Polymer-coated precast concrete

US5215827A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Dotzauer · Frankenthal (Pfalz), DE
• Eckehardt Wistuba · Bad Dürkheim, DE
• Manfred Schwartz · Bischofswerda, DE
• Rolf Petri · Bischofswerda, DE
• Bertold Bechert
• Hans-Juergen Denu · Lampertheim, DE

Key dates

• Filing date: Dec 4, 1991
• Grant date: Jun 1, 1993
• Expiry date: Dec 4, 2011

Classification

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

Abstract

Precast concrete which is coated with a copolymer A with a glass transition temperature of rom -25.degree. to +30.degree. C. and composed of PA0 a) from 0.1 to 10% by weight of a monomer of the formula I ##STR1## where R.sup.1 and R.sup.2 are each --H or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is a bridge of from 1 to 20 carbons, PA1 R.sup.4 is --C(O)R.sup.6, --C(O)OR.sup.6 or -CN PA1 R.sup.5 is --H, --C(OR)R.sup.9, --C(O)OR.sup.9 or --CN PA1 X is --O-- or --NR.sup.7 --, PA1 Z is a single bond, --CH.sub.2 --, --O--, --NR.sup.8 -- or --O--C(O)-- and PA1 R.sup.6, R.sup.7, R.sup.8 and R.sup.9 are each --H, alkyl, aryl, alkaryl or aralkyl of up to 12 carbons, PA0 b) from 85 to 99.9% by weight of at least two monomers selected from the group comprising esters of acrylic and methacrylic acid with alcohols containing from 1 to 24 carbons, vinyl esters of carboxylic acids containing from 1 to 20 carbons, vinylaromatic compounds containing up to 20 carbons, ethylenically unsaturated nitriles containing from 3 to 6 carbons, vinyl halides, non-aromatic hydrocarbons containing from 2 to 8 carbons and at least one olefinic double bond and PA0 c) from 0 to 10% by weight of other copolymerizable tin-fre…