Calking and sealing composition containing block copolymers

• Main Author: GRASLEY MICHAEL H
• Format: Patent
• Language: English
• Published: 13.06.1967
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES

A sealing composition comprises a block copolymer of the formula A-B-A, where each A is a polymer block of a vinyl substituted aromatic hydrocarbon having an average molecular weight of 8,000 to 45,000 and B is a polymer block of a conjugated diene having an average molecular weight of 35,000 to 150,000, or a hydrogenated derivative thereof, together with, based on 100 parts by weight of said copolymer, (a) 75 to 200 parts by weight of a liquid hydrocarbon boiling between 100 DEG and 175 DEG C., (b) 50 to 175 parts by weight of a resin which is a hydrogenated rosin, terpene resin, polymerized rosin, pentaerythritol ester of rosin, polyalkene, or a mixture thereof, (c) 15 to 50 parts by weight of an alkylated dimethylol phenol-formaldehyde resin, (d) 150 to 400 parts by weight of a filler selected from alkaline earth metal carbonates, oxides and clays having average particle diameters between 5 and 75 microns, (e) 10 to 300 parts by weight of a filler selected from silicas, alkaline earth metal oxides and carbonates having average particle diameters between 0.005 and 1 micron, and (f) 0 to 50 parts by weight of a mineral oil. Optionally, the composition may contain antiozonants, antioxidants, colouring materials, and masking agents. The compositions may be used for sealing the joints between concrete slabs of a curtain wall building.