Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing
Reexamination Certificate
2007-11-13
2007-11-13
Brunsman, David M. (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Carbohydrate or derivative containing
C106S018290, C106S781000, C162S177000
Reexamination Certificate
active
11219276
ABSTRACT:
An emulsion comprising water as the continuous phase, a wax as the discontinuous phase, an emulsifier and a preservative having the general structure:wherein R1can be a heterocycle containing nitrogen and sulfur, such as thiazolyl, isothiazolyl, or thiadiazolyl, which can optionally be substituted with C1–C6alkyl; R2can be hydrogen or C1–C6alkyl, specifically hydrogen; n is 0, 1, 2, or 3; each instance of R3can independently be hydrogen, C1–C6alkyl, phenoxy, C1–C6alkoxy, halo, amino, C1–C6alkylamino, di C1–C6alkyl amino, imidazolyl, thiazolyl, isothiazolyl, thiadiazolyl, thienyl, furyl, pyrryl, naphthyl, phenyl, halophenyl, C1–C6alkyl phenyl, or C1–C6alkoxyphenyl. The preservative may be added to the emulsion after the emulsion is formed. The emulsion can be incorporated into a gypsum product such as gypsum board or gypsum wood fiber board. The gypsum product may be made by forming a slurry containing gypsum, water, and the emulsion into a solid product. A method for improving the water resistance of a lignocellulosic composite product prepared by mixing lignocellulosic material with a binder to form a mixture and solidifying the mixture in a selected configuration to form the composite product may include adding to the mixture an emulsion as described above.
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Brunsman David M.
Hexion Specialty Chemicals, Inc.
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