Looking for material 2

[linjeremy]

Hi

I'm trying to identify new TPU material for my product application requiring excellent heat and abrasion resistant, most importantly it has to be resistant to a mixture of mineral oil/lubricant/surfactant/water. If possible, it would be milky white to yellowish in color.

For operating conditions, it would be interfaced with the solvent mixture mentioned above, running around 8000 RPM/min. The operating temperature range would be about 80 C to 95° C.

Thanks in advance for any advice.

 

[patprimmer]

Have you contacted BASF, Bayer, Merquinsa and Noveon

Regards
Pat
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[linjeremy]

Hi Pat

YES I already tried BASF C85A & C90A, unfortunately it quickly lost its strength/hardness under heating conditions with 8000 RPM/min. Right now, I have Noveon 58134, 58130, Bayer Desmopan 300/400 series, Huntsman A92K but still not quite up to client expectations thus would like to hear other opinions to see if I can try other materials from Automotive engineering or Seals or I might have omitted something. Should I consider addictives?

(YES I am looking for 86~90A material)

Thanks.

JEM

 

[patprimmer]

Are you sure you need PU and not some other elastomer, like PEBAX or polyester block copolymers.
PUs tend to be only moderate to high temperature and poor to water. I know there are a lot of grades and they cover a wide variation in properties. I am not familiar with the full ranges of properties offered and would simply be searching data sheets.

Regards
Pat
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[linjeremy]

Thanks PAT.

A quick look at PEBAX data I am a little concerned with its slightly low melting point 140 C/ abrasion properties, do you have any experiences with this type of material?

 

[patprimmer]

My experience was 30 years ago.

Those vague memories had it down as a high temperature elastomer. I have no data at hand to check
I know polyester block copolymers have quite high temperature ratings, but they are somewhat harder than most rubbers.

Regards
Pat
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[Pud]

Have a look at the polyester elastomers such as Hytrel (Du Pont) and Arnitel (DSM). There are others too.

http://www2.dupont.com/Renewably_Sourced_Materials/en_US/hytrel.html

http://www.dsm.com/en_US/html/dep/Arnitel_chemres.htm

Cheers

Harry

http://www.tynevalleyplastics.co.uk

 

[patprimmer]

Thanks Harry

Their the ones I was thinking of and forgot to translate from chemical name to real name.

Regards
Pat
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[Pud]

Pat, I know the feeling - I must confess I had to ask the wife! It's been a few years since we used them.

Imo, a bit easier to process than TPU, although the drying is just as critical being a polyester.

H

http://www.tynevalleyplastics.co.uk

 

[linjeremy]

Thank you two experts.

JEM.

 

[Pud]

Become an instant expert and talk with authority on TPE's:

http://www.ptsuk.com/powerpoints/Thermoplastic Elastomers.pdf

Harry

http://www.tynevalleyplastics.co.uk