A kind of low temperature resistant sponge sealing strip and preparation method thereof

A technology for low temperature resistant and sealing strips, which is applied in the field of low temperature resistant sponge sealing strips and its preparation, which can solve the problems of weakened resilience, difficulty in sealing and opening and closing, and hardening of seals, reducing the possibility of achieving, increasing the quantity, and improving cold resistance sexual effect

Active Publication Date: 2022-06-21
HENNIGES (CHINA) AUTOMOTIVE SEALING SYST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although traditional EPDM sealing strips have certain low-temperature resistance performance, problems such as hardening of the seal and weakening of resilience will still occur in high-cold regions such as the Northeast and the Qinghai-Tibet Plateau, resulting in difficulties in sealing and opening and closing the door

Method used

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  • A kind of low temperature resistant sponge sealing strip and preparation method thereof
  • A kind of low temperature resistant sponge sealing strip and preparation method thereof
  • A kind of low temperature resistant sponge sealing strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A low-temperature-resistant sponge sealing strip, the raw materials include: 70 parts of EPDM, 30 parts of BR, 10 parts of resin, 5 parts of low-temperature resistance additives, 5 parts of active zinc oxide, 1 part of stearic acid, 1 part of PEG-4000, fast pressing 50 parts of carbon black, 30 parts of high-structure semi-reinforced carbon black, 20 parts of light calcium carbonate, 70 parts of paraffin oil with high flash point and low pour point; 1.2 parts of sulfur, 2.8 parts of vulcanization accelerator, 2.5 parts of foaming agent, 0.4 parts of anti-scorch agent, 5 parts of KEZADOL GR;

[0035] Among them, in EPDM, ENB content is 9%, ethylene content is 44%, Mooney viscosity ML 1+8 150℃ is 60; Mooney viscosity ML of BR 1+4 100℃ is 45; the resin is p-tert-octylphenol formaldehyde resin; the low temperature resistant additive is the cold-proof agent A of Anhui Weide Rubber & Plastic Technology, and the component is diene polymer; The model of high-structure semi-...

Embodiment 2

[0045] A low temperature resistant sponge sealing strip, the difference from Example 1 is that the amount of raw materials is different, and the raw materials include: 70 parts of EPDM, 30 parts of BR, 10 parts of resin, 15 parts of low temperature resistance additives, 5 parts of active zinc oxide, stearic acid 1 part, 1 part of polyethylene glycol, 50 parts of fast extruded carbon black, 30 parts of high-structure semi-reinforced carbon black, 20 parts of light calcium carbonate, 70 parts of paraffin oil with high flash point and low pour point; 1.2 parts of sulfur, Vulcanization accelerator 2.8 parts, foaming agent 2.5 parts, scorch retarder 0.4 parts, GR 5 parts.

Embodiment 3

[0047] A low-temperature-resistant sponge sealing strip, the difference from Example 1 is that the amount of raw materials is different, and the raw materials include: 70 parts of EPDM, 40 parts of BR, 10 parts of resin, 15 parts of low temperature resistance additives, 5 parts of active zinc oxide, stearic acid 1 part, 1 part of polyethylene glycol, 50 parts of fast extruded carbon black, 30 parts of high-structure semi-reinforced carbon black, 20 parts of light calcium carbonate, 70 parts of paraffin oil with high flash point and low pour point; 1.2 parts of sulfur, 2.8 parts of vulcanization accelerator, 2.5 parts of foaming agent, 0.3 part of anti-scorch agent, 5 parts of GR.

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Abstract

The invention discloses a low-temperature-resistant sponge sealing strip and a preparation method thereof, which overcomes the defects of EPDM rubber in the prior art that the seal becomes hard and the rebound elasticity is weakened in the alpine region. A low-temperature-resistant sponge sealing strip in the present invention comprises the following raw materials in parts by weight: 70-80 parts of EPDM, 20-40 parts of butadiene rubber, 5-15 parts of resin, 5-15 parts of low-temperature resistant additive, and carbon black 80-115 parts, 10-30 parts of filler, 50-70 parts of paraffin oil, 0.8-1.2 parts of vulcanizing agent, 2.5-3.5 parts of vulcanization accelerator, 0.2-0.5 parts of anti-scorch agent, 2-5 parts of foaming agent, Hygroscopic agent 3-6 parts. The invention adopts resin, butadiene rubber, low-temperature resistance additive and EPDM to compound, which can effectively improve the cold resistance and low-temperature rebound performance of the product.

Description

technical field [0001] The invention relates to the field of sealing strips, in particular to a low temperature-resistant sponge sealing strip and a preparation method thereof. Background technique [0002] As an auto part, the sealing strip plays a role in sealing the vehicle against water, dust, and sound insulation. The sponge part of the door strip and the door opening sealing strip plays a decisive role in the above performance. The low density and high filling performance of EPDM rubber means lower cost than other rubbers, and it has excellent flex resistance, chemical stability, ozone resistance and weathering resistance, making it the first choice for automotive weather strip rubber . [0003] Although the traditional EPDM sealing strip has a certain low temperature resistance, problems such as hard sealing and weakening of resilience will still occur in high and cold regions such as Northeast China and the Qinghai-Tibet Plateau, resulting in difficulties in sealing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L9/00C08L71/02C08L61/08C08K13/02C08K3/26C08K3/04C08K3/06C08K3/22C08K5/09C08K5/43C08J9/10
CPCC08J9/105C08J9/0095C08J9/0066C08J9/0061C08J9/0023C08J9/0033C08J2203/04C08J2323/16C08J2409/00C08J2471/02C08J2461/08C08K13/02C08K2003/265C08K3/04C08K3/06C08K2003/2296C08K5/09C08K5/43
Inventor 郑维文李士鹏倪磊
Owner HENNIGES (CHINA) AUTOMOTIVE SEALING SYST CO LTD
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