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Flame-retardant silicone rubber material as well as preparation method and application thereof

A silicone rubber and rubber technology, applied in the field of materials, can solve the problems of detrimental physical and mechanical properties such as strength and rebound of silicone rubber materials, the inability of the system formulation to achieve the optimal ratio, and the unclear theoretical optimal ratio relationship. Achieve good physical and mechanical properties, good compatibility and dispersion, and solve the effect of single flame retardant element

Active Publication Date: 2022-03-15
PRESAFER QINGYUAN PHOSPHOR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the above four types of flame retardants are compounded and synergistically flame retardant, the theoretical optimal ratio relationship of each component is not clear, which leads to the failure of the system formulation to achieve the optimal ratio, and the compatibility of each component with silicone rubber is relatively poor. Poor, making it easy to agglomerate during the mixing process, thus damaging the physical and mechanical properties of the silicone rubber material at room temperature, such as strength and rebound

Method used

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  • Flame-retardant silicone rubber material as well as preparation method and application thereof
  • Flame-retardant silicone rubber material as well as preparation method and application thereof
  • Flame-retardant silicone rubber material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0068] The flame retardant silicone rubber material in this example includes the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 35 parts of precipitated silica, 7 parts of dihydroxypolydimethylsiloxane, DPPA-Si3 30 parts of flame retardant, 1.0 parts of rosin, 25 parts of kaolin, and 2.0 parts of double pentasulfurizing agent. Wherein, the DPPA-Si ternary flame retardant includes the following raw materials in parts by weight: 4.0 g of γ-aminopropyltriethoxysilane, 4.2 g of triethylamine, 62.4 g of toluene, and 8.4 g of diphenylphosphine chloride.

[0069] In the formula of the flame-retardant silicone rubber material in this example, the molecular weight of methyl vinyl silicone rubber is 480,000, the mole fraction content of vinyl is 0.16%, and the volatile matter is ≤2.0%; SiO in precipitated silica 2 The mass content of ≥97%, CTAB specific surface area 170m 2 / g, DBP oil absorption value 2.6cm 3 / g, heating loss ≤ 8%; dihydroxy pol...

Embodiment 2

[0081] The flame-retardant silicone rubber material in this example includes the following raw materials by weight: 80 parts of methyl vinyl silicone rubber with a molecular weight of 500,000, 20 parts of methyl vinyl silicone rubber with a molecular weight of 650,000, and 45 parts of precipitated white carbon black , 9.0 parts of dimethyldimethoxysilane, 45 parts of DPPA-Si ternary flame retardant, 0.5 parts of solid coumarone, 1.0 parts of microcrystalline wax, 30 parts of magnesium silicate, and 5.0 parts of BIPB-40B curing agent. The DPPA-Si ternary flame retardant includes the following raw materials: 6.0g γ-aminopropyltriethoxysilane, 6.3g triethylamine, 94g toluene, and 13g diphenylphosphine chloride.

[0082] In the formula of flame retardant silicone rubber material, the vinyl mole fraction content of methyl vinyl silicone rubber with a molecular weight of 500,000 is 0.24%, and the vinyl mole fraction content of methyl vinyl silicone rubber with a molecular weight of 6...

Embodiment 3

[0092]The flame retardant silicone rubber material in this example includes the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber, 40 parts of fumed silica, 4.0 parts of dihydroxy polydimethylsiloxane, 4 parts of methyl phenyl 5.0 parts of diethoxysilane, 35 parts of DPPA-Si ternary flame retardant, 2.0 parts of microcrystalline wax, 25 parts of kaolin, 20 parts of calcium carbonate, 1.5 parts of bis-pentasulfurizing agent, and 3.0 parts of BIPB-40B curing agent. The DPPA-Si ternary flame retardant includes the following raw materials: 4.7g of γ-aminopropyltriethoxysilane, 5.0g of triethylamine, 73g of toluene, and 10g of diphenylphosphine chloride.

[0093] In the formula of flame retardant silicone rubber material, the molecular weight of methyl vinyl silicone rubber is 480,000, the vinyl mole fraction content is 0.16%, and the volatile matter is ≤2.0%; SiO in fumed silica 2 Mass content ≥ 97%, CTAB specific surface area 190m 2 / g, DBP oi...

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Abstract

The invention discloses a flame-retardant silicone rubber material as well as a preparation method and application thereof. The flame-retardant silicone rubber material comprises the following components in parts by weight: 100 parts of silicone rubber, 30-60 parts of white carbon black, 6-12 parts of a structure regulator, 20-55 parts of a phosphorus-nitrogen-silicon flame retardant, 0.3-5 parts of a plasticizer, 25-50 parts of filler and 2-7 parts of a vulcanizing agent. The flame-retardant silicone rubber material disclosed by the invention has relatively good physical and mechanical properties and excellent flame-retardant property, all the components in the flame-retardant silicone rubber material have good compatibility and dispersity, and all the components have a synergistic effect; the tensile strength, tearing strength and other mechanical properties, thermal aging property, flame retardant property and other properties of the material are jointly improved.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a flame-retardant silicone rubber material and its preparation method and application. Background technique [0002] With the development of society and economy, human beings have higher and higher requirements for flame retardancy of rubber materials. Compared with natural rubber and other synthetic rubbers, the main chain of silicone rubber is mainly composed of Si-O inorganic structure, and the side group is methyl or other structural elements such as vinyl. With the characteristics of main chain saturation, semi-inorganic, amorphous and non-polar, it can be confirmed that after the silicone rubber is heated, there are mainly two types of reactions: oxidative decomposition of side chain organic groups and main chain unbuckle degradation. Molecular cyclic siloxanes further accelerate the degradation of silicone rubber. [0003] The flame retardancy of silicone rubber is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08K5/544C08K3/34C08K3/26
CPCC08L83/04C08L2201/02C08K2003/265C08K5/544C08K3/346C08K3/26
Inventor 薛帅伟刘华夏周侃
Owner PRESAFER QINGYUAN PHOSPHOR CHEM
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