AQUEOUS COMPOSITION CONTAINING COLLOIDAL SILICA AND ALKOXYSILANE AND/OR SILANOL-GROUP-CONTAINING COMPOUND

• Main Authors: YU POLI C, ROESLER RICHARD R, KLEER JOSEPH R, CORSO WILLIAM A
• Format: Patent
• Language: English
• Published: 29.08.2000
• Edition: 7
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To obtain an aqueous dispersion or solution having a prolonged pot life by adding colloidal silica to an alkoxy-silane-group-containing compound. SOLUTION: The alkoxysilane-group-containing compound contains 0.5-15 wt.% alkoxysilane and/or silanol groups (MW 28, calculated as Si) and does not substantially contain an isocyanate group and a chemically introduced hydrophilic group. The alkoxysilane group is initially introduced by the reaction of a polyisocyanate with an amino compound represented by the formula (wherein X is an organic group nonreactive with an isocyanate group at lower than 100 deg.C provided at least one X is alkoxy; Y is 1-8C linear or branched alkylene; and R1 is an organic group inert to an isocyanate group at 100 deg.C or lower). Colloidal silica in an amount of 1-20 wt.% of the alkoxysilane-group- ontaining compound is added. The resultant aqueous composition is useful as a binder for a coating material, an adhesive or a sealant composition.