Principles of Bonding Cast Polyurethane to Metals | Gallagher Corporation

[@intjonmiller]

Very informative and compelling. Thank you!

[@tigranohanyan3321]

I used polyester powder coating on metal (stainless steel and steel) as a primer before casting 90A shore polyurethane 2 part resin. It works great. Again, I used just regular white polyester powder coating baked with high temperature. The bond is so strong that It is very hard to remove polyurethane from metal surface.

[@GallagherCorporation]

Hi Tigran, which polyester powder coating formulation did you try with success? Was it a TGIC polyester or the non -TGIC (or HAA type, also called Primid type)?

[@aaarrh6]

Very informative, well produced and comprehensive. 👏👍💥

[@GallagherCorporation]

Thanks! Glad you enjoyed it.

[@nagaraja.t.s.7069]

Which is the bonding primer used? And also for different base metals like iron,steel or aluminium primer is same or different?

[@GallagherCorporation]

Hi Nagaraja, we use several kinds of bonding agent depending on the application. It is possible to use the same bonding agent on a variety of metals.

[@musmantaiq6711]

@@GallagherCorporation Which bond are you use tpu to aluminium bonding

[@GhostPatronYT]

I didn't know there was so much theory to my everyday work EZ. Great tutorial 👍

[@kargunbatur1369]

What is your bond strength value as N/mm for your polyurethane wheels, i didn't see any information about that in your official site

[@GallagherCorporation]

Ultimately, the bond strength of our products exceeds the materials strength. The values obtained from bond testing are influenced heavily by the urethane compound. Due to this, two parts cast with different materials can both have exceptional bond, but very different values from our bond test.

[@kargunbatur1369]

@@GallagherCorporation I see, can i ask a question too, according to which standard are you testing the bond strength ?

[@wg1159]

If a Polyurethane to steel bond is purely shear loaded (so no peel), should the surface roughness still be Ra250? And how well does the bond perform on a pure shear application? Application is a PU disc with diameter 500 mm and thickness 150 mm bonded to a steel bottom and top plate under shear load.

[@GallagherCorporation]

Bonding to two surfaces at the same time can be tricky. Reach out to us if you are experiencing failures and we can talk more.

[@gizembeliktay4657]

Hi, first of all, thank you for the informative video. I know that polyurethane is a mixture of isocyanate and polyol components and these parts react with each other by the time they become together. How in the spray coating of polyurethane the parts are mixed and how they become stable when they mixed? I would be grateful if you answer.

[@GallagherCorporation]

Thanks for watching, Gizem! We are not familiar enough with spray polyurethane to comment on that. We cast mold, injection mold, and 3D print polyurethane.

[@ekussachdeva3416]

is hand casting / Manual casting good for polyurethane process? or machine casting is better

[@GallagherCorporation]

We would confidently say that using meter-mix machines is the way to go.

[@thanveermohamedk.a2437]

Hello friends, I am working in a grinding wheels production company and we produce various types of grinding wheels. We also produce Resin bonded wheels in which we experience a problem of abrasive resin layer getting slipped of from the metal base(aluminium). Normally for good adhesion of the abrasive layer, we used to create seration on the aluminium body, grit blast it, also we used to apply a layer of primer on the grit blasted area. But still after all the processes are done our abrasive wheel gets slipped of from the metal base. Can you guys suggest me any good idea how to overcome this issue.

[@GallagherCorporation]

Thanveer, it's hard to say. There are so many contributing factors.

[@სანდროჭანტურია-ჟ9ი]

in that kind of wheel how much is A ? ( hardness of polyurethane )

[@GallagherCorporation]

Find out more about the hardness of polyurethane here - gallaghercorp.com/polyurethane-durometer-hardness/

[@diananggitasari9888]

Hi, can you tell me what machine you used to test the bonding on that video?

[@GallagherCorporation]

Instron Machine

[@maksimchernykh]

4:30 best wedding ring ever seen

[@musmantaiq6711]

Which bond are you use for bonding of tpu to aluminium

[@GallagherCorporation]

We could get into the specifics if we partner on something.

[@adeebshamkhi8221]

Can we use polyurethane for sealing holes in water galvanized steel tanks?

[@GallagherCorporation]

Hello Adeeb, we mold solid polyurethane elastomers. You should reach out to someone that works in sealants. Thank you.

[@griffinb2009]

Great video

[@joncot1812]

These guys flew delta way too much. I feel like I'm watching the pre flight boarding video lol. Good video though, I appreciate the info!

[@polyurethanemachinery]

Thanks for the vedio

[@GallagherCorporation]

Welcome!

[@نورالاسلام-س2ن]

Good