Adhesive for cable shielding film and preparation method thereof

A cable shielding and adhesive technology, applied in the direction of adhesive types, polyurea/polyurethane adhesives, non-polymer adhesive additives, etc., can solve the problem that the shielding effect of the cable shielding film and the ductility of the adhesive layer cannot be guaranteed , poor flexibility, cable shielding film is stretched and easy to break, etc., to achieve high cross-linking degree, good flexibility and ductility, and ensure the effect of shielding effect

Inactive Publication Date: 2013-06-12
NANTONG GAOMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the poor ductility and flexibility of the glue layer, the adhesives currently used for shielding cable shielding films tend to cause the bonded cable shielding film to be stretched, easily broken, and cracked, and the cable shielding film cannot be guaranteed. The problem of shielding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides an adhesive for cable shielding film, which is used to bond the cable shielding film of shielded cables. 6%, 25-35% organic solvent, 0.3-0.8% gamma-glycidoxypropyltriethoxysilane as raw materials, the solid content synthesized after the reaction of each raw material is 65%-75%, and the viscosity is 2000mPa· s ~ 3500mPa·s, the hydroxyl value of 10 ~ 20mgKOH / g adhesive; specifically, polyester polyol, toluene diisocyanate, organic solvent reacted at 70 ~ 90 ℃ for 3 ~ 4 hours, adding γ-ring Oxypropoxypropyltriethoxysilane can be used to prepare an adhesive with a solid content of 65% to 75%, a viscosity of 2000mPa·s to 3500mPa·s, and a hydroxyl value of 10 to 20mgKOH / g.

[0043] Wherein, the polyester polyol is 25-35% of adipic acid, 30-40% of diethylene glycol, 15-25% of isophthalic acid, 15-25% of 1,2 propanediol in weight percent %, 2-5% trimethylolpropane as raw material, polyester polyol made after primary esterification, secondary esterifica...

Embodiment 2

[0062] This embodiment provides an adhesive for cable shielding film, which is used to bond the cable shielding film of a shielded cable. The adhesive is prepared according to the following steps, including:

[0063] (1) prepare polyester polyol, get and prepare each raw material of polyester polyol by following formula:

[0064] Raw material parts by mass

[0065] Adipic acid 28

[0066] Isophthalic acid 20

[0067] Diethylene glycol 32

[0068] 1,2 propylene glycol 16

[0069] Trimethylolpropane 4

[0070] The operation steps of preparing polyester polyol:

[0071] (1) primary esterification:

[0072] Add 28 parts by mass of adipic acid and 32 parts by mass of diethylene glycol into the polyester synthesis kettle, heat up to 210-230°C, and react for 2.5 hours; during the primary esterification process, keep the water output stable (outlet The amount of water accounts for 0.5 to 1.0% / hour of the total weight of each raw material in the primary esterification), and 6.9 ...

Embodiment 3

[0088] This embodiment provides an adhesive for cable shielding film, which is used to bond the cable shielding film of a shielded cable. The adhesive is prepared according to the following steps, including:

[0089] (1) prepare polyester polyol, get and prepare each raw material of polyester polyol by following formula:

[0090] Raw material parts by mass

[0091] Adipic acid 30

[0092] Isophthalic acid 18

[0093] Diethylene glycol 35

[0094] 1,2 propylene glycol 15

[0095] Trimethylolpropane 2

[0096] The operation steps of preparing polyester polyol:

[0097] (1) primary esterification:

[0098] Add 30 parts by mass of adipic acid and 35 parts by mass of diethylene glycol into the polyester synthesis kettle, raise the temperature to 210-230° C., and react for 3 hours. Keep the water output stable (0.5-1.0% hour), distilled water 7.3 parts by mass;

[0099] (2) Secondary esterification:

[0100] Add 18 mass parts of isophthalic acid, 15 mass parts of 1,2 propyl...

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Abstract

The invention discloses an adhesive for a cable shielding film and a preparation method thereof and belongs to the field of adhesive manufacture. The adhesive is synthesized by using polyester polyol, toluene diisocynate, an organic solvent and gamma-epoxy propoxy propyl triethoxysilane as the raw materials through performing a synthetic reaction on the raw materials and has solid content of 65 percent to 75 percent, viscosity of 2,000mPas to 3,500mPas and hydroxyl value of 10 to 20mgKOH / g, wherein the polyester polyol is prepared by using adipic acid, diethylene glycol, isophthalic acid, propanediol and trimethylolpropane as the raw materials through primary esterification, secondary esterification and condensation polymerization. The adhesive product has excellent flexibility and extensibility. Trimethylolpropane tri-functionality micromolecule alcohol is induced into the adhesive product. Due to the curing process, a polyurethane chain segment has higher crosslinking degree. The adhesive has the characteristics that the composite fastness is high, and no aluminium breaking and cracking phenomena is generated when the adhesive is stretched. The shielding effect of the cable shielding film is ensured.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to an adhesive for cable shielding films and a preparation method thereof. Background technique [0002] With the increase of the capacity of the power system and the continuous improvement of the automation level, the secondary equipment of the power system has widely used integrated circuit or microcomputer protection devices. The application of these protection devices plays a key role in improving the stable operation of the system. effect. But correspondingly, some new problems were also raised. For example, because microcomputer protection devices are composed of electronic components, single-chip microcomputers, etc., and belong to weak current equipment, and this protection device must operate in a high-voltage environment when used, this presents the problem of how to resist electromagnetic interference. The previous conventional electromagnetic protection devices are r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J11/06C08G18/42C08G63/672C08G63/78
Inventor 赫长生沈峰邓煜东
Owner NANTONG GAOMENG NEW MATERIAL
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