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Combined foaming polylactic acid heat-resistant flame-retardant modified material and preparation method of product

A technology for foaming polylactic acid and modified materials, which is applied in the field of preparation of combined foamed polylactic acid heat-resistant and flame-retardant modified materials and products, can solve the problems of high cost of polylactic acid, poor thermal stability and the like, and achieves high cost improvement. , The effect of improving flame retardant performance and expanding the scope of application

Active Publication Date: 2020-04-21
广州绿徽新材料研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Aiming at the problems existing in the prior art, the present invention provides a method for preparing foamed polylactic acid heat-resistant and flame-retardant modified materials and products. The degradable auxiliary material / polylactic acid prepared by melt blending and foam molding Composite foaming material can improve the mechanical properties, processing properties or functionalization of polylactic acid, without affecting its basic performance, it can improve the problems of high cost, brittleness and poor thermal stability of polylactic acid, and can maintain the original plasticity of PLA resin. On the basis of biodegradation function, it can effectively improve the comprehensive physical properties of composite materials and expand its application range

Method used

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  • Combined foaming polylactic acid heat-resistant flame-retardant modified material and preparation method of product
  • Combined foaming polylactic acid heat-resistant flame-retardant modified material and preparation method of product
  • Combined foaming polylactic acid heat-resistant flame-retardant modified material and preparation method of product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A method for preparing a combined foamed polylactic acid heat-resistant and flame-retardant modified material and product, comprising the following steps:

[0073] (1) Weigh 5 parts of polycaprolactone, 95 parts of polylactic acid resin and 1.5 parts of epoxy-functionalized ADR chain extender from BASF, Germany, and dry them at 60°C for 7 hours;

[0074] (2) The raw materials of step (1) and 8 parts of halloysite nanotube powder loaded with polyphosphoborosiloxane, 1 part of bis-tert-butylperoxycumene, oleic acid amide 0.5 parts, 0.5 parts of citrate, and 1.8 parts of calcium carbonate are mixed in a mixer, and the mixture is fed into a twin-screw extruder, wherein the temperature of each section of the twin-screw extruder is set to 130°C at the feed inlet, and the temperature of the other sections is sequentially 160°C, 175°C, 195°C, 210°C, 195°C, 170°C, screw length-to-diameter ratio 40, screw host speed 140rpm, realize reactive extrusion, and obtain polylactic acid f...

Embodiment 2

[0078] A method for preparing a combined foamed polylactic acid heat-resistant and flame-retardant modified material and product, comprising the following steps:

[0079] (1) Weigh 8 parts of starch, 92 parts of polylactic acid resin and 1.3 parts of epoxy-functionalized ADR chain extender from BASF, Germany, and dry them at 60°C for 7 hours;

[0080] (2) The raw materials of step (1) and 9 parts of halloysite nanotube powder loaded with polyphosphoborosiloxane, 1.5 parts of bis-tert-butylperoxycumene, erucamide 0.8 parts, 0.7 parts of glyceryl monostearate, 1.6 parts of talcum powder, and 0.4 parts of sorbitol nucleating agent are mixed in a mixer, and the mixture is added to a twin-screw extruder, wherein the temperature of each section of the twin-screw extruder is set The temperature of the feed inlet is 130°C, and the temperature of the other sections is 160°C, 175°C, 195°C, 210°C, 195°C, 170°C, the length-to-diameter ratio of the screw is 40, and the speed of the screw m...

Embodiment 3

[0084] A method for preparing a combined foamed polylactic acid heat-resistant and flame-retardant modified material and product, comprising the following steps:

[0085] (1) Weigh 10 parts of polyglycolic acid, 90 parts of polylactic acid resin and 1 part of BASF's epoxy-functional ADR chain extender by weight, and dry them at 60°C for 7 hours;

[0086] (2) Take the raw materials of step (1) and 10 parts by weight of halloysite nanotube powder loaded with polyphosphoborosiloxane, 2 parts of bis-tert-butylperoxycumene, stearic acid 1 part of amide, 0.9 part of pentaerythritol stearate, and 2.5 parts of sorbitol nucleating agent are mixed in a mixer, and the mixture is added to a twin-screw extruder, wherein the temperature of each section of the twin-screw extruder is set to The material inlet is 130°C, the temperature of the other sections is 160°C, 175°C, 195°C, 210°C, 195°C, 170°C in sequence, the length-to-diameter ratio of the screw is 40, and the speed of the screw main ...

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Abstract

The invention relates to a combined foaming polylactic acid heat-resistant flame-retardant modified material and a preparation method of a product, and belongs to the technical field of biodegradablefoaming materials. The preparation method comprises the following steps: weighing a flame retardant, a chain extender, a peroxide, a fatty acid amide compound refined from natural vegetable oil, a modifier, a degradable auxiliary material, polylactic resin and a nucleating agent in parts by weight; mixing the raw materials in a mixer according to the formula; melting, reacting and extruding the mixture in a twin-screw extruder at 160-210 DEG C to obtain polylactic acid flame-retardant modified masterbatch. The obtained polylactic acid flame-retardant modified masterbatch and a compound chemical foaming agent can be further mixed through various plastic processing modes, then a compound physical foaming agent is injected, and in cooperation with a supercritical fluid foaming agent conveyingdevice, the mixture is processed into the product in a large-scale mode. According to the technology, the foaming rate can be increased, the comprehensive performance of the foaming material is effectively improved, and the prepared foaming material and product have low apparent density and are widely applied to the fields of heat insulation, buffering and packaging.

Description

technical field [0001] The invention relates to a method for preparing a heat-resistant and flame-retardant modified material of combined foamed polylactic acid and a preparation method of a product, in particular to a method for preparing a heat-resistant and flame-resistant modified material of combined foamed polylactic acid and a product, which belongs to biodegradable foaming Material and product preparation technology field. Background technique [0002] Polylactic acid (PLA) foaming materials can replace petroleum-based foaming plastics in packaging and consumer goods. At the same time, the application of polylactic acid foaming materials is also restricted by two major problems: one is the shortcomings of room temperature brittleness, poor toughness, and poor thermal stability, which are manifested as products that cannot be used as cushioning materials due to poor impact toughness; The melting temperature of polylactic acid is only about 150°C, and the softening te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/20C08K5/14C08K3/22C08K5/11C08K3/26C08K3/34C08K13/02C08J9/12C08J9/10C08J9/08C08J9/06
CPCC08J9/06C08J9/08C08J9/103C08J9/122C08J2203/02C08J2203/04C08J2203/06C08J2203/08C08J2203/182C08J2203/184C08J2367/04C08J2467/04C08K3/34C08K5/11C08K5/14C08K13/02C08K2003/2227C08K2003/265
Inventor 谭卓华黄炜岚谭晓露
Owner 广州绿徽新材料研究院有限公司
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