Toner and two-component developer
US-2024337960-A1 · Oct 10, 2024 · US
Polyester resin for toner, toner, developer, and image formation device
US9785074B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9785074-B2 |
| Application number | US-201515116478-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 6, 2015 |
| Priority date | Feb 4, 2014 |
| Publication date | Oct 10, 2017 |
| Grant date | Oct 10, 2017 |
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- Title
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Abstract
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A polyester resin for a toner, the polyester resin including: a segment derived from an alcohol component; and a segment derived from a carboxylic acid component, wherein the alcohol component includes a trivalent or higher aliphatic alcohol, and wherein the polyester resin satisfies Expressions (1) to (3) below: 500 ≤ Weight average molecular weight ( Mw ) ( Valence of the trivalent or higher aliphatic alcohol ) × ( Amount of the trivalent or higher aliphatic alcohol ) ≤ 4 , 000 ; Expression ( 1 ) 4,000≦Weight average molecular weight (Mw)≦25,000 Expression (2); and 0.5≦(Amount of the trivalent or higher aliphatic alcohol)≦6.5 Expression (3), where, in the Expressions (1) and (3), the Amount of the trivalent or higher aliphatic alcohol denotes a percent by mole of the trivalent or higher aliphatic alcohol relative to the alcohol component.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polyester resin for a toner, the polyester resin comprising: a segment derived from an alcohol component; and a segment derived from a carboxylic acid component, wherein the alcohol component comprises a trivalent or higher aliphatic alcohol, and wherein the polyester resin satisfies Expressions (1) to (3) below: 500 ≤ Weight average molecular weight ( Mw ) ( Valence of the trivalent or higher aliphatic alcohol ) × ( Amount of the trivalent or higher aliphatic alcohol ) ≤ 4 , 000 ; Expression ( 1 ) 4,000<weight average molecular weight (Mw)<25,000 Expression (2); and 0.5≦(amount of the trivalent or higher aliphatic alcohol)≦6.5 Expression (3), where, in the Expressions (1) and (3), the amount of the trivalent or higher aliphatic alcohol denotes a percent by mole of the trivalent or higher aliphatic alcohol relative to the alcohol component. 2. The polyester resin according to claim 1 , wherein the polyester resin satisfies Expression (1-1) below: 800 ≤ Weight average molecular weight ( Mw ) ( Valence of the trivalent or higher aliphatic alcohol ) × ( Amount of the trivalent or higher aliphatic alcohol ) ≤ 2 , 000 Expression
Assignees
Inventors
Classifications
- G03G9/08795Primary
characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants · CPC title
using a solid developer, e.g. powder developer · CPC title
- G03G9/08755Primary
Polyesters · CPC title
- C08G63/12Primary
derived from polycarboxylic acids and polyhydroxy compounds · CPC title
characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature · CPC title
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- What does patent US9785074B2 cover?
- A polyester resin for a toner, the polyester resin including: a segment derived from an alcohol component; and a segment derived from a carboxylic acid component, wherein the alcohol component includes a trivalent or higher aliphatic alcohol, and wherein the polyester resin satisfies Expressions (1) to (3) below: 500 ≤ Weight average…
- Who is the assignee on this patent?
- Nagata kohsuke, Nakayama Shinya, Sugimoto Tsuyoshi, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification G03G9/08795. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Oct 10 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).