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US 5,326,395 AGranted
Silica products
AssigneeUnilever Patent Holdings B.V.
InventorsDerek Aldcroft, Ian P. McKeown, Bryan Rogers, Peter W. Stanier
Life of this patent
Estimating the term…
Abstract
A silica matting agent has a wax coating comprising a mixture of three waxes, i.e. hard microcrystalline, plasticising monocrystalline and synthetic polyethylene. The use of this ternary mixture gives the matting agent improved interaction with lacquers and improved sedimentation.
Claims10
Wax coated amorphous silica matting agent characterised in that the wax coating is present in the range from about 5% to about 20% by weight of the matting agent and comprises
- i. from about 50% to about 90% by weight of a hard microcrystalline wax,
- ii. from about 5% to about 30% by weight of a plasticising microcrystalline wax, and
- iii. from about 5% to about 20% by weight of a synthetic polyethylene wax.
Dependencies are inferred from the claim text.