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Unsaturated polyester resin fiber reinforced sheet-shape molding compound and preparation method thereof

A sheet molding compound, polyester resin technology, applied in the field of composite materials, can solve the problems of low tensile strength, bending strength and impact strength, poor mechanical properties, can not effectively meet application requirements, etc., to improve mechanical properties, shrink Insulation distance, excellent unidirectional high strength effect

Active Publication Date: 2016-04-13
SICHUAN D&F ELECTRICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a kind of unsaturated polyester resin fiber reinforced sheet molding compound and its preparation method, and solve the mechanical problems of traditional sheet molding compound in the current technology. Poor performance, low tensile strength, bending strength and impact strength, can not effectively meet the application requirements

Method used

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  • Unsaturated polyester resin fiber reinforced sheet-shape molding compound and preparation method thereof
  • Unsaturated polyester resin fiber reinforced sheet-shape molding compound and preparation method thereof

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preparation example Construction

[0032] Such as figure 1 Shown, a kind of unsaturated polyester resin fiber reinforced sheet molding compound preparation method is characterized in that, preparation step comprises:

[0033] A. Filler modification: Put the aluminum hydroxide powder into the high-speed mixer, spray one or more of silane coupling agent, aluminate coupling agent, and wetting and dispersing agent, and the speed of the high-speed mixer is 2000~ 4000r / min, keep mixing for 10-15min, the temperature rises to 125°C and keep warm for 10min, then pack into bags for later use to obtain the filler of modified aluminum hydroxide;

[0034] B. Preparation of resin paste: Add unsaturated polyester resin, low shrinkage agent, auxiliary agent, and curing agent into the mixing tank and stir evenly, then add filler, flame retardant synergist, thickener, release agent, reinforcement in step A Materials and colorants are dispersed at high speed, and the viscosity is controlled not to exceed 80,000 centipoise to obt...

Embodiment 1

[0038] Formula: 10-20 parts of phthalic resin, 5-10 parts of polystyrene low-shrinkage agent, 0.3 parts of tert-butyl peroxybenzoate, 1-2 parts of zinc stearate, 40-50 parts of aluminum hydroxide, BYK One part of wet dispersant 9010, 0.5 part of magnesium oxide, 30-60 parts of 1-inch alkali-free chopped glass fiber.

[0039] Process: According to the formula, add o-phthalic resin, polystyrene low shrinkage agent, BYK wetting and dispersing agent 9010, tert-butyl peroxybenzoate to disperse for 1-3min, add zinc stearate, hydroxide at 500-900r / min Aluminum 20min, add magnesium oxide 1200r / min to disperse for 3min. Put the uniformly dispersed resin paste into the upper and lower slots of the SMC unit, evenly scrape it on the polyethylene film that is loaded up and down, evenly sprinkle 1 inch chopped glass fiber on the resin paste, and send it into the pressure roller to press and soak , rewinding and sent to the aging room at 45°C, aging for 24-72 hours until it is not sticky an...

Embodiment 2

[0042] Formula: 10-20 parts of m-benzene resin, 5-10 parts of polystyrene low-shrinkage agent, 0.3 parts of tert-butyl peroxybenzoate, 1-2 parts of zinc stearate, 40-50 parts of aluminum hydroxide, MC resistance 2-8 parts of fuel, 1 part of BYK wetting and dispersing agent 9010, 0.5 parts of magnesium oxide, 30-60 parts of 1-inch alkali-free chopped glass fiber.

[0043] Process: According to the formula, add isophthalic resin, polystyrene low shrinkage agent, BYK wetting and dispersing agent 9010, tert-butyl peroxybenzoate to disperse for 1-3min, add zinc stearate, hydroxide at 500-900r / min Aluminum and MC flame retardant for 20 minutes, adding magnesium oxide 1200r / min to disperse for 3 minutes. Put the uniformly dispersed resin paste into the upper and lower slots of the SMC unit, evenly scrape it on the polyethylene film that is loaded up and down, evenly sprinkle 1 inch chopped glass fiber on the resin paste, and send it into the pressure roller to press and soak , rewin...

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Abstract

The invention discloses an unsaturated polyester resin fiber reinforced sheet-shape molding compound, comprising unsaturated polyester resin, a low shrinkage agent, a filler, a curing agent, a thickener, a mold release agent, a reinforcing material, a colorant and an additive. The unsaturated polyester resin is characterized by comprising one or more of o-phenylene resin, m-phenylene resin and vinyl ester resin in mixing; the filler is modified aluminium hydroxide; the reinforcing material is made of one or more selected from the group containing alkali-free chopped glass fiber, alkali-free untwisted continuous glass fiber rove, high silica glass fiber and Kevlar fiber. The molding compound combines light weight, high strength, retardance, corrosion resistance and insulation, has the advantages of high weight percentage of reinforced material, good electrical properties, significantly improved mechanical properties, tensile strength of not less than 100Mpa, bending strength of not less than 300Mpa, impact strength not less than 260 KJ / m<2>, dielectric strength of not less than 12KV / mm, flame retardance of UL94V-0 and product thickness of up to 60mm, and can be used for compression molding of electrical insulation structural parts.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an unsaturated polyester resin fiber reinforced sheet molding compound and a preparation method thereof. Background technique [0002] Sheet molding compound (SMC for short) is a dry sheet-like prepreg composed of unsaturated polyester resin, low-shrinkage additives, fillers, curing agents, thickeners, release agents and glass fibers. SMC has Superior electrical performance, corrosion resistance, light weight, easy and flexible engineering design, etc. Its mechanical properties can be compared with some metal materials, and it has advantages that metals cannot match, such as: light specific gravity, corrosion resistance, insulation, color In addition, this material also has many advantages such as high utilization rate, low production cost, mechanized continuous production, stable product quality, good operating environment and hygienic conditions, and strong designab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L25/06C08L31/04C08K13/04C08K7/14C08K5/098C08K3/22B29C70/50
CPCB29C70/504C08L67/06C08L2201/02C08L2205/03C08L25/06C08K13/04C08K7/14C08K5/098C08K2003/2227C08K2003/222C08L31/04
Inventor 黄辉志李仕文刘刚
Owner SICHUAN D&F ELECTRICAL TECH
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