Flame retardant engineering plastic and preparation method thereof

A technology for engineering plastics and hyperbranched polymers is applied in the field of flame retardant engineering plastics and its preparation, and can solve the problems of easy decomposition, popularization and application, insufficient functional element content, and easy combustion of engineering plastics.

Active Publication Date: 2020-02-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, engineering plastics are flammable and easy to decompose at high temperatures, which limits their further application. Therefore, functional additives must be added to engineering plastics before molding to improve their flame retardancy, meet the use requirements, and reduce safety hazards.
Hyperbranched flame retardants have been used more and more widely in the field of polymer blending, but the structural characteristics of hyperbranched flame retardants themselves determine that their addition in the blending process of preparing engineering plastics cannot Higher than 10wt%, exceeding this amount will cause the viscosity of the blend to be too low, which is not conducive to molding processing
However, a lower amount of addition will lead to insufficient content of functional elements and poor flame retardancy

Method used

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  • Flame retardant engineering plastic and preparation method thereof
  • Flame retardant engineering plastic and preparation method thereof
  • Flame retardant engineering plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of flame-retardant engineering plastics, the specific steps are as follows:

[0047] (1) prepare metal-modified hyperbranched polymer;

[0048] (1.1) Using A 2 +B 3 The synthetic method prepares the hyperbranched polymer that terminal group contains carboxyl group: Wherein A 2 Is pyrazine-2,3-dicarboxylic acid; B 3 is 1,1,1-tris(hydroxymethyl)propane;

[0049] The prepared hyperbranched polymer molecule containing carboxyl groups in the end groups contains ester groups, the number of carboxyl groups accounts for 25% of the total amount of end groups, the degree of branching is 60%, and the weight average molecular weight is 2000g / mol;

[0050] (1.2) The end group containing carboxyl hyperbranched polymer is dissolved in chloroform to obtain a concentration of 0.7mol / L end group containing hyperbranched polymer solution, cobalt acetate is dissolved in deionized water to obtain a concentration of 0.8mol / L The metal ion solution of L;

[0051] ...

Embodiment 2

[0058] The preparation method of flame-retardant engineering plastics, the specific steps are as follows:

[0059] (1) prepare metal-modified hyperbranched polymer;

[0060] (1.1) Using A 2 +B 3 The synthetic method prepares the hyperbranched polymer that terminal group contains carboxyl group: Wherein A 2 For: 2-carboxyethylphenylphosphinic acid; B 3 For: three (2-carboxyethyl) isocyanurate;

[0061] The prepared hyperbranched polymer molecule containing carboxyl groups in the end groups contains ester groups, the number of carboxyl groups accounts for 27% of the total amount of end groups, the degree of branching is 53%, and the weight average molecular weight is 43000g / mol;

[0062] (1.2) the end group containing carboxyl hyperbranched polymer is dissolved in acetone to obtain a concentration of 0.85mol / L end group containing carboxyl hyperbranched polymer solution, nickel acetate is dissolved in deionized water to obtain a concentration of 0.95mol / L The metal ion solu...

Embodiment 3

[0070] The preparation method of flame-retardant engineering plastics, the specific steps are as follows:

[0071] (1) prepare metal-modified hyperbranched polymer;

[0072] (1.1) Using A 2 +B 3The synthetic method prepares the hyperbranched polymer that terminal group contains carboxyl group: Wherein A 2 For: 5-tert-butyl-1,3-benzenedicarboxylic acid; B 3 For: 2,4,5-trihydroxybutyrophenone;

[0073] The prepared hyperbranched polymer molecule containing carboxyl groups in the end groups contains ester groups, the number of carboxyl groups accounts for 25% of the total amount of end groups, the degree of branching is 30%, and the weight average molecular weight is 15000g / mol;

[0074] (1.2) the hyperbranched polymer solution containing carboxyl group in the end group is dissolved in N,N-dimethylformamide to obtain a concentration of hyperbranched polymer solution containing carboxyl group in the end group of 0.9mol / L, copper acetate is dissolved in A metal ion solution wi...

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Abstract

The invention relates to flame-retardant engineering plastics and a preparation method thereof. After ABS resin and a flexibilizer are uniformly mixed, a metal-modified hyperbranched polymer is added,and the mixture is uniformly mixed and then melted and granulated to obtain the flame-retardant engineering plastics, wherein the metal-modified hyperbranched polymer is a network polymer formed by crosslinking a carboxyl-terminated hyperbranched polymer and metal ions; and the network polymer has insoluble and infusible properties, is insoluble in most organic solvents below 80 DEG C and is infusible within the range of room temperature to T which is greater than or equal to 370 DEG C. The cross-linking is achieved by connecting oxygen atoms on a double bond inside carboxyl-terminated hyperbranched polymer molecules and the metal ions through a coordinate bond and connecting acid radical ions at the end of the carboxyl-terminated hyperbranched polymer molecules and the metal ions throughan ionic bond. The metal-modified hyperbranched polymer is uniformly dispersed in the obtained engineering plastics. The preparation method is simple and feasible, and the prepared engineering plastics have good flame retardant performance and excellent molding processing performance.

Description

technical field [0001] The invention belongs to the field of flame-retardant material preparation, and relates to a flame-retardant engineering plastic and a preparation method thereof. Background technique [0002] Engineering plastics can be used as engineering materials and plastics that replace metal manufacturing machine parts. They have excellent comprehensive properties such as high rigidity, low creep, high mechanical strength, good heat resistance and good electrical insulation, and they can be used in harsh environments. Long-term use in chemical and physical environments. Compared with general-purpose plastics, engineering plastics can meet higher requirements in terms of mechanical properties, durability, corrosion resistance, heat resistance and weight, and are more convenient to process and can replace metal materials as structural materials. Since the successful development of polyoxymethylene and polycarbonate in the late 1950s, engineering plastics have dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L55/02C08L9/02C08L87/00C08G83/00
CPCC08G83/005C08G83/006C08G83/008C08L55/02C08L2201/02C08L2205/025C08L2205/03C08L2205/06C08L9/02C08L87/00
Inventor 孙宾敖翔朱美芳吉亚丽相恒学杨升元刘林
Owner DONGHUA UNIV
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