CN-121991499-A - Flame-retardant thermoplastic resin composition, preparation method and application thereof

Abstract

The invention discloses a flame-retardant thermoplastic resin composition which comprises, by weight, 50 parts of thermoplastic resin, 7-24 parts of halogen-containing flame retardants and 0.5-6.5 parts of PPSU. The invention uses PPSU as anti-dripping agent to replace traditional polytetrafluoroethylene anti-dripping agent, which is suitable for preparing flame-retardant parts without PFAS substances, and solves the appearance defect that white spots are easy to appear on the surfaces of the parts when TPFE exists, and simultaneously improves the flame-retardant performance (reduces the burning time) of the composition.

Inventors

• JIANG ZHIQIANG
• QIU JIEDONG
• XIE MINGCHEN
• HE ZHENTAO
• WANG FENG
• JIANG SUJUN
• XU XIANJUN

Assignees

• 上海金发科技发展有限公司
• 金发科技股份有限公司
• 珠海万通特种工程塑料有限公司

Dates

Publication Date

20260508

Application Date

20241104

Claims (9)

1. 1. The flame-retardant thermoplastic resin composition is characterized by comprising the following components in parts by weight: 50 parts of thermoplastic resin; 7-24 parts of halogen-containing flame retardant; PPSU 0.5-6.5 parts.
2. 2. The flame retardant thermoplastic resin composition according to claim 1, wherein said thermoplastic resin is at least one selected from the group consisting of polyamide, polyester-based thermoplastic resin, styrene-based thermoplastic resin and polyolefin-based thermoplastic resin.
3. 3. The flame retardant thermoplastic resin composition according to claim 2, wherein said polyamide is at least one selected from the group consisting of aliphatic polyamide, semiaromatic polyamide and polylactam, said polyester-based thermoplastic resin is at least one selected from the group consisting of PC, PBT, PET, PCT, said styrene-based thermoplastic resin is at least one selected from the group consisting of ABS, HIPS, AS, PS, and said polyolefin-based thermoplastic resin is at least one selected from the group consisting of PP and PE.
4. 4. The flame retardant thermoplastic resin composition of claim 1, wherein said halogen-containing flame retardant is at least one selected from the group consisting of brominated polystyrene, polybrominated styrene, decabromodiphenylethane, brominated epoxy, and chlorinated polyethylene.
5. 5. The flame retardant thermoplastic resin composition of claim 1, wherein said PPSU is derived from structural units consisting of 4,4 '-dichlorodiphenyl sulfone and 4,4' -biphenol.
6. 6. The flame retardant thermoplastic resin composition of claim 1, wherein the PPSU has a melt index in the range of 10-80g/10min under test conditions of 365 ℃,5kg, preferably 20-50g/10min.
7. 7. The flame retardant thermoplastic resin composition according to claim 1, further comprising 0 to 50 parts by weight of a reinforcing filler selected from at least one of glass fiber, wollastonite, potassium titanate whisker, kaolin, mica, and 0 to 2 parts by weight of an additive selected from at least one of an antioxidant and a lubricant.
8. 8. The method for preparing the flame-retardant thermoplastic resin composition according to any one of claims 1 to 8, which is characterized by comprising the steps of uniformly mixing the components according to the proportion, and extruding and granulating by a double-screw extruder to obtain the flame-retardant thermoplastic resin composition.
9. 9. The application of PPSU as an anti-dripping agent in a flame-retardant thermoplastic composition is characterized by comprising, by weight, 50 parts of thermoplastic resin, 7-24 parts of halogen-containing flame retardant and 0.5-6.5 parts of PPSU.

Description

Flame-retardant thermoplastic resin composition, preparation method and application thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a flame-retardant thermoplastic resin composition, a preparation method and an application thereof. Background The anti-drip agents currently used in polymers are essentially entirely polytetrafluoroethylene-type anti-drip agents. Polytetrafluoroethylene, however, belongs to the class of PFAS materials, which have durability, long-range mobility, toxicity, and bioaccumulation. The relevant evidence suggests that PFAS causes global pollution to the environment, wild animals and humans, accumulates in the human body, constitutes a direct threat to human health, and that PFAS pollution is exacerbating the disruption of biodiversity. The health and environmental hazards of perfluorinated compounds have attracted extensive attention from international organizations, and more perfluorinated compounds are being incorporated or are about to be incorporated into regulatory control. Polytetrafluoroethylene belongs to PFAS list materials and is subject to curtailment in the future. Development of alternatives to this has become a necessary trend. Disclosure of Invention The flame-retardant thermoplastic resin composition comprises the following components in parts by weight: 50 parts of thermoplastic resin; 7-24 parts of halogen-containing flame retardant; PPSU 0.5-6.5 parts. The thermoplastic resin is at least one selected from polyamide, polyester thermoplastic resin, styrene thermoplastic resin and polyolefin thermoplastic resin. Experiments show that the PPSU content of the invention can be 0.8、1.0、1.2、1.4、1.6、1.8、2.0、2.2、2.4、2.6、2.8、3.0、3.2、3.4、3.6、3.8、4.0、4.2、4.4、4.6、4.8、5.0、5.2、5.4、5.6、5.8、6.0、6.2、6.4、6.5 parts and the like. The polyamide may be aliphatic polyamide, semiaromatic polyamide, polylactam, etc. The polyester-based thermoplastic resin may be PC, PBT, PET, PCT or the like. The styrene-based thermoplastic resin may be ABS, HIPS, AS, PS or the like. The polyolefin thermoplastic resin may be polypropylene, polyethylene, or the like. The halogen-containing flame retardant is at least one selected from brominated polystyrene, polybrominated styrene, decabromodiphenylethane, brominated epoxy and chlorinated polyethylene. The PPSU is derived from a structural unit formed by 4,4 '-dichloro diphenyl sulfone and 4,4' -biphenol. The melt index of the PPSU ranges from 10 g/10min to 80g/10min, and the test condition is 365 ℃ and 5kg, preferably 20 g/10min to 50g/10min. Test Standard ISO 1133-1:2022. 0-50 Parts of reinforcing filler can be selected according to actual conditions, wherein the reinforcing filler is at least one selected from glass fiber, wollastonite, potassium titanate whisker, kaolin and mica; or 0-2 parts of additive can be added according to actual conditions, and the additive is at least one selected from an antioxidant and a lubricant. The thermoplastic resin accounts for not less than 37% by weight of the total weight based on the total weight of the flame retardant thermoplastic resin composition of the present invention. The preparation method of the flame-retardant thermoplastic resin composition comprises the following steps of uniformly mixing all the components according to the proportion, and extruding and granulating by a double-screw extruder to obtain the flame-retardant thermoplastic resin composition. The use of a flame retardant thermoplastic resin composition for the preparation of flame retardant articles which do not contain PFAS type substances. The application of the PPSU as an anti-dripping agent in the flame-retardant thermoplastic composition comprises, by weight, 50 parts of thermoplastic resin, 7-24 parts of halogen-containing flame retardant and 0.5-6.5 parts of PPSU. The invention has the following beneficial effects: According to the invention, PPSU is added into the flame-retardant thermoplastic resin composition, a compact carbon layer is formed by using the PPSU which is easy to form carbon under the high-temperature combustion condition, and the high-temperature molten thermoplastic resin can be covered and used as an anti-dripping agent to replace the traditional polytetrafluoroethylene anti-dripping agent, so that the flame-retardant thermoplastic resin composition is suitable for preparing flame-retardant parts without PFAS substances, the appearance defect that white spots are easy to appear on the surfaces of the parts when TPFE exists is solved, and the flame-retardant performance of the composition can be improved (the combustion time is reduced). Detailed Description The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modificatio