Compounding process for DMC low shrinking polyester reinforced moulding material

A technology of low-shrinkage polyester and batching technology, which is applied in the field of electrical flame-retardant insulation device production. It can solve the problems of easy volatilization, high packaging requirements, and difficult storage, and achieve loose storage conditions, reduce production costs, and smooth and smooth surfaces. Effect

Inactive Publication Date: 2008-06-04
李刚
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Styrene is easy to volatilize, polymerize at high temperature, not easy to store, and has high requirements for packaging. In the summer when the temperature is high, if it is left for a few days, polymerization may occur, and styrene will agglomerate and lose its use function.
For small and medium-sized enterprises, due to the small scale of production, material preparation is a headache. If there is too much styrene material, if it is not used up within a few days, it may aggregate and agglomerate and cause waste. If there is less material, it will delay production. It is also a very troublesome thing for the chemical material supply station to purchase only a small amount of styrene each time

Method used

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Embodiment 1

[0008] Embodiment 1, a kind of relatively complete specific embodiment scheme of the present invention is as follows:

[0009] The compounding process of DMC low-shrinkage polyester reinforced molding compound in this embodiment: first prepare the low-shrinkage agent, and determine the quantity of the prepared low-shrinkage agent according to the amount of production tasks. Take polystyrene pellets and toluene, according to the weight ratio of 1:3, pour it into a closed stirring reactor at normal temperature and stir fully, and after 8-10 hours, obtain a low-shrinkage agent-polystyrene toluene solution. Then prepare the flame retardant insulating mass of DMC low shrinkage polyester reinforced molding compound according to the proportion of ingredients. The specific weight ratio is: 20% unsaturated polyester resin, 0.4% initiator, polystyrene toluene solution with a weight ratio of 1:3 10%, 5% of 8-10 mm long glass fiber, 5% of 2-5 mm long ceramic short fiber, 6% of flame retar...

Embodiment 2

[0011] Embodiment 2, a kind of relatively complete specific embodiment scheme of the present invention is as follows:

[0012] The DMC low-shrinkage polyester reinforced molding compound compounding process of this embodiment: first prepare the low-shrinkage agent, and determine the amount of polystyrene toluene solution to be prepared according to the amount of production tasks. Take polystyrene pellets and toluene, according to the weight ratio of 1:4, pour it into a closed stirring reactor at normal temperature and stir thoroughly, and after 6-8 hours, obtain a low shrinkage agent-polystyrene toluene solution. Then prepare the flame retardant insulating group of DMC low shrinkage polyester reinforced molding compound according to the proportion of ingredients, the specific weight ratio is: 25% unsaturated polyester resin, 0.4% initiator, polystyrene toluene with a weight ratio of 1:4 12% of solution, 6.5% of 6-8mm long glass fiber, 6.5% of 1-3mm long ceramic short fiber, 6%...

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Abstract

The present invention discloses a kind of compounding process of DMC low shrinkage polyester molding material reinforced with glass fiber and ceramic fiber for fireproof and insulating electric device. The in-situ compounded DMC low shrinkage polyester molding material features its low shrinkage agent of styrene, which is prepared with polystyrene and toluene in certain ratio and through reaction at normal temperature inside a sealed reaction kettle, and the plastic intensifier comprising glass fiber and ceramic fiber in the equal ratio.

Description

technical field [0001] The invention relates to a DMC low-shrinkage polyester reinforced molding compound compounding process, which belongs to the production field of electrical flame-retardant insulating devices using glass fiber reinforced molding compound as raw materials. In electrical flame-retardant insulation devices, the most commonly used materials include DMC low-shrinkage polyester reinforced molding compound. Its commonly used formulation components are: unsaturated polyester resin, low-shrinkage agent, flame retardant, reinforcing material, internal mold release Agents, fillers, thickeners, etc. Background technique [0002] In the actual production process of electrical flame-retardant insulation devices, it is necessary to mix on-site ingredients according to the output ratio, how many products are produced, and how much flame-retardant insulation materials are prepared. The low shrinkage agent used in the ingredients is usually styrene, the reinforcing mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/09C08J5/04C08K7/14C08L67/04C08K3/08
Inventor 李刚
Owner 李刚
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