Phenolic moulding plastic with high bending strength and preparation method thereof
A phenolic molding compound and flexural strength technology, applied in the manufacture of rayon, chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of inability to meet mechanical workpieces, brittle cracking, high brittleness, etc., and improve the performance of turning and milling. The effect of improving flexural strength, improving flexural strength and impact resistance
Active Publication Date: 2021-08-31
上海欧亚合成材料股份有限公司
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- Description
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- Application Information
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Problems solved by technology
However, due to the high brittleness of the phenolic resin after curing and cross-linking, when it is used for mechanical parts, it often involves dimensional changes and structural changes during use, which is prone to brittle fracture and cracks when turning and milling are required. gap, unable to meet the requirements of mechanical workpieces
Method used
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Examples
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preparation example 1
[0067] A silicon carbide modified polyacrylonitrile fiber, the components and their corresponding weights are shown in Table 1, and are prepared through the following steps:
[0068] a, ball mill polyacrylonitrile fiber, silicon carbide, polyvinylpyrrolidone and sodium lauryl sulfate for 3 hours at 280r / min to obtain a mixture;
[0069] b, after ultrasonically treating the mixture at a frequency of 28kHz for 15min, melt extruding and granulating to obtain a masterbatch;
[0070] c. Spinning the masterbatch to obtain silicon carbide modified polyacrylonitrile fibers, the diameter of the silicon carbide modified polyacrylonitrile fibers is 1-2 μm.
preparation example 2-5
[0072] A silicon carbide modified polyacrylonitrile fiber differs from Preparation Example 1 in that each component and its corresponding weight are shown in Table 1.
[0073] Each component and its weight (kg) in table 1 preparation example 1-5
[0074]
preparation example 6
[0076] A silicon carbide modified polyacrylonitrile fiber, the difference from Preparation Example 3 is that the polyacrylonitrile fiber is a special-shaped polyacrylonitrile fiber with a triangular cross section.
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Abstract
The invention relates to the technical field of phenolic moulding plastics, and particularly discloses a phenolic moulding plastic with high bending strength and a preparation method thereof. The phenolic moulding plastic with high bending strength comprises the following components in parts by weight: 15-30 parts of phenolic resin; 20-40 parts of a mineral filler; 1-2 parts of a coupling agent; 1-3 parts of a plasticizer; 1-2 parts of a lubricant; 3-8 parts of a curing agent; 0.2-0.4 part of a curing accelerator; and 10-20 parts of silicon carbide modified polyacrylonitrile fiber. The preparation method of the silicon carbide modified polyacrylonitrile fiber comprises the following steps: ball-milling polyacrylonitrile fiber, silicon carbide, polyvinylpyrrolidone and lauryl sodium sulfate to obtain a mixture; carrying out ultrasonic treatment on the mixture, and carrying out melt extrusion and granulation to obtain a master batch; and spinning the master batch to obtain the silicon carbide modified polyacrylonitrile fiber. The high-bending-strength phenolic moulding plastic has relatively good toughness, relatively high bending strength and excellent turn-milling machining performance.
Description
technical field [0001] The present application relates to the technical field of phenolic molding compound, more specifically, it relates to a high bending strength phenolic molding compound and a preparation method thereof. Background technique [0002] Phenolic molding compound is one of the three thermosetting plastics. It has the advantages of high mechanical strength, good heat resistance, oil resistance and chemical resistance, and is low in cost. It is widely used, especially suitable for household appliances, electrical accessories and mechanical accessories, etc. field. [0003] Phenolic molding compound is generally made of phenolic resin as binder, wood powder and mineral as filler, glass fiber as reinforcing fiber, plus curing agent and accelerator. However, due to the high brittleness of the phenolic resin after curing and cross-linking, when it is used for mechanical parts, it often involves dimensional changes and structural changes during use, which is prone...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08L61/06C08L33/20C08L9/02C08L77/00D01F6/54D01F1/10
CPCC08L61/06D01F6/54D01F1/10C08L2205/025C08L2205/035C08L2205/16C08L33/20C08L9/02C08L77/00
Inventor 沐霖杨小云王文浩朱永茂
Owner 上海欧亚合成材料股份有限公司