Cyclodextrin derivatives and method for preparing the same, photoresist composition and display device

A photoresist composition, comprising:

• 2.3 to 8.6 parts by weight of a α-cyclodextrin modified polymerizable monomer;
• 10 to 20 parts by weight of a polymerizable monomer with high functionality;
• 3.2 to 15.8 parts by weight of an alkali-soluble resin;
• 15 to 30 parts by weight of a pigment dispersion;
• 0.1 to 0.8 parts by weight of a photoinitiator;
• and
• 20 to 30 parts by weight of an organic solvent,
• wherein the α-cyclodextrin modified polymerizable monomer has a structure represented by the following formula I or I′:
• wherein k is any integer selected from 2-6, n is any integer selected from 1-3, R is an aromatic ring having 5 to 30 carbon atoms, R′ is a multivalent straight or branched carbon chain having 5 to 30 carbon atoms which is optionally interrupted by an oxygen atom.

A color photoresist obtained from a photoresist composition comprising:

• 2.3 to 8.6 parts by weight of a α-cyclodextrin modified polymerizable monomer;
• 10 to 20 parts by weight of a polymerizable monomer with high functionality;
• 3.2 to 15.8 parts by weight of an alkali-soluble resin;
• 15 to 30 parts by weight of a pigment dispersion;
• 0.1 to 0.8 parts by weight of a photoinitiator;
• and
• 20 to 30 parts by weight of an organic solvent,
• wherein the α-cyclodextrin modified polymerizable monomer has a structure represented by the following formula I or I′:
• wherein k is any integer selected from 2-6, n is any integer selected from 1-3, R is an aromatic ring having 5 to 30 carbon atoms, R′ is a multivalent straight or branched carbon chain having 5 to 30 carbon atoms which is optionally interrupted by an oxygen atom.

A display apparatus comprising a color photoresist obtained from a photoresist composition which comprises:

• 2.3 to 8.6 parts by weight of a α-cyclodextrin modified polymerizable monomer;
• 10 to 20 parts by weight of a polymerizable monomer with high functionality;
• 3.2 to 15.8 parts by weight of an alkali-soluble resin;
• 15 to 30 parts by weight of a pigment dispersion;
• 0.1 to 0.8 parts by weight of a photoinitiator;
• and
• 20 to 30 parts by weight of an organic solvent,
• wherein the α-cyclodextrin modified polymerizable monomer has a structure represented by the following formula I or
• wherein k is any integer selected from 2-6, n is any integer selected from 1-3, R is an aromatic ring having 5 to 30 carbon atoms, R′ is a multivalent straight or branched carbon chain having 5 to 30 carbon atoms which is optionally interrupted by an oxygen atom.

A method for preparing a α-cyclodextrin modified polymerizable monomer, comprising:

• Step A:
• performing an esterification reaction of α-cyclodextrin and p-toluenesulfonyl chloride under basic condition to form mono-(6-p-toluenesulfonyl)-α-cyclodextrin according to the chemical equation as below:
• Step B:
• performing a substitution reaction of mono-(6-p-toluenesulfonyl)-α-cyclodextrin and polyamine compounds II to form compound III according to the chemical equation as below:
• Step C:
• performing an addition reaction of compound III and polymerizable monomer IV or IV′ to form a compound represented by formula I or I′ according to the chemical equation as below:
• wherein k is any integer selected from 2-6, n is any integer selected from 1-3, R is an aromatic ring having 5 to 30 carbon atoms, R′ is a multivalent straight or branched carbon chain having 5 to 30 carbon atoms which is optionally interrupted by an oxygen atom.