SELF-LEVELING CEMENT COMPOSITION

• Main Authors: MASANAKA MASAFUMI, NISHIO HIDEYUKI, TOGASHI HIROYASU, ADACHI FUMIO, ICHIHASHI HIDEKI, TANAKA HIDEHO
• Format: Patent
• Language: English
• Published: 23.05.2000
• Edition: 7
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To obtain excellent quickly hardening properties, working characteristics and hardening characteristics by using a composition prepared by mixing an inorganic component composed of Portland cement, alumina cement and gypsum in a specific ratio with a copolymer prepared by polymerizing a vinyl-based monomer mixture. SOLUTION: An inorganic component comprises Portland cement A, alumina cement B and gypsum C in the weight ratio of B/(A+B) of 0.05-0.4 and C/(A+B+C) of 0.02-0.45. A copolymer is obtained by polymerizing a mixture composed of one or more kinds of vinyl-based monomers D of formula I and one or more kinds of vinyl-based monomers E of formula II in the ratio of D/E (molar ratio) of 5/95-15/85 and has 2,000-500,000 weight-average molecular weight. The inorganic component in an amount of 100 pts.wt. is mixed with 0.1-9 pts.wt. of the copolymer. In the formula, R1 and R2 are each H or a methyl group; X is H or a 1-3C alkyl group; M is a monovalent or divalent cation; n is 110-150; m is 1 or 2.