Paintable organopolysiloxane mold release compositions and processes for their use
AssigneeWacker Silicones Corporation
InventorEugene R. Martin
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Abstract
Silicone mold release compositions which are a stable blend of hydrophobic-modified organopolysiloxane and an aminoorgano- or mercaptoorgano-functional organopolysiloxane, or a solution in organic solvent of a stable or unstable blend, provide exceptional mold release properties while retaining paintability of molded parts.
Claims19
A neat mold release composition providing for molded part paintability, comprising a stable blend of hydrophobic-modified organopolysiloxane and an organofunctional organopolysiloxane, said organofunctional organopolysiloxane containing aminoorgano-functional, mercaptoorgano-functional, or both aminoorgano- and mercaptoorgano-functional groups.
A solvent-based mold release for producing paintable molded parts, comprising an unstable neat blend of a hydrophobic organopolysiloxane and an organofunctional organopolysiloxane selected from the group consisting of aminoorgano-functional, mercapto organo-functional, and both amino- and mercaptoorgano-functional organopolysiloxanes, dissolved in a solvent, wherein said hydrophobic-modified organopolysiloxane contains x siloxy groups of the formula
- and y siloxy groups of the formula
- wherein R3 is an aryl or aralkyl group, R4 is a C8-20 alkyl group, and x and y are positive whole numbers from 3 to 250.
Dependencies are inferred from the claim text.