Halogen-free sheet-like soft magnetic material adhesive, preparation method and halogen-free soft magnetic sheet

A technology of soft magnetic materials and adhesives, applied in the direction of inorganic material magnetism, adhesives, non-polymer adhesive additives, etc., to achieve strong magnetic properties, good economic and social benefits, and broad application prospects

Inactive Publication Date: 2015-10-28
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a halogen-free sheet-shaped soft magnetic material adhesive, a preparation method and a halogen-free soft magnetic sheet, which solves the halogen-containing problem of the sheet-shaped soft magnetic material adhesive and meets the requirements of environmental protection ROHs regulations

Method used

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  • Halogen-free sheet-like soft magnetic material adhesive, preparation method and halogen-free soft magnetic sheet
  • Halogen-free sheet-like soft magnetic material adhesive, preparation method and halogen-free soft magnetic sheet

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Embodiment Construction

[0020] The material components and the proportioning ratio of a kind of halogen-free flake soft magnetic material adhesive of the present invention are:

[0021] 5~30wt.% polyethylene, 70~95wt.% polyolefin copolymer, 0.1~2.0wt.% crosslinking agent, 0.1~1.0wt.% antioxidant.

[0022] The preferred material composition and ratio are: polyethylene 5-25wt.%, polyolefin copolymer 72-90wt.%, crosslinking agent 0.2-1.0wt.%, antioxidant 0.1-0.5wt.%.

[0023] Described polyethylene is high-density polyethylene, low-density polyethylene, linear low-density polyethylene.

[0024] The polyolefin copolymer is one or two of ethylene-propylene copolymer, ethylene-octene copolymer and ethylene-vinyl acetate copolymer.

[0025] The crosslinking agent is one of dibenzoyl peroxide, dilauroyl peroxide, dicumyl peroxide and di-tert-butyl hexane peroxide.

[0026] Described antioxidant is a kind of in 1010,1076,1135, BHT antioxidant.

[0027] The preparation method steps of the halogen-free flake...

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Abstract

The invention provides a bond made from a halogen-free sheet soft magnetic material, a preparation method thereof and a halogen-free soft magnetic sheet. The bond comprises the following components in percentage by weight: 5-30wt% of polyethylene, 70-95wt% of polyolefin copolymers as well as 0.1-2.0wt% of crosslinking agent and 0.1-1.0wt% of antioxygen. The preparation method of the bond comprises the following steps of: 1) adding the components in proportion into a mixer and uniformly mixing; 2) in an intermeshing co-rotating twin screw set, extruding an infused bar by virtue of a melt extrusion reaction grafting technology; 3) cooling with cooling water at a normal temperature, and then slicing and drying to obtain polyolefin elastomer bond particles. The halogen-free soft magnetic sheet provided by the invention is prepared through the following steps: physically mixing 5-12wt% of the polyolefin elastomer bond, 84-92wt% of neodymium iron boron magnetic powder or ferrite magnetic powder, 0.2-3wt% of non-orthophthalic plasticizer and 0.1-3wt% of titanate coupler; banburying, crushing, screening, rolling, polishing by virtue of UV (Ultraviolet), magnetizing and tailoring to prepare the environmentally-friendly halogen-free soft magnetic sheet which conforms to the requirements on environmentally-friendly ROHs (Restriction of the use of certain Hazardous Substances) regulations.

Description

technical field [0001] The invention relates to a halogen-free sheet-shaped soft magnetic material adhesive, a preparation method and a halogen-free soft magnetic sheet, belonging to the field of magnetic materials. Background technique [0002] At present, chlorinated polyethylene (CPE) is mainly used as the adhesive for sheet-shaped soft magnetic materials, which contains halogen and does not meet the requirements of environmental protection ROHs regulations. CN101981152A introduces hot melt adhesives as adhesive compositions, adhesive sheets and adhesive moldings. It is characterized in that it contains a mixture of hot-melt adhesives and strong magnets, and the shearing force after heating (150°C, 10 minutes) for bonding is more than 20N. Among them, the hot-melt adhesive is a polyester resin-based or polyolefin-based hot-melt adhesive, and examples of the polyolefin-based hot-melt adhesive include propylene-ethylene-butene-1 copolymer, ethylene- Vinyl acetate copolyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J123/08C09J123/06C09J11/06C08G81/00B29B9/06B29C47/92H01F7/02H01F1/33B29C48/92
CPCB29C47/92B29C47/0021B29C48/08B29C48/40B29C48/92
Inventor 严海彪
Owner HUBEI UNIV OF TECH
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