Halogen-free flame-retardant reinforced polyytrimethylene terephthalate composite material and preparation thereof
A technology of polybutylene terephthalate and composite materials, which is applied in the field of modified polyester, can solve the problems of flame retardant restrictions, PBT bromine residues, etc., achieve good rigidity, excellent mechanical properties, and meet performance requirements Effect
Inactive Publication Date: 2009-05-27
SHANGHAI SUNNY
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AI Technical Summary
Problems solved by technology
However, the PBT produced by the traditional flame retardant method has a lot of bromine residues. As people's awareness of environmental protection gradually increases, halogen-containing flame retardants are increasingly restricted.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1 and 2
[0025] Examples 1 and 2: PBT matrix resin, organic hypophosphite as flame retardant, and compatibilizer as ethylene-acrylate grafted glycidyl methacrylate.
[0026] Proportioning 1-2 (weight %) (table 1)
[0027] raw material name Matching ratio 1 Matching 2 PBT 58 45 Organic hypophosphite 18 20 Compatibilizer 3.5 4.5 E-glass fiber 20 30 Antioxidant is 1010 / 168(1:1) 0.5 0.5
[0028] Put the above components except the glass fiber into the high mixer according to the proportion and mix them for 4 minutes, then add the glass fiber and use the screw extruder to extrude and granulate. The processing temperature is:
[0029] a district Second District Third District Four districts five districts District six District Seven eight districts District 9 tenth district 230℃ 240℃ 250℃ 250℃ 250℃ 250℃ 250℃ 245℃ 245℃ 245℃
[0030] A kind of halogen-free flame retardant reinforced polybutylene ...
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Abstract
The invention relates to a halogen-free flame-retardant reinforced poly(butylene terephthalate) composite material, which is characterized in that the halogen-free flame-retardant reinforced poly(butylene terephthalate) composite material is prepared by mixing the following raw materials by weight percentage: 40 to 80 percent of PBT, 5 to 20 percent of halogen-free flame retardant, 1 to 10 percent of compatilizer, 10 to 40 percent of glass fibers and 0.1 to 1 percent of antioxidant. The method for preparing the halogen-free flame-retardant reinforced poly(butylene terephthalate) composite material comprises: weighing the raw materials according to the weight percentage; placing raw materials except the glass fibers into a high-speed mixer and mixing the raw materials for 2 to 5 minutes; discharging the mixed raw materials; and adding the glass fibers into the mixed raw materials and using a screw compressor for extrusion and granulation, wherein the rotating speed of the screw compressor is between 180 and 600 revolutions per minute, and the temperature is between 230 and 250 DEG C. The halogen-free flame-retardant reinforced poly(butylene terephthalate) composite material has the advantages that the halogen-free flame-retardant reinforced poly(butylene terephthalate) composite material has high-efficiency flame retardant property, good rigidity, high heat resistance and good dimensional stability, does not contain halogen, and is really environment-friendly and flame-retardant, and the flame retardant rating of the halogen-free flame-retardant reinforced poly(butylene terephthalate) composite material can reach V0 rating of the UL94 standard.
Description
technical field [0001] The invention relates to a halogen-free flame-retardant reinforced polybutylene terephthalate composite material and a preparation method thereof, in particular to an engineering material product suitable for high environmental protection requirements and injection molding with flame-retardant reinforcement requirements, suitable for processing low-pressure The invention relates to PBT modified materials for vacuum contactors, circuit breakers, low-voltage switches, thin-walled electronic and electrical components, etc., belonging to the technical field of modified polyester. technical background [0002] Polybutylene terephthalate (PBT) is a thermoplastic polyester obtained by copolymerization of polyterephthalic acid and butanediol. It has excellent mechanical properties, heat resistance and chemical resistance. The PBT material reinforced by glass fiber is also With good rigidity and dimensional stability, it is a new type of polyester material that...
Claims
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IPC IPC(8): C08L67/03C08K9/06B29B9/12C08L51/00C08K5/521C08K5/524
Inventor 柴振东陈晓东
Owner SHANGHAI SUNNY