Rubber combination and diaphragm containing same

A rubber diaphragm and rubber technology, applied in rubber layered products, layered products, chemical instruments and methods, etc., can solve the problems of hardening, loss of elasticity, oil resistance and high weight change rate of the diaphragm, and achieve low and low temperature resistance. Performance, ease of implementation, good elasticity

Active Publication Date: 2013-04-24
SHANGHAI JIAFU NEW MATERIAL TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] At present, the oil-resistant diaphragm produced in China has a high rate of oil-resistant weight change in gasoline or gasoline plus benzene, and the working temperature is only -30°C-+80°C. The diaphragm will harden and lose its elasticity below -30°C ,unable to work properly
[0005] In summary, although the existing rubber diaphragms have good mechanical properties, their oil resistance and low temperature resistance still need to be improved.

Method used

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  • Rubber combination and diaphragm containing same

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Experimental program
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Effect test

Embodiment 1-6

[0027] The rubber compositions were formulated according to the formulations listed in Table 1. First, mix the nitrile rubber and the second rubber evenly on an open mill; then mix the mixed rubber and other prepared raw materials through an internal mixer; impregnate and dry the skeleton material cloth nylon with 589 resin; dry the dried skeleton material The mixed rubber is calendered on a calender as required; the rolled semi-finished product is vulcanized by a drum vulcanizer, the pressure of the vulcanizer is controlled at 18-20Mpa, and the temperature is maintained at 155-165°C.

[0028] Table 1. Raw material proportioning of embodiment 1-7

[0029]

[0030] * The vulcanizing agent is a mixture of sulfur and dithiodimorpholine (DTDM); the accelerator is N, N'-tetramethyldithiodithiocarbamide (TMTD)

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Abstract

The invention provides a rubber combination, which is used for manufacturing rubber diaphragms. The combination comprises the following raw materials by weight percent: 25-47 percent of acrylonitrile butadiene rubber, 5-20 percent of second rubber selected from cis-butadiene rubber, butadiene styrene rubber, natural rubber and chloroprene rubber, 20-35 percent of low-temperature reinforcing agent, 1-3 percent of adhesive and the balance of other commonly-used additives. The rubber diaphragm prepared by the combination has the advantages that the oil resistance and the low temperature resistance are improved.

Description

technical field [0001] The present invention relates to rubber composition and its application. Background technique [0002] In vehicles such as cars and motorcycles, it is often necessary to use a rubber diaphragm, such as: rubber diaphragms for mechanical pumps, rubber diaphragms for automobile distributors, rubber diaphragms for automatic regulating valves, and air pressure protection valve diaphragms film etc. These diaphragms require high oil resistance and low temperature resistance, especially in cold regions, it is often required that the diaphragm can withstand low temperatures below -35°C. However, the performance of the diaphragm in the prior art cannot meet the above requirements. For example, Chinese patent ZL200510004994.5 proposes a polyurethane rubber diaphragm, which uses 100 parts of polyurethane raw rubber HA-5, 0.4-0.8 parts of stearic acid SA, 32-40 parts of carbon black SANG110 and 3.2-4.0 parts by weight Accelerator TMTD. The rubber diaphragm has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B25/10C08L9/02C08L9/00C08L9/06C08L7/00C08L11/00C08K13/02C08K3/36
Inventor 兰平章斌
Owner SHANGHAI JIAFU NEW MATERIAL TECH CO LTD
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