| 摘要 |
There is provided a process for the preparation of a polymerisable compositi on comprising a cross-linker and a polymerisable monomer of formula (I) comprising the steps of: (i) contacting a compound of formula (II) with an immobilised acid, wherein X, Y, Z, R1, P and Q are independently selected from a hydrocarbyl group or hydrogen and wherein A is (CH2)n wherein n is 0 or 1; (ii) neutralising the product of step (i) such that the cross-linker is formed.
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