Foaming thermoplastic polyurethane resin, producing method thereof, and molded article
US-2019211136-A1 · Jul 11, 2019 · US
Modification method of polyurethane, polyurethane, polishing pad, and modification method of polishing pad
US12576474B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12576474-B2 |
| Application number | US-202418753038-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2024 |
| Priority date | May 11, 2018 |
| Publication date | Mar 17, 2026 |
| Grant date | Mar 17, 2026 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A polishing pad comprising, in at least a polishing surface thereof, a polyurethane having an ethylenically unsaturated bond, wherein a compound having a conjugated double bond and a functional group selected from the group consisting of a carboxyl group, a metal salt of a carboxyl group, a hydroxyl group, an amino group, a sulfonic acid group, a phosphoric acid group and an imidazole group is added to the ethylenically unsaturated bond to obtain a Diels Alder ring substituted with the functional group. 2 . The polishing pad according to claim 1 , wherein the polyurethane comprises a polymer constituent unit derived from a compound having an ethylenically unsaturated bond. 3 . The polishing pad according to claim 1 , wherein the polyurethane comprises a polymer constituent unit derived from at least one compound selected from the group consisting of cis-2-butene-1,4-diol, 4,5-bis(hydroxymethyl) imidazole, 5-norbornene-2,3-dimethanol, cis-2-nonene-1-ol, cis-3-nonene-1-ol, cis-3-octene-1-ol, and polybutadiene diol. 4 . The polishing pad according to claim 1 , wherein the functional group is a carboxyl group. 5 . The polishing pad according to claim 4 , wherein the polishing surface has a zeta potential at a pH of 3.0 of −1.0 mV or less. 6 . A polishing pad comprising, in at least a polishing surface thereof, a polyurethane having an ethylenically unsaturated bond, wherein the polyurethane comprises a polymer constituent unit derived from at least one compound selected from the group consisting of cis-2-butene-1,4-diol, 4,5-bis(hydroxymethyl) imidazole, 5-norbornene-2,3-dimethanol, cis-2-nonene-1-ol, cis-3-nonene-1-ol, and cis-3-octene-1-ol.
Assignees
Inventors
Classifications
of semiconductor materials · CPC title
Chemically modified polymers · CPC title
containing carboxylic acid groups · CPC title
Grinding, lapping or polishing of wafers, substrates or parts of devices · CPC title
- B24B37/24Primary
characterised by the composition or properties of the pad materials · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12576474B2 cover?
- A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liq…
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification B24B37/24. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 17 2026 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).