| 摘要 |
PROBLEM TO BE SOLVED: To provide a photoimageable composition comprising a soft oligomer. SOLUTION: The oligomer has the formula: (CH2=C(H or CH3)-CO-X-R-CH (OZ)-CH2-O-ϕ-)2-C(CH3)2 [wherein R is a 1-40C alkylene group; X is absent or a diol having a mol.wt. of 50-2,800 selected from the group consisting of alkylene diols, polyester diols and polyether diols; and Z has the formula:-CO- NH-Y-NH-CO-O(-X'-O-CO-NH-Y-NH-CO-O)n-Q-O-CO-C(H or CH3)=CH2 [wherein Y is an alkylene or aromatic hydrocarbyl group; n is 1-4; X' is a diol selected from the group consisting of alkylene diols, polyester diols and polyether diols; and Q is a 2-6C alkylene group]]. |
