Low-smoke halogen-free flame-retardant polypropylene material containing double hydroxide and preparation method thereof

A flame retardant polypropylene and hydroxide technology, applied in the field of flame retardant, can solve the problems of unexplained flame retardant effect, unexplained influence of LDHs flame retardant performance, etc., and achieves good flame retardant effect, improved mechanical properties, and improved mechanical properties. performance effect

Active Publication Date: 2017-01-11
扬州润丰塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are not many patents applying LDHs to polyolefin flame retardant modification. Patent CN03131694.8 discloses a preparation method of polymer and layered double hydroxide nanocomposite material, but does not explain its flame retardant effect; Patent CN201110306154.X discloses a halogen-free flame retardant polypropylene nanocomposite material, LDHs is part of the flame retardant used in it, but it does not explain the effect of modifying LDHs on flame retardant performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: First, 20kg of homopolymer PP (is placed in a high-speed mixer, slowly add 0.6kg of liquid paraffin while rotating at high speed, and after mixing evenly, add 8kg of modified LDHs, 6kg of modified APP, and 1kg of silicon-containing Compatibilizer, β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate and tris[2.4-di-tert-butylphenyl] phosphite total 80g (40g respectively ), take out after mixing evenly, and prepare for extrusion granulation.

[0037] Ø35 twin-screw extruder is used to extrude and granulate. The set temperature of each section is 160°C, 200°C, 210°C, 215°C, 215°C, 215°C, 215°C, 230°C, and the head temperature is 230°C. , the extrusion process screw speed is 200rpm. After drying, the obtained particles were injection-molded to obtain test specimens, and the mechanical properties and combustion properties were tested.

Embodiment 2

[0038] Example 2: First place 20kg of copolymerized PP in a high-speed mixer, slowly add 0.2kg of liquid paraffin while rotating at a high speed, and after mixing evenly, add 4kg of modified LDHs, 3kg of modified APP, and 0.4kg of silicon-containing compatible A total of 30g of antioxidant, antioxidant 1076 and antioxidant 168 were taken out after mixing evenly, ready for extrusion granulation.

[0039] Ø35 twin-screw extruder is used to extrude and granulate. The set temperature of each section is 140°C, 180°C, 190°C, 190°C, 190°C, 190°C, 190°C, 200°C, and the head temperature is 200°C. , the extrusion process screw speed is 150rpm. After drying, the obtained particles were injection-molded to obtain test specimens, and the mechanical properties and combustion properties were tested.

Embodiment 3

[0040] Example 3: First place 20kg of copolymerized PP in a high-speed mixer, slowly add 0.4kg of liquid paraffin while rotating at a high speed, and after mixing evenly, add 5kg of modified LDHs, 5kg of modified APP, and 0.8kg of silicon-containing compatible A total of 40g of antioxidant, antioxidant 1076 and antioxidant 168, after being mixed uniformly, take out and prepare for extrusion granulation.

[0041] Ø35 twin-screw extruder is used to extrude and granulate. The set temperature of each section is 140°C, 180°C, 190°C, 190°C, 190°C, 190°C, 190°C, 200°C, and the head temperature is 200°C. °C, the screw speed during extrusion is 150 rpm. After drying, the obtained particles were injection-molded to obtain test specimens, and the mechanical properties and combustion properties were tested.

[0042] The low-smoke, halogen-free, flame-retardant and propylene-retardant composite materials obtained in Examples 1-3 were subjected to mechanical performance tests, oxygen index...

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Abstract

The invention discloses a low-smoke halogen-free flame-retardant polypropylene material containing double hydroxide and a preparation method of the low-smoke halogen-free flame-retardant polypropylene material and belongs to the technical field of flame retardancy. The composite low-smoke halogen-free flame-retardant polypropylene material containing layered double hydroxide comprises 100 parts of polypropylene, 15-30 parts of modified ammonium polyphosphate, 20-40 parts of Mg-Al double hydroxide, 2-5 parts of silicon-containing compatilizer, 1-3 parts of liquid paraffin and 0.15-0.4 part of antioxidant. The invention further discloses a preparation method of the layered double hydroxide flame-retardant agent. The composite flame-retardant polypropylene material disclosed by the invention is free of halogen and has low smoke release when the composite flame-retardant polypropylene material is combusted. The composite flame-retardant polypropylene material has the advantages of good flame-retardant property and mechanical properties, simpleness in production process and low raw material cost and can be widely applicable to automotive and household appliance industries.

Description

technical field [0001] The invention discloses a layered double hydroxide low-smoke, halogen-free flame-retardant polypropylene composite material and a preparation method thereof. The specific content relates to the modification of layered double hydroxide and its compounding with ammonium polyphosphate in polypropylene, which belongs to the field of flame retardant technology. Background technique [0002] Polypropylene (PP) is one of the five most commonly used general-purpose plastics. Its raw materials are rich in sources, low in price, and have good heat resistance and mechanical properties. It has been widely used in the industry. However, pure unmodified PP is extremely flammable and has poor flame retardancy. Its limiting oxygen index (LO) is only 18.5%, which belongs to flammable grade. When it burns in case of fire, it has high calorific value and fast burning speed, and is accompanied by dripping phenomenon, which is not easy to extinguish, causing great harm t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08K13/06C08K9/02C08K3/28C08K9/10C08K3/32C08K5/01C08K5/134C08K5/526B29B9/06B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08L23/12C08L23/14C08L2201/02C08L2201/22C08L2205/035C08L2205/08C08L51/06C08L51/08C08L91/06C08K13/06C08K9/10C08K2003/323C08K9/04C08K2003/2224C08K2003/2227
Inventor 邹国享李锦春赵彩霞张鑫宋艳焦青伟
Owner 扬州润丰塑胶有限公司
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