Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
An encapsulated toner for heat-and-pressure fixing which is composed of a heat-fusible core containing at least a coloring material and a shell formed so as to cover the surface of the core, wherein the main component of the shell is a resin prepared by reacting an iso(thio)cyanate compound comprising (1) 0 to 30 mole % of monovalent isocyanate and/or isothiocyanate compounds and (2) 100 to 70 mole % of at least divalent isocyanate and/or isothiocyanate compounds with an active hydrogen compound comprising (3) 0 to 30 mole % of a compound having one active hydrogen atom reactive with isocyanate and/or isothiocyanate groups and (4) 100 to 70 mole % of a compound having at least two active hydrogen atoms reactive with isocyanate and/or isothiocyanate groups at a molar ratio of the components (1) and (2) to the components (3) and (4) of between 1 : 1 and 1 : 20, and wherein at least 30% of the whole linkages in which an isocyanate or isothiocyanate group participates are thermally dissociating linkages.
Claim 2
Dependent Claim
34 words
The encapsulated toner for heat-and-pressure fixing according to claim 1, wherein said thermally dissociating linkage is one formed by the reaction of a phenolic hydroxyl or thio group with an isocyanate or isothiocyanate group.
Claim 3
Dependent Claim
35 words
The encapsulated toner for heat-and-pressure fixing according to claim 1, wherein the main component of the heat-fusible core is a thermoplastic resin and the glass transition point assignable to the resin is 10 to 50°C.
Claim 4
Dependent Claim
18 words
The encapsulated toner for heat-and-pressure fixing according to claim 1, wherein the softening point is 80 to 150°C.
Claim 5
Dependent Claim
136 words
The encapsulated toner for heat-and-pressure fixing according to claim 2, wherein the compound having a phenolic hydroxyl group is at least one compound selected from among those represented by the following formulas (I), (II) and (III): wherein R₁, R₂, R₃, R₄ and R₅ each independently represent a hydrogen atom, an alkyl group having 1 to 9 carbon atoms, an alkenyl, alkoxy, alkanoyl, carboalkoxy or aryl group or a halogen atom; wherein R₆, R₇, R₈ and R₉ each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl, alkoxy, alkanoyl, carboalkoxy or aryl group or a halogen atom; wherein R₁₀, R₁₁, R₁₂ and R₁₃ each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl, alkoxy, alkanoyl, carboalkoxy or aryl group or a halogen atom.
Claim 6
Dependent Claim
24 words
The encapsulated toner for heat-and-pressure fixing according to claim 3, wherein the thermoplastic resin contained in the heat-fusible core is mainly a vinyl resin.
Claim 7
Dependent Claim
29 words
The encapsulated toner for heat-and-pressure fixing according to claim 2, wherein the isocyanate group to be reacted with a phenolic hydroxyl group is directly bonded to an aromatic ring.