Modified zinc borate and preparation method thereof
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A zinc borate and modification technology, applied in the field of flame retardant materials, can solve the problems of deterioration of mechanical properties of materials, less modification and application of zinc borate, and difficulty of uniform dispersion of materials, so as to reduce surface potential energy, improve mechanical properties and flame retardant. Performance, effect of narrow particle size distribution
Inactive Publication Date: 2017-01-11
SHANDONG CHUANJUN CHEM
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Problems solved by technology
[0003] However, the use of zinc borate has the following problems: on the one hand, zinc borate is an inorganic salt with a charge on the surface, hydrophilic and oleophobic, and it is difficult to disperse evenly in the material when it is blended with polymer materials, resulting in rapid deterioration of the mechanical properties of the material
At present, there are still few researches on the modification and application of zinc borate
Method used
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Embodiment 1
[0020] The modifier is made by mixing polydimethylsiloxane and silane coupling agent (KH550) at a mass ratio of 3:1.
[0021] Add 1061g boric acid to 2400g water, add 475g zinc oxide after dissolving, stir, keep stirring at 55°C for 30 minutes, then add 1.18g modifier, keep warm at 60°C for 6 hours, centrifuge while hot after the reaction, then add 50°C Wash twice with water, dry at 105°C, and pulverize to obtain modified zinc borate with a yield of 98.30%.
Embodiment 2
[0023] The modifier is made by mixing polydimethylsiloxane and silane coupling agent (KH550) at a mass ratio of 3:1.
[0024] Add 1080g boric acid to 2800g water, add 475g zinc oxide after dissolving, stir, keep stirring at 55°C for 30 minutes, then add 2.38g modifier, keep warm at 60°C for 6 hours, centrifuge while hot after the reaction, then add 50°C Wash twice with water, dry at 105°C, and pulverize to obtain modified zinc borate with a yield of 97.87%.
Embodiment 3
[0026] The modifier is made by mixing polydimethylsiloxane and silane coupling agent (KH550) at a mass ratio of 3:1.
[0027] Add 1080g boric acid to 2800g water, add 475g zinc oxide after dissolving, stir, keep stirring at 55°C for 30 minutes, then add 4.04g modifier, keep warm at 60°C for 6 hours, centrifuge while hot after the reaction, then add 50°C Wash twice with water, dry at 105°C, and pulverize to obtain modified zinc borate with a yield of 98.26%.
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Abstract
The invention belongs to the field of flame-retardant materials, and particularly relates to modified zinc borate prepared by taking dimethyl polysiloxane and a silane coupling agent as modifying agents and boric acid and zinc oxide as raw materials. According to the invention, a very good synergic effect can be achieved by simultaneously using the dimethyl polysiloxane and the silane coupling agent as the modifying agents, and the modified zinc borate and a high-molecular compound are more closely combined together, so that various mechanical properties of a material are further enhanced. The modified zinc borate disclosed by the invention is reduced in surface potential and improved in lipophilicity, enhanced in the dispersive capacity in a high-molecular material through surface modification; and the product is enhanced in fineness, high in dispersity and compatibility after the surface is subjected to modification treatment. The invention also provides a preparation method of the modified zinc borate. The preparation method disclosed by the invention is simple in process, achieves the productivity as high as more than 98.0%, easily obtains the raw material and is pollution-free and environment-friendly.
Description
technical field [0001] The invention belongs to the field of flame retardant materials, and in particular relates to a modified zinc borate and a preparation method thereof. Background technique [0002] Zinc borate is widely used in rubber and PVC, ABS, chlorinated polyethylene (CPE), chemical fiber, paint, paint, unsaturated resin. It has a good synergistic flame retardant effect with brominated flame retardants, aluminum hydroxide, magnesium hydroxide and intumescent flame retardants. It can replace toxic antimony trioxide in brominated flame retardant systems, and can also be used alone as a flame retardant. [0003] However, the use of zinc borate has the following problems: on the one hand, zinc borate is an inorganic salt with a charge on the surface, hydrophilic and oleophobic, and it is difficult to uniformly disperse in the material when blended with polymer materials, resulting in rapid deterioration of the mechanical properties of the material. On the other han...
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