Method of improving airtightness of hydraulic or pneumatic...

Details Method of improving airtightness of hydraulic or pneumatic... Method of improving airtightness of hydraulic or pneumatic...

2006-04-04

2006-04-04

Woodward, Ana (Department: 1711)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C254S264000, C428S036900

Reexamination Certificate

active

07022389

ABSTRACT:
A hydraulic or pneumatic device is provided, which comprises a tube comprising a polyamide resin composition comprising (A) from 70 to 97% by weight, based on the weight of the polyamide resin composition, of a polyamide resin and (B) from 3 to 30% by weight, based on the weight of the polyamide resin composition, of a plasticizer comprising an ester of p- and/or o-hydroxybenzoic acid with a C12–C22aliphatic alcohol having a branched chain and a component comprising a rubber compound comprising a polar rubber as a main component, and which exhibits a high reliability over an extended period of time.

REFERENCES:
patent: 6491994 (2002-12-01), Kito et al.
patent: 6541085 (2003-04-01), Isobe et al.
patent: 0 658 602 (1995-06-01), None
patent: 0 748 847 (1996-12-01), None
patent: 2 264 761 (1993-09-01), None
patent: 1-185362 (1989-07-01), None

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