| 摘要 |
A copolymer containing repeat units formed from the monomers (I) and (II), wherein each R<1>, if present, is independently hydrogen or hydrocarbyl; r is 0, 1 or 2; s is either 2 or 3; R<2>-R<4 >are each independently hydrogen or hydrocarbyl; R<5 >and R<6 >are each independently hydrogen, halo or hydrocarbyl; Pd<-> is the anion formed by loss of a proton from a proton donating group Pd-H; Z is either a bond or hydrocarbyl; R<7 >and R<8 >are each independently hydrogen, halo or hydrocarbyl; and either (a) A is an electron accepting group and W is either hydrogen or hydrocarbyl, (b) W is an electron accepting group and A is either a bond or hydrocarbyl or (c) both A and W are electron accepting groups. The invention also provides a method for preparing the copolymer by polymerising a mixture of (I) and (II) or their non-ionised precursors, preferably by exposure to ultraviolet radiation. The invention also relates to the uses of the copolymer in adhesive, coating, sealant and stereolithographic compositions.
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