Medium-density silicone rubber for nuclear power

A silicone rubber and medium-density technology, applied in the field of silicone rubber, can solve the problems of inconvenient construction, easily damaged penetrating parts, high strength, etc., and achieve the effects of good sealing performance, easy decontamination on the surface, and good anti-staining performance

Inactive Publication Date: 2015-09-30
YANTAI JINRUN NUCLEAR POWER MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although inorganic fireproof cement has been used in large quantities due to its low cost, due to its high strength after curing, it is inconvenient to replace or add penetrations, and it is easy to damage the penetrations, and the quality is not stable enough. Therefore, it is currently used in nuclear power countries such as the United States and France. It is no longer used in nuclear power plants in China, and there is also a trend of abandoning this material in new domestic nuclear power projects.

Method used

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  • Medium-density silicone rubber for nuclear power
  • Medium-density silicone rubber for nuclear power
  • Medium-density silicone rubber for nuclear power

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Effect test

Embodiment 1

[0032] The preparation of embodiment 1 nuclear power medium density silicone rubber

[0033] 1. Raw material composition

[0034] Component A: raw material ratio α, ω-dihydroxypolysiloxane 45kg; hydroxyl silicone oil 10kg; platinum catalyst 1kg; zinc borate 12kg; fumed silica 32kg.

[0035] Component B: α, ω-dihydroxypolysiloxane 35kg; hydroxyl silicone oil 10kg; hydrogen-containing silicone oil 10kg; aluminum hydroxide 10kg; fumed silica 35kg.

[0036] 2. Preparation method

[0037] 1) Preparation of component A: Add α,ω-dihydroxy polysiloxane and hydroxyl silicone oil in the raw materials of component A into the reaction kettle, mix for 20 minutes at 25°C and vacuum degree of 0.1MPa, and then add the above mixed solution Add metal catalysts, fillers and flame retardants, stir and mix with a high-speed disperser for 30 minutes, and vacuum degas for 40 minutes; obtain component A;

[0038] 2) Preparation of component B: Add α,ω-dihydroxy polysiloxane, hydrogen-containing si...

Embodiment 2

[0040] The preparation of embodiment 2 nuclear power medium density silicone rubber

[0041] 1. Raw material composition

[0042] Component A: raw material ratio α, ω-dihydroxypolysiloxane 35kg; hydroxyl silicone oil 15kg; platinum catalyst 5kg; zinc borate 10kg; fumed silica 35kg.

[0043] Component B: 45kg of α,ω-dihydroxy polysiloxane; 7kg of hydroxyl silicone oil; 15kg of hydrogen-containing silicone oil; 8kg of aluminum hydroxide;

[0044] 2. Preparation method

[0045] 1) Preparation of component A: Add α,ω-dihydroxypolysiloxane and hydroxyl silicone oil in the raw materials of component A into the reaction kettle, mix for 40min at 20°C and vacuum degree of 0.1MPa, and then add the above mixed solution Add metal catalysts, fillers and flame retardants, stir and mix with a high-speed disperser for 30 minutes, and vacuum degas for 30 minutes; obtain A component;

[0046] 2) Preparation of component B: Add α,ω-dihydroxypolysiloxane, hydrogen-containing silicone oil, and ...

Embodiment 3

[0048] The preparation of embodiment 3 nuclear power medium density silicone rubber

[0049] 1. Raw material composition

[0050] Component A: raw material ratio α, ω-dihydroxypolysiloxane 45kg; hydroxyl silicone oil 15kg; platinum catalyst 5kg; zinc borate 10kg; fumed silica 25kg.

[0051] Component B: α, ω-dihydroxy polysiloxane 40kg; hydroxyl silicone oil 5kg; hydrogen silicone oil 13kg; aluminum hydroxide 12kg; fumed silica 30kg.

[0052] 2. Preparation method

[0053] 1) Preparation of component A: Add α,ω-dihydroxy polysiloxane and hydroxyl silicone oil in the raw materials of component A into the reaction kettle, mix for 10 minutes at 35°C and a vacuum of 0.05MPa, and then add the above mixed solution Add metal catalysts, fillers and flame retardants, stir and mix with a high-speed disperser for 40 minutes, and vacuum degas for 40 minutes; obtain component A;

[0054] 2) Preparation of component B: Add α,ω-dihydroxy polysiloxane, hydrogen-containing silicone oil, and h...

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Abstract

The invention discloses a medium-density fireproof silicone rubber and a preparation method thereof. The medium-density silicone rubber is formed by mixing a component A and a component B in a volume ratio of 1:(0.95-1.02) and curing at 0-40 DEG C. The component A is proportionally composed of alpha,omega-dihydroxy polysiloxane, hydroxy silicone oil, a filler, a flame retardant and a metal catalyst. The component B is composed of alpha,omega-dihydroxy polysiloxane, hydroxy silicone oil, a filler, hydrogen-containing silicone oil and a flame retardant. The medium-density silicone rubber for nuclear power can be used as a fireproof flame-retardant plugging material, has the basic mechanical properties, and has the advantages of high tendency to stain removal, favorable water and air tightness, excellent radiation resistance and excellent flame retardancy.

Description

technical field [0001] The invention relates to a silicone rubber, in particular to a medium-density silicone rubber for nuclear power and its preparation and application, belonging to the field of nuclear power materials. Background technique [0002] The purpose of a fire barrier in a nuclear power plant is to provide a passive boundary around a space that is capable of withstanding and containing an anticipated fire, and that prevents the fire from spreading to materials or items on the non-fire side of the fire barrier, or that does not allow these Direct or indirect damage to materials and items, and the performance of these functions is required to be completed without the action of any fire extinguishing system. Fireproof sealing is to use fireproof sealing materials to seal and fill empty openings, through holes, building gaps, etc., so that they can work together with corresponding components within the specified fire-resistant time to prevent the spread of heat, fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08L83/05C08K3/38C08K3/36C08K3/22
Inventor 于明霞姜振良李杰
Owner YANTAI JINRUN NUCLEAR POWER MATERIAL CO LTD
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