Wacker Chemie Ag

Wacker Silicones Corporation

Kathleen Beekel

Christine Klingler

Timothy Rummel

Keith Stowell

Andrew J Conti

Joel Kennard

Oliver H Zoellner

Organopolysiloxane release coatings employing a higher molecular weight organopolysiloxane crosslinker having Si&#x2014;H groups on not more than 67 mol percent of all siloxy groups of the organopolysiloxane crosslinker, and a lower molecular weight aliphatically unsaturated organopolysiloxane, cured by hydrosilylation with a hydrosilylation catalyst, produce strongly anchored release coatings which are able to be cured for shorter times and/or lower temperatures, and still offer a lower level of extractables than advanced release coatings employing precrosslinked unsaturated silicones.

Low temperature cure silicone release coatings

Crosslinkable compositions

Baking papers suitable for a wide range of baked goods have a non-stick coating prepared by coating a suitable substrate with an aqueous coating composition comprising an EVA copolymer dispersion and a hydrosilylation curing silicone emulsion, wherein the EVA copolymer dispersion has an EVA copolymer particle size of less than 500 nm and is surfactant-stabilized.

Baking paper coated with a silicone-containing emulsion

Low solvent and solvent-free silicone release coatings may be prepared with varying COF levels by incorporating a very high molecular weight, substantially non-reactive organopolysiloxane into a conventional curable release coating. By supplying the COF additive in the form of a relatively low viscosity master batch, adjustment of COF may be made by the coating applicator. Very low COF values can be obtained from tin-free, solvent-free coating systems, while at the same time, the coatings have very low extractables.

Additive for modifying the coefficient of friction of silicone release coatings and having low extractable silicone

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Adrian, MI, United States of America

Kathleen Beekel