Aqueous emulsion of (co)polymer made from monomer containing isocyanate group and olefinic double bond

A copolymer comprising a monomer having formula (1):

• (R.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO--L--).sub.q A(--NCOblock).sub.p (1)
• wherein
• R.sub.1, R.sub.2, and R.sub.3, which are the same or different, represent a hydrogen or a group selected from the group consisting of:
• hydrocarbon chains comprising 1 to 12 carbon atoms;
• halogens;
• and
• electron-withdrawing functional groups;
• L, which is the same or different, represents a divalent hydrocarbon radical comprising 2 to 12 carbon atoms;
• A represents an organic backbone which has n free valencies, n is a number between 2 and 7, and is equal to p+q;
• NCOblock represents a protected isocyanate functional group;
• p is a number between 1 and 6;
• and
• q is a number between 1 and 6, wherein said copolymer comprises greater than 5.times.10.sup.-2 equivalents of blocked isocyanate functional groups per kilogram of copolymer.