Process for coloring concrete
AssigneesToyoko Giken Co., Ltd., Nikko Chemical Institute Inc.
InventorsNobuyuki Sakamoto, Takehiko Kobayashi, Takashi Horiguchi
Life of this patent
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Abstract
A concrete coloring material and a process for coloring concrete by means of such a concrete coloring material capable of permitting concrete to exhibit natural color or aesthetic properties while preventing concrete from being substantially discolored. Polyethylene oxide is used as a water-soluble adhesive or gIue. The oxide is mixed with a composition such as dye, pigment, a mixture thereof or the like, to thereby permit the composition to penetrate into the concrete.
Claims4
A process for coloring concrete comprising the steps of:
- providing a pattern formwork for concrete having a textured concrete contact surface;
- applying a concrete penetration layer of about 30 to about 200 .mu.m in thickness to the concrete contact surface of the pattern formwork;
- placing the pattern formwork in spaced relation to a panel;
- placing concrete in the space between the pattern formwork and the panel;
- curing the concrete;
- and
- releasing the pattern formwork from the concrete,
- wherein said concrete penetration layer comprises:
- a) polyethylene oxide having a molecular weight of about 100,000 to about 5,000,000, said polyethylene oxide prepared by ring opening polymerization of ethylene oxide, and
- b) a composition containing an additive selected from the group consisting of dyes, pigments and mixtures thereof.
A process for coloring concrete comprising the steps of:
- providing a pattern formwork for concrete having a textured concrete contact surface;
- applying a concrete penetration layer of about 30 to about 200 .mu.m in thickness to the concrete contact surface of the pattern formwork;
- placing the pattern formwork in spaced relation to a panel;
- placing concrete in the space between the pattern formwork and the panel;
- curing the concrete;
- and
- releasing the pattern formwork from the concrete,
- wherein said concrete penetration layer comprises:
- a) polyethylene oxide having a molecular weight of about 100,000 to about 5,000,000, said polyethylene oxide prepared by ring opening polymerization of ethylene oxide,
- b) a composition containing an additive selected from the group consisting of dyes, pigments and mixtures thereof, and
- c) a surface-active agent prepared by fermentation and serving as a dispersant for the composition.
Dependencies are inferred from the claim text.