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High-toughness flame-retardant heat-resistant phenolic moulding plastic and preparation method thereof

A phenolic molding compound and high toughness technology, applied in the field of plastic raw materials, can solve the problems of flame retardancy and heat resistance that cannot meet the requirements of the coil skeleton, and achieve the effect of shortening the relative distance and high fluidity

Pending Publication Date: 2021-06-25
常熟东南塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardancy and heat resistance cannot meet the requirements of the coil skeleton industry.

Method used

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  • High-toughness flame-retardant heat-resistant phenolic moulding plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A) To prepare the base material, weigh 30 parts of acid-catalyzed novolac resin with a weight-average molecular weight greater than 20000 in parts by mass, and put 5 parts of acid-catalyzed novolac resin with a weight-average molecular weight between 600-1200 into the pulverizer Medium pulverization to obtain a powdery matrix material, using low molecular weight acid-catalyzed novolac resin to fill the vacant space generated when the high molecular weight acid-catalyzed novolac resin intertwines with each other, thereby improving the overall thermal stability and toughness of the matrix material;

[0033] B) To prepare the mixture, 3 parts of urotropine, 10 parts of alkali-free glass fiber, 4 parts of melamine cyanurate, 1 part of magnesium hydroxide, 2 parts of polyvinyl butyral, 1 part of activated magnesium oxide, 1 part of calcium stearate, 1 part of WE wax, 5 parts of light calcium carbonate, 15 parts of calcined kaolin, and the powdery or powdery base material obta...

Embodiment 2

[0038] A) To prepare the base material, weigh 28 parts of acid-catalyzed novolac resin with a weight average molecular weight greater than 20000 in parts by mass, and put 8 parts of acid-catalyzed novolac resin with a weight average molecular weight between 600-1200 into the pulverizer Medium pulverization to obtain a powdery matrix material, using low molecular weight acid-catalyzed novolac resin to fill the vacant space generated when the high molecular weight acid-catalyzed novolac resin intertwines with each other, thereby improving the overall thermal stability and toughness of the matrix material;

[0039] B) To prepare the mixture, 5 parts of urotropine, 15 parts of alkali-free glass fiber, 2 parts of melamine cyanurate, 8 parts of aluminum hydroxide, 2 parts of polyvinyl butyral, 2 parts of nitrile rubber, 1 part of activated magnesium oxide, 1 part of calcium hydroxide, 1 part of stearic acid, 1 part of ethylene bis stearamide, 10 parts of mica powder, together with th...

Embodiment 3

[0044] A) To prepare the base material, weigh 30 parts of acid-catalyzed novolac resin with a weight-average molecular weight greater than 20,000 in parts by mass, and put 10 parts of acid-catalyzed novolac resin with a weight-average molecular weight between 600-1200 into the pulverizer Medium pulverization to obtain a powdery matrix material, using low molecular weight acid-catalyzed novolac resin to fill the vacant space generated when the high molecular weight acid-catalyzed novolac resin intertwines with each other, thereby improving the overall thermal stability and toughness of the matrix material;

[0045] B) To prepare the mixture, weigh 6 parts of urotropine, 5 parts of alkali-free glass fiber, 3 parts of melamine cyanurate, 6 parts of hydroxide, 6 parts of magnesium hydroxide, polyvinyl alcohol 1 part of butyraldehyde, 3 parts of nitrile rubber, 1 part of activated magnesium oxide, 1 part of calcium hydroxide, 2 parts of stearic acid, 1 part of WE wax, 10 parts of mi...

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Abstract

The invention discloses a high-toughness flame-retardant heat-resistant phenolic moulding plastic and a preparation method thereof, and the high-toughness flame-retardant heat-resistant phenolic moulding plastic comprises the following raw materials in parts by mass: 35-40 parts of acid-catalyzed linear phenolic resin, 3-6 parts of a curing agent, 5-15 parts of inorganic reinforced fibers, 5-15 parts of an environment-friendly flame retardant, 2-4 parts of a toughening agent, 1-2 parts of a curing accelerator, 2-3 parts of a release agent; and 10-20 parts of a heat-resistant inorganic filler; and the acid-catalyzed linear phenolic resin is prepared by compounding an acid-catalyzed linear phenolic resin with the average molecular weight of more than 20000 and an acid-catalyzed linear phenolic resin with the average molecular weight of 600-1200. Through the mode, the heat stability and toughness of the matrix material formed by the phenolic resin can be improved, so that the technological requirements of small-sized component processing on the phenolic moulding plastic are met on the basis of adding corresponding auxiliary materials.

Description

technical field [0001] The invention relates to the field of plastic raw materials, in particular to a high-toughness flame-retardant and heat-resistant phenolic molding compound and a preparation method thereof. Background technique [0002] The raw material for making coil skeletons in small electronic components used in some IT industries is generally phenolic plastics. Due to the miniaturization of the product, the wall thickness of the product design is very thin, even less than 0.2mm. In addition, the parts also need to go through deburring, pin insertion, 480°C high-temperature tinning, welding and other processes during the processing process. Among them, the deburring and pin insertion processes have higher requirements on product toughness, otherwise the breakage rate of parts will be higher when the wall thickness is thinner. Therefore, the toughness of the material must be greatly improved to increase the fracture strain of the material. At the same time, in or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L29/14C08L9/02C08K7/14C08K5/3492C08K3/22C08K3/26C08K3/34C08K13/04
CPCC08L61/06C08L2201/02C08L2201/08C08K2003/265C08K2003/2227C08K2003/2224C08L2205/025C08L2205/03C08L2205/035C08L29/14C08L9/02C08K7/14C08K5/34928C08K3/22C08K3/26C08K3/34C08K3/346C08K13/04
Inventor 唐轶雯杨犁新周凯荣胡家斌陈晓丹崔惠民
Owner 常熟东南塑料有限公司