Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 46 to 56 of 56
Thread: Melbourne Foundry Suppliers
-
28th April 2012, 05:30 PM #46
-
28th April 2012 05:30 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Age
- 2010
- Posts
- Many
-
28th April 2012, 05:47 PM #47
Yes Bentonite 34 is definitely different to Bentonite, there is also a Bentonite 38.
We used this in paints to stop pigments from settling in the can over time. You can make some good gels with it as well by dispersing it in turps and adding a dash of metho, really increases its' effectiveness as an anti-settling agent.
http://www.kianresin.com/TDS/Additives/bentone%2034.pdf
-
28th April 2012, 05:53 PM #48
Hi Fred,
Just to clarify it a bit more precisely what's needed for oil bonded sand is Bentone not Bentonite
I looked up Bentone 34, (same pdf as you've already linked to) and paintsettlinganti-settling is one of it's applications, so it could be a winner..
Regards
Ray
-
28th April 2012, 06:10 PM #49
As I mentiond above, as well as Bentone 34 there are a couple of other Bentones as well. Bentone 27 is for use in systems using ketones and alcohols, Bentone 38 is used more in specialist industrial paint applications.
Bentone 34 is the paint industry workhorse and any self respecting paint manufacturer uses it and should have it in stock.
Bentonite is the clay that these 3 are derived from and can be bought in different grades, used extensively in the drilling industry for their muds as well to seal dams and a multitude of other industrial uses.
I'll go back in to retirement now and hang up my white coat
-
28th April 2012, 07:38 PM #50Senior Member
- Join Date
- Nov 2008
- Location
- Far North Queensland
- Posts
- 330
Sounds like you may be onto something, I asked my (possible) son in law and he doesn't recognize the name, but from what I can gather Bentone is a brand name so they may have it under a different name where he works. He has also only been working there for a short time so may not have come across it yet.
Interesting that you mention adding metho as the recipe linked before has alcohol as the final ingredient, which as my friend remembers turns the whole lot into a plasticine type of consistency. Unfortunately my friend cannot remember where he got the Bentone originally, it was 10 years ago...
Looks like I better get stuck into some milky pine boards and get some patterns ready
Cheers.
Russell.
-
28th April 2012, 08:19 PM #51
Hi Russell,
We usually add a bit of isopropanol when the petrobond gets a bit "loose" it adds to the green strength somehow.
For what it's worth methylated spirits is 95% ethanol, (the yanks call it DNA, denatured alcohol) whatever you call it, it's not methanol, If I remember correctly shell racing A was mostly methanol, but having said that I'm not clear if it makes any difference whether you use methanol or ethanol... ??
Of course excepting one makes you drunk, the other will send you blind... ( literally)
But it the recipe calls for methanol, then that's a good starting point..
Regards
Ray
-
28th April 2012, 08:31 PM #52
I used to get methanol for remote control planes, i could get it from the hobby shops, but i think i got a 20l drum off it from the airport some years ago. Don't know if they will still sell it to you though, i got it pre 9-11, security around airports is alot tighter now.
Ewan
-
28th April 2012, 08:45 PM #53Senior Member
- Join Date
- Nov 2008
- Location
- Far North Queensland
- Posts
- 330
The alcohol isn't too critical by the looks of it, the recipe mentions either alcohol (isopropyl, like the rubbing alcohol) or methanol, also a couple of other options that will work.
Just gotta find some Bentone 34 and I am in business.
I can post the test results here if anybody is interested, hope to have it sorted and start testing in a week or two.
Russell.
-
28th April 2012, 09:51 PM #54
-
28th April 2012, 10:03 PM #55
-
28th April 2012, 11:41 PM #56Senior Member
- Join Date
- Nov 2008
- Location
- Far North Queensland
- Posts
- 330
Righto, point taken.
Will start the search next week.
Cheers.
Russell.
Similar Threads
-
Bandsaw suppliers in Melbourne?
By holbytla in forum BANDSAWSReplies: 9Last Post: 8th May 2009, 06:00 PM -
Timber Suppliers in Melbourne
By ftje in forum TIMBERReplies: 13Last Post: 7th January 2007, 12:39 PM -
Suppliers of timber in S/E Melbourne, VIC.
By Ads Mac in forum TIMBERReplies: 3Last Post: 11th May 2005, 11:09 AM