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Low mouth die accumulated material polyolefin alloy thermoplastic elastomer and manufacturing method thereof

A thermoplastic elastomer and polyolefin technology, used in the field of thermoplastic elastomers, can solve the problems of high EPDM viscosity, affecting the appearance of products, melt fracture, etc., to reduce die accumulation, reduce melt fracture, and reduce mold release inflated effect

Inactive Publication Date: 2019-09-20
江苏金陵奥普特高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing TPV technology, because of the high viscosity of EPDM, causes TPV material to rub against the die when it is extruded, forming die deposits
At the same time, because the polymer material will swell from the mold during the extrusion process, resulting in melt fracture, and then resulting in die deposits
When extruding the product, if there is a lot of die deposit, it will adhere to the surface of the extruded product and affect the appearance of the product.

Method used

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  • Low mouth die accumulated material polyolefin alloy thermoplastic elastomer and manufacturing method thereof
  • Low mouth die accumulated material polyolefin alloy thermoplastic elastomer and manufacturing method thereof
  • Low mouth die accumulated material polyolefin alloy thermoplastic elastomer and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 40-50 parts of EPDM, 30-40 parts of white oil, 20-25 parts of PP, 0.5 parts of PPA, 1 part of silicone masterbatch, 0.5 parts of lubricant, 0.5 parts of DCP, 1 part of TAIC, 1,2 polybutylene Alkene, 0.3 parts of antioxidant.

[0032] 1. After weighing EPDM and PP on an electronic balance according to the above formula, put them into a low-speed stirring pot, add antioxidant and lubricant at the same time, and stir for 3 minutes.

[0033] 2. Put the mixture evenly stirred in 1 into a twin-screw extruder with an aspect ratio of 56, rotate at a speed of 300 rpm, and plasticize at a temperature of 190°C, and granulate to form a premix.

[0034] 3. Add the cross-linking agent DCP, high-activity co-cross-linking agent TAIC and low-activity co-cross-linking agent 1,2-polybutadiene weighed according to the above formula, and PPA powder, silicone masterbatch into the high-speed stirring pot 500 -600rpm, mixing for 3min.

[0035] 4. Put the mixture obtained in 3 into a twin-scr...

Embodiment 2

[0037] 40-50 parts of EPDM, 20-30 parts of white oil, 30-35 parts of PP, 0.5 parts of PPA, 1 part of silicone masterbatch, 0.5 parts of lubricant, 0.5 parts of BIPB, 1 part of TMPTMA, 1,2 polybutylene Alkene, 0.3 parts of antioxidant.

[0038] 1. After weighing EPDM and PP on an electronic balance according to the above formula, put them into a low-speed stirring pot, add antioxidant and lubricant at the same time, and stir for 3 minutes.

[0039] 2. Put the mixture evenly stirred in 1 into a twin-screw extruder with an aspect ratio of 56, rotate at a speed of 300 rpm, and plasticize at a temperature of 190°C, and granulate to form a premix.

[0040] 3. The cross-linking agent BIPB weighed according to the above formula, the high-activity auxiliary cross-linking agent TMPTMA and the low-activity auxiliary cross-linking agent 1,2-polybutadiene, as well as PPA powder and silicone masterbatch are added to the high-speed stirring pot 500 -600rpm, mixing for 3min.

[0041] 4. Put...

Embodiment 3

[0043] 30-35 parts of EPDM, 15-20 parts of white oil, 30-35 parts of PP, 0.5 parts of PPA, 1 part of silicone masterbatch, 0.5 parts of lubricant, 0.5 parts of BIPB, 1 part of TMPTMA, 1,2 polybutylene Alkene, 0.3 parts of antioxidant.

[0044] 1. After weighing EPDM and PP on an electronic balance according to the above formula, put them into a low-speed stirring pot, add antioxidant and lubricant at the same time, and stir for 3 minutes.

[0045] 2. Put the mixture evenly stirred in 1 into a twin-screw extruder with an aspect ratio of 56, rotate at a speed of 300 rpm, and plasticize at a temperature of 190°C, and granulate to form a premix.

[0046] 3. The cross-linking agent BIPB weighed according to the above formula, the high-activity auxiliary cross-linking agent TMPTMA and the low-activity auxiliary cross-linking agent 1,2-polybutadiene, as well as PPA powder and silicone masterbatch are added to the high-speed stirring pot 500 -600rpm, mixing for 3min.

[0047] 4. Put...

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PUM

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Abstract

The invention discloses a low mouth die accumulated material polyolefin alloy thermoplastic elastomer and a manufacturing method thereof. EPDM (ethylene propylene diene monomer), PP (polypropylene), white oil, PPA (phenylpropanolamine) powder, silicone master batches, peroxide, high-activity crosslinking agents, low-activity crosslinking agents, antioxidants and lubricants are granulated by two-step double screws to prepare the elastomer, and the resistance of a die orifice in extrusion is reduced. Besides, by compound use of the crosslinking agents, the crosslinking degree of products is improved, and die swelling of the products is reduced, so that mouth die accumulated materials are reduced.

Description

[0001] Technical field: [0002] The invention relates to the technical field of thermoplastic elastomers, in particular to a low-die polyolefin alloy thermoplastic elastomer and a manufacturing method thereof. [0003] Background technique: [0004] TPV thermoplastic elastomer is a thermoplastic elastomer produced by blending and dynamic vulcanization of EPDM (ethylene propylene diene monomer) and PP (polypropylene) through a twin-screw extruder. Among them, EPDM is used as the dispersed phase, and PP is used as the continuous phase. Because TPV is EPDM particles dispersed in PP, it has the excellent aging resistance of EPDM and the processability of PP. In addition to EPDM and PP, paraffin oil is added to TPV as a softener and lubricant, and sometimes a part of filler is added. Commercially produced TPVs are mainly phenolic resin vulcanized TPVs and peroxide vulcanized TPVs. TPV materials can be processed by different processing methods, including extrusion, injection mold...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L23/12C08L27/20C08L83/04C08L91/06
CPCC08L23/12C08L23/16C08L91/06C08L2205/035C08L2207/04C08L27/20C08L83/04
Inventor 何加凯石景山孙永明
Owner 江苏金陵奥普特高分子材料有限公司
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