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US-2017298232-A1 · Oct 19, 2017 · US
Process for producing a cationic dyeable polyester and the cationic dyeable polyester produced thereby
US10913820B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10913820-B2 |
| Application number | US-201916249490-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 16, 2019 |
| Priority date | Jul 30, 2018 |
| Publication date | Feb 9, 2021 |
| Grant date | Feb 9, 2021 |
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Abstract
Official abstract text for this publication.
A process for producing a cationic dyeable polyester includes the steps of: (a) subjecting a combination of a bis-hydroxy alkyl terephthalate monomer of Formula (1) defined herein and an organic diacid monomer mixture which includes an aromatic dicarboxylic acid monomer and a sulfo group-containing aromatic dicarboxylic acid dyeable monomer to an esterification reaction to form an esterification reaction product; and (b) subjecting the esterification reaction product to a polycondensation reaction.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for producing a cationic dyeable polyester, comprising the steps of: (a) subjecting a combination of a bis-hydroxy alkyl terephthalate monomer of Formula (1) and an organic diacid monomer mixture, which includes an aromatic dicarboxylic acid monomer and a sulfo group-containing aromatic dicarboxylic acid dyeable monomer, to an esterification reaction to form an esterification reaction product, wherein each R 1 independently represents hydrogen, phenyl, a C 1 -C 6 linear alkyl group, or a C 3 -C 6 branched alkyl group; and (b) subjecting the esterification reaction product to a polycondensation reaction. 2. The process according to claim 1 , wherein each R 1 represents hydrogen. 3. The process according to claim 1 , wherein the sulfo group-containing aromatic dicarboxylic acid dyeable monomer is selected from the group consisting of 2-sulfoterephthalic acid monosodium salt, 5-sulfoisophthalic acid monosodium salt, and a combination thereof. 4. The process according to claim 1 , wherein a molar ratio of the bis-hydroxy alkyl terephthalate monomer to the aromatic dicarboxylic acid monomer is in a range from 1.5:1 to 150:1. 5. The process according to claim 1 , wherein a molar ratio of the bis-hydroxy alkyl terephthalate monomer to the sulfo group-containing aromatic dicarboxylic acid dyeable monomer is in a range from 1.3:1 to 100:1. 6. The process according to claim 1 , wherein the aromatic dicarboxylic acid monomer is selected from the group consisting of terephthalic acid, isophthalic acid, phthalic acid, diphenic acid, 2,6-naphthalic acid, 1,5-naphthalic acid, and combinations thereof. 7. The process according to claim 1 , wherein in step (a), the esterification reaction is implemented at a normal pressure. 8. The process according to claim 1 , wherein in step (b), the polycondensation reaction is implemented in the presence of a transition metal-containing polycondensation catalyst. 9. A cationic dyeable polyester produced by the process according to claim 1 . 10. The cationic dyeable polyester according to claim 9 , having an average aggregate radius of up to 2.3 nm.
Assignees
Inventors
Classifications
Antimony or compounds thereof · CPC title
- C08G63/6886Primary
Dicarboxylic acids and dihydroxy compounds · CPC title
- D06P3/521Primary
using acid dyes · CPC title
from copolyesters · CPC title
Polyesters · CPC title
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Frequently asked questions
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- What does patent US10913820B2 cover?
- A process for producing a cationic dyeable polyester includes the steps of: (a) subjecting a combination of a bis-hydroxy alkyl terephthalate monomer of Formula (1) defined herein and an organic diacid monomer mixture which includes an aromatic dicarboxylic acid monomer and a sulfo group-containing aromatic dicarboxylic acid dyeable monomer to an esterification reaction to form an este…
- Who is the assignee on this patent?
- Far Eastern New Century Corp
- What technology area does this patent fall under?
- Primary CPC classification C08G63/6886. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 09 2021 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).