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Variable-density ethylene propylene diene monomer thermal insulation functional material and preparation method thereof

A technology of EPDM rubber and functional materials, applied in the direction of rubber layered products, chemical instruments and methods, layered products, etc., can solve the problem that the light weight of the heat insulation layer cannot meet the requirements of special fields, and cannot cope with harsh and harsh conditions environment, joint peeling, etc., to improve the ability to resist harsh environments, stabilize the structure, and improve the effect of connection force

Active Publication Date: 2020-05-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the EPDM-type heat insulation layer obtained in the prior art has the problem of single thermal conductivity, and the light weight of the heat insulation layer cannot meet the requirements of special fields, and the heat insulation layer has been under the scour of high temperature for a long time, and the joints with the material interface Easy to peel off due to thermal stress, unable to cope with harsher and harsher environments

Method used

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  • Variable-density ethylene propylene diene monomer thermal insulation functional material and preparation method thereof

Examples

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Embodiment 1

[0032] This embodiment discloses a variable-density EPDM rubber heat-insulating functional material, which is composed of three layers: an anti-ablation functional layer, a heat-insulating layer, and an easy-bonding layer, and the thickness ratio of the three layers is 1:2:1, wherein:

[0033] The composition of the anti-ablation functional layer is calculated in parts by mass: EPDM rubber: 100 parts, fumed silica: 20 parts, kaolin: 20 parts, talcum powder: 25 parts, Al(OH) 3 : 15 parts, zinc oxide: 5 parts, stearic acid: 2 parts, paraffin oil: 10 parts, tetramethylthiuram disulfide (TMTD): 1.5 parts, benzothiazole disulfide (DM): 1 part, Sulfur: 1.5 parts, 3mm chopped carbon fiber: 8 parts.

[0034] The composition of the thermal insulation layer is calculated in parts by mass: EPDM rubber: 100 parts, fumed silica: 25 parts, zinc oxide: 5 parts, stearic acid: 3 parts, paraffin oil: 15 parts, disulfide Tetramethylthiuram (TMTD): 1.5 parts, benzothiazole disulfide (DM): 1 part...

Embodiment 2

[0043] This embodiment discloses a variable-density EPDM rubber heat-insulating functional material, which is composed of three layers: an anti-ablation functional layer, a heat-insulating layer, and an easy-bonding layer, and the thickness ratio of the three layers is 1:2:1, wherein:

[0044] The composition of the anti-ablation functional layer is calculated in parts by mass: EPDM rubber: 100 parts, fumed silica: 25 parts, kaolin: 20 parts, talcum powder: 20 parts, Al(OH) 3 : 15 parts, zinc oxide: 6 parts, stearic acid: 2 parts, paraffin oil: 15 parts, tetramethylthiuram disulfide (TMTD): 1.5 parts, benzothiazole disulfide (DM): 1 part, Sulfur: 1.5 parts, 3mm chopped high silica glass fiber: 8 parts.

[0045] The composition of the thermal insulation layer is calculated in parts by mass: EPDM rubber: 100 parts, fumed silica: 30 parts, zinc oxide: 5 parts, stearic acid: 2 parts, paraffin oil: 15 parts, disulfide Tetramethylthiuram (TMTD): 1.5 parts, benzothiazole disulfide (...

Embodiment 3

[0054] This embodiment discloses a variable-density EPDM rubber heat-insulating functional material, which is composed of three layers: an anti-ablation functional layer, a heat-insulating layer, and an easy-bonding layer, and the thickness ratio of the three layers is 1:2:1, wherein:

[0055] The composition of the anti-ablation functional layer is calculated in parts by mass: EPDM rubber: 100 parts, fumed silica: 30 parts, kaolin: 25 parts, talcum powder: 30 parts, Al(OH) 3 : 10 parts, zinc oxide: 5 parts, stearic acid: 2 parts, paraffin oil: 15 parts, tetramethylthiuram disulfide (TMTD): 1.5 parts, benzothiazole disulfide (DM): 1 part, Sulfur: 1.5 parts, 3mm chopped aramid fiber: 8 parts.

[0056] The composition of the thermal insulation layer is calculated in parts by mass: EPDM rubber: 100 parts, fumed silica: 25 parts, zinc oxide: 5 parts, stearic acid: 2 parts, paraffin oil: 20 parts, disulfide Tetramethylthiuram (TMTD): 1.5 parts, benzothiazole disulfide (DM): 1 part...

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Abstract

The invention relates to a variable-density ethylene propylene diene monomer thermal insulation functional material and a preparation method thereof. The thermal insulation functional material is composed of an anti-ablation functional layer, a heat-insulating layer and an easy-to-bond layer, wherein chopped fibers and a functional filler are added to the anti-ablation functional layer to improvethe ablation resistance of the anti-ablation functional layer, a foaming agent is added to the heat-insulating layer to reduce the density and enhance heat insulation, and a tackifier is added to theeasy-to-bond layer to enhance the bonding effect with a substrate material. The preparation method comprises the following steps: sequentially adding the raw materials of the anti-ablation functionallayer, the heat-insulating layer and the easy-to-bond layer into an open mill, mixing to obtain a mixed rubber sheet, then processing the obtained three layers of the mixed rubber sheets into an integral composite laminated raw rubber sheet by using a flat plate laminating pressurizing method, and carrying out integral pressurizing vulcanization forming in a using process to obtain the rubber heatinsulation layer with the multi-layer functional characteristic. The thermal insulation functional material reduces the overall average density of the material, highly resists impact of high-temperature flame, can efficiently isolate heat, has strong binding force with a substrate material, and is suitable for harsh use environments.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a variable density EPDM thermal insulation functional material and a preparation method thereof. Background technique [0002] With the continuous development of aerospace technology, the research on thermal protection materials has also received people's attention. As a new type of thermal protection material, ceramicable polymer matrix composites are added with corresponding functional fillers to form a dense protective layer in a high temperature environment to insulate heat transfer. [0003] EPDM rubber is a general-purpose synthetic rubber obtained by copolymerizing ethylene, propylene and a small amount of non-conjugated diene. Due to its good elasticity, low temperature performance, aging resistance, weather resistance, and insulating properties, EPDM rubber is used as a matrix material to prepare heat-insulating and ablation-resistant composite mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/16B32B25/04B32B33/00C08L23/16C08J9/32B29B7/72B29C35/02
CPCB29B7/72B29C35/02B32B25/042B32B25/16B32B33/00B32B2250/03B32B2250/248B32B2307/304B32B2307/558B32B2307/714B32B2307/746B32B2605/18C08J9/32C08J2323/16C08L23/16
Inventor 秦岩任劲文宋九强彭正伟
Owner WUHAN UNIV OF TECH
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