Stabilizers for halogen containing polymers

Details Stabilizers for halogen containing polymers Stabilizers for halogen containing polymers

C - Chemistry, Metallurgy

08

L

31/71, 400/9333

C08L 27/00 (2006.01) C08K 3/32 (2006.01) C08K 5/00 (2006.01) C08K 5/56 (2006.01) C08K 5/58 (2006.01) C08L 27/06 (2006.01)

Patent

CA 2002256

C-1535 IMPROVED STABILIZERS FOR HALOGEN-CONTAINING POLYMERS ABSTRACT Improved stabilizer compositions are provided which impart significant long-term heat stabilization to halogen-containing vinyl polymers such as polyvinyl chloride. The improved stabilizer compositions combine one or more metal-containing primary stabilizer compounds with a finely divided co-stabilizing phosphate material of a predetermined surface area. The phosphate material includes an anhydrous or hydrous sodium or potassium monohydrogen phosphate, lithium dihydrogen phosphate, or alkali-metal pyrophosphate. The novel combination of stabilizers enables a reduction in the amount of metal- containing stabilizer, if desired, while still yielding long-term stability in the resultant polymer, or provides the ability to raise process temperature and reduce cycle times of molding operations.

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