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Heat-resistant halogen-free flame-retardant polylactic acid multi-element composite material and preparation method thereof

A composite material and polylactic acid technology, which is applied in the field of heat-resistant halogen-free flame-retardant polylactic acid multi-composite materials and their preparation, can solve the problems of substandard impact resistance, lack of compatibility, extrusion and puffing, and achieve improved toughness, Improved heat resistance and cost-effective effects

Inactive Publication Date: 2010-07-28
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, due to the lack of compatibility of the blending system or uneven dispersion, the production process has problems such as extrusion puffing, unsmooth pull bars, peeling on the surface of injection molded products, pearly luster, and substandard impact resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] Preparation of modified polylactic acid resin:

[0050] Dry the polylactic acid resin in a vacuum oven at 45°C for 3-4 hours, weigh the dried PLA resin, maleic anhydride and initiator dicumyl peroxide DCP, and the weight ratio of the three is 100:5:0.5 , and then mixed evenly, extruded and granulated by co-rotating twin-screw extruder. The processing technology of the co-rotating twin-screw extruder is as follows: the temperature of the first zone is 150-180°C, the temperature of the second zone is 150-180°C, the temperature of the third zone is 150-180°C, the temperature of the fourth zone is 150-180°C, the temperature of the head is 170, the host The rotational speed is 400 rpm.

Embodiment 1

[0052] A heat-resistant halogen-free flame-retardant polylactic acid multi-component composite material is made of the following raw materials in parts by weight:

[0053] 37.6 parts of modified polylactic acid resin; 45.0 parts of bisphenol A polycarbonate resin; 10.0 parts of polybutylene succinate; 0.5 parts of dicumyl peroxide; 0.1 parts of white oil; 4.9 parts of PX-2000; 0.1 part of ketone powder; 1 part of ethylene bis stearic acid amide; 0.2 part of tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester, tris(2,4 phosphite - 0.1 part of di-tert-butylphenyl) ester; 0.7 part of hydrolysis inhibitor (ADR-4370), 0.3 part of ultraviolet absorber (UV-5411).

[0054] The preparation of heat-resistant halogen-free flame-retardant polylactic acid multi-component composite material includes the following steps

[0055] a: first dry the modified polylactic acid resin in a vacuum oven at 45°C for 3 hours;

[0056] b: Mix the dried modified polylactic ...

Embodiment 2

[0060] Example 2, a heat-resistant halogen-free flame-retardant polylactic acid multi-component composite material, made of the following raw materials in parts by weight: 32.7 parts of modified polylactic acid resin; 28.0 parts of bisphenol A polycarbonate resin; 25.0 parts of butylene glycol esters; 0.2 parts of dicumyl peroxide; 0.2 parts of white oil; 10 parts of PX-200; 1 part of silicone powder; , 0.1 part of 5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 0.1 part of tris(2,4-di-tert-butylphenyl phosphite); 0.6 part of hydrolysis inhibitor (ADR-4370), 0.2 part of ultraviolet absorber (UV-5411).

[0061] The preparation of the heat-resistant halogen-free flame-retardant polylactic acid composite material comprises the following steps:

[0062] a: first dry the modified polylactic acid resin in a vacuum oven at 45°C for 4 hours;

[0063] b: Mix the dried modified polylactic acid resin and white oil in a high-speed mixer;

[0064] c: Mix the crosslin...

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Abstract

The invention discloses a heat-resistant halogen-free flame-retardant polylactic acid multi-element composite material and a preparation method thereof. The composite material is prepared from the following raw materials: modified polylactic resin, aromatic polycarbonate resin, aliphatic polyster resin, a cross-linking agent, a halogen-free flame retardant, white oil, a dispersing agent, an antioxygen, and a processing aid. The preparation method comprises the following steps: a, drying the modified polylactic resin; b, uniformly mixing the dried modified polylactic resin and the white oil; c, uniformly mixing the cross-linking agent and the dispersing agent; d, continuously mixing the halogen-free flame retardant, the antioxygen, the processing aid and the mixed materials in step b and step c; and e, putting the mixed material in step d into a twin-screw extruder, and performing melt extrusion for granulation. The invention provides a composite material having the advantages of heat resistance, flame retardancy and good impact resistance, and a method for preparing the composite material, which has the advantages of simple production process, convenient operation and low cost.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a heat-resistant halogen-free flame-retardant polylactic acid multi-component composite material and a preparation method thereof. Products formed from the composite material can be widely used in the fields of clothing, textiles, packaging, agriculture and forestry, medical and health care, and daily necessities. Background technique [0002] In the 21st century, when oil resources are increasingly tense and environmental pressure is prominent, many countries regard building a sustainable resource recycling society as one of their national policies, and vigorously developing biodegradable polymer materials with good environment has become a part of material development in the 21st century. Trend. [0003] Polylactic acid resin (PLA) is the only chemically synthesized biodegradable polymer material that uses renewable biological resources as raw materials. Renewable raw ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L69/00C08L67/02C08K5/49C08K5/54C08K5/14B29C47/92B29C48/92
CPCB29C48/04B29C48/405B29C48/9185B29C48/92B29C2948/92514B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904
Inventor 谢建达
Owner SHENZHEN KEJU NEW MATERIAL
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