Wax formulations for lignocellulosic products, methods of their manufacture and products formed therefrom
AssigneeMomentive Specialty Chemicals Inc.
InventorsSteven Wantling, Bonnie Zepka, Michael Greno, Thomas Donlon
Life of this patent
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Abstract
The present invention is directed to a wax formulation for use in lignocellulosic products, which impart improved properties such as dimensional stability when the products are exposed to moisture. The wax formulations include a wax and a surface tension/interfacial tension reducing agent comprising one or more of a fluorinated compound having two to six carbon atoms, an alkylphenol alkoxylate or an ethoxylated acetylenic diol.
Claims15
A wax formulation comprising
- a wax and
- a surface tension/interfacial tension reducing agent, wherein the surface tension/interfacial tension reducing agent is a fluorinated compound having two to six carbon atoms, an alkylphenol alkoxylate, a C2-C3 alkoxylated, substantially symmetrical acetylenic diol having 6 to about 100 carbon atoms, a combination of a C2-C3 alkoxylated, substantially symmetrical acetylenic diol having 6 to about 100 carbon atoms and a siloxane or a combination comprising one or more of the foregoing surface tension/interfacial tension reducing agents.
A wax emulsion comprising, based on the total weight of the emulsion:
- about 25 to about 80 wt % of water;
- about 20 to about 60 wt % of a wax component;
- about 0.5 to about 5 wt % of an emulsion stabilizing component;
- and
- a surface tension/interfacial tension reducing agent, wherein the surface tension/interfacial tension reducing agent is
- a fluorinated compound having two to six carbon atoms, present in an amount of 0.0125 to 0.04 wt %;
- an alkylphenol alkoxylate, present in an amount of 0.0125 to 0.075 wt %;
- a C2-C3 alkoxylated, substantially symmetrical acetylenic diol having 6 to about 100 carbon atoms, present in an amount of 0.025 to 0.075 wt %;
- or
- a combination of a C2-C3 alkoxylated, substantially symmetrical acetylenic diol having 6 to about 100 carbon atoms and a siloxane, present in an amount of 0.025 to 0.075 wt %.
A method for making a wax emulsion, comprising combining an emulsifiable wax, an aqueous medium, and an emulsion stabilizer to form a mixture, and agitating the mixture to form an emulsion then adding a surface tension/interfacial tension reducing agent after the emulsion is formed, wherein the surface tension/interfacial tension reducing agent is a fluorinated compound having two to six carbon atoms, an alkylphenol alkoxylate, a C2-C3 alkoxylated, substantially symmetrical acetylenic diol having 6 to about 100 carbon atoms, a combination of a C2-C3 alkoxylated, substantially symmetrical acetylenic diol having 6 to about 100 carbon atoms and a siloxane or a combination comprising one or more of the foregoing surface tension/interfacial tension reducing agents.
Dependencies are inferred from the claim text.