Resist material, resist composition and method for forming resist pattern
US-2017145142-A1 · May 25, 2017 · US
Phenol resin for wet friction material, phenol resin composition, and wet friction material
US2020271177A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020271177-A1 |
| Application number | US-202016801387-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 26, 2020 |
| Priority date | Feb 27, 2019 |
| Publication date | Aug 27, 2020 |
| Grant date | — |
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 phenol resin for a wet friction material of the invention contains a resol-type phenol resin having, in one molecule, a structural unit A which is derived from a phenol compound having one phenolic hydroxyl group and a structural unit B which is derived from a polyfunctional phenol compound having two phenolic hydroxyl groups.
First claim
Opening claim text (preview).
What is claimed is: 1 . A phenol resin for a wet friction material, comprising: a resol-type phenol resin having, in one molecule, a structural unit A which is derived from a phenol compound having one phenolic hydroxyl group represented by the following General Formula (A) and a structural unit B which is derived from a polyfunctional phenol compound having two phenolic hydroxyl groups represented by the following General Formula (B), (in General Formula (A), R 1 each independently represents a substituent other than a hydroxyl group, a represents an integer of 0 to 3, and m represents an integer equal to or greater than 1 and equal to or smaller than 10), (in General Formula (B), R 2 each independently represents a substituent other than a hydroxyl group, b represents an integer of 0 to 2, and n represents an integer equal to or greater than 1 and equal to or smaller than 10). 2 . The phenol resin for a wet friction material according to claim 1 , wherein the polyfunctional phenol compound having two phenolic hydroxyl groups contains one or more kinds of compounds selected from the group consisting of resorcinol, catechol, and hydroquinone. 3 . The phenol resin for a wet friction material according to claim 1 , wherein a weight-average molecular weight Mw of the phenol resin for a wet friction material is equal to or greater than 100 and equal to or smaller than 10,000. 4 . A phenol resin composition comprising: the phenol resin for a wet friction material according to claim 1 ; and an organic solvent. 5 . A wet friction material obtained by impregnating a substrate with the phenol resin composition according to claim 4 . 6 . The wet friction material according to claim 5 , wherein a proportion of the structural unit B contained in a cured substance of the phenol resin composition is equal to or higher than 10% by weight and equal to or lower than 90% by weight with respect to a total of 100% by weight of the structural unit A and the structural unit B.
Assignees
Inventors
Classifications
- C08G8/24Primary
with mixtures of two or more phenols which are not covered by only one of the groups C08G8/10 - C08G8/20 · CPC title
of aldehydes with phenols · CPC title
Compositions based on an organic binder · CPC title
with phenol · CPC title
Resorcinol · 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 US2020271177A1 cover?
- A phenol resin for a wet friction material of the invention contains a resol-type phenol resin having, in one molecule, a structural unit A which is derived from a phenol compound having one phenolic hydroxyl group and a structural unit B which is derived from a polyfunctional phenol compound having two phenolic hydroxyl groups.
- Who is the assignee on this patent?
- Nsk-Warner Kk, Sumitomo Bakelite Co
- What technology area does this patent fall under?
- Primary CPC classification C08G8/24. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Aug 27 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).