Copolymers crosslinking at room temperature
AssigneeBASF SE
InventorsKarl Haeberle, Gerhard Bauer, Lothar Maempel
Life of this patent
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Abstract
Copolymers are composed of a) from 0.01 to 40% by weight of a copolymerized ethylenically unsaturated compound having at least one isocyanate group blocked with an oxime, b) from 30 to 99.99% by weight of at least one C.sub.1 -C.sub.20 -alkyl (meth)acrylate, one vinyl ester of carboxylic acids of 1 to 20 carbon atoms, one vinylaromatic of up to 20 carbon atoms, one ethylenically unsaturated nitrile of 3 to 6 carbon atoms, one vinyl halide or one nonaromatic hydrocarbon of 4 to 8 carbon atoms having at least 2 conjugated double bonds, c) from 0 to 30% by weight of at least one comonomer having at least one keto or aldehyde group and d) from 0 to 50% by weight of at least one further monomer.
Claims5
A copolymeric composition comprising:
- I, a copolymer composed of
- a) from 0.01 to 40% by weight of a copolymerized ethylenically unsaturated compound having at least one isocyanate group blocked with an oxime,
- b) from 30 to 99.99% by weight of at least one C.sub.1 -C.sub.20 -alkyl (meth)acrylate, one vinyl ester of carboxylic acids of 1 to 20 carbon atoms, one vinylaromatic of up to 20 carbon atoms, one ethylenically unsaturated nitrile of 3 to 6 carbon atoms, one vinyl halide or one nonaromatic hydrocarbon of 4 to 8 carbon atoms having at least 2 conjugated double bonds,
- c) from 0 to 30% by weight of at least one comonomer having at least one keto or aldehyde group, and
- d) from 0 to 50% by weight of at least one further monomer;
- II, a crosslinking agent selected from the group consisting of a compound which contains at least two keto or aldehyde groups, a compound which contains at least one keto and one aldehyde group, and a second polymer which contains at least one comonomer having at least one keto or aldehyde group;
- said polymeric composition being crosslinkable via transoximation between the oxime blocked isocyanate groups of said copolymer (I) and the keto or aldehyde groups of said crosslinking agent (II).
A polymeric composition comprising:
- I, a first copolymer composed of
- a) from 0.01 to 40% by weight of a copolymerized ethylenically unsaturated compound having at least one isocyanate group blocked with an oxime,
- b) from 30 to 99.99% by weight of at least one monomer selected from the group consisting of C.sub.1 -C.sub.20 -alkyl (meth)acrylates, vinyl esters of carboxylic acids of 1 to 20 carbon atoms, vinylaromatics of up to 20 carbon atoms, ethylenically unsaturated nitriles of 3 to 6 carbon atoms, vinyl halides and nonaromatic hydrocarbons of 4 to 8 carbon atoms having at least 2 conjugated double bonds,
- c) from 0 to 50% by weight of at least one further monomer, and
- II, a second polymer comprising a polymeric crosslinking agent comprising 30-99.99% by weight of monomers (b), 0.01-30% by weight of at least one comonomer having at least one keto or aldehyde group, and from 0 to 50% by weight of monomers (c);
- said polymeric composition being crosslinkable via transoximation between the oxime blocked isocyanate groups of said copolymer (I) and the keto or aldehyde groups of said copolymer (II).
Dependencies are inferred from the claim text.