Concrete roof tile

US5047295A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Dotzauer · Frankenthal (Pfalz), DE
• Rolf Dersch · Bischofswerda, DE
• Johannes Vinke · Hockenheim, DE
• Harutyun Hanciogullari · Schifferstadt, DE
• Manfred Schwartz · Bischofswerda, DE
• Volkmar Berg · Graben-Neudorf, DE

Key dates

• Filing date: Jan 8, 1990
• Grant date: Sep 10, 1991
• Expiry date: Jan 8, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31855
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A concrete roof tile is coated with an unfilled or aggregate- and/or pigment-filled film of a copolymer containing (a) from 0.03 to 2% by weight of tin in the form of a polymerizable organotin compound (b) from 0.5 to 5% by weight of (meth)acrylic acid, (meth)acrylamide and/or vinylsulfonic acid and (c) from 0.1 to 5% by weight of carbonyl-containing monomers crosslinked with certain dicarboxodihydrazides, besides (d) at least two (meth)acrylic esters of C.sub.1 -C.sub.8 alkanols and/or styrene as copolymerized units in such an amount and such mixing ratios that the copolymer has a glass transition temperature of -15 to +10.degree. C. prior to crosslinking.