Water-repellent composition
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United States of America Patent
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Jun 9, 1992
Grant Date -
N/A
app pub date -
Apr 4, 1991
filing date -
Apr 7, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A composition having excellent water-repellent properties and stability in an emulsified state is provided. The composition contains a wax having a melting point of 50.degree. to 90.degree. C., a hydrocarbon resin, an alkali metal salt of a condensation product of .beta.-naphthalene sulfonic acid with formalin and an alkali salt of polyacrylic acid. These components are emulsified in water. The composition is especially useful as a waterproof agent fo gypsum boards and gypsum plaster.
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