C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
167/310, 48/47,
C08K 3/26 (2006.01) C08J 9/08 (2006.01) C09K 3/00 (2006.01)
Patent
CA 1184000
ABSTRACT The present invention relates to a process for expanding thermoplastic polymer compositions notably those containing polymers having processing temperatures in excess of 200°C and/or containing an ingredient which is susceptible to ammonia, characterised in that as the blowing agent certain carbonates (notably zinc carbonate) are used. Preferably a nucleating agent and a weak acid are present to aid cell formation. The invention also includes expandable polymer compositions and blowing agent formulations containing the carbonates.
223820
Collington Kenneth T.
Gibson Peter J.
Puri Rishi R.
Fisons Limited
Ridout & Maybee Llp
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