Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
39 words
A toner for developing statically charged images, which has a substantially spherical shape and comprises a copolymer comprising, as a constituent, a water-soluble monomer having a group - SO₃X in which X stands for hydrogen, sodium, potassium or calcium.
Claim 2
Dependent Claim
39 words
A toner for developing statically charged images, which has a substantially spherical shape and comprises a copolymer comprising, as a constituent, a water-soluble monomer having a group - SO₃X in which X stands for hydrogen, sodium, potassium or calcium.
Claim 3
Dependent Claim
43 words
A toner for developing statically charged images according to claim 1, wherein the content of the water-soluble monomer having a group -SO₃X in which X stands for hydrogen, sodium, potassium or calcium is 0.05 to 5% by weight based on the total toner.
Claim 4
Dependent Claim
57 words
A process for the preparation of a toner for developing statically charged images, which comprises incorporating a copolymer comprising a water-soluble monomer having a group -SO₃X in which X stands for hydrogen, sodium, potassium or calcium and an oil-soluble monomer into a polymerizable composition comprising a polymerizable monomer, an initiator and a colorant, and suspension-polymerizing the composition.
Claim 5
Dependent Claim
57 words
A process for the preparation of a toner for developing statically charged images, which comprises incorporating a copolymer comprising a water-soluble monomer having a group -SO₃X in which X stands for hydrogen, sodium, potassium or calcium and an oil-soluble monomer into a polymerizable composition comprising a polymerizable monomer, an initiator and a colorant, and suspension-polymerizing the composition.
Claim 6
Dependent Claim
44 words
A process for the preparation of a toner for developing statically charged images according to claim 3, wherein the copolymer comprises 0.2 to 50% by weight of the water-soluble monomer having a group -SO₃X in which X stands for hydrogen, sodium, potassium or calcium.
Claim 7
Dependent Claim
94 words
A process for the preparation of a toner for developing statically charged images according to claim 3 or 4, wherein at the suspension polymerization, an acid or alkali is added to an aqueous phase where a fine powder of a hardly water-soluble inorganic salt is present, to once dissolve the fine powder of the hardly water-soluble inorganic salt, an alkali or acid is further added to the aqueous medium to precipitate ultrafine particles of the hardly water-soluble inorganic salt, and the polymerization is carried out in the aqueous phase containing said precipitated ultrafine particles.