Metallic Stearates

PVC Industry

Metalic Stearates

Lead Stearates are used in the manufacture of PVC Stabilisers. Calcium, Magnesium and Zinc Stearates are use in the processing and manufacture of polymers, paint and rubber.

Dibasic Lead Stearate (DBLS) is produced and supplied as a fine off-white powder, with a lead (Pb) content of 51.5%. DBLS finds its main use as a high temperature lubricant in PVC compounds. It also possesses good heat stabilising properties, particularly when used in conjunction with other lead stabilisers..

Normal Lead Stearate (NLS) is produced and supplied as a fine white powder, with a slightly greasy texture and a lead (Pb) content of 27%. NLS is used almost exclusively in the PVC industry. Whilst possessing some heat stabilising properties, it is used primarily as a lubricant in PVC compounding.

Calcium Stearate is produced and supplied as a fine white powder. It is completely insoluble in water, low molecular weight alcohols, esters and ketones, and only slightly soluble in aromatic compounds. It is known to be completely non-toxic.

Calcium Stearate has a large number of industrial applications:

  • As a lubricant in PVC compounds, and as a stabiliser in conjunction with other metallic soaps
  • As a lubricant in the production and processing of polyolefins
  • In the paper coating industry
  • As a mould release agent
  • As an anti-caking agent

Zinc Stearate is produced and supplied in a number of grades – Ordinary, Laq and Wettable. It is a fine white powder that is completely insoluble in water, low molecular weight alcohols, esters and ketones, and is only slightly soluble in aromatic substances. It is known to be completely non-toxic.

Zinc Stearate has a large number of industrial applications:

Ordinary Grade

  • As a non-toxic stabiliser in PVC, usually in conjunction with Calcium Stearate
  • As a lubricant in the production and processing of polyolefins
  • As a mould release agent for polyester, melamine, urea and phenolic resins
  • As a flatting agent in paint

Laq Grade

  • As a flatting agent in paint
  • As a component in the rubber vulcanising process

Wettable Grade

  • As an anti-tack agent in rubber processing

Magnesium Stearate is non-toxic and insoluble in water, low molecular weight alcohols, ester and ketones, but soluble in aromatic compounds. It is a fine white powder

Magnesium Stearate has a large number of industrial applications:

  • Cosmetics as a foam regulator and to add pearlescence to shampoos
  • Release agent in various resin systems
  • As a lubricant in deep drawing emulsions
  • Hydrophobing agent in fire extinguisher powders
  • Binding and mould release agent in dry powder pressure mouldings