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CN-116102856-B - High oil-grease-resistant thermoplastic polyester elastomer composite material and preparation method thereof

CN116102856BCN 116102856 BCN116102856 BCN 116102856BCN-116102856-B

Abstract

The invention discloses a high oil grease resistant thermoplastic polyester elastomer composite material and a preparation method thereof, wherein the composite material is prepared from, by weight, 80-95 parts of thermoplastic polyester elastomer, 5-20 parts of thermoplastic polyamide material, 0.3-2 parts of amide composite functional auxiliary agent, 0.3-2 parts of stearic acid additive, 0.5-2 parts of chain extender, 0.25-1 part of solvent and 0.6 part of antioxidant, wherein the amide composite functional auxiliary agent is a compound composed of oleic acid amide, erucic acid amide and fatty bisamide. The high oil-grease-resistant thermoplastic polyester elastomer composite material provided by the invention has good performance retention rate in a strong-polarity grease environment, so that the protective transmission shaft in the automotive field can be normally used in a high-temperature environment with grease erosion, and has the advantages of smaller noise and longer service life.

Inventors

  • HE XIAODONG
  • SUN GANGWEI

Assignees

  • 会通特种材料科技有限公司

Dates

Publication Date
20260505
Application Date
20230215

Claims (10)

  1. 1. The high oil grease resistant thermoplastic polyester elastomer composite material is characterized by being prepared from the following components in parts by weight: 80-95 parts of thermoplastic polyester elastomer, 5-20 Parts of thermoplastic polyamide material, 0.3 To 2 parts of amide compound functional auxiliary agent, 0.3-2 Parts of stearic acid additive, 0.5-2 Parts of chain extender, 0.25-1 Part of solvent, 0.6 Parts of antioxidant; the amide compound functional auxiliary agent is a compound composed of oleamide, erucamide and fatty bisamide; The preparation method of the Gao Naiyou-fat thermoplastic polyester elastomer composite material comprises the following steps: s1, dissolving a chain extender in a solvent to obtain a chain extender solution; s2, uniformly mixing the thermoplastic polyester elastomer, the thermoplastic polyamide material and the chain extender solution, adding an amide compound functional additive, a stearic acid additive and an antioxidant, and continuously uniformly mixing to obtain a mixture; And S3, adding the mixture in the step S2 into a double-screw extruder for extrusion granulation, and obtaining a target product.
  2. 2. The high oil and grease resistant thermoplastic polyester elastomer composite material according to claim 1, wherein the fatty bisamide is at least one of ethylene bis stearamide and ethylene bis oleamide.
  3. 3. The high oil and grease resistant thermoplastic polyester elastomer composite material according to claim 1, wherein the weight ratio of oleamide, erucamide and fatty bisamide is 3:5:2.
  4. 4. The high oil and grease resistant thermoplastic polyester elastomer composite material according to claim 1, wherein the stearic acid additive is at least one of stearic acid, zinc stearate, sodium stearate, aluminum distearate, glyceryl monostearate and dipentaerythritol stearate.
  5. 5. The high oil and grease resistant thermoplastic polyester elastomer composite according to claim 1, wherein the thermoplastic polyamide material is at least one of PA6, PA66, PA611, PA612, PA610, PA612, PA1010, PA1012, PA510, PA513, PA516, and PA 46.
  6. 6. The high oil and grease resistant thermoplastic polyester elastomer composite material according to claim 1, wherein the chain extender is at least one of an epoxy chain extender, an isocyanate chain extender and a compound containing diamino.
  7. 7. The high oil and grease resistant thermoplastic polyester elastomer composite according to claim 6, wherein the isocyanate chain extender is at least one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, carbodiimide modified MDI, polymethylene polyphenyl polyisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, cyclohexyldimethylene diisocyanate, and lysine diisocyanate.
  8. 8. The high oil and grease resistant thermoplastic polyester elastomer composite material according to claim 1, wherein the antioxidant is at least one of pentaerythritol dodecyl propyl ester, 4-bis (alpha, alpha-dimethylbenzyl) diphenylamine, bis (2, 4-di-tert-butylphenyl) pentaerythritol bisphosphite, tetrakis (beta- (3, 5-di-tert-butyl 4-hydroxyphenyl) propionate) pentaerythritol ester, tris [2, 4-di-tert-butylphenyl ] phosphite, N' -bis- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine, pentaerythritol distearyl phosphite, N-stearyl ester of (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, methyl tetra-methylene (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, bis [ ethyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ]2,2 oxamide, dioctadecyl tetraol bisphosphite.
  9. 9. The method for producing a high oil and grease resistant thermoplastic polyester elastomer composite as claimed in any one of claims 1 to 8, comprising the steps of: s1, dissolving a chain extender in a solvent to obtain a chain extender solution; s2, uniformly mixing the thermoplastic polyester elastomer, the thermoplastic polyamide material and the chain extender solution, adding an amide compound functional additive, a stearic acid additive and an antioxidant, and continuously uniformly mixing to obtain a mixture; And S3, adding the mixture in the step S2 into a double-screw extruder for extrusion granulation, and obtaining a target product.
  10. 10. The method for preparing a high oil and grease resistant thermoplastic polyester elastomer composite material according to claim 9, wherein the processing temperature of the twin-screw extruder is 180-240 ℃ and the screw rotating speed is 50-200r/min.

Description

High oil-grease-resistant thermoplastic polyester elastomer composite material and preparation method thereof Technical Field The invention belongs to the technical field of high polymer materials, and particularly relates to a high oil-grease-resistant thermoplastic polyester elastomer composite material and a preparation method thereof. Background Thermoplastic polyester elastomers refer to block copolymers containing hard polyester segments and soft polyether segments, abbreviated TPEE. TPEE has the elasticity of rubber and the strength of engineering plastic, soft segment gives it elasticity, making it resemble rubber, and hard segment gives it processability, making it resemble plastic. Compared with rubber, it has better processing property and longer service life, and compared with engineering plastics, it has the same high strength, better flexibility and dynamic mechanical property. TPEE has the characteristics of high strength, high elasticity, oil resistance, acid and alkali resistance, high temperature resistance, radiation resistance, excellent dynamic mechanical property and the like, and has a wide use temperature range of-50 ℃ to 180 ℃ and a hardness range of 25D to 80D. The purpose of the initial research and development of TPEE was to prepare highly elastic fibers for the textile industry. But TPEE is now an irreplaceable high-performance novel elastomer material and is widely applied to the fields of automobiles, electronics, electrics, railways and the like. In order to meet market demands and widen application fields, TPEE needs to be modified, and products such as heat resistance, flame retardance, glass fiber reinforcement, high strength, high transparency, high grease resistance, rubber texture and the like are developed. TPEE has good oil resistance to paraffinic oil and common oil, but loses oil resistance to special grease, particularly polar grease, under high temperature condition, while CN108603017A patent proposes grease resistance, but can not completely meet severe use environment in use, particularly grease resistance has greatly improved space, and has no noise reduction effect. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide the high oil-grease-resistant thermoplastic polyester elastomer composite material and the preparation method thereof, and the high oil-grease-resistant thermoplastic polyester elastomer composite material has good performance retention rate in a strong-polarity grease environment, so that the transmission shaft can be normally used in the automotive field under the high-temperature environment of grease erosion, and the high-grease-resistant thermoplastic polyester elastomer composite material has the advantages of smaller noise and longer service life. The aim of the invention is realized by the following technical scheme: the high oil grease resistant thermoplastic polyester elastomer composite material is prepared from the following components in parts by weight: Wherein: The thermoplastic polyamide material is at least one of PA6, PA66, PA611, PA612, PA610, PA612, PA1010, PA1012, PA510, PA513, PA516, PA46 and PA 612. The amide compound functional auxiliary agent is a compound composed of oleamide, erucamide and fatty bisamide. The fatty bisamide is at least one of ethylene bis-stearamide and ethylene bis-oleamide. Further, the weight ratio of oleamide to erucamide to fatty bisamide is 3:5:2. The stearic acid additive is at least one of stearic acid, zinc stearate, sodium stearate, aluminum distearate, glyceryl monostearate and dipentaerythritol stearate (PETS). The chain extender is at least one of epoxy chain extender, isocyanate chain extender and compound containing diamino. Further preferably, the epoxy chain extender is at least one of glycidyl ether type, glycidyl ester type, glycidyl amine type, aliphatic epoxy or alicyclic epoxy, and the isocyanate chain extender is Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), carbodiimide modified MDI (liquefied MDI), polymethylene polyphenyl polyisocyanate (PAPI), dicyclohexylmethane diisocyanate (HMDI), hexamethylene Diisocyanate (HDI), cyclohexyldimethylene diisocyanate (HXDI), lysine Diisocyanate (LDI), and the diamino-containing compound is 3,3 ' -dichloro-4, 4- ' -diaminodiphenylmethane or 1-amino-3-aminomethyl-3, 5-trimethylcyclohexane. The antioxidant is pentatetrol dodecyl thiopropyl ester412S), 4.4-bis (alpha, alpha-dimethylbenzyl) diphenylamine445 At least one of bis (2, 4-di-t-butylphenyl) pentaerythritol bisphosphite (ULTRANOX 627A), pentaerythritol tetrakis (beta- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate) (1010), tris [2, 4-di-t-butylphenyl ] phosphite (168), N' -bis- (3, 5-di-t-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine (1098), pentaerythritol distearyl phosphite (619), (3, 5-di-t-butyl-4-hydroxyphenyl) propionate N-stearyl alcohol ester, methyl tetrakis (3, 5-di-t-butyl-4-hydro