Silicone rubber halogen-free flame retardant as well as preparation method and application thereof

A technology of silicone rubber and flame retardant, which is applied in the field of flame retardants, can solve the problems of large addition amount, poor heat resistance, and high price, and achieve the effects of good heat resistance, easy precipitation, and high flame retardant efficiency

Active Publication Date: 2022-05-27
东莞市宏泰基阻燃材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the flame retardants for silicone rubber use halogen-free flame retardants. The main halogen-free flame retardants are: (1) Inorganic filled flame retardants such as aluminum hydroxide and magnesium hydroxide, which have a large amount of addition , poor heat resistance, greater impact on the physical properties of the product and other issues; (2) nitrogen-based flame retardants, which also require a relatively large amount of addition; (3) phosphorus-nitrogen-based flame retardants, with relatively high flame retardant efficiency, However, many of them have the problem of easy precipitation of flame retardants and poor heat resistance; (4) the main disadvantage of platinum-based flame retardant systems is that they are expensive, and the flame retardant effect is not ideal when used alone, and they need to be used together with other flame retardants
The various flame retardants listed above can show a better flame retardant effect for the production of relatively thick (thickness above 2 mm) flame retardant silicone rubber products, and when the product is required to be very thin, it can be powerless
Another problem is that some papers or patents claim to be good solutions to problems, and the flame-retardant materials used in them are not available in the market at all, and such technical inventions have no practical significance

Method used

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  • Silicone rubber halogen-free flame retardant as well as preparation method and application thereof
  • Silicone rubber halogen-free flame retardant as well as preparation method and application thereof
  • Silicone rubber halogen-free flame retardant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] A preparation method for preparing an environmentally friendly non-halogen flame retardant comprises the following steps:

[0025] Step 1: Put the piperazine pyrophosphate to be processed into a high-speed mixer, start stirring, heat up to 125°C, add an appropriate amount of modification treatment agent, continue stirring for 10 minutes, and then discharge and cool;

[0026] Step 2: Transfer the material obtained in step 1 to an ultra-fine pulverizer for pulverization, the obtained material is packaged and weighed, marked as material A, and reserved for later use;

[0027] Step 3: Put the melamine cyanurate to be processed into the high-speed mixer, start the mixing, add an appropriate amount of modification agent in the mixing process, continue to mix for 10 minutes, and then transfer it to the ultrafine pulverizer for pulverization. , The obtained material is packaged and weighed, marked as material B, and reserved for later use;

[0028] Step 4: Put the materials A,...

Embodiment 1

[0031] Take 30 grams of material A, 52 grams of material B, 10 grams of aluminum diethyl hypophosphite, 8 grams of zinc borate, and 1.5 grams of silicone oil dispersant, and put them into a small mixer to fully stir and mix evenly to obtain silicone rubber halogen-free flame retardant agent.

[0032] Take 100 grams of raw silicone rubber with a shore hardness of 40 degrees, mix it on an open mill, and add 50 grams of flame retardant and 20 grams of white carbon black in stages. agent, mix thoroughly and evenly.

[0033] Transfer the above-mentioned mixed rubber into a flat vulcanizer that has been preheated to 120°C, and vulcanize it for 3 to 5 minutes to obtain a flame-retardant silicone rubber, which can be used for flame-retardant and other performance tests.

[0034] The flame retardant silicone rubber product of this example can reach the V-0 flame retardant level of 1.6 mm UL-94.

[0035] The relevant performance test results of the flame retardant test pieces are show...

Embodiment 2

[0038] Take 40 grams of the A material, 48 grams of the B material, 6 grams of aluminum diethyl hypophosphite, 6 grams of zinc borate, 1.5 grams of silicone oil dispersant, put into a small mixer, stir and mix evenly, that is, silicone rubber halogen-free flame retardant .

[0039] Take 100 grams of raw silicone rubber with a shore hardness of 40 degrees, mix it on an open mill, and add 65 grams of flame retardant and 20 grams of white carbon black in stages, mix thoroughly and evenly, and then add 1 gram of bis-disulfide. agent, mix thoroughly and evenly.

[0040] Transfer the above-mentioned mixed rubber into a flat vulcanizer that has been preheated to 120°C, and vulcanize it for 3 to 5 minutes to obtain a flame-retardant silicone rubber, which can be used for flame-retardant and other performance tests.

[0041] The flame retardant silicone rubber product of this example can reach the V-0 flame retardant level of 1.0 mm UL-94.

[0042] The relevant performance test resul...

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PUM

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Abstract

The invention relates to the technical field of flame retardants, in particular to a silicone rubber halogen-free flame retardant and a preparation method and application thereof.The silicone rubber halogen-free flame retardant is prepared from, by weight, 10-60 parts of piperazine pyrophosphate, 10-60 parts of melamine cyanurate, 1-20 parts of diethyl aluminum hypophosphite, 1-10 parts of zinc borate and 0.5-8 parts of a modification treatment agent; the modification treating agent comprises at least one of vinyl silicone oil, hydroxyl silicone oil, hydrogen-containing silicone oil, a silane coupling agent KH570 or a silicone oil dispersing agent; the flame retardant is prepared from piperazine phosphate, melamine cyanurate, aluminum diethyl hypophosphite and zinc borate according to certain parts by weight, belongs to a phosphorus-nitrogen flame retardant, is high in flame retardant efficiency, and can be used for flame retardance of ultrathin materials; meanwhile, the problem that the flame retardant is easy to separate out is well solved, a silicone rubber product which is flame-retardant by using the flame retardant is good in heat resistance, and the materials for forming the flame retardant are materials which are industrially produced in batches.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a silicone rubber halogen-free flame retardant and a preparation method and application thereof. Background technique [0002] Silicone rubber is one of the most important silicone products. It is a linear polysiloxane with a high molar mass before vulcanization, and becomes an elastomer with a network structure after vulcanization. According to its vulcanization temperature, silicone rubber can be divided into two types: high temperature (heating) vulcanization type and room temperature vulcanization type; according to product form and compounding method, it can be divided into two types: mixing silicone rubber and liquid silicone rubber. When general-purpose silicone rubber is close to the flame, although it will not burn immediately, it will continue to burn once it catches fire. To make the silicone rubber product have flame retardancy and self-extinguishing perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/38C08K5/3462C08K5/3492C08K5/5313C08K9/06C08L83/04
CPCC08K9/08C08K5/3462C08K5/34928C08K3/38C08K5/5313C08L2201/02C08L2201/22C08K2003/387C08L83/04Y02E60/10
Inventor 潘凯宏刘伟明
Owner 东莞市宏泰基阻燃材料有限公司
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