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Hydrotalcite flame-retardant polypropylene (PP) composite material and preparation method thereof.

A technology of flame retardant polypropylene and composite materials, applied in the field of polypropylene modification, can solve the problems affecting the application of flame retardant polypropylene, unstable flame retardant performance, reduced gloss of products, etc., achieving low specific gravity, good gloss, improved gloss, The effect of maintaining gloss

Inactive Publication Date: 2011-06-29
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordinary flame-retardant polypropylene material has low gloss and unstable flame-retardant performance, which limits its application in the housing of household appliances with high surface aesthetic requirements.
[0003] Currently on the market, talcum powder is generally used to enhance the flame-retardant stability of flame-retardant polypropylene, but the amount added is generally more than 10 parts. Although the larger the amount added, the flame-retardant polypropylene will be better and more stable. However, with the increase of the number of additions, the gloss of the product will be greatly reduced, and the specific gravity will be increased, which affects the application of flame-retardant polypropylene in some appearance parts with high requirements.

Method used

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  • Hydrotalcite flame-retardant polypropylene (PP) composite material and preparation method thereof.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0027] The polypropylene is homopolypropylene imported from South Korea; the compatibilizer is commercially available maleic anhydride grafted polypropylene, the flame retardant is commercially available decabromodiphenylethane and antimony trioxide, and the antioxidant is CIBA The company's 168 and 1010 use calcium stearate as a lubricating and dispersing agent.

[0028] Product ratio 1-5 Table 1

[0029] raw material name

Example

1(wt%)

Example

2(wt%)

Example

3(wt%)

Example

4(wt%)

Example

5(wt%)

blank test

test

Homopolypropylene

65

64

66

63

60

69

Compatibilizer

3

3

3

6

6

3

Decabromodiphenylethane

16

18

18

16

18

18

Antimony trioxide

8

9

9

8

9

9

Hydrotalcite

7

5

3

6

6

0

1010 / 168(1∶1)

0.5

0.5

0.5

0.5

0.5

0.5

Calcium steara...

Embodiment 6

[0036] A preparation method of a hydrotalcite flame-retardant polypropylene composite material, the method comprising the following steps:

[0037] (1) Taking raw materials by weight percentage: polypropylene (PP) 74kg, melt index is 100g / 10min, grafting ratio is 1% maleic anhydride grafted polypropylene 5kg, weight ratio is 2: 1 decabromo 10kg of the mixture of diphenylethane and antimony trioxide, 10kg of hydrotalcite, 0.25kg of antioxidant (1010), 0.25kg of antioxidant (168), 0.5kg of barium stearate;

[0038] Described hydrotalcite is the flame retardant stabilizer of composite material, and its chemical composition is [MII 1-xMIIIx(OH) 2 ]x+(An - ) x / n mH 2 O, where MII is the divalent metal cation Mg 2+ ; MIII is a trivalent metal cation Al 3+ ; An- is the anion CO 3 2- , x is 0.22, n is 4, and m is 4.

[0039] (2) Put polypropylene, compatibilizer, flame retardant, hydrotalcite, antioxidant, lubricating dispersant into the high mixer and mix for 5 minutes;

[0...

Embodiment 7

[0043]A preparation method of a hydrotalcite flame-retardant polypropylene composite material, the method comprising the following steps:

[0044] (1) Taking raw materials by weight percentage: polypropylene (PP) 85%, melt index is 150g / 10min, grafting ratio is 2% maleic anhydride grafted polypropylene 1kg, weight ratio is 2: 1 ten 12.8kg of the mixture of brominated diphenylethane and antimony trioxide, 1kg of hydrotalcite, 0.05kg of antioxidant (1010), 0.05kg of antioxidant (168), 0.1kg of zinc stearate;

[0045] Described hydrotalcite is the flame retardant stabilizer of composite material, and its chemical composition is [M II 1-xMIIIx (OH) 2 ]x+(An - ) x / n mH 2 O, where M II is a divalent metal cation Ni 2+ ; MIII is a trivalent metal cation Cr 3+ ; An- is the anion OH - , x is 0.3, n is 3, and m is 8.

[0046] (2) Put polypropylene, compatibilizer, flame retardant, hydrotalcite, antioxidant, lubricating dispersant into the high mixer in sequence and mix for 7 minu...

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Abstract

The invention relates to a hydrotalcite flame-retardant polypropylene (PP) composite material and a preparation method thereof. The material comprises the following components in percentage by weight: 50-85% of PP, 1-10% of compatilizer, 10-35% of flame retardant, 1-10% of hydrotalcite, 0.1-1% of antioxidant and 0.1-0.5% of lubricating-dispersing agent. The preparation method comprises the following steps: weighing raw materials based on the weight ratio; sequentially putting the PP, the compatilizer, the flame retardant, the hydrotalcite, the antioxidant and the lubricating-dispersing agent in a high-speed mixer, and mixing for 2-7 minutes; discharging; and placing the mixed raw materials in a double screw extruder, and carrying out extrusion and granulation at the temperature of 170-210 DEG C, wherein, the screw speed is maintained at 160-600RPM (revolutions per minute). Compared with the prior art, the obtained flame-retardant PP composite material has the advantages of good and stable flame-retardant effect, good glossiness, low specific gravity, good mechanical properties, simple processing technique, wide application range and high economic value.

Description

technical field [0001] The invention belongs to the technical field of polypropylene modification, and in particular relates to a hydrotalcite flame-retardant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is cheap, light, corrosion-resistant, has good processability, good mechanical balance, wide application range, and has good heat resistance among general-purpose resins. Polypropylene is widely used in household appliances and automobile industries, and its engineering tendency is very obvious. However, ordinary flame-retardant polypropylene materials have low gloss and unstable flame-retardant performance, which limits their application in household appliances with high aesthetic requirements. [0003] Currently on the market, talcum powder is generally used to enhance the flame-retardant stability of flame-retardant polypropylene, but the amount added is generally more than 10 parts. Although the larg...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08K13/02C08K3/22C08K5/03C08K3/34
Inventor 陈晓东蔡爽孟成铭项军
Owner SHANGHAI SUNNY
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