Asphalt release agents and use thereof
AssigneeWacker Silicones Corporation
InventorsEugene R. Martin, Michael L. Coffey
Life of this patent
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Abstract
Asphalt release coatings are prepared by applying an aqueous emulsion containing an organopolysiloxane component, an effective amount of one or more emulsifying surfactants, and most minor amount of a multiple release additive. The compositions exhibit improved release, particularly multiple releases, even with polymer modified asphalt binders.
Claims33
A process for the formation of an asphalt release-coating on a substrate, said process comprising applying to said substrate an aqueous asphalt release coating emulsion comprising, in weight percent based on the weight of the emulsion:
- a) from about 1 to about 30 percent of an organopolysiloxane component;
- b) an amount of one or more surfactants effective to form a stable aqueous emulsion of said organopolysiloxane component;
- and
- c) from about 0.01 percent to about 10 percent of a multiple release additive.
An aqueous asphalt release composition, comprising, in weight percent:
- a) from about 1 percent to about 30 percent of an organopolysiloxane component comprising a mercaptoalkyl-functional organopolysiloxane;
- b) one or more surfactants in an amount effective to from a stable emulsion of said organopolysiloxane component;
- and
- c) from about 0.01 percent to about 10 percent of a multiple release additive.
An aqueous asphalt release composition, comprising, in weight percent:
- a) from about 5 to about 30 percent of an organopolysiloxane component;
- b) an amount of one or more surfactants effective to form a stable aqueous emulsion of said organopolysiloxane component;
- and
- c) from about 0.01 percent to about 10 percent of a multiple release additive.
An aqueous asphalt release composition, comprising, in weight percent:
- a) from about 1 percent to about 30 percent of an organopolysiloxane component comprising a mercaptoalkyl-functional organopolysiloxane;
- b) one or more surfactants in an amount effective to from a stable emulsion of said organopolysiloxane component;
- and
- c) from about 0.01 percent to about 10 percent of a multiple release additive;
- wherein said emulsion is free of volatile organic solvents.
Dependencies are inferred from the claim text.