What Does "W" Represent in Acid Number and Softening Point?

[Rajini]

Dear PF users,

We know what is meant by acid number and softening point for resins.
If it is mentioned as acid number is 8W60 and softening point is 130W180 °C, I am just confused what about 'W' in between those numbers..

Thanks for your reply.
Regards, Rajini.

 

[chemisttree]

Is that nomenclature coming from your resin supplier? If yes, which one? Could the 'w' be a misprint perhaps? It might have been meant to be a hyphen, for example.

 

[Rajini]

Hi Chemistree,
Yes, it is a misprint of some Japanese patent application. 8W30 should be read as 8~30 (8 to 30). When look into PDF file my doubt got cleared.
Thanks, Rajini.