Silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite and preparation method thereof

A technology of polyolefin foaming and composite materials, which is applied in the field of silane self-crosslinking halogen-free flame-retardant polyolefin foam composite materials and its preparation, which can solve the problems of lack of flame retardancy, poor aging resistance, and broken shrinkage cavities Distortion and other problems, to achieve the effect of uniform foaming, reduce potential hidden dangers, and improve temperature resistance

Active Publication Date: 2013-07-31
JIANGSU DEWEI ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous foamed LDPE has the disadvantages of relatively low heat resistance and poor aging resistance; it is easy to foam, crack, shrinkage and deformation at high temperature, and does not have flame retardant properties.

Method used

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  • Silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite and preparation method thereof
  • Silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite and preparation method thereof
  • Silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example provides a method for preparing a silane self-crosslinking halogen-free flame-retardant polyolefin foam composite material. The raw materials and dosages used are shown in Table 1, wherein:

[0031] In component A of grafting: the melt index of low-density polyethylene is 4g / 10min; the high-strength polyethylene resin is bimodal polyethylene, its melt index is 0.3g / 10min, and the melt strength is 35MPa; Polyethylene with an index of 20g / 10min; the silane crosslinking agent is vinyltrimethoxysilane, the grafting initiator is DCP, the first antioxidant is antioxidant 300, and the lubricant is PPA;

[0032] Catalytic component B: the VA content in ethylene-vinyl acetate copolymer is 28%; the melt index of low density polyethylene is 4g / 10min; the second antioxidant is antioxidant 1010; the crosslinking catalyst is dilauric acid di Butyl tin; the foaming aid is a mixture of azodicarbonamide and monoglyceride; the ultraviolet absorber is benzotriazole;

[0033]...

Embodiment 2

[0041] This example provides a method for preparing a silane self-crosslinking halogen-free flame-retardant polyolefin foam composite material. The raw materials and dosages used are shown in Table 1, wherein:

[0042] in:

[0043] In component A of grafting: low-density polyethylene has a melt index of 2g / 10min; high-strength polyethylene resin is metallocene polyethylene with a melt index of 3.5g / 10min and a tensile strength of 35MPa; Polyethylene with an index of 20g / 10min; the silane crosslinking agent is vinyltrimethoxysilane, the grafting initiator is DCP, the first antioxidant is antioxidant 300, and the lubricant is a fluorine-containing rheological agent;

[0044] Catalytic component B: the cross-linking catalyst is stannous octoate, the foaming aid is a mixture of N,N' dinitrosopentylene amide and monoglyceride, and the ultraviolet absorber is hindered amines;

[0045] In the halogen-free flame retardant masterbatch: the main flame retardant in the modified main fla...

Embodiment 3

[0048] This example provides a method for preparing a silane self-crosslinking halogen-free flame-retardant polyolefin foam composite material. The raw materials and dosages used are shown in Table 1, wherein:

[0049] In component A of grafting: low-density polyethylene is polyethylene with a melt index of 6g / 10min; high-flow polyethylene is polyethylene with a melt index of 50g / 10min; the silane crosslinking agent is vinyltrimethoxysilane, and the grafting initiator is 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, the first antioxidant is antioxidant 300;

[0050] In the catalytic component B: the foaming aid is a mixture of modified carbonate foaming aid and monoglyceride, and the ultraviolet absorber is benzophenone;

[0051] Halogen-free flame retardant masterbatch: The main flame retardant in the modified main flame retardant is a mixture of nitrogen-phosphorus flame retardants and magnesium hydroxide at a mass ratio of 1:0.5, and the modified main flame retardant is pre...

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Abstract

The invention relates to a silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite and a preparation method thereof. The composite comprises a grated component A, a catalytic component B and halogen-free flame retardant masterbatch according to a weight proportion of 100: (3-10): (10-60), wherein the grated component A comprises low-density polyethylene, high-strength polyethylene, high-flow polyethylene, a silane crosslinking agent, a grafting initiator, a first antioxidant, a lubricating agent and 3-aminopropyl trimethoxy silane; the catalytic component B comprises an ethylene-vinyl acetate copolymer, low-density polyethylene, a second antioxidant, a crosslinking catalyst, a foaming aid and an ultraviolet light absorber; and the halogen-free flame retardant masterbatch comprises an ethylene-octylene copolymer, a modified main flame retardant, an auxiliary flame retardant, zinc stearate and a third antioxidant. The silicane self-crosslinked halogen-free flame retardant polyolefin foamed composite has the characteristics of excellent flame retardance, low smoke and toxicity, uniformity in foaming, natural crosslinking property, high temperature resistance and the like.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polyolefin foam composite material and a preparation method thereof, in particular to a silane self-crosslinking halogen-free flame-retardant polyolefin foam composite material and a preparation method thereof. Background technique [0002] LDPE foamed plastics have excellent chemical, physical and mechanical properties. It is tough, flexible, wear-resistant, has excellent electrical insulation, heat insulation and chemical resistance, and is widely used in many fields such as packaging, chemical industry, construction, and cables. One of the improvement directions of LDPE foamed plastics is to develop closed-cell foam grades with softness, high flexibility, uniform cells, and small and dense cells. And the thermal insulation pipes of the water supply and drainage systems in the southern region are more and more widely used. The previous foamed LDPE has the disadvantages of relatively low heat r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L23/06C08L23/08C08K13/06C08K9/04C08K9/06C08K7/22C08K3/22C08K3/38C08J9/10C08J9/08C08J3/24C08J3/22C08F255/02B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 张丽本张芳芳栾珊珊陈敏王兴宁顾金云李小刚张玉平李善忠戴红兵张建耀周建明
Owner JIANGSU DEWEI ADVANCED MATERIALS
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