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Temperature-sensitive flame-retardant microcapsules, preparation method, and silica gel foam material containing the capsules

A microcapsule, temperature-sensitive technology, applied in the field of silicone flame retardant, can solve the problems of large amount of addition, limited flame retardant performance, deterioration of material mechanical properties and physical and mechanical properties, etc., to improve compatibility, good compatibility, The effect of increasing the curing speed

Active Publication Date: 2019-11-12
陕西西科守安科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing method of adding flame retardants is limited in improving the flame retardant performance of silica gel foam materials, and the relatively large amount of addition causes deterioration of the mechanical properties and physical and mechanical properties of the material, and proposes a temperature-sensitive flame retardant microcapsule and its preparation. The method and the silica gel foam material containing the capsule, the temperature-sensitive microcapsules have good compatibility with the silica gel material, the temperature-sensitive microcapsules are added into the silica gel foam material, and different microcapsules automatically release flame retardants when exposed to fire, thereby improving the flame retardancy of the material

Method used

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  • Temperature-sensitive flame-retardant microcapsules, preparation method, and silica gel foam material containing the capsules
  • Temperature-sensitive flame-retardant microcapsules, preparation method, and silica gel foam material containing the capsules

Examples

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Effect test

Embodiment 1

[0046] First, mix 100 parts of KH570 silane coupling agent with 100 parts of hexamethyldisiloxane evenly, stir, add 0.6 parts of trifluoromethanesulfonic acid and 0.6 parts of hydroquinone, react for half an hour, and then drop 22 Parts of deionized water, dripped in half an hour, reflux for 1.5 hours, add 200 parts of dilute hydrochloric acid (5% concentration) to react for 1 hour, let stand to separate layers, separate the lower polymer layer, and remove the water inside with a water separator parts to obtain UV-curable polysiloxane.

[0047] Take 100 parts of UV-curable polysiloxane, 1 part of medium-high temperature foaming agent, 2 parts of surfactant (Tween 80), 2 parts of photoinitiator (2-hydroxy-2-methyl-1-phenyl- 1-acetone), 1.5 parts of pentaerythritol tetraacrylate were mixed uniformly to form solution A, and the flame retardant was wrapped in solution A by microfluidic technology to prepare a microemulsion, and the microemulsion was cured by ultraviolet light to o...

Embodiment 2

[0049] First, mix 100 parts of KH570 silane coupling agent with 100 parts of hexamethyldisiloxane evenly, stir, add 0.6 parts of trifluoromethanesulfonic acid and 0.6 parts of polymerization inhibitor (hydroquinone); react for half an hour , then add 22 parts of deionized water dropwise, finish dripping in 40 minutes, reflux for 2 hours, add 200 parts of dilute hydrochloric acid (5% concentration) to react for 1.5 hours, let stand for stratification, separate the lower polymer layer, and use a water separator to remove Remove the moisture inside to obtain UV-curable polysiloxane.

[0050] Get 100 parts of UV-curable polysiloxane, 2 parts of medium-high temperature foaming agent, 2 parts of surfactant (Tween 80), 3 parts of photoinitiator (2-hydroxy-2-methyl-1-phenyl- 1-acetone), 1.5 parts of pentaerythritol tetraacrylate were mixed uniformly to form solution A, and the flame retardant was wrapped in solution A by microfluidic technology to prepare a microemulsion, and the micr...

Embodiment 3

[0052] First, mix 100 parts of KH570 silane coupling agent with 100 parts of hexamethyldisiloxane evenly, stir, add 0.6 parts of trifluoromethanesulfonic acid, and 0.6 parts of polymerization inhibitor (hydroquinone), and react for 20 minutes , then add 22 parts of deionized water dropwise, finish dripping in 20 minutes, reflux for 1 hour, add 200 parts of dilute hydrochloric acid (5% concentration) to react for 40 minutes, let stand to separate layers, separate the lower polymer layer, and remove it with a water separator The moisture inside, get UV-curable polysiloxane.

[0053] Take 100 parts of UV-curable polysiloxane, 2 parts of medium-high temperature foaming agent, 1 part of surfactant (Tween 80), 1 part of photoinitiator (2-hydroxy-2-methyl-1-phenyl- 1-acetone), 1.5 parts of pentaerythritol tetraacrylate were mixed uniformly to form solution A, and the flame retardant was wrapped in solution A by microfluidic technology to prepare a microemulsion, and the microemulsion...

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Abstract

The invention more specifically relates to a temperature-sensitive flame-retardant microcapsule, a preparation method thereof, and a silica gel foamed material containing the temperature-sensitive flame-retardant microcapsule. The preparation method is mainly used for solving problems in the prior art that increasing of the flame resistance of silica gel foamed materials is limited by conventionalfire retardant adding method, and material mechanical properties and physical mechanical properties are influenced. The temperature-sensitive flame-retardant microcapsule comprises a capsule wall anda core layer; the core layer is coated by the capsule wall; the core layer is a fire retardant; the capsule wall is composed of ultraviolet light cured polysiloxane, a middle and high temperature foaming agent, a surfactant, a photoinitiator, and tetramethylol methane tetraacrylate. The compatibility of the temperature-sensitive flame-retardant microcapsule with silica gel is excellent; flame resistance is achieved through release of the fire retardant in the temperature-sensitive flame-retardant microcapsule; when indoor combustion is caused, expansion of the middle and high temperature foaming agent in the capsule wall is realized, the capsule wall is broken, the fire retardant in the core material is released, so that flame retardation is realized effectively.

Description

technical field [0001] The invention relates to the technical field of silica gel flame retardant, in particular to a temperature-sensitive flame retardant microcapsule, a preparation method and a silica gel foam material containing the capsule. Background technique [0002] Silicone foam material is a new multi-functional material that combines the characteristics of silicone rubber and foam material. The material is light, sound-absorbing, and earthquake-resistant. It can be used as high-performance materials such as damping, vibration reduction, sound insulation, and heat insulation. It is widely used in national defense, aerospace, transportation, electronics, construction, and furniture. It is expected to replace carbon-based Polymer foam material. However, there are a large number of hydrocarbon groups on the side chain of silicone, which will burn at high temperature or under fire conditions. At the same time, after the silicone is foamed, a hole structure is formed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10B01J13/02C08G77/20C08L83/04C08J9/00
CPCB01J13/02C08G77/20C08J9/009C08J2383/04C08K9/10
Inventor 邓军康付如焦冬生王伟峰易欣张嬿妮刘志超
Owner 陕西西科守安科技有限公司