Water-repellent composition
AssigneeNippon Oil Co., Ltd.
InventorNobuo Imai
Life of this patent
Estimating the term…
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.
Claims21
A water-repellent composition comprising, as essential components, (a) a wax having a melting point of from 50.degree. to 90.degree. C., (b) a hydrocarbon resin, (c) an alkali metal salt of a condensation product of .beta.-naphthalene sulfonic acid with formalin, and (d) an alkali salt of polyacrylic acid, said components (a) to (d) being emulsified in water.
The composition according to 15, wherein the components (a) to (e) are emulsified in 0.8 to 10 times by weight of water.
Dependencies are inferred from the claim text.