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Questions concerning iron and steel, steel making, rod rolling, galvanizing, springs, nails, fencing, and patenting go here.
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CUMAR COATING 2 years, 3 months ago #815

Dear Sirs,
I would like know ..
What is cumar coating?
What is the purpose of this coating in Tyre bead wire?


Re: CUMAR COATING 2 years, 3 months ago #816

Hello sachin_shaha,

Originally Cumar was an early contamination source of polychlorinated biphenyls (PCBs). It was a coating used on the inside of concrete farm silos and was first formulated in 1941. This is not what you are referring to but we have put it here to eliminate any confusion.

In today's World, coumarone resin is a thermoplastic resin obtained by polymerization of indene and coumarone. It is used in coatings, paint, asphalt tile and as a plasticizer in un-vulcanized rubber. Please see the following HallStar Company Product Information Sheet for Suprmix CumarĀ® P-10 (A free flowing powder.) On the other hand, CumarĀ® P-10 is a viscous liquid. Some of your queries are answered in a few sentences at the HallStar URL above.

Peter J. Stewart-Hay
Stewart-Hay Associates
519 641- 3212

Re: CUMAR COATING 2 years, 3 months ago #817

Cumar is a resin use on the bead wire to protect the bronze plated coating of the wire which gives adherence to the rubber of the bead of the tires and helps as well with the adherence.

Eduardo Anaya
Senior Consultant
Mexico City
This email address is being protected from spambots. You need JavaScript enabled to view it.
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