1. 
   Polybutylene
   Polybutylene (polybutene-1, poly(1-butene), PB-1) is a polyolefin or saturated polymer with the chemical formula (C4H8)n. It should not be confused with polybutene, a low molecular weight oligomer with a different repeat unit. Polybutylene is produced by polymerisation of 1-butene using supported Z...
   Found op http://en.wikipedia.org/wiki/Polybutylene
   
   
2. 
   polybutylene
   [n] - a polymer of butylene
   Found op http://www.webdictionary.co.uk/definition.php?query=polybutylene
   
   
3. 
   polybutylene
   polybutene noun a polymer of butylene; used in lubricants and synthetic rubber
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=polybutylene
   
   
4. 
   Polybutylene
   A type of plastic pipe (often gray in color) sometimes used in domestic water supply systems. Some polybutylene plumbing systems are been recalled due to a history of leaks and failure.
   Found op http://www.soundhome.com/glossary
   
   
5. 
   polybutylene
   1) A polymer of butylene 2) Butene 3) Butylene 4) Polybutene
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/polybutylene/1
   
   

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