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Urea tube and production process thereof

A production process and technology for urea pipes, which are applied in the field of urea pipes, can solve problems such as high cost and complex formula, and achieve the effects of ensuring safety, good aging resistance and excellent lubricating oil resistance.

Active Publication Date: 2012-07-18
QINGDAO SUNSONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no production of this product in China, and there are such products abroad, but the formula is complicated and the cost is high

Method used

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  • Urea tube and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The compound is made from raw materials with the following weight components:

[0038] EPDM 48%,

[0039] Zinc Oxide 2.5%,

[0040] Stearic acid 3%,

[0041] Phenolic resin 0.5%,

[0042] Silica 10%,

[0043] Anti-aging agent 0.2%,

[0044] Silica-alumina carbon black 15%,

[0045] Calcium Carbonate 10%,

[0046] Polyethylene Wax 8%,

[0047] Vulcanizing agent S 0.15%,

[0048] Accelerator DM 0.15%,

[0049] Accelerator TMTD 0.3%,

[0050] Accelerator DTDM 1.8%,

[0051] Accelerator PZ 0.3%,

[0052] Anti-scorch agent 0.1%.

[0053] 1) Put EPDM rubber, zinc oxide, stearic acid, phenolic resin and anti-aging agent into pressurized banburying, then add white carbon black, silicon aluminum carbon black, calcium carbonate and polyethylene wax into banburying, the pressure It is 0.5±0.05MPa. During mixing, when the temperature rises to 80°C, lift the top bolt once, when the temperature rises to 90°C, lift the top bolt once, and when the temperature rises to 110°...

Embodiment 2

[0057] The compound is made from raw materials with the following weight components:

[0058] EPDM 52%,

[0059] Zinc Oxide 2.5%,

[0060] Stearic Acid 2.8%,

[0061] Phenolic resin 0.6%,

[0062] Silica 10%,

[0063] Anti-aging agent 0.3%,

[0064] Silica-alumina carbon black 15%,

[0065] Calcium Carbonate 8%,

[0066] Polyethylene wax 6%,

[0067] Vulcanizing agent S 0.25%,

[0068] Accelerator DM 0.25%,

[0069] Accelerator TMTD 0.3%,

[0070] Accelerator DTDM 1.5%,

[0071] Accelerator PZ 0.4%,

[0072] Anti-scorch agent 0.1%.

[0073] 1) Put EPDM rubber, zinc oxide, stearic acid, phenolic resin and anti-aging agent into pressurized banburying, then add white carbon black, silicon aluminum carbon black, calcium carbonate and polyethylene wax into banburying, the pressure It is 0.5±0.05MPa. During mixing, when the temperature rises to 80°C, lift the top bolt once, when the temperature rises to 90°C, lift the top bolt once, and when the temperature rises to 110°C...

Embodiment 3

[0077] The compound is made from raw materials with the following weight components:

[0078] EPDM 45%,

[0079] Zinc Oxide 3%,

[0080] Stearic acid 3%,

[0081] Phenolic resin 0.5%,

[0082] Silica 15%,

[0083] Anti-aging agent 0.5%,

[0084] Silico-alumina carbon black 12%,

[0085] Calcium Carbonate 10%,

[0086] Polyethylene Wax 8%,

[0087] Vulcanizing agent S 0.1%,

[0088] Accelerator DM 0.1%,

[0089] Accelerator TMTD 0.2%,

[0090] Accelerator DTDM 2%,

[0091] Accelerator PZ 0.4%,

[0092] Anti-scorch agent 0.2%.

[0093] 1) Put EPDM rubber, zinc oxide, stearic acid, phenolic resin and anti-aging agent into pressurized banburying, then add white carbon black, silicon aluminum carbon black, calcium carbonate and polyethylene wax into banburying, the pressure It is 0.5±0.05MPa. During mixing, when the temperature rises to 80°C, lift the top bolt once, when the temperature rises to 90°C, lift the top bolt once, and when the temperature rises to 110°C, lif...

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Abstract

The invention relates to a urea tube resisting heat, automotive urea and lubricating oil. The urea tube is mainly made from ethylene propylene diene monomer rubber. The urea tube has the beneficial effects that a frequently-used vulcanization system of sulphur is utilized to ensure the comprehensive performance of a rubber material; zinc oxide and stearic acid are utilized to activate the physical properties of the rubber material, and at the same time phenolic resin is added to improve the bonding of the rubber material and yarns and ensure burst pressure and volume expansion; reactive type long-acting antiager is utilized to prevent heat aging and ozone aging; and a plasticizer DOS (dioctyl sebacate) is utilized to replace the previous paraffin oil to improve cleanness and prevent permeating leakage of urea and other media, and at the same time white carbon black and light calcium are added to reinforce the strength of the ethylene propylene diene monomer rubber. The obtained flexible tube has good heating resisting, automotive urea resisting and lubricating oil resisting performances, and has the parameters of fastness and permeation resistance less than 2 ccm / min without leakage and less than 5 ppm without permeation, volume expanded by 8%-10% and the bending radius less than or equal to 30 mm so as to move freely.

Description

technical field [0001] The invention relates to a heat-resistant, car-resistant urea and lubricating oil-resistant urea tube, specifically a process and method for making the urea tube by using ethylene-propylene rubber through reasonable rubber formula design. Background technique [0002] SCR stands for a post-treatment technology called Selective Catalytic Reduction, which uses Australia 32 reagent (AdBlue in China and Europe, DEF in the Americas, ARLA32 in Brazil) to reduce NOx emissions. Around the world, almost all major heavy-duty vehicle manufacturers have decided to use this technology in future products to meet new regulations on nitrogen oxide emissions. Since other technologies are less fuel efficient and release higher CO2 emissions, SCR technology is the most cost-effective approach in NOx reduction solutions. [0003] The main components of the selective catalytic reduction system include the catalyst, the storage tank of AdBlue and the metering control devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L61/06C08K13/02C08K3/22C08K5/09C08K3/36C08K3/26C08K3/06F16L11/04
Inventor 李锴孙铭雪刘杰朱德华
Owner QINGDAO SUNSONG CO LTD
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