Low-smoke halogen-free flame-retardant B1-grade polyolefin cable sheath material and preparation method thereof
A technology of cable sheath material and polyolefin, which is applied in the direction of circuits, electrical components, plastic/resin/wax insulators, etc., can solve the problems of decreased mechanical properties of cable materials, large amount of inorganic flame retardants, and poor resin compatibility. Achieve the effect of improving compatibility, good barrier effect and high degree of crosslinking
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[0023] Example 1
[0024] A low-smoke, halogen-free, flame-retardant B1 polyolefin cable sheath material, comprising the following raw materials in parts by weight:
[0025] EVA resin 60, linear low density polyethylene 10, maleic anhydride grafted linear low density polyethylene 1, modified halloysite nanotubes 3, modified magnesium hydroxide 40, polyphenoxy diphenyl phosphate 3 , Antioxidant 1010 0.1, polyethylene wax 0.5.
[0026] Among them, the preparation method of modified halloysite nanotubes is:
[0027] S1. Disperse the halloysite nanotubes uniformly in absolute ethanol, then add ethyl orthosilicate and mix uniformly to obtain a mixed solution, and then add an aqueous solution of ammonium borate with a mass concentration of 1% under stirring conditions to the mixed solution Adjust the pH to 2 and react at 70°C for 3 hours to obtain a composite sol. The weight ratio of halloysite nanotubes, absolute ethanol, ethyl orthosilicate, and ammonium borate aqueous solution is 1:10:0...
Example Embodiment
[0034] Example 2
[0035] A low-smoke, halogen-free, flame-retardant B1 polyolefin cable sheath material, comprising the following raw materials in parts by weight:
[0036] EVA resin 80, linear low density polyethylene 20, maleic anhydride grafted linear low density polyethylene 3, modified halloysite nanotubes 5, modified magnesium hydroxide 60, polyphenoxy diphenyl phosphate 5 , Antioxidant 1010 0.15, Antioxidant 1680.05, Polyethylene wax 1.
[0037] Among them, the preparation method of modified halloysite nanotubes is:
[0038] S1. Disperse the halloysite nanotubes uniformly in absolute ethanol, then add ethyl orthosilicate and mix uniformly to obtain a mixed solution, and then add an aqueous solution of ammonium borate with a mass concentration of 1.5% under stirring conditions to the mixed In the solution, adjust the pH to 4 and react at 80°C for 5 hours to obtain a composite sol. The weight ratio of halloysite nanotubes, absolute ethanol, ethyl orthosilicate, and ammonium bor...
Example Embodiment
[0045] Example 3
[0046] A low-smoke, halogen-free, flame-retardant B1 polyolefin cable sheath material, comprising the following raw materials in parts by weight:
[0047] EVA resin 75, linear low-density polyethylene 15, maleic anhydride grafted linear low-density polyethylene 2, modified halloysite nanotubes 4.5, modified magnesium hydroxide 50, polyphenoxy diphenyl phosphate 2 , Polyphenoxy phosphoric acid-2-10-hydrogen-9-oxa-phosphaphenanthryl hydroquinone ester 2, antioxidant 168 0.1, antioxidant 1010 0.05, polyethylene wax 0.6.
[0048] Among them, the preparation method of modified halloysite nanotubes is:
[0049] S1. Disperse the halloysite nanotubes uniformly in absolute ethanol, then add ethyl orthosilicate and mix uniformly to obtain a mixed solution, and then add an aqueous solution of ammonium borate with a mass concentration of 1.2% to the mixed solution under stirring conditions Adjust the pH to 3 and react at 75°C for 4 hours to obtain a composite sol. The weight r...
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