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Low-temperature-resistant sponge sealing strip and preparation method thereof

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

Active Publication Date: 2021-09-28
瀚德(中国)汽车密封系统有限公司 +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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  • Low-temperature-resistant sponge sealing strip and preparation method thereof
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  • Low-temperature-resistant sponge sealing strip and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A low temperature resistant sponge sealing strip, raw materials include: 70 parts of EPDM, 30 parts of BR, 10 parts of resin, 5 parts of low temperature resistance additive, 5 parts of active zinc oxide, 1 part of stearic acid, 1 part of PEG-4000, quick pressing 50 parts of carbon black, 30 parts of high-structure semi-reinforcing carbon black, 20 parts of light calcium carbonate, 70 parts of high flash point and low pour point paraffin oil; 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°C is 60; Mooney viscosity ML of BR 1+4 100°C is 45; the resin is p-tert-octylphenol formaldehyde resin; the low-temperature resistance additive is anti-cold agent A of Anhui Weide Rubber and Plastic Technology, and the composition is diene polymer; the model of quick-pressed carbon black ...

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 resistant 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-reinforcing 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 GR.

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 resistant 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-reinforcing 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 parts 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. The defects that in the prior art, EPDM rubber is hardened in sealing and weakened in rebound resilience in alpine regions are overcome. The low-temperature-resistant sponge sealing strip comprises the following raw materials in parts by weight: 70 to 80 parts of EPDM, 20 to 40 parts of butadiene rubber, 5 to 15 parts of resin, 5 to 15 parts of a low-temperature-resistant aid, 80 to 115 parts of carbon black, 10 to 30 parts of a filler, 50 to 70 parts of paraffin oil, 0.8 to 1.2 parts of a vulcanizing agent, 2.5 to 3.5 parts of a vulcanization accelerator, 0.2 to 0.5 part of a scorch retarder, 2 to 5 parts of a foaming agent and 3 to 6 parts of a moisture absorbent. By compounding the resin, the butadiene rubber, the low-temperature-resistant aid and the EPDM, the cold resistance, the low-temperature resilience and the like of the product can be effectively improved.

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, waterproofing, dustproofing, and sound insulation of the vehicle. The sponge part of the door strip and door opening sealing strip plays a decisive role in the above performance. The low density and high filling performance of EPDM rubber means that it has lower cost than other rubbers. At the same time, it has excellent flex resistance, chemical stability, ozone resistance and weather aging resistance, making it the first choice for automobile sealing strip rubber . [0003] Although traditional EPDM sealing strips have certain low-temperature resistance properties, 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-Tibe...

Claims

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Application Information

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Patent Type & Authority Applications(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 瀚德(中国)汽车密封系统有限公司
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