Title:  PROCESS FOR PRODUCTION OF BALLAST

Number:  WO2012126145

 Publication date: 27-9-2012

Applicant/Assignee: BAYER M.S.

Gist: Two component PU foam system applied by low pressure process to ‘ballast’ stones used to make railway lines,  dams, coastal protection etc.

Why it is interesting: This looks like a ‘long shot’ :  expensive, high volume, not very sustainable nor durable, yet BASF have a similar system “ ELASTOCOAST” (TM) .   This is one of the few arena’s in PU where Bayer and BASF appear to go head to head, although Bayer is probably more interested in the railway business. They also have systems for PU composite railwaysleepers, elastomers etc.  See here