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LDPE (Low-Density Polyethylene)/EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material and preparation method thereof

A technology of flame-retardant composite materials and brominated flame retardants, which is applied in the field of composite materials, can solve problems such as dripping and high toxicity, and achieve the effects of low exudation, small negative effects, and improved compatibility

Active Publication Date: 2012-08-22
广西华锑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the problems of high toxicity and dripping caused by burning in the existing flame retardants, and to provide a flame-retardant composite material containing LDPE / EVA and its preparation method, using LDPE / EVA as the base resin, adding bromine It is a flame retardant and an inorganic flame retardant. While combining the advantages of these three types of flame retardants, it does not produce dripping when the material is burned.

Method used

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  • LDPE (Low-Density Polyethylene)/EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material and preparation method thereof
  • LDPE (Low-Density Polyethylene)/EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material and preparation method thereof
  • LDPE (Low-Density Polyethylene)/EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of modified antimony trioxide

[0037] Place antimony trioxide in a drying oven at 80-90°C for 60 minutes, then transfer it to a mixer, and add titanate to couple at a ratio of 100:2 by weight of antimony trioxide and coupling agent. agent, at a temperature of 100-110°C and a rotation speed of 1000rpm / min, stirring and modifying for 40 minutes to obtain modified antimony trioxide M-Sb 2 o 3 .

[0038] (2) Raw material formula: (both parts by weight)

[0039] Raw material composition

Number of copies / phr

Low-density polyethylene (LDPE)

75

Ethylene-vinyl acetate copolymer (EVA)

25

Decabromodiphenylethane (DBDPE)

15

Talc powder (TP)

5

Modified antimony trioxide (M-Sb 2 o 3 )

5

Zinc borate (ZB)

2

Hydrotalcites (LDHs)

8

[0040] (2) Preparation method:

[0041] a. Drying of raw materials: Weigh the raw materials according to the above ratio, th...

Embodiment 2

[0051] (1) Preparation of modified antimony trioxide

[0052] Place antimony trioxide in a drying oven at 90-100°C for 80 minutes, then transfer it to a mixer, and add lead ester coupling at a weight ratio of antimony trioxide to coupling agent of 100:3. agent, at a temperature of 110~120°C and a rotation speed of 2000rpm / min, stirring and modifying for 60 minutes to obtain a modified antimony trioxide M-Sb 2 o 3 .

[0053] (2) Raw material formula: (both parts by weight)

[0054] Raw material composition

Number of copies / phr

Low-density polyethylene (LDPE)

50

Ethylene-vinyl acetate copolymer (EVA)

50

Decabromodiphenylethane (DBDPE)

10

Talc powder (TP)

6

Modified antimony trioxide (M-Sb 2 o 3 )

2

Zinc borate (ZB)

4

Hydrotalcites (LDHs)

4

[0055] (3) Preparation method:

[0056] a. Raw material drying: Weigh the raw material according to the above ratio, then ...

Embodiment 3

[0064] (1) Preparation of modified antimony trioxide

[0065] Place antimony trioxide in a drying oven at 85~95°C for 40 minutes, then transfer it to a blender, and add lead ester coupling at a weight ratio of antimony trioxide to coupling agent of 100:3. agent, at a temperature of 105~115°C and a rotation speed of 1500rpm / min, stirring and modifying for 30 minutes to obtain modified antimony trioxide M-Sb 2 o 3 .

[0066] (2) Raw material formula: (both parts by weight)

[0067] Raw material composition

Number of copies / phr

Low-density polyethylene (LDPE)

65

Ethylene-vinyl acetate copolymer (EVA)

35

Decabromodiphenylethane (DBDPE)

20

Talc powder (TP)

3

Modified antimony trioxide (M-Sb 2 o 3 )

4

Zinc borate (ZB)

8

Hydrotalcites (LDHs)

2

[0068] (3) Preparation method:

[0069] a. Raw material drying: Weigh the raw material according to the above ratio, then p...

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Abstract

The invention relates to an LDPE (Low-Density Polyethylene) / EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material. The LDPE / EVA anti-flaming material comprises the following raw material compositions by weight parts: A is base resin and includes 100 parts of LDPE and EVA; B is bromine containing flame retardant and includes 10-20 parts of decabromodiphenyl ethane or decabromodiphenyl ether, C is inorganic flame retardant and includes 3-6 parts of modified antimonous oxide M-Sb2O3, 3-6 parts of talcum powder TP, 2-8 parts of zinc borate (ZB) and 2-8 parts of hydrotalcite (LDHs). The preparation method of the LDPE / EVA anti-flaming material is as follows: drying raw materials, mixing the raw materials uniformly, processing, extruding, and conducting injection molding on the raw materials to obtain the extruded anti-flaming composite material. According to the anti-flaming material and the preparation method, the advantages of the organic flame retardant, the bromine containing flame retardant and the inorganic flame retardant are combined, the using amount of the inorganic flame retardant is decreased, the limit oxygen index of the anti-flaming composite material is increased, the materials are burned into carbon directly when being burned, the dropping phenomenon can not occur, and the toxic and harmful gas can not be generated.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an LDPE / EVA flame-retardant composite material and a preparation method thereof. Background technique [0002] LDPE has a wide range of uses due to its excellent physical and mechanical properties, electrical properties and chemical corrosion resistance, especially good processing properties. Due to the poor flame retardancy of LDPE (OI=17), it is difficult to greatly increase its antioxidant index (OI), and LDPE is a non-polar material, which is soluble in flame retardants with strong polarity. The polar parameters are very different, so it must be modified. The modification method is mainly to introduce polar groups, such as ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), etc., The purpose is to increase the filling amount of flame retardant. [0003] Ethylene-vinyl acetate copolymer EVA has good flexibility, toughness,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L31/04C08K13/06C08K9/04C08K3/22C08K3/34C08K3/38C08K5/03C08K5/06B29B7/00B29C47/92B29C45/77B29C45/78B29C48/92
CPCB29C48/92B29C2948/92514B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 陆增梦石建荣王松林马柳军韦华童张法王镇
Owner 广西华锑科技有限公司
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