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Low smoke halogen-free environment-protection fire-retardation type sheet molding compound and preparation method thereof

A sheet molding compound, flame-retardant technology, applied in the direction of coating, etc., can solve the problems of high smoke generation and strong corrosion, the comprehensive mechanical properties of sheet molding compound and the decline of surface quality, secondary hazards, etc., to achieve excellent Mechanical properties, solving the effect of high combustion smoke density and reducing combustion smoke density

Inactive Publication Date: 2013-02-27
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, halogen flame retardants will have high smoke and strong corrosion in their application, which will cause "secondary hazards"
Especially in recent years, people have paid more attention to fire safety. In order to prevent the generation of toxic and harmful gases during fires, halogenated flame retardants are no longer suitable for application in sheet molding compounds; although adding inorganic flame retardants can improve the performance of sheet molding compounds. Excellent flame retardant properties and reduce the emission of toxic gases, but adding a large amount of inorganic flame retardants will lead to a significant decline in the comprehensive mechanical properties and surface quality of sheet molding compounds

Method used

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  • Low smoke halogen-free environment-protection fire-retardation type sheet molding compound and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: The sheet molding compound of the present invention, its components are selected in parts by mass, 60 parts of unsaturated polyester resin, 40 parts of polystyrene slurry, 1.5 parts of initiator, 3 parts of thickener, polymerization inhibitor 0.03 parts, 8 parts of release agent, 60 parts of filler, 80 parts of aluminum hydroxide, 5 parts of silicone synergist, 3 parts of smoke suppressant, 15 parts of novolac resin, 50 parts of glass fiber, 10 parts of basalt fiber, first Grind the unsaturated polyester resin and novolak resin in a three-roll mill, and disperse the novolac resin uniformly in the resin; then grind the resin, smoke suppressant, silicone synergist, initiator, polymerization inhibitor Add the agent and release agent into the batching kettle and stir at 400 rpm for 5 minutes; add filler calcium carbonate and aluminum hydroxide to the batching kettle and stir vigorously at 800 rpm for 15 minutes; finally add the thickener and stir evenly ; The ...

Embodiment 2

[0027] Embodiment 2: The sheet molding compound of the present invention, its component by mass parts, selects 60 parts of unsaturated polyester resin, 40 parts of polystyrene slurry, 1.5 parts of initiator, 3 parts of thickener, polymerization inhibitor 0.04 parts, 9 parts of mold release agent, 60 parts of filler, 100 parts of aluminum hydroxide, 5 parts of silicone synergist, 4 parts of smoke suppressant, 20 parts of novolac resin, 50 parts of glass fiber, and 10 parts of basalt fiber. Grind the unsaturated polyester resin and novolak resin in a three-roll mill, and disperse the novolac resin uniformly in the resin; then grind the resin, smoke suppressant, silicone synergist, initiator, polymerization inhibitor Add the agent and release agent into the batching kettle and stir at 400 rpm for 5 minutes; add filler calcium carbonate and aluminum hydroxide to the batching kettle and stir vigorously at 800 rpm for 15 minutes; finally add the thickener and stir evenly ; The prepa...

Embodiment 3

[0028] Embodiment 3: The sheet molding compound of the present invention, its component by mass parts, selects 60 parts of unsaturated polyester resins, 40 parts of polystyrene slurry, 1.5 parts of initiators, 3 parts of thickeners, polymerization inhibitors 0.06 parts, 9 parts of release agent, 60 parts of filler, 100 parts of aluminum hydroxide, 8 parts of silicone synergist, 5 parts of smoke suppressant, 20 parts of novolac resin, 60 parts of glass fiber, 20 parts of basalt fiber, first Grind the unsaturated polyester resin and novolak resin in a three-roll mill, and disperse the novolac resin uniformly in the resin; then grind the resin, smoke suppressant, silicone synergist, initiator, polymerization inhibitor Add the agent and release agent into the batching kettle and stir at 400 rpm for 5 minutes; add filler calcium carbonate and aluminum hydroxide to the batching kettle and stir vigorously at 800 rpm for 15 minutes; finally add the thickener and stir evenly ; The prep...

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Abstract

The present invention discloses a low smoke halogen-free environment-protection fire-retardation type sheet molding compound, which comprises, by weight, 60-80 parts of an unsaturated polyester resin mixture, 20-60 parts of a thermoplastic high molecule polymer slurry, 1-3 parts of an initiator, 2-4 parts of a thickener, 0.02-0.5 part of a polymerization inhibitor, 5-15 parts of a mold release agent, 90-140 parts of a filler, 80-150 parts of aluminum hydroxide powder, 1-10 parts of an organosilicon synergist, 1-8 parts of a smoke suppressant, 5-25 parts of a liner phenol formaldehyde resin, and 80-200 parts of reinforcing fibers. Compared with the conventional fire retardation agent, the low smoke halogen-free environment-protection fire-retardation type sheet molding compound has the following advantages that: a fire retardation performance of the composite material is increased, smoke density during burning is reduced, excellent mechanical properties of the material is maintained, and disadvantages of large smoke density during burning and low comprehensive mechanical performance of the existing fire-retardation sheet molding compound are solved.

Description

technical field [0001] The invention relates to a sheet molding compound, more precisely, a low-smoke, halogen-free, environment-friendly, flame-retardant sheet molding compound and a preparation method thereof. Background technique [0002] Sheet Molding Compound (Sheet Molding Compound, SMC) is a mixture of unsaturated polyester resin, thickener, initiator, crosslinking agent, filler, release agent, colorant, etc. into a resin paste impregnated with glass fiber roving or glass Fiber felt, and molded material formed by covering both sides with polyethylene or polypropylene film. As a rapidly developing molding compound, SMC has the advantages of high degree of mechanization, high production efficiency, stable product quality, high utilization rate of raw materials, low production cost, and smooth product surface. However, there are a large number of combustible organic compounds ( Unsaturated polyester resin, etc.), is easy to burn and produces thick smoke and poisonous ga...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L51/00C08L61/06C08K13/06C08K9/06C08K3/22C08K7/10C08K7/14C08K7/06C08K3/34C08K3/24C08J7/04C08L23/06
Inventor 刘春林成文俊吴盾陶国良何越江
Owner CHANGZHOU UNIV
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