Self-lubricating wear-resisting unsaturated polyester molding compound and preparation method thereof

An unsaturated, self-lubricating technology, applied in the field of thermosetting molding compounds, can solve the problems of less graphite addition, graphite is easy to conduct electricity, and the electrical properties of molding compounds are reduced, achieving good results, improving mechanical properties, and low wear.

Active Publication Date: 2012-06-20
桂林金格电工电子材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Since liquid unsaturated polyester resin is used, low-shrinkage additives must be added to the formula to reduce the curing shrinkage of liquid unsaturated polyester resin, and low-shrinkage additives are dissolved in styrene monomers during production Added to the liquid unsaturated polyester resin, and due to the volatile characteristics of styrene, the above-mentioned unsaturated polyester molding compound has short storage time of materials in the production process and the shortage of endangering the health of operators;
[0004] 2. The lubricant used is colloidal graphite powder. Since the graphite itself is black-gray, the unsaturated polyester molding compound prepared is all black-gray, and the color cannot be adjusted as needed;
[0005] 3. The amount of graphite added is small, and the self-lubricating effect of the unsaturated polyester molding compound produced is not good; when the amount is increased, the self-lubricating effect is significantly increased, but graphite is easy to conduct electricity, which will greatly reduce the electrical properties of the molding compound
[0006] 4. This kind of unsaturated polyester molding compound has the disadvantage of narrow application range of molding processing, and is generally only suitable for molding or transfer molding
The molding compound provided by the invention is solid unsaturated polyester resin and does not contain styrene, so it is odorless and can protect the health of workers; the dielectric strength of this molding compound is greater than 12 (MV / m), Heat distortion temperature greater than 200°C, curing shrinkage rate 0.4-0.6%, bending strength 60-80MPa, bending modulus 15-18GPa, notched impact strength 2-3KJ / m 2 , but the molding compound is not self-lubricating

Method used

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  • Self-lubricating wear-resisting unsaturated polyester molding compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1. Formula

[0057] 25 parts of ortho-phthalic unsaturated polyester resins with a softening point of 85°C;

[0058] 3.5 parts of triallyl cyanurate;

[0059] 0.4 parts of tert-butyl peroxybenzoate;

[0060] 0.01 parts of hydroquinone;

[0061] 2.2 parts of zinc stearate;

[0062] 10 parts of antimony trioxide;

[0063] 19 parts of triphenyl phosphate;

[0064] 18 parts of alkali-free glass fibers with a diameter of 15 μm and a length of 10 μm;

[0065] 10 parts of aramid fibers with a diameter of 15 μm and a length of 10 μm;

[0066] 10 parts of polytetrafluoroethylene powder with a particle size of 50 μm;

[0067] Iron red 1.5 parts.

[0068] 2. Preparation method:

[0069] Weigh the above-mentioned components according to the formula, put them into a dry powder high-speed mixer, mix them evenly, and refine them through a parallel twin-screw extruder. Send it into a single-screw granulator for granulation. The temperature of the barrel of the single-screw gr...

Embodiment 2

[0086] 1. Formula:

[0087] 28 parts of isophthalic unsaturated polyester resin with a softening point of 90°C;

[0088] 4.5 parts of divinylbenzene;

[0089] 1.5 parts of tert-butyl peroxy-2-ethylhexanoate;

[0090] 0.03 parts of hydroquinone;

[0091] 2.5 parts of sodium stearate;

[0092] 31 parts of zinc borate;

[0093] 10 parts of alkali-free glass fibers with a diameter of 15 μm and a length of 10 μm;

[0094] 12 parts of polyester fibers with a diameter of 20 μm and a length of 6 μm;

[0095] 10 parts of polyamide powder with a particle size of 30 μm;

[0096] 0.3 parts of titanium cyanide blue.

[0097] 2. Preparation method:

[0098] Weigh the above-mentioned components according to the formula, put them into a dry powder high-speed mixer, and after mixing evenly, they are refined by a parallel twin-screw extruder. Send it into a single-screw granulator for granulation. The temperature of the barrel of the single-screw granulator is controlled at 90-105°C to...

Embodiment 3

[0114] 1. Formula

[0115] 14 parts of o-phthalic unsaturated polyester resin with a softening point of 95°C;

[0116] 18 parts of m-xylene unsaturated polyester resin whose softening point is 88°C;

[0117] 2.5 parts of methyl methacrylate;

[0118] 2.5 parts of vinyl toluene;

[0119] 1.65 parts of 1,1-bis(tert-butylperoxy)cyclohexane;

[0120] 0.03 parts of tert-butylhydroquinone;

[0121] 2.5 parts of sodium stearate;

[0122] 12 parts of aluminum hydroxide;

[0123] 18 parts of magnesium hydroxide;

[0124] 10 parts of alkali-free glass fibers with a diameter of 25 μm and a length of 6 μm;

[0125] 6 parts of hemp fibers with a diameter of 15 μm and a length of 12 μm;

[0126] 6 parts of polyoxymethylene powder with a particle size of 100 μm;

[0127] 6 parts of polyamideimide powder with a particle size of 80 μm;

[0128] 0.5 part of permanent yellow.

[0129] 2. Preparation method

[0130] Weigh the above-mentioned components according to the formula, put th...

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Abstract

The invention discloses a self-lubricating wear-resisting unsaturated polyester molding compound and a preparation method thereof. The self-lubricating wear-resisting unsaturated polyester molding compound consists of the following components in parts by weight: 25-35 parts of solid unsaturated polyester resin, 2.5-6 parts of a crosslinking agent, 0.3-2 parts of an initiator, 0.01-0.05 part of a polymerization inhibitor, 2-3 parts of an inner demolding agent, 25-35 parts of a flame retardant, 15-30 parts of a reinforced material, 10-15 parts of an organic lubricating agent and 0-2 parts of a pigment, wherein the solid unsaturated polyester resin is any one or a combination of more than two of o-phenylene unsaturated polyester resin, m-phenylene unsaturated polyester resin, m-xylene unsaturated polyester resin and bisphenol A type unsaturated polyester resin; and the organic lubricating agent is any one or a combination of more than two of polytetrafluoroethylene powder, polyamide powder, polyformaldehyde powder and polyamide-imide powder. Compared with the prior art, the unsaturated polyester molding compound has the advantages of low wear loss and high mechanical and electric properties.

Description

technical field [0001] The invention relates to the technical field of thermosetting molding compounds, in particular to a self-lubricating wear-resistant unsaturated polyester molding compound and a preparation method thereof. Background technique [0002] As a kind of thermosetting material, unsaturated polyester molding compound is widely used in electrical insulation of home appliance control devices, electrical connectors, circuit breakers, switches, etc. due to its excellent weather resistance, mechanical properties, electrical insulation, and simple molding and processing. Structural components and occasions with high mechanical and electrical performance requirements. The traditional unsaturated polyester molding compound is made of liquid unsaturated polyester resin, low shrinkage agent and other necessary components. When ordinary unsaturated polyester molding compound is applied to the moving parts of electrical products, since ordinary unsaturated polyester mold...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08L27/18C08L77/00C08L59/00C08L79/08C08K13/06C08K5/098C08K3/22C08K5/523C08K7/14C08K3/38
Inventor 王明军钟意刘建文周缄
Owner 桂林金格电工电子材料科技有限公司
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