Buna® CB 70 GPT Lithium Butadiene Rubber.

The rubber is protected by a stabiliser system which is in chemical compliance with the FDA regulation §177.2600 "Rubber articles intended for repeated use", the recommendation VI of the Federal Institute for Risk Assessment and the Commission Regulation (EU) No 10/2011 and amendments until today.


Mooney (1+4 @100°C) : 69.5

SV (5.43% in toluene) : 250 cp

Buna® CB 70 GPT is used for the production of HIPS particularly to attain an improved stress cracking resistance. It can be used either alone or in blend with Buna® CB 565 T or SB-Polymers to achieve polystyrene with improved surface gloss.
Buna® CB 70 GPT rubber is soluble in aliphatic hydrocarbons, styrene, toluene, tetrahydrofurane, cyclohexane, methylene chloride and 1,1,1-trichloro-ethane, and is insoluble in alcohols and water.
  • HIPS industry

Technical Data sheet

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Sergio Botafogo
Commercial Contact

Phone: +55 21 2677 1344
Fax: +55 21 99628 3875

Esther Han
Technical Service - APAC

Phone: +65 6725 5777

David Hardy
Technical Service - EMEA

Phone: +49 221 8885 6307

Marcus Moutinho
Technical Service - LATAM

Phone: +55 21 2677 1219

Sharon Guo
Technical Service - NAFTA

Phone: +1-519-953-1728