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Heat-resistant rubber water-stop belt for high geothermal areas

A technology of heat-resistant rubber and water-stop, which is applied in the field of heat-resistant rubber water-stop, which can solve the problems that the water-stop cannot meet the needs of water-stop parts, lose waterproof function, and accelerate aging, so as to reduce the decline of mechanical properties , not easy to volatilize and decompose, and improve the effect of heat aging resistance

Inactive Publication Date: 2019-06-28
HENGSHUI ZHONGTIEJIAN ENG RUBBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of such high temperature, the existing waterstop will accelerate aging and gradually lose its waterproof function
However, the hot air aging condition in the design standard of the existing waterstop is 70°C×24 hours, and the waterstop of this standard obviously cannot be used as a waterstop for concrete buildings such as railway tunnels in high geothermal areas.

Method used

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  • Heat-resistant rubber water-stop belt for high geothermal areas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 80 parts by weight of ethylene-propylene rubber 3200A, 20 parts by weight of chlorinated polyethylene, 5 parts by weight of zinc oxide, 3 parts by weight of stearic acid, and 0.4 parts by weight of antioxidant are put into the internal mixer and mixed for 50 seconds, then 40 parts by weight Parts by weight of carbon black N330, 10 parts by weight of magnesium oxide, 10 parts by weight of silicon dioxide, and 10 parts by weight of plasticizer are put into the internal mixer, mixed for 140 seconds, discharged to the open mixer, and added after cooling down through the thin pass 2 parts by weight of dicumyl peroxide (DCP) and 1 part by weight of auxiliary cross-linking agent TAIC, mixed evenly and then tableted.

[0036] The mixed rubber material is extruded by a single-screw extruder and then vulcanized by a vulcanization box. The temperature of the screw and barrel is set at 60°C, and the temperature of the vulcanization box is set at 220°C.

Embodiment 2

[0038] Put 90 parts by weight of ethylene propylene rubber 2070P, 10 parts by weight of chlorinated polyethylene, 6 parts by weight of zinc oxide, 2.5 parts by weight of stearic acid, and 0.5 parts by weight of antioxidant into an internal mixer for mixing for 60 seconds, then 50 parts by weight Parts by weight of carbon black N550, 8 parts by weight of magnesia, 15 parts by weight of attapulgite, and 8 parts by weight of plasticizer are put into the internal mixer, mixed for 160 seconds, discharged to the open mixer, and added after cooling down through the thin pass 2.5 parts by weight of dicumyl peroxide (DCP) and 0.4 parts by weight of auxiliary cross-linking agent sulfur, mixed evenly and then tableted.

[0039] The mixed rubber is extruded by a single-screw extruder and then vulcanized by a vulcanization box. The temperature of the screw and barrel is set at 70°C, and the temperature of the vulcanization box is set at 240°C.

Embodiment 3

[0041] Put 85 parts by weight of ethylene propylene rubber 8550, 15 parts by weight of chlorinated polyethylene, 4.5 parts by weight of zinc oxide, 4 parts by weight of stearic acid, and 0.5 parts by weight of antioxidant into a banbury mixer for 50 seconds, and then 50 parts by weight Parts by weight of carbon black N550, 8 parts by weight of silicon dioxide, 12 parts by weight of attapulgite, and 9 parts by weight of plasticizer are put into the internal mixer, mixed for 160 seconds, and discharged to the open mixer. Add 2 parts by weight of dicumyl peroxide (DCP) and 1 part by weight of auxiliary crosslinking agent TAC, mix evenly and then release the tablet.

[0042] The mixed rubber is extruded by a single-screw extruder and then vulcanized by a vulcanization box. The temperature of the screw and barrel is set at 80°C, and the temperature of the vulcanization box is set at 220°C.

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Abstract

The invention belongs to the technical field of water-stop belts, and discloses a heat-resistant rubber water-stop belt for high geothermal areas. The water-stop belt is prepared by the following steps: mixing ethylene propylene rubber, rubber-grade chlorinated polyethylene, zinc, stearic acid and antioxidant in a mixer; adding carbon black, inorganic filler and plasticizer into the mixer, uniformly mixing, and laying onto an open mill; passing through rolls and cooling, adding vulcanizer and assistant crosslinker, uniformly mixing, and batching out; and extruding, vulcanizing and molding to obtain the water-stop belt which has excellent heat resistance and can be used for a long time in high geothermal areas. By adopting the method, the service life of the rubber water-stop belt can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of waterstops, in particular to a heat-resistant rubber waterstop suitable for high geothermal areas. Background technique [0002] Rubber waterstops are mainly used at the joints of concrete building components to prevent water seepage and water leakage at the joints of buildings and ensure the weight of the building. However, rubber will gradually age during long-term use, especially in high geothermal areas, where the temperature is above 60°C, and the geothermal temperature in some areas is even as high as 100°C to 140°C. Under the action of such a high temperature, the existing waterstop will accelerate aging and gradually lose its waterproof function. However, the hot air aging condition in the existing waterstop design standard is 70°C × 24 hours. The waterstop of this standard obviously cannot be used as a waterstop for concrete buildings such as railway tunnels in high geothermal areas. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/28C08K13/02C08K3/22C08K5/09C08K3/04C08K3/36C08K3/34C08K5/14
Inventor 李朋贾雷雷金家康赵晓燕孙其战赵荣代英姿李登培王磊磊贾峰伟王磊
Owner HENGSHUI ZHONGTIEJIAN ENG RUBBER
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