Processing method of self-lubrication wear-proof unsaturated polyester molding compound

A processing method and unsaturated technology, which is applied in the processing field of self-lubricating wear-resistant unsaturated polyester molding compound, can solve the problem of reducing the curing shrinkage rate of liquid unsaturated polyester resin, reducing the electrical properties of unsaturated polyester molding compound, The color cannot be adjusted at will according to the needs, so as to improve the blending compatibility, promote uniform dispersion, and enhance the filling performance.

Inactive Publication Date: 2018-07-06
马斌祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN101265357 discloses a self-lubricating and wear-resistant bulk molding compound. The lubricant used is colloidal graphite powder. The unsaturated polyester molding compound has good self-lubrication and mechanical properties, but there are still the following deficiencies: first, 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 monomer and added to In the liquid unsaturated polyester resin, due to the volatile characteristics of styrene, the unsaturated polyester molding compound has the defects of short material storage time and polluting the processing environment during the production process; secondly, colloidal graphite powder is used as a lubricant, Since the graphite itself is black-gray, the unsaturated polyester molding compound produced is not black-gray, and the color cannot be adjusted as needed; moreover, the self-lubricating effect of the unsaturated polyester molding compound prepared when the amount of graphite added is not good, Although the self-lubricating effect is significantly improved when the graphite is added in a large amount, the electrical properties of the unsaturated polyester molding compound are greatly reduced because graphite is easy to conduct electricity; in addition, this kind of unsaturated polyester molding compound has a narrow processing range Disadvantages, generally only suitable for molding or transfer molding

Method used

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  • Processing method of self-lubrication wear-proof unsaturated polyester molding compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Batching: weigh each component according to the following proportioning ratio, and mix evenly through a high-speed mixer to obtain the material;

[0031] 40kg of o-phthalic unsaturated polyester resin with a softening point of 95°C, 10kg of kaolin, 5kg of C5 hydrogenated petroleum resin, 5kg of chlorinated polyethylene rubber, 5kg of lubricant polytetrafluoroethylene powder, 3kg of mold release agent zinc stearate, Crosslinking agent divinylbenzene 3kg, initiator tert-butyl peroxybenzoate 2kg, pigment iron red 0.5kg, polymerization inhibitor hydroquinone 0.05kg;

[0032] (2) Mixing: The mixed materials are quantitatively sent to the twin-screw mixer through the screw conveyor for mixing, and the mixing temperature is controlled at 120-130°C;

[0033] (3) Granulation: Send the mixed material into a screw extrusion granulator to extrude and granulate. The granulation temperature is controlled at 100-110°C. After natural cooling, screening, and packaging, it can be obt...

Embodiment 2

[0035] (1) Batching: weigh each component according to the following proportioning ratio, and mix evenly through a high-speed mixer to obtain the material;

[0036] 40kg of isophthalic unsaturated polyester resin with a softening point of 90°C, 10kg of kaolin, 5kg of C5 hydrogenated petroleum resin, 5kg of chlorinated polyethylene rubber, 5kg of lubricant polytetrafluoroethylene powder, 3kg of mold release agent zinc stearate, Crosslinking agent divinylbenzene 3kg, initiator tert-butyl peroxybenzoate 2kg, pigment iron red 0.5kg, polymerization inhibitor hydroquinone 0.05kg;

[0037] (2) Mixing: The mixed materials are quantitatively sent to the twin-screw mixer through the screw conveyor for mixing, and the mixing temperature is controlled at 120-130°C;

[0038] (3) Granulation: Send the mixed material into a screw extrusion granulator to extrude and granulate. The granulation temperature is controlled at 100-110°C. After natural cooling, screening, and packaging, it can be ob...

Embodiment 3

[0040] (1) Batching: weigh each component according to the following proportioning ratio, and mix evenly through a high-speed mixer to obtain the material;

[0041] 40kg of o-phthalic unsaturated polyester resin with a softening point of 95°C, 10kg of kaolin, 5kg of C5 hydrogenated petroleum resin, 5kg of chlorinated polyethylene rubber, 5kg of lubricant, 3kg of release agent zinc stearate, and crosslinking agent divinyl Benzene 3kg, initiator tert-butyl peroxybenzoate 2kg, pigment iron red 0.5kg, polymerization inhibitor hydroquinone 0.05kg;

[0042] (2) Mixing: The mixed materials are quantitatively sent to the twin-screw mixer through the screw conveyor for mixing, and the mixing temperature is controlled at 120-130°C;

[0043] (3) Granulation: Send the mixed material into a screw extrusion granulator to extrude and granulate. The granulation temperature is controlled at 100-110°C. After natural cooling, screening, and packaging, it can be obtained from lubrication resistan...

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Abstract

The invention discloses a processing method of a self-lubrication wear-proof unsaturated polyester molding compound and relates to the technical field of thermosetting molding compounds. The processing method comprises the following steps of: (1) batching, (2) mixing and (3) granulation. The method prepares the self-lubrication wear-proof unsaturated polyester molding compound by taking solid unsaturated polyester resin as a main material, kaoline as filling and C5 hydrogenated petroleum resin and chlorinated polyethylene rubber as forming assistants, a lubricant, a releasing agent, a cross-linking agent, an initiator, a pigment, a polymerization inhibitor as functional assistants, can significantly reduce a wear extent and therefore prolongs a service life when the molding compound is applied to a moving component of an electric appliance product.

Description

Technical field: [0001] The invention relates to the technical field of thermosetting molding compounds, in particular to a processing method of self-lubricating wear-resistant unsaturated polyester molding compounds. Background technique: [0002] As a 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 easy processing and molding. 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 it is applied to the moving parts of electrical products, because ordinary unsaturated polyester molding compound does not have Self-lubricating, easy to wear, thu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L57/02C08L23/28C08L27/18C08K5/098C08K3/22C08K3/34C08K13/06C08K9/04C08K7/00C08F283/01
Inventor 马斌祥
Owner 马斌祥
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