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Flame-retardant ceramic eva and preparation method thereof

A technology of ceramicization and ceramicization powder, which is applied in the field of composite materials and their preparation, can solve the problems of inability to maintain the integrity of the product, no mechanical strength of the burnt residue, burning of the EVA material, etc., to achieve improved mechanical properties, long service life, Improves hardness and smoothness

Inactive Publication Date: 2018-12-18
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional EVA composite materials have poor fire resistance, and their mechanical properties are insufficient in some application fields. Ordinary EVA materials are generally completely burned in a fire. The current technology mainly uses halogen-free low-smoke flame-retardant EVA. These polyolefins are in a fire. Combustion is flammable and self-extinguishing, and plays a certain role in fire
However, after continuous high-temperature combustion, the burning residue has no mechanical strength, melts and drips, and cannot maintain the integrity of the product, which will cause more dangerous secondary disasters, such as short circuits after the sheath and insulation of the cable are burned.

Method used

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  • Flame-retardant ceramic eva and preparation method thereof
  • Flame-retardant ceramic eva and preparation method thereof
  • Flame-retardant ceramic eva and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of flame-retardant ceramic EVA comprises the following steps:

[0042] ① Knead 100 parts of EVA (ethylene-vinyl acetate copolymer), 60 parts of fumed silica, 2 parts of antioxidant, and 40 parts of hydroxide flame retardant in a kneader;

[0043] ② Vacuumize the kneader, keep the vacuum at -0.1~-0.04Mpa, and keep the temperature at 120°C;

[0044] ③Put 60 parts of porcelain powder into the kneader to knead the porcelain powder and the kneaded EVA (ethylene-vinyl acetate copolymer) evenly to form a lump of ceramic polyolefin;

[0045] ④ Move the lumpy ceramic EVA out of the kneader and cool it down;

[0046] ⑤ Put the cooled lump ceramicized EVA on the mill, add 2 parts of cross-linking agent and 1 part of cross-linking auxiliary agent to form ceramic EVA after kneading.

[0047] EVA is an ethylene-vinyl acetate copolymer, in which the vinyl acetate (VA) content is 5% to 40%.

[0048] White carbon black is fumed white carbon black with a particle size ...

Embodiment 2

[0065] The preparation of flame-retardant ceramic EVA comprises the following steps:

[0066] ①Knead 100 parts of EVA (ethylene-vinyl acetate copolymer), 50 parts of fumed silica, 2 parts of antioxidant, and 30 parts of hydroxide flame retardant in a kneader;

[0067]② Vacuumize the kneader, keep the vacuum at -0.1~-0.04Mpa, and keep the temperature at 120°C;

[0068] ③Put 70 parts of porcelain powder into the kneader to knead the porcelain powder and the kneaded EVA (ethylene-vinyl acetate copolymer) evenly to form a lump of ceramic polyolefin;

[0069] ④ Remove the agglomerated ceramized polyolefin from the kneader and cool it down;

[0070] ⑤ Put the cooled lump-shaped ceramic EVA on the mill, add 1.8 parts of cross-linking agent, and 0.8 parts of cross-linking auxiliary agent to form ceramic EVA after kneading.

[0071] EVA is an ethylene-vinyl acetate copolymer, in which the vinyl acetate (VA) content is 5% to 40%.

[0072] Silica is fumed silica with a particle size o...

Embodiment 3

[0088] The preparation of flame-retardant ceramic EVA comprises the following steps:

[0089] 1. Mix 100 parts of EVA (ethylene-vinyl acetate copolymer), 70 parts of fumed silica, 2 parts of antioxidant, and 35 parts of hydroxide flame retardant in a kneader;

[0090] ② Vacuumize the kneader, keep the vacuum at -0.1~-0.04Mpa, and keep the temperature at 120°C;

[0091] ③Put 60 parts of porcelain powder into the kneader to knead the porcelain powder and the kneaded EVA (ethylene-vinyl acetate copolymer) evenly to form a lump of ceramic polyolefin;

[0092] ④ Remove the agglomerated ceramized polyolefin from the kneader and cool it down;

[0093] ⑤ Put the cooled mass of ceramic EVA on the mill, add 2.5 parts of crosslinking agent and 1 part of crosslinking aid to form ceramic EVA.

[0094] EVA is an ethylene-vinyl acetate copolymer, in which the vinyl acetate (VA) content is 5% to 40%.

[0095] White carbon black is fumed white carbon black with a particle size of 10-15 μm. ...

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Abstract

The invention relates to a flame-retardant ceramic EVA and a preparation method thereof, relating to a composite material and a preparation method thereof, comprising: 100 parts of EVA, 10-60 parts of fumed white carbon black, 1-5 parts of antioxidant, cross-linking auxiliary 0.2-3 parts of agent, 1-8 parts of coupling agent, 10-180 parts of zinc borate porcelain powder, 10-60 parts of hydroxide flame retardant, and 0.2-4 parts of cross-linking agent. The above materials are kneaded evenly in a kneader to form a group of ceramic EVA, and the ceramic EVA composite material with a cross-linked structure can be obtained after kneading. The present invention can significantly improve the mechanical properties of the EVA composite material. The EVA composite material of the present invention selects a suitable cross-linking agent and processing method, carries out cross-linking treatment on the EVA material and adds a zinc borate type ceramic powder, which can make the cross-linking process The mechanical properties of the ceramicized EVA composite material after bonding are significantly improved, the sintering temperature is reduced, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a flame-retardant ceramic EVA and a preparation method thereof. Background technique [0002] Traditional EVA composite materials have poor fire resistance, and their mechanical properties are insufficient in some application fields. Ordinary EVA materials are generally completely burned in a fire. The current technology mainly uses halogen-free low-smoke flame-retardant EVA. These polyolefins are in a fire. Combustion is flammable and self-extinguishing, which plays a certain role in fire. However, after continuous high-temperature combustion, the burning residue has no mechanical strength, melts and drips, and cannot maintain the integrity of the product, which will cause more dangerous secondary disasters, such as short circuits after the sheath and insulation of the cable are burned. The invention is easy to process and has low production cost, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/06C08K9/04C08K3/36C08K5/3492C08K3/34C08K3/22C08K3/38C08K5/14
CPCC08K3/22C08K3/34C08K3/36C08K3/38C08K5/14C08K5/34924C08K9/04C08K9/06C08K13/06C08K2003/2224C08K2003/2227C08K2003/387C08K2201/003C08K2201/014C08L2201/02C08L2203/202C08L23/0853
Inventor 梁兵孙重阳
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY