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Microgel-containing vulcanizable composition based on hydrogenated nitrile rubber

a technology of hydrogenated nitrile rubber and vulcanizable composition, which is applied in the field of microgel-containing vulcanizable composition based on hydrogenated nitrile rubber, to achieve the effect of improving mechanical properties

Inactive Publication Date: 2007-06-14
ARLANXEO DEUT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] The object of the present invention consisted in providing vulcanisates which are based on hydrogenated nitrile rubbers and which have markedly improved mechanical properties, in particular at high temperatures, such as 130° C., and also after storage in hot air at 150° C.

Problems solved by technology

These specifications disclose improvement of various vulcanisate properties via additions of microgels, but not with the focus on high-temperature applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

Preparation Examples for the Microgels:

[0131] The preparation of the microgels used in the remaining examples is described below.

[0132] Microgels A and B were prepared via emulsion polymerization, using the following monomers: butadiene, styrene, trimethylolpropane trimethacrylate (TMPTMA) and hydroxyethyl methacrylate (HEMA). The monomers used for preparation of the microgels, and also substantial constituents of the mixing specification, have been collated in Table 1 below:

TABLE 1Composition of microgels A and B usedEmulsifiersMonomersWaterMersolatTCD2)TMPTMAHEMAInitiationActivationTerminationK30 / 951)(20%)ButadieneStyrene(90%)(96%)Microgel[g][g][g][g][g][g][g][g][g]A126082875301372503805.50172322.5(Tg = −75° C.)B137422511251372502740.5304.5105350.0(Tg = −65° C.)

1)Mersolat ® K 30 / 95 (Lanxess Deutschland GmbH): Isomeric mixture of the sodium salts of long-chain alkylsulphonic acids. Content of active substance is 95% by weight.

2)TCD Sodium salt of reaction product of bishydrox...

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Abstract

A novel vulcanizable composition is provided, based on at least one hydrogenated nitrile rubber, on at least one peroxide, on at least one unsaturated carboxylic acid and / or salts thereof, and also on specific microgels. These vulcanizable compositions can be used to obtain vulcanized products which can in particular be used for drive belts, roll coverings, hoses and cables.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a microgel-containing vulcanizable composition based on hydrogenated nitrile rubber and to its preparation, and moreover to vulcanized products produced therefrom and to their use in particular in drive belts, in roll coverings, in gaskets, in hoses and in cables. BACKGROUND OF THE INVENTION [0002] The production of vulcanized rubber items based on hydrogenated nitrile rubbers is known in particular for drive belts, roll coverings, gaskets, hoses and cables. If the items based on partially hydrogenated nitrile rubbers are produced via sulphur vulcanization according to DE-A-29 139 92 or EP-A-0 265 706, the properties of these rubber items then become inadequate in particular at the high temperatures nowadays encountered in various applications. Vulcanisates with better ageing resistance are obtained on the basis of more highly hydrogenated nitrile rubbers which are vulcanized with sulphur according to EP-A-0 112 109, or ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L9/02
CPCC08C19/02C08K5/14C08L15/00C08L21/00C08L9/02Y10T428/1386Y10T428/139C08L2666/08
Inventor OBRECHT, WERNERWRANA, CLAUS
Owner ARLANXEO DEUT GMBH
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