초록 ▼

The present invention relates to a curable composition having an oligomer, at least one monomer, and an amount of a substantially non-reactive oligomeric additive. The substantially non-reactive oligomeric additive is present in an amount effective to yield a cured product having a fracture toughnes

The present invention relates to a curable composition having an oligomer, at least one monomer, and an amount of a substantially non-reactive oligomeric additive. The substantially non-reactive oligomeric additive is present in an amount effective to yield a cured product having a fracture toughness value that is higher than the fracture toughness value of a cured product of an otherwise identical composition lacking the non-reactive oligomeric additive. The present invention also relates to coated optical fibers, optical ribbons or bundles, and telecommunication systems having the curable composition.

대표청구항 ▼

1. A curable composition comprising: an oligomer;at least one monomer; andan amount of a substantially non-reactive oligomeric additive that is effective to yield a cured product having a fracture toughness value that is higher than the fracture toughness value of a cured product of an otherwise ide

1. A curable composition comprising: an oligomer;at least one monomer; andan amount of a substantially non-reactive oligomeric additive that is effective to yield a cured product having a fracture toughness value that is higher than the fracture toughness value of a cured product of an otherwise identical composition lacking the non-reactive oligomeric additive, wherein the substantially non-reactive oligomeric additive has a structure or average structure according to formulae (I), (II), or (III) CAP1—RT′—OOC—NH—R1—NH—COO—RT′—CAP1  (I)RM—[OOC—NH—RA—NH—COO—RT′—CAP1]n  (II)CAP1—RT′—OOC—NH—R1—NH—[COO—R2—OOC—NH—R1—NH]w—COO—RT′—CAP1  (III)wherein RT′—CAP1 is the reaction product of a moiety (RT) having a reactive terminus and a capping moiety comprising a functional group that reacts with the reactive terminus, wherein RT′—CAP1 has a non-reactive terminus,R1 is a polyisocyanate core moiety substantially free of urethane bonds,RA is R1 or —R1—(NH—COO—RC—OOC—NH—R1)t— where RC is a polyol-containing core moiety and t has an average value in the range of 0 to about 4,RM is a core moiety having an average functionality of n, where n is greater than 2.2,R2 includes either at least one crystallizable polyol-derived moiety or at least one cyclic rigid moiety, andw is greater than zero. 2. The composition according to claim 1, wherein the curable composition is radiation curable. 3. The composition according to claim 1, wherein the substantially non-reactive oligomeric additive comprises up to about 20% of the composition. 4. The composition according to claim 1, wherein the substantially non-reactive oligomeric additive comprises up to about 10% of the composition. 5. The composition according to claim 1, wherein the cured product of the curable composition is characterized by a fracture toughness value of at least about 1.1 Mpa·m1/2. 6. The composition according to claim 1, wherein the cured product of the curable composition is characterized by a defect sensitivity value (a*) greater than about 200 μm. 7. The composition according to claim 1, wherein the cured product of the curable composition is characterized by a fracture toughness value of at least about 1.1 Mpa·m1/2 and a defect sensitivity value (a*) greater than about 200 μm. 8. The composition according to claim 1, wherein the cured product of the curable composition is characterized by a Young's modulus of at least about 1200 MPa. 9. The composition according to claim 1, wherein the cured product has a Young's modulus that is substantially the same as the Young's modulus of the cured product of an otherwise identical composition lacking the non-reactive oligomeric additive. 10. The composition according to claim 1, wherein the cured product has a glass transition temperature (Tg) that is substantially the same as the glass transition temperature (Tg) of the cured product of an otherwise identical composition lacking the non-reactive oligomeric additive. 11. A curable composition comprising: an oligomer;at least one monomer; andan amount of a substantially non-reactive oligomeric additive that is effective to yield a cured product having a fracture toughness value that is higher than the fracture toughness value of a cured product of an otherwise identical composition lacking the non-reactive oligomeric additive, wherein the substantially non-reactive oligomeric additive has a structure or average structure according to formulae (IV), (V), or (VI) CAP2—X—OCN—R1—NCO—X—CAP2  (IV)RM—[OOC—NH—RA—NCO—X—CAP2]n  (V)CAP2—X—OCN—R1—NH—[COO—R2—OOC—NH—R1—NH]W—CO—X—CAP2  (VI)wherein CAP2—X— is a capping moiety having a non-reactive terminus,X is S, O, or N,R1 is a polyisocyanate core moiety substantially free of urethane bonds,RA is R1 or —R1—(NH—COO—RC—OOC—NH—R1)t— where RC is a polyol-derived core moiety and t has an average value in the range of 0 to about 4,RM is a core moiety having an average functionality of n, where n is greater than 2.2.R2 includes either at least one crystallizable polyol-containing moiety or at least one cyclic rigid moiety, andw is greater than zero. 12. The composition according to claim 11, wherein the substantially non-reactive oligomeric additive comprises up to about 10% of the composition. 13. The composition according to claim 11, wherein the cured product of the curable composition is characterized by a fracture toughness value of at least about 1.1 MPa·m1/2. 14. The composition according to claim 11, wherein the cured product of the curable composition is characterized by a defect sensitivity value (a*) greater than about 200 μm. 15. The composition according to claim 11, wherein the cured product of the curable composition is characterized by a Young's modulus of at least about 1200 MPa. 16. The composition according to claim 11, wherein the cured product has a Young's modulus that is substantially the same as the Young's modulus of the cured product of an otherwise identical composition lacking the non-reactive oligomeric additive.