| 摘要 |
<p>TTP dye sheets having a dye coat comprising a binder which comprises a mixture of a polyvinyl butyral polymer and a second polymer having, as at least 10 % of its monomeric units a monomeric unit of formula (I): -[H2C-CXY]- wherein X is H or methyl and Y is an optionally substituted phenyl group, a cyano group or an ester group of formula -CO2Z wherein Z is an optionally substituted C1 to C6 hydrocarbyl group provided that where Y is unsubstituted phenyl the second polymer also has a substituted styrene and/or a non-styrene monomeric unit are disclosed.</p> |
