Curable resin compositions

An ultraviolet light or thermally curable resin composition, comprising:

• a predetermined mass ratio of a (meth)acrylate cyclosiloxane monomer and a non-siloxane (meth)acrylate based monomer ranging from about >0:<100 to about 80:20;
• from greater than 0 mass % to about 5 mass %, based on a total solids content of the resin composition, of an azo-initiator;
• a surface additive;
• and
• a solvent;
• wherein the resin composition is free of a photosensitizer.

An ultraviolet light curable resin composition, comprising:

• a predetermined mass ratio of a first epoxy cyclosiloxane monomer having a 1:1 ratio of Si:O in the cyclosiloxane and a second epoxy cyclosiloxane monomer having a 1:1 ratio of Si:O in the cyclosiloxane, wherein the first and second epoxy cyclosiloxane monomers are different, and wherein the predetermined mass ratio ranges from about 3:7 to about 7:3;
• bis-(4-methylphenyl)iodonium hexafluorophosphate as a first initiator;
• a second initiator selected from the group consisting of a free radical initiator and a cationic initiator other than bis-(4-methylphenyl)iodonium hexafluorophosphate;
• a surface additive;
• and
• a solvent.

A flow cell, comprising:

• a substrate;
• and
• a cured, patterned resin on the substrate, the cured, patterned resin including depressions separated by interstitial regions, and the cured, patterned resin including a cured form of a resin composition including:
• a predetermined mass ratio of a (meth)acrylate cyclosiloxane monomer and a non-siloxane (meth)acrylate based monomer ranging from about >0:<100 to about 80:20;
• from 0 mass % to about 10 mass %, based on a total solids content of the resin composition, of an initiator selected from the group consisting of an azo-initiator, an acetophenone, a phosphine oxide, a brominated aromatic acrylate, and a dithiocarbamate;
• a surface additive;
• and
• a solvent;
• wherein the cured, patterned resin has low or no autofluorescence when exposed to violet or blue excitation wavelengths ranging from about 375 nm to about 500 nm.

A flow cell, comprising:

• a substrate;
• and
• a cured, patterned resin on the substrate, the cured, patterned resin including depressions separated by interstitial regions, and the cured, patterned resin including a cured form of a resin composition including:
• a predetermined mass ratio of a first epoxy cyclosiloxane monomer having a 1:1 ratio of Si:O in the cyclosiloxane and a second epoxy cyclosiloxane monomer having a 1:1 ratio of Si:O in the cyclosiloxane, wherein the first and second epoxy cyclosiloxane monomers are different, and wherein the predetermined mass ratio ranges from about 3:7 to about 7:3;
• bis-(4-methylphenyl)iodonium hexafluorophosphate as a first initiator;
• a second initiator selected from the group consisting of a free radical initiator and a cationic initiator other than bis-(4-methylphenyl)iodonium hexafluorophosphate;
• a surface additive;
• and
• a solvent;
• wherein the cured, patterned resin has low or no autofluorescence when exposed to violet or blue excitation wavelengths ranging from about 375 nm to about 500 nm.