US4140644A — Polyester toner compositions

Claim 1

Independent Claim 82 words

A dry electrographic developer composition comprising (1) a toner comprising a polyester resin that is the condensation product of from about 30 to about 85 mole percent 2,2-dimethyl-1,3-propanediol, from 15 to about 70 mole percent 2,2'-oxydiethanol and terephthalic acid or an ester forming derivative thereof, said polyester resin having an inherent viscosity of at least about 0.30 when measured at a concentration of 0.25 g/dl at 25° C. in a 1.1 by weight mixture of phenol:chlorobenzene, and (2) a particulate carrier vehicle.

Claim 2

Dependent Claim 82 words

A dry electrographic developer composition comprising (1) a toner comprising a polyester resin that is the condensation product of from about 30 to about 85 mole percent 2,2-dimethyl-1,3-propanediol, from 15 to about 70 mole percent 2,2'-oxydiethanol and terephthalic acid or an ester forming derivative thereof, said polyester resin having an inherent viscosity of at least about 0.30 when measured at a concentration of 0.25 g/dl at 25° C. in a 1.1 by weight mixture of phenol:chlorobenzene, and (2) a particulate carrier vehicle.

Claim 3

Dependent Claim 23 words

A composition of claim 1 wherein said polyester has a T g in the range from about 40° C. to about 80° C.

Claim 4

Dependent Claim 24 words

A composition of claim 1 comprising a dry, particulate electrographic toner which remains a free-flowing powder after incubation at 50° C for 48 hours.

Claim 5

Dependent Claim 16 words

A composition of claim 1 wherein said inherent viscosity is from about 0.30 to about 0.85.

Claim 6

Dependent Claim 33 words

A dry, particulate electrographic developer composition comprising (1) a toner comprising a polyester resin having the following formula: ##STR2## wherein n is from about 15 to about 50 and (2) ferromagnetic carrier particles

Claim 7

Dependent Claim 33 words

A dry, particulate electrographic developer composition comprising (1) a toner comprising a polyester resin having the following formula: ##STR2## wherein n is from about 15 to about 50 and (2) ferromagnetic carrier particles

Claim 8

Dependent Claim 24 words

A composition of claim 5 wherein said polyester resin has a T g in the range from about 55° C. to about 80° C.

Claim 9

Dependent Claim 21 words

A composition of claim 5 wherein said polyester resin remains a free-flowing powder after incubation at 50° C. for 48 hours.

Claim 10

Dependent Claim 38 words

A composition of claim 5 wherein said polyester resin has an inherent viscosity from about 0.40 to about 0.70 when measured at a concentration of 0.25 g/dl at 25° C. in a 1:1 by weight mixture of phenol:chlorobenzene.

Claim 11

Dependent Claim 97 words

A dry electrographic developer composition comprising (1) a particulate toner composition having a polyester resin that is the condensation product of from about 30 to about 85 mole percent 2,2-dimethyl-1,3-propanediol, from 15 to about 70 mole percent 2,2'-oxydiethanol and terephthalic acid or an ester forming derivative thereof, said polyester resin having an inherent viscosity of at least about 0.03 when measured at a concentration of 0.25 g/dl at 25° C. in a 1:1 by weight mixture of phenol:chlorobenzene, (2) a non-blocking agent to prevent clumping or caking of toner particles during storage and (3) ferromagnetic carrier particles.

Claim 12

Dependent Claim 97 words

A dry electrographic developer composition comprising (1) a particulate toner composition having a polyester resin that is the condensation product of from about 30 to about 85 mole percent 2,2-dimethyl-1,3-propanediol, from 15 to about 70 mole percent 2,2'-oxydiethanol and terephthalic acid or an ester forming derivative thereof, said polyester resin having an inherent viscosity of at least about 0.03 when measured at a concentration of 0.25 g/dl at 25° C. in a 1:1 by weight mixture of phenol:chlorobenzene, (2) a non-blocking agent to prevent clumping or caking of toner particles during storage and (3) ferromagnetic carrier particles.

Claim 13

Dependent Claim 31 words

The composition of claim 9 wherein said polyester resin has a T g in the range from about 40° C. to about 55° C. and said non-blocking agent is polystyrene powder.

Claim 14

Dependent Claim 66 words

A dry electrographic developer composition comprising a triboelectric mixture of a particulate toner composition comprising a polyester resin having the following formula ##STR3## wherein n is 15 to about 70, said polyester resin having an inherent viscosity of at least about 0.30 when measured at a concentration of 0.25 g/dl at 25° C. in a 1:1 by weight mixture of phenol:chlorobenzene, and a particulate carrier vehicle.

Claim 15

Dependent Claim 66 words

A dry electrographic developer composition comprising a triboelectric mixture of a particulate toner composition comprising a polyester resin having the following formula ##STR3## wherein n is 15 to about 70, said polyester resin having an inherent viscosity of at least about 0.30 when measured at a concentration of 0.25 g/dl at 25° C. in a 1:1 by weight mixture of phenol:chlorobenzene, and a particulate carrier vehicle.

Claim 16

Dependent Claim 39 words

A dry electrographic developer composition comprising a triboelectric mixture of (1) a particulate toner composition comprising a polyester resin having the following formula: ##STR4## wherein n is from about 15 to about 50 and (2) resin-coated ferromagnetic carrier particles.

Claim 17

Dependent Claim 39 words

A dry electrographic developer composition comprising a triboelectric mixture of (1) a particulate toner composition comprising a polyester resin having the following formula: ##STR4## wherein n is from about 15 to about 50 and (2) resin-coated ferromagnetic carrier particles.

Claim 18

Dependent Claim 55 words

In an electrographic process wherein a visible image is formed on a substrate by depositing toner on a charge pattern thereon and the image is fixed to the substrate by fusing the toner, the improvement wherein the toner comprises a polyester resin of the formula: ##STR5## wherein n is from about 15 to about 70.

Claim 19

Dependent Claim 55 words

In an electrographic process wherein a visible image is formed on a substrate by depositing toner on a charge pattern thereon and the image is fixed to the substrate by fusing the toner, the improvement wherein the toner comprises a polyester resin of the formula: ##STR5## wherein n is from about 15 to about 70.

Claim 20

Dependent Claim 46 words

A process of claim 13 wherein n is from about 15 to about 50 and said polyester resin has an inherent viscosity of at least about 0.30 when measured at a concentration of 0.25 g/dl at 25° C. in a 1:1 by weight mixture of phenol:chlorobenzene.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-02-19	1982-08-21	1983-02-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-02-19	1986-08-21	1987-02-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-02-19	1990-08-21	1991-02-20	$7700.00	Window Closed / Lapsed

Polyester toner compositions

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