C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/00 (2006.01) A61J 1/05 (2006.01) A61L 31/00 (2006.01) C08K 5/098 (2006.01) C08K 5/1515 (2006.01) C08K 5/56 (2006.01) C08K 11/00 (2006.01) C08L 27/06 (2006.01)
Patent
CA 2113814
The present invention provides an additive system for vinyl chloride polymer formulations to improve both the processing of the formulations and the functional characteristics of medical products made from the formulations. The additive system sur- prisingly exceeds previously known systems with respect to the melt fabrication and heat stability of the polymer formulations and the desired product characteristics of the products manufactured from such materials. Preferably, the additive system of the present invention comprises optimal amounts of the combination of a zinc raft primary stabilizer with an epoxide secondary stab- ilizer and a polyethylene external lubricant. Other processing aids and performance additives such as bases, antioxidants and in- ternal lubricants; may be included. The additive system can be utilized with either plasticized or non-plasticized vinyl chloride po- lymer formulations.
Buan Lillian
Laurin Dean
Baxter International Inc.
Sim & Mcburney
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