Halogen-free flame-retardant and low-odor polypropylene/layered double-hydroxide nanocomposite and preparation method thereof

A nanocomposite material and hydroxide technology, applied in the field of polypropylene/layered double hydroxide nanocomposite material and its preparation, can solve the research on flame retardancy of layered double hydroxide, dispersion inhomogeneous compatibility and other problems to achieve the effect of improving physical and chemical comprehensive properties, reducing odor and improving flame retardant properties

Inactive Publication Date: 2011-10-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The polymer / layered double hydroxide nanocomposite material and its preparation method proposed in the patent CN03131694.8 solve the problems of uneven dispersion and compatibility, but do not make any improvement on the flame retardancy of layered double hydroxides. special study

Method used

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  • Halogen-free flame-retardant and low-odor polypropylene/layered double-hydroxide nanocomposite and preparation method thereof
  • Halogen-free flame-retardant and low-odor polypropylene/layered double-hydroxide nanocomposite and preparation method thereof
  • Halogen-free flame-retardant and low-odor polypropylene/layered double-hydroxide nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1. Preparation of Nano Halogen Free Flame Retardant System

[0021] Zn(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O molar ratio n=3, metal ion total concentration is in the aqueous solution of the mixed salt of 0.4mol / L, add Al(NO 3 ) 3 9H 2 O total molar weight 1.2 times of 3-hydroxyphenyl phospho-propionic acid CEPPA, drip the mixed solution that weight concentration is 20%NaOH, to pH value is 9, in N 2 Under protection, stirred for 2h, aged at 60°C for 24h, then cooled, filtered, washed, and dried to obtain nano-CEPPA-intercalated Zn 3 Al / NO 3 -LDH nano-halogen free flame retardant system.

[0022] Step 2. Mix

[0023] 93 parts by weight of homopolypropylene and 3 parts by weight of the above-mentioned prepared nano-CEPPA intercalated Zn 3 The Al-LDH nano-halogen-free flame retardant system is mixed in a twin-screw extruder, the extrusion temperature is set at 180°C, the vacuum degree is -0.08Pa, and the speed of the main engine is 240r / min.

[0024] The...

Embodiment 2-6

[0026] The specific implementation steps are consistent with Example 1, the difference lies in different raw materials and parameter settings, see Table 1 and Table 2 for details. The performance test results are shown in Table 3.

[0027] Table 1 Preparation of nano-halogen-free flame retardant system (step 1)

[0028]

[0029] Table 2 Mixing (step 2)

[0030]

[0031] Note: the parts in the table refer to parts by weight

[0032] Table 3 Performance test results

[0033]

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Abstract

The invention relates to a halogen-free flame-retardant and low-odor polypropylene / layered double-hydroxide nanocomposite and a preparation method thereof. The halogen-free flame-retardant and low-odor polypropylene / layered double-hydroxide nanocomposite is characterized by comprising the following raw materials in percentage by weight (wt%): 70 to 99 of polypropylene and 1 to 30 of nano halogen-free flame-retardant system. The nano halogen-free flame-retardant system is a two-component nano halogen-free flame-retardant system of the layered double-hydroxide of the intercalation of 3-hydroxyphenyl phosphoroso-propanoic acid (CEPPA), which has an obviously synergistic flame-retardant effect. The material and the preparation method thereof have the characteristics of simple process, low cost, good flame-retardant effect, low odor and good mechanical property, and can be used in the industries of automobiles, construction, household electric appliances and the like.

Description

technical field [0001] The invention relates to the technical field of plastic modification, in particular to a polypropylene / layered double hydroxide nanocomposite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a kind of thermoplastic resin, which has rich sources of raw materials, low price, and good comprehensive performance. It has been increasingly widely used in industries such as automobiles, electrical appliances, daily necessities, furniture, packaging, and construction. However, polypropylene has poor flame retardancy and is easy to burn. Its limiting oxygen index (LOI) is 18.5, which belongs to flammable materials. It is prone to fire, and the flame spreads quickly and is not easy to extinguish, causing great harm to people's lives and property. The fields of application of unmodified polypropylene are therefore extremely limited. At present, most of the widely used polypropylenes are flame retardant modified. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L53/00C08K9/04
Inventor 丁鹏唐圣福施利毅宋娜杨慧
Owner SHANGHAI UNIV
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