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High-strength high-heat-resistance flame-retardant silicone rubber material and preparation method thereof

A high heat resistance, silicone rubber technology, applied in the field of flame retardant polymer materials, can solve the problems of poor platinum flame retardant effect, low mechanical properties, flame retardant precipitation and other problems, and achieve excellent mechanical properties, small mechanical properties, High flame retardant efficiency

Active Publication Date: 2017-05-10
SHANDONG SHIP TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halogen-free flame-retardant silicone rubber is a research hotspot at home and abroad, mainly including: (1) The inorganic flame-retardant system represented by magnesium aluminum hydroxide mainly has problems such as poor heat resistance, high addition amount, and low mechanical properties; ( 2) The phosphorus-nitrogen flame retardant system mainly has problems such as flame retardant precipitation and poor heat resistance; (3) the platinum flame retardant system is expensive, and the pure platinum flame retardant effect is not good, and other flame retardants need to be compounded
The above flame retardant systems basically meet the requirements in general fields, but in some extreme fields, such as aerospace, ships, chemical machinery, locomotives, nuclear power and other fields, they cannot meet their needs

Method used

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  • High-strength high-heat-resistance flame-retardant silicone rubber material and preparation method thereof
  • High-strength high-heat-resistance flame-retardant silicone rubber material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0068] Preparation method based on caged polysilsesquioxane phosphorus-containing flame retardant:

[0069] (1) Weigh 242G of 29,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 209GVTES dissolved in 300ML toluene after drying at 110℃ for 4H, pour into Stir the reaction vessel of the device, add 8G of azobisisobutyronitrile, heat and stir for 10H, and distill off toluene under reduced pressure at 110°C to obtain light yellow liquid DOPO-VTES.

[0070] (2) Dissolve 95GDOPO-VTES in methanol and add it to a reaction vessel equipped with a condenser, heat up to 80°C, add 2ML phosphoric acid dropwise, continue stirring for 24H, filter to obtain a white powder, rinse with deionized water 3 times, 100°C After vacuum drying, a phosphorus-containing flame retardant based on caged polysilsesquioxane was obtained with a yield of 97%.

[0071] Preparation method of reactive phosphorus-containing silicon-containing flame retardant:

[0072] Dry 216G (1MOL) 9,10-dihydro-9-oxa-1...

Embodiment 1

[0075] In this embodiment, both component A and component B are calculated on the basis of 100 parts by mass fraction.

[0076] Preparation of component A: First, mix 50.98 parts of vinyl silicone rubber (molecular weight: 700,000), 4 parts of p-high vinyl silicone oil (viscosity of 2000mpa.s, vinyl content (mass fraction) 2.5%), and 3 parts of hydroxyl silicone oil (the hydroxyl content (mass fraction) is 5.2%) and put them into the vacuum kneader together, after stirring evenly, add 17 parts of hydrophobic fumed silica (specific surface area 280g / m2, dimethyl dichlorosilane modified ), after adding, continue kneading for 2 hours, mix 18 parts of compound flame retardant (the preparation ratio is calculated in parts by weight: 5.5 parts of melamine polyphosphate, 3.5 parts of ethyl aluminum hypophosphite, 3.5 parts of cage-based Add polysilsesquioxane phosphorus-containing flame retardant, 5.5 parts of reactive phosphorus-containing silicon-containing flame retardant) and 3 p...

Embodiment 2

[0080] In this embodiment, both component A and component B are calculated on the basis of 100 parts by mass fraction.

[0081] Preparation of component A: First, 45.98 parts of vinyl-terminated silicone rubber (molecular weight: 800,000), 8 parts of p-high vinyl silicone oil (viscosity of 6500mpa.s, vinyl content 1.26%), 2.5 parts of hydroxyl silicone oil (hydroxyl content 6%) together in a vacuum kneader, after stirring evenly, add 17.5 parts of hydrophobic fumed silica (specific surface area 320g / m2, modified by hexamethyldisilazane) in batches, after adding, Continue kneading for 2 hours, with 18 parts of compound flame retardant (its preparation ratio is calculated in parts by weight: 3 parts of melamine polyphosphate, 3 parts of ethyl aluminum hypophosphite, 6 parts based on cage polysilsesquioxane Phosphorus-containing flame retardant, 6 parts of reactive phosphorus-containing silicon-containing flame retardant) and 5 parts of cerium hydroxide were added to the vacuum k...

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Abstract

The invention discloses a high-strength high-heat-resistance flame-retardant silicone rubber material and a preparation method thereof. The high-strength high-heat-resistance flame-retardant silicone rubber material is composed of components A and B, wherein the component A comprises vinylsiloxane rubber, high vinyl silicone oil, hydrogen-containing silicone oil, hydrophobic fumed silica, a cross-linking inhibitor, a composite flame retardant and heat-resistant aids; the component B comprises vinylsiloxane rubber, high vinyl silicone oil, a platinum catalyst, a composite flame retardant, heat-resistant aids and hydrophobic fumed silica. The preparation method comprises the following steps: mixing the component A and the component B according to a mass ratio of 1:1, and curing at the temperature of 80-140 DEG C for 10 minutes, so as to obtain the high-strength high-heat-resistance flame-retardant silicone rubber material. The high-strength high-heat-resistance flame-retardant silicone rubber material disclosed by the invention is high in flame-retardant property, excellent in mechanical property, odorless and simple and convenient in vulcanization, does not need to be subjected to secondary vulcanization and is widely applied to the fields of space flight and aviation, locomotives, nuclear power, medical treatment, chemical machinery and the like.

Description

technical field [0001] The invention relates to a high-strength, high-heat-resistant, flame-retardant silicone rubber material and a preparation method thereof, belonging to the technical field of flame-retardant polymer materials. Background technique [0002] Silicone rubber material is a kind of polymer whose main chain is mainly composed of silicon-oxygen bonds. It is an inorganic-organic hybrid material. The material has a certain self-extinguishing property, but it is still a combustible polymer material. As the application range of silicone materials becomes wider and wider, the flame retardancy of silicone rubber has also become a research hotspot. [0003] At present, the flame retardant of silicone rubber mainly includes halogen-free flame retardant and halogen-containing flame retardant. The latter has been banned in many developed countries due to environmental protection issues. Halogen-free flame-retardant silicone rubber is a research hotspot at home and abro...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08L83/05C08L83/08C08K13/06C08K3/36C08K5/3492C08K3/22C08K5/5425
CPCC08K2201/006C08K2201/014C08L83/04C08L2201/02C08L2201/08C08L2205/02C08L2205/025C08L2205/035C08L83/06C08L83/08C08K13/06C08K5/34928C08K5/5425C08K2003/2213C08K3/36
Inventor 汤飞王新波刘增杰李涛黄玉东邱化玉张孝阿
Owner SHANDONG SHIP TECH RES INST
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