Tin Stabiliser

Tin Stabilisers are generally used as heat stabilisation for PVC. They constitute a central tin atom surrounded by Alkyl or Acid groups. Commercial Tin Stabilisers have mono and di alkyl salts mixed in varying ratios. Tin Heat Stabilisers for PVC can be classified into two categories namely, Thio Acid half-Esters, and Dicarboxylic half Esters. Thio Acid half-Esters are also known as Thiotins or Mercaptides. Dicarboxylic half Esters are also called Maleates or Carboxylates. Tin Stabilisers are mostly based on Methyl, Butyl, or Octyl groups. Tin Stabilisers are available both in Solid as well as Liquid form. Solid forms may be Paste or Solvent-free form. Tin Stabilisers have wide applications in plasticized PVC because they can be easily handled and integrated with liquid plasticiser dosing systems. 

Usage

Tin Stabilisers used in PVC compounds are used for making sheets, bottles, profiles, injection moulded fittings, credit cards, blister packs, food containers, and display trays. They are also used for making PVC Pipes and Fittings, PVC Films, Hose Pipes, and Soft Tubes. Other applications include manufacture of Crystal PVC sheets, blow moulding, calendaring, extrusion etc. Tin Stabilisers are not suited for skin contact which is why they are strictly excluded from applications where skin contact is present, even if there is a need. However, there are some food applications of Tin Stabilisers, never exceeding 2%. Tin Stabilisers are an excellent heat stabiliser replacement for toxic heat stabilisers that were previously used in PVC compounds. Tin Stabilisers are also mixed with Vinyl Polymers to create finished products.