US 2019/0041751 Al  7  Feb. 7,2019  mercially or made by a variety of methods known in the art,  such as is disclosed in U.S. Pat. Nos. 6,136,501; 6,379,861;  and 6,855,475.  [  0025]  Other preferred monomers of formula ( 5) are those  of formula (7)  (7)  [0026]  In one preferred embodiment, the organic polymer  comprises as polymerized units, one or more unsaturated  monomers comprising a chromophore. Suitable chro› mophores are any aromatic (or aryl) moiety that absorbs  radiation at the wavelength of interest. Such chromophores  are unsubstituted aromatic moieties, such as phenyl, benzyl,  naphthyl, anthracenyl, and the like, or may be substituted  with one or more of hydroxyl, C$_{1}$ _ $_{10}$-alkyl, C$_{2}$ _ $_{10}$-alkenyl,  C$_{2}$_$_{10}$-alkynyl, and C$_{5}$_$_{30}$-aryl, and preferably is unsubsti› tuted or hydroxyl-substituted. When an unsaturated chro› mophore-containing monomer having a hydroxy-substituted  aryl moiety is used, it will be appreciated by those skilled in  the art that such monomer is a first unsaturated monomer as  described above. Preferably, the organic polymer comprises  as polymerized units, one or more unsaturated monomers of  formula (4) having a chromophore moiety, where such  chromophore moiety is not a hydroxyaryl moiety. Preferred  chromophore moieties are chosen from fury!, pyryl, thio› phenyl, pyridyl, phenyl, naphthyl, acenaphthyl, fluorenyl,  carbazolyl, anthracenyl, phenanthryl, pyrenyl, coronenyl,  tetracenyl, pentacenyl, tetraphenyl, benzotetracenyl, triph› enylenyl, perylenyl, benzyl, phenethyl, tolyl, xylyl, styrenyl,  vinylnaphthyl, vinylanthracenyl, dibenzothiophenyl, thiox› anthonyl, indolyl, acridinyl, and the like, and more prefer› ably phenyl, naphthyl, anthracenyl, phenanthryl, benzyl, and  the like. Chromophores used in the present invention are free  of aromatic rings having a substituent of the structure  *----C(Rx)$_{2}$-O-Lg, each Rx is independently H or a alkyl  group of 1 to 15 carbons, where each Rx may be taken  together form an aliphatic ring; Lg is H, an aliphatic  monovalent hydrocarbon having 1 to 10 carbons, or a  monovalent aromatic group, and * indicates the point of  attachment to the aromatic ring. That is, the chromophores  do not have an aromatic ring having a substituent where an  sp3 hybridized carbon is bonded directly to the aromatic ring  and to an oxy group.  wherein R 21  is independently chosen from H, C$_{1}$ _ $_{4}$-alkyl,  C$_{1}$ _ $_{4}$-haloalkyl, halogen, and CN; and R$^{30 }$is a monovalent  organic residue having a lactone moiety. In formula (7), R 30  is a C$_{4}$ _ $_{20}$-monovalent organic residue comprising a lactone  moiety. R$^{30 }$may comprise any suitable lactone moiety, and  preferably comprises a 5 to 7-membered lactone, which may  be optionally substituted. Suitable substituents on the lac› tone ring are C$_{1}$_$_{10}$-alkyl moieties. Suitable lactone moieties  for R$^{30 }$are those having formula (8)  (8)  wherein E is a 5 to 7-membered ring lactone; each R 31  is  independently chosen from C$_{1}$ _ $_{10}$-alkyl; p is an integer from  0 to 3; Y is a chemical bond or a divalent linking residue  having from 1 to 10 carbon atoms; and * indicates the point  of attachment to the oxygen atom of the ester.  It  is preferred  that each R$^{31 }$is independently chosen from C$_{1}$_calkyl, and  more preferably C$_{1}$_$_{4}$-alkyl. Examples of R 31  are methyl,  ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, and iso-butyl.  Preferably, p=0 or 1. Suitable divalent linking residues for Y  include, but are not limited to, divalent organic residues  having from 1 to 20 carbon atoms. Suitable divalent organic  residues for Y include, without limitation, C$_{1}$ _ $_{20}$-hydrocarbyl  moieties, C$_{1}$ _ $_{20}$-heteroatom-containing hydrocarbyl moi› eties, and substituted C$_{1}$_$_{20}$-hydrocarbyl moieties. The term  "C$_{1}$ _ $_{20}$-heteroatom-containing hydrocarbyl moieties" refers  to hydrocarbyl moieties having one or more heteroatoms,  such as nitrogen, oxygen, sulfur, phosphorus, within the  hydrocarbyl chain. Exemplary heteroatoms include, but are  not limited to, ---0-, -S-, -N(H)-, -N(C$_{1}$ _ $_{20}$-hydro› carbyl)-,  ----C(=O)-O-, -S(=O)-, -S(=O)$_{2}$ -,  -C(=O)-NH-, and the like. "Substituted C$_{1}$ _ $_{20}$-hydro› carbyl moieties" refers to any hydrocarbyl moiety having  one or more hydrogens replaced with one or more substitu› ents such as halogen, cyano, hydroxy, amino, mercapto, and  the like.  It  is preferred that R 30  is chosen from gamma› butyrolactone (GBLO), beta-butyrolactone, gamma-valero› lactone, delta-valerolactone, and caprolactone, and more  preferably, R 30  is GBLO. Monomers of formula (7) are  generally commercially available or may be prepared by  methods known in the art.  [0027]  The present condensed polymers preferably com› prise an organic polymer chain comprising as polymerized  units one or more monomers of formula (1) and one or more  monomers of formula (3). The mole ratio of the total  monomers of formula (1) to the total monomers of formula  (3) is from 99:1 to 1:99, preferably from 95:5 to 5:95, more  preferably from 95:5 to 55:45, and yet more preferably from  90: 10 to 60:40.  It  is preferred that the total moles of the  monomers of formula (1) is greater than the total moles of  the monomers of formula (3).  It  is preferred that the present  condensed polymers comprise an organic polymer chain  comprising as polymerized units one or more monomers of  formula (1), one or more monomers of formula (3), and one  or more monomers of formula (4), more preferably one or  more monomers of formula (1 ), one or more monomers of  formula (3) and one or more monomers of formula (5), and  even more preferably one or more monomers of formula (1 ),  one or more monomers of formula (3), and one or more  monomers of formula (5a). When the present condensed  polymer comprises an organic polymer chain comprising as  polymerized units one or more monomers of formula (1),  one or more monomers of formula (3), and one or more  monomers of formula ( 4 ), the mole ratio of the total mono› mers of formulae (1) and (3) to the total monomers of  formula (4) is from 99:1 to 1:99, preferably from 90:10 to  10:90, and more preferably from 75:25 to 25:75.  It  is  preferred that the total moles of the monomers of formula ( 4)  is greater than either of the total moles of the monomers of  0  (R31)00  P  E  Y-* 