Polymer-coated precast concrete

Details Polymer-coated precast concrete Polymer-coated precast concrete

B - Operations, Transporting

32

B

B32B 13/12 (2006.01) C04B 41/48 (2006.01) C04B 41/63 (2006.01) C09D 133/06 (2006.01) E04D 1/16 (2006.01)

Patent

CA 2057768

O.Z. 0050/42105 Abstract of the Disclosure: Precast concrete which is coated with a copolymer A with a glass transition temperature of from -25 to +30°C and composed of a) from 0.1 to 10% by weight of a monomer of the formula I Image I where R1 and R2 are each -H or C1-C4-alkyl, R3 is a bridge of from 1 to 20 carbons, R4 is -C(O)R6, -C(O)OR6 or -CN R5 is -H, -C(O)R9, -C(O)OR9 or -CN X is -O- or -NR7-, Z is a single bond, -CH2-, -O-, -NR6- or -O-C(O)- and R6, R7, R8 and R9 are each -H, alkyl, aryl, alkaryl or aralkyl of up to 12 carbons, 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 c) from 0 to 10% by weight of other copolymerizable tin-free monomers, is produced as described.

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