Heat-resistant hose

A hose and heat-resistant technology, which is applied in the direction of hoses, pipes, tubular objects, etc., can solve the problems of limited use, quality and reliability, and achieve excellent performance, good durability, and excellent heat resistance.

Inactive Publication Date: 2005-08-31
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, for the use of hoses (DPF hoses) for DPF systems (systems designed to remove NOx in exhaust gas), hoses made of acrylic rubber or have a laminated structure of fluorine-containing rubber and hydrogenated rubber hose, its use is also restricted
That is to say, even in this application, compared with conventional fuel hoses for automobiles, not only high heat resistance and durability are required, but also the acid components in the exhaust gas are condensed and liquefied on the inner surface of the hose. Acrylic rubber hoses with poor acid resistance and hoses with a laminated structure of fluororubber and hydrogenated rubber with poor heat resistance also have problems in terms of quality and reliability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0046] [Examples 1-5, Comparative Examples 1-5]

[0047] First prepare 100 parts of terpolymer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene (Dayel G555, manufactured by Daikin Co.), 13 parts of carbon black SRF, 3 parts of MgO#150 and 6 parts of Ca(OH) 2 , This was kneaded using a 5L kneader to prepare a fluorine-containing rubber composition (for the inner layer).

[0048] Separately, the following materials were prepared, mixed in the ratios shown in Tables 1 to 2 below, and kneaded with a 5 L kneader to prepare an acrylic rubber composition (for outer layer). In addition, as the composition for the outer layer in Comparative Example 5, 100 parts of epichlorohydrin rubber (ECO), 75 parts of carbon black SRF, 5 parts of dioctyl phthalate (DOP) as a plasticizer, 1 Parts nickel dibutyldithiocarbamate (NBC) as anti-aging agent, 2 parts MgO#150, 3 parts hydrotalcite compound and 1 part 1,8-diazabicyclo[5.4.0]undecene - A rubber composition obtained by kne...

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Abstract

A heat-resistant hose capable of exhibiting excellent interlaminar adhesion in a high-temperature environment. The heat-resistant hose has a laminar structure of an inner layer formed by fluorine-containing rubber (a fluorine-containing rubber layer 1) and an acrylic rubber layer 2 formed on an outer peripheral surface of the fluorine-containing rubber layer 1, wherein the acrylic rubber layer 2 is formed by a rubber composition comprising the following (A) to (D): (A) an acrylic elastomer; (B) a peroxide crosslinking agent; (C) phenothiazine; and (D) an acid receiver.

Description

technical field [0001] The present invention relates to a heat-resistant hose, and more specifically, to a heat-resistant hose useful as a fuel hose for a new type of diesel engine (diesel engine conforming to exhaust gas regulations) and the like. Background technique [0002] With the strengthening of exhaust gas control, when new diesel engines or diesel special filter (DPF) systems are put into practical use, heat-resistant hoses suitable for their applications are urgently needed. [0003] However, heat-resistant hoses conventionally used for fuel hoses for automobiles and the like are often made of acrylic rubber with excellent heat resistance, or have a laminated structure of fluorine-containing rubber and hydrogenated rubber. However, whether it is a hose made of acrylic rubber or a hose having a laminated structure of fluorine-containing rubber and hydrogenated rubber, there are restrictions on the use of new diesel engines. That is to say, for the new diesel engin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/00B32B1/08B32B25/14C08K3/00C08K5/14C08K5/46C08L33/00F16L11/04F16L11/08
CPCB32B1/08F16L11/085B32B25/14B32B2307/306B32B2597/00
Inventor 筱原英树
Owner SUMITOMO RIKO CO LTD
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