Flame-retardant polylactic acid composition and foamed beads thereof

A technology of polylactic acid and composition, applied in the field of flame retardant lactic acid composition and its expanded beads, can solve the problem of poor flame retardant and antistatic properties, influence on molding applications, and control of cell morphology and expansion ratio. problems, etc.

Active Publication Date: 2019-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, existing polylactic acid and polylactic acid expanded beads (EPLA) prepared by it have poor flame retardancy and antistatic properties, and after flame-retardant and antistatic modification, the cell morphology and There is a problem with the control of the expansion ratio, which affects the subsequent molding application

Method used

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  • Flame-retardant polylactic acid composition and foamed beads thereof
  • Flame-retardant polylactic acid composition and foamed beads thereof
  • Flame-retardant polylactic acid composition and foamed beads thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] The raw material ratio and reaction conditions of the flame retardant, flame retardant polylactic acid composition and foamed beads prepared in this example are listed in Table 1 and Table 2, and Table 2 also lists the properties of the expanded beads parameter. In the table, flame retardant component A is phosphine oxide, flame retardant component B is a transition metal salt, and flame retardant component C is an inorganic flame retardant component.

[0113] (1) Preparation of flame retardant

[0114] Add 7 parts by weight of triphenylphosphine oxide and 3 parts by weight of cobalt nitrate into ethanol, stir at a rate of 100rpm, and then use microwave to heat the mixture under stirring. The heating power is 50W, the temperature is 40°C, and the reaction time is 4h. The material after microwave heating reaction is carried out supercritical drying, obtains the complex Co(OPPh of the formation of triphenylphosphine oxide and cobalt nitrate 3 ) 2 (NO 3 ) 2 .

[011...

Embodiment 2

[0135] (1) The preparation method of the flame retardant and (2) the preparation method of the carbon nanofiber antistatic agent are the same as in Example 1, except that the raw material formula and reaction conditions shown in Table 1 and Table 2 are the same. For example, the flame retardant formed in this embodiment is the complex Ni(OPOt) formed by trioctylphosphine oxide and nickel nitrate 3 )2 (NO 3 ) 2 .

[0136] (3) Preparation of polylactic acid base resin PLA102

[0137] The polylactic acid resin is prepared by the following method: in the presence of a catalyst, the cyclic dimer of lactic acid and aliphatic hydroxycarboxylic acid, such as the method of ring-opening polymerization of lactide and glycolide and ε-caprolactone (such as U.S. Patent No. 4 057, the preparation method disclosed in 537).

[0138] The lubricant is a PEG lubricant produced by Clariant, Switzerland, with a number average molecular weight of 10,000.

[0139] Take by weighing 100 parts by w...

Embodiment 3

[0151] (1) The preparation method of the flame retardant and (2) the preparation method of the carbon nanofiber antistatic agent are the same as in Example 1, except that the raw material formula and reaction conditions shown in Table 1 and Table 2 are the same. For example, the flame retardant formed in this embodiment is the complex Co(OPOt) formed by trioctylphosphine oxide and cobalt nitrate 3 ) 2 (NO 3 ) 2 .

[0152] (3) Preparation of polylactic acid base resin PLA103

[0153] The polylactic acid resin is prepared by the following method: a direct dehydration polycondensation method is applied to a mixture of lactic acid, aliphatic dibasic alcohol and aliphatic dibasic acid (such as the preparation method disclosed in US Patent No. 428126).

[0154] The lubricant is a PEG lubricant produced by Clariant, Switzerland, with a number average molecular weight of 10,000.

[0155] Take by weighing 100 parts by weight of the above-mentioned polylactic acid resin, then add a...

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Abstract

The invention provides a flame-retardant polylactic acid composition which comprises polylactic acid base resin, a flame retardant, a cell nucleating agent and an optionally selected antioxidant, wherein the flame retardant comprises a complex formed by phosphine oxide and a transition metal salt. The foamed beads prepared from the polylactic acid base resin provided by the invention are dense anduniform in cell, and a prepared foamed bead molded body has a very high compressive strength; meanwhile, when the flame-retardant polylactic acid composition provided by the invention is used in combination with a specific flame retardant and a specific antistatic agent, a synergistic effect is achieved between the flame retardant and the antistatic agent, and at the same time, the flame retardancy and the antistatic properties are improved. The foamed beads prepared from the flame-retardant polylactic acid composition provided by the invention have the characteristics of excellent high-temperature impact resistance, antistatic properties, flame retardancy, simple process, high closed cell ratio and controllable density.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a flame-retardant lactic acid composition and foamed beads thereof. Background technique [0002] As a fully biodegradable thermoplastic aliphatic polyester, polylactic acid (PLA) has the characteristics of non-irritating, non-toxic, good bioabsorption and compatibility, high mechanical strength and good processability. . PLA is mainly made of starch raw materials extracted from renewable plant resources (such as corn, palm, straw and other high cellulose). These starches are hydrolyzed to obtain glucose, and then fermented by certain strains to produce high-purity lactic acid, and then chemically synthesized to obtain polylactic acid with a certain molecular weight. Therefore, PLA has the dual advantages of resources and environment, and also has two characteristics of function and structural materials. The research, development and application of PLA ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K13/04C08K7/06C08K5/00C08K3/22C08J9/12
CPCC08J9/122C08J2203/06C08J2367/04C08J2467/02C08J2467/04C08K2003/2224C08K2003/2227C08K2201/011C08K2201/017C08L67/04C08L2201/02C08L2201/04C08L2201/22C08L2203/14C08L2205/025C08L2205/03C08K13/04C08K7/06C08K5/0091C08K3/22C08L67/02
Inventor 郭鹏吕明福张师军徐耀辉权慧宋文波白弈青
Owner CHINA PETROLEUM & CHEM CORP
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