High-flame-retardancy high-flowability flaky molding compound and preparation method thereof

A sheet-like molding compound and high-flow technology, which is applied in the field of high-flame-retardant and high-flow sheet-like molding compound and its preparation, and the field of molding compound and its preparation, can solve the problems such as viscosity and fluidity of resin paste that are not involved, and can make up for mechanical Loss of properties, reduced viscosity, improved compaction and quality

Inactive Publication Date: 2017-01-04
陈小华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-flame-retardant and low-smoke sheet molding compound provided by this patent emphasizes smoke-free and is used for traffic i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] The present embodiment also provides a method for preparing a highly flame-retardant and high-flow sheet molding compound, comprising the following steps:

[0027] a. Weigh unsaturated polyester resin, low shrinkage agent, flame retardant filler, initiator, p-benzoquinone, internal mold release agent, viscosity reducing aid and styrene in a certain proportion, and mix thoroughly to obtain resin paste;

[0028] b. Mix the thickener with styrene to obtain a thickener paste;

[0029] c. Mix the resin paste and the thickener paste through the online mixing system of the SMC unit at the same time, and then go through the impregnation and compaction process with the chopped glass fiber to obtain the SMC sheet;

[0030] d. The SMC sheet is placed and aged at a certain temperature. After the pressed-in hardness reaches a certain range, it is molded under heating and pressure to obtain a high flame-retardant and high-flow sheet molding compound.

Example Embodiment

[0031] Example 1:

[0032] Prepare vinyl resin 36.8kg, high impact polystyrene 9.2kg, chopped E-glass fiber yarn size 25.4mm, 26kg, TBPB 0.56kg, 6.5% PBQ solution 0.4kg, styrene 2.3kg, stearin Zinc acid 2kg, 8μ aluminum hydroxide 42kg, 10μ aluminum hydroxide 25kg, 40% magnesium oxide paste 2.1kg, BYK996 0.3kg.

[0033] Weigh the above materials except the thickener paste in a certain proportion, and mix them thoroughly to obtain the resin paste. The viscosity of the resin paste reaches 88p; the resin paste and the thickener paste are mixed through the online mixing system of the SMC unit at the same time, and then mixed with The chopped glass fiber is impregnated and compacted to obtain SMC sheet; the SMC sheet is placed and aged at 40 °C, and after the indentation hardness reaches 304, it is molded at 140-150 °C to obtain high flame retardancy and high flow. Sheet molding compound, the sheet molding compound is vo-class flame retardant through flame retardant test.

Example Embodiment

[0034] Example 2

[0035] Prepare 20kg of m-phenylene resin, 30kg of vinyl resin, 9.2kg of high impact polystyrene, the size of chopped E-glass fiber yarn is 25.4mm, 36kg, TBPB 0.66kg, 6.5% PBQ solution 0.5kg, styrene 2.6kg , Zinc stearate 2kg, 6μ aluminum hydroxide 20kg, 8μ aluminum hydroxide 58kg, 40% magnesium hydroxide paste 2.5kg, BYK996 0.5kg.

[0036] Weigh the above materials except the thickener paste in a certain proportion, and mix them thoroughly to obtain the resin paste. The viscosity of the resin paste reaches 69p; the resin paste and the thickener paste are mixed through the online mixing system of the SMC unit at the same time, and then mixed with The chopped glass fibers are impregnated and compacted to obtain SMC sheets. The SMC sheet is placed and aged at 40 ° C. After the indentation hardness reaches 304, it is molded under the condition of 140-150 ° C to obtain a high flame retardant and high flow sheet molding compound. The sheet molding compound is vo ...

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Abstract

The invention relates to a high-flame-retardancy high-flowability flaky molding compound and a preparation method thereof, belonging to the field of chemical raw materials. The molding compound comprises the following substances in parts by mass: 15-30 parts of unsaturated polyester resin, 10-40 parts of glass fiber, 5-15 parts of low shrinkage agent, 30-60 parts of flame-retardant filler, 0.2-1 part of initiator, 0.02-0.1 part of para-benzoquinone, 0.2-1 part of thickener, 2-10 parts of styrene, 1-5 parts of internal molding lubricant and 0.1-0.5 part of viscosity breaking aid. The high-impact-resistance low shrinkage agent is adopted to make up for the loss of mechanical properties caused by the addition of the flame-retardant filler; the flame-retardant filler with different particle sizes performs the synergic filling functions to enhance the flame-retardant effect; and the viscosity breaking aid is utilized to lower the viscosity of the resin, thereby forming the high-flame-retardancy high-flowability flaky molding compound. The invention also provides a preparation method of the high-flame-retardancy high-flowability flaky molding compound.

Description

technical field [0001] The invention relates to a molding compound and a preparation method thereof, in particular to a high flame-retardant and high-flow sheet molding compound and a preparation method thereof, belonging to the field of chemical raw materials. Background technique [0002] Sheet molding compound is made of unsaturated polyester resin plus auxiliary materials such as a certain amount of thickener, filler, curing agent and accelerator, etc., and is pressed into a plate by an SMC press. It has been widely used in construction, Rail transit and bathroom market. With the increasingly stringent environmental protection regulations and safety regulations, developed countries in the world have issued a series of new flame retardant technical standards and regulations, such as the latest EU standard EN45545, American ASTM E84-06, the flame retardant of polymer materials and products Combustibility presents unprecedented requirements. Looking at these standards and...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L51/04C08L51/08C08K13/04C08K7/14C08K3/22C08K5/098
CPCC08L67/06C08L51/08C08L2201/02C08L2205/02C08L2205/03
Inventor 陈小华
Owner 陈小华
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