of core-shell type nanostructured polymeric microsphere fire retardant

A nano-polymer, core-shell technology, which is applied in the field of core-shell nano-polymer microsphere flame retardants and their preparation, can solve the problem of no nano-polymer microsphere flame retardants and no halogen-free flame retardants. , product performance deterioration and other issues, to achieve the effect of reducing migration, lasting flame retardant performance, improving dispersion and flame retardant performance

Active Publication Date: 2013-06-05
苏州安鸿泰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two cases of flame retardant polystyrene adopt the currently relatively environmentally friendly halogen-free flame retardant method, and avoid the large-scale use of bromine-containing compounds by adding phosphorus-based flame retardants, most of the flame retardants used are still Small molecules, this kind of flame retardant products still have the disadvantage that the performance of the product will deteriorate due to the loss and migration of the flame retardant during use
[0005] Taking the flame retardant of polystyrene as an example above, it only briefly describes and analyzes the application status of flame retardants in polymer materials, and points out many problems in the application of flame retardants; in fact, there is no Discover the ideal halogen-free flame retardant for polystyrene applications
On the other hand, there has been no relevant report on using nano-polymer microspheres as a flame retardant so far.

Method used

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  • Core-shell type nanostructured polymeric microsphere fire retardant, preparation method and application of core-shell type nanostructured polymeric microsphere fire retardant
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  • Core-shell type nanostructured polymeric microsphere fire retardant, preparation method and application of core-shell type nanostructured polymeric microsphere fire retardant

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Embodiment 1

[0034] In this embodiment, monomer I is firstly prepared. The method can refer to the content disclosed in the patent of Chinese Patent Publication No. 102391403A. The specific operation process is as follows: in a 250ml three-necked bottle equipped with mechanical stirring and constant pressure dropping funnel, add 12.2 g (0.2mol) ethanolamine and 40ml tetrahydrofuran, stir at room temperature, after 10 minutes, add 40.0g (0.4mol) formaldehyde solution (concentration: 30%), stir and raise the temperature to 70 ° C, under continuous stirring within 2 hours 44.0 g (0.40 mol) of dimethyl phosphite was added dropwise, and the reaction was stopped after 10 hours of reaction. The tetrahydrofuran solvent was removed, the crude product was dissolved in 100 ml of chloroform, washed three times with 10 ml of 0.1 mol / L sodium hydroxide solution, dried and the chloroform was removed to obtain a light yellow transparent liquid. Then take 45.7g (0.15mol) of the light yellow transparent liq...

Embodiment 2

[0037] (1) Fully stir and mix 40 parts of monomer I, 20 parts of styrene, 50% of the total mass of emulsifier and 50% of the total mass of deionized water to prepare a pre-emulsion of the core layer monomer;

[0038] (2) Fully stir and mix 20 parts of monomer I, 20 parts of styrene, the rest of the emulsifier and deionized water to prepare the shell monomer pre-emulsion;

[0039] (3), add 50% of the total mass of the pH regulator and 50% of the total mass of the initiator to the nuclear layer monomer pre-emulsion obtained in step (1), then stir and mix and heat up to 70°C, and keep it warm for 60 minutes to prepare Obtain core polymer emulsion;

[0040] (4) Heat the core polymer emulsion prepared in step (3) to 75°C, add the remaining pH regulator, and then drop the previously obtained shell monomer pre-emulsion and the remaining initiator solution simultaneously and at a constant speed Add it, keep it warm for 60 minutes after the dropwise addition, and then drop to room tem...

Embodiment 3

[0044] (1) Fully stir and mix 40 parts of monomer I, 20 parts of ethyl acrylate, 50% of the total mass of emulsifier and 70% of the total mass of deionized water to prepare a pre-emulsion of the core layer monomer;

[0045] (2) Fully stir and mix 20 parts of monomer I, 20 parts of ethyl acrylate, the remaining emulsifier and deionized water to prepare a shell monomer pre-emulsion;

[0046] (3), add 50% of the total mass of the pH regulator and 60% of the total mass of the initiator to the nuclear layer monomer pre-emulsion obtained in step (1), then stir and mix and heat up to 65°C, and keep it warm for 60 minutes to prepare Obtain core polymer emulsion;

[0047] (4) Heat the core polymer emulsion prepared in step (3) to 70°C, add the remaining pH regulator, and then drop the previously obtained shell monomer pre-emulsion and the remaining initiator solution simultaneously and at a constant speed Add it, keep warm for 40 minutes after the dropwise addition, and then drop to r...

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Abstract

The invention discloses core-shell type nanostructured polymeric microsphere fire retardant, a preparation method and application of the core-shell type nanostructured polymeric microsphere fire retardant. Through the method of seeded emulsion polymerization, monomers which include phosphorus and nitrogen elements and polymerizable monomers which include double bond are copolymerized to form macromolecular polymer microspheres with nanoscale and a core-shell structure. The macromolecular polymer microspheres can be used as fire retardant, achieves macromolecule quantization of micromolecule fire retardant, and move and running away of the fire retardant in the process of use can be reduced. Compared with traditional additive fire retardant, the core-shell type nanostructured polymeric microsphere fire retardant has the advantages that compatibility of the fire retardant and macromolecular matrixes are improved, and long flame retardant property of materials can be kept. Through adjustment of the proportion of two monomers in the process of preparation, the core-shell structure of the polymeric microspheres can be changed to meet the scattered need in different macromolecular matrixes. Dispersion and flame retardant properties are improved. In addition, the core-shell type nanostructured polymeric microsphere fire retardant has toughening effects to the macromolecular matrixes.

Description

technical field [0001] The invention belongs to the technical field of flame retardant design and preparation, and in particular relates to a core-shell nano-polymer microsphere flame retardant and a preparation method thereof. When applied to a polymer matrix, especially a polystyrene matrix, the material has Good flame retardant and toughening effect. Background technique [0002] With the continuous development of science and technology, many polymer materials with excellent properties such as polystyrene (PS), polyethylene (PE), polymethyl methacrylate (PMMA) and polyurethane (PU) have been widely used in electronics. , automotive, construction, toys, packaging and other industries. These polymer materials are basically derived from petrochemicals, and are composed of carbon and hydrogen elements, so they are highly flammable. In recent years, major fire accidents directly caused by the ignition of polymer materials are not uncommon, whether at home or abroad. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/36C08F212/08C08F220/18C08F220/14C08F120/36C08F112/08C08F120/18C08F120/14C08L25/06C08L33/14
Inventor 台启龙
Owner 苏州安鸿泰新材料有限公司
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