| abstract |
The invention relates to a process for the manufacture of coatings by radiocrosslinking. A radio-crosslinkable composition (C) is produced first of all by mixing at least one (meth)acrylic compound (A) with a reactive diluent system comprising at least one mono(meth)acrylic carbonate (B) corresponding to the general formula (I): <IMAGE> in which: R1 denotes H or CH3 R2 denotes an alkylene ether or alkylene chain which has a total number of carbon atoms of between 2 and 6, n denotes an integer between 1 and 6. The composition (C) is next applied onto a substrate and is then radiocrosslinked, preferably using UV radiation. Another subject of the invention is the crosslinkable compositions (C) in which the compound (A) and the carbonate (B) are not simultaneously 2,3-carbonyldioxypropyl 2-methacryloyloxyethyl carbonate, and carbonates of general formula (I) in which R2 denotes (CH2)m and in which m and n are integers such that 2</=m</=6, 1</=n</=6 and n NOTEQUAL 1 when m=2 and R1 denotes CH3. The carbonates of general formula (I) are highly photosensitive, and this allows irradiation times which are very markedly shorter than those used hitherto with mono(meth)acrylic diluents, or else makes it possible to photocrosslink in the absence of photoinitiator. |