초록

A hydrogel which comprises polymerized moieties derivable from (i) at least one polymerizable cyclic (thio)ether and (ii) at least one hydrophilic homo- or copolymer.

대표청구항 ▼

A hydrogel, which comprises: polymerized moieties derivable from (i) at least one unsaturated cyclic(thio) ether of the formula: [Figure] wherein R1, R2 and R4, which may be the same or different, each represent hydrogen or a substituted or unsubstituted hydrocarbyl or hydrocarbyloxy group; R3 repre

A hydrogel, which comprises: polymerized moieties derivable from (i) at least one unsaturated cyclic(thio) ether of the formula: [Figure] wherein R1, R2 and R4, which may be the same or different, each represent hydrogen or a substituted or unsubstituted hydrocarbyl or hydrocarbyloxy group; R3 represents a substituted or unsubstituted methylene, ethylene, or 1,3-propylene group; R5 represents a monovalent polymerizable group; Q represents an oxygen or sulfur atom; and X represents: [Figure] wherein Y represents an oxygen atom or an －NR6－group wherein R6 represents any of the values which R1 may assume; a is 0 or 1; b is 0 or 1; c is 1 or 2; d is 0 or 1; with the proviso that at least one of b or d is 1, and (ii) at least one hydrophilic homo- or copolymer. A hydrogel, which comprises: a polymerizate derived from the reaction of polyethylene oxide with an acrolein tetramer of the formula: [Figure]