Polyisocyanate cured product, and method for producing polyisocyanate cured product
US-2017044296-A1 · Feb 16, 2017 · US
Polyisocyanurate plastics having high thermal stability
US10597484B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10597484-B2 |
| Application number | US-201615568127-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 21, 2016 |
| Priority date | Apr 21, 2015 |
| Publication date | Mar 24, 2020 |
| Grant date | Mar 24, 2020 |
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- Title
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- Abstract
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Abstract
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The present invention relates to a polyisocyanurate plastic obtainable by catalytic trimenzation of a polyisocyanate composition A) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates, where the isocyanurate structure content in the polyisocyanate composition A) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition A). The present invention further relates to a transparent element comprising or consisting of the polyisocyanurate plastic. The invention likewise relates to a process for producing the polyisocyanurate plastics.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing polyisocyanurate plastics, comprising the following steps: a) providing a polyisocyanate composition A) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates, where the isocyanurate structure content in the polyisocyanate composition A) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and oxadiazinetrione structure that are present in the polyisocyanate composition A); b) catalytically trimerizing the polyisocyanate composition A). 2. The process according to claim 1 , wherein the oligomeric polyisocyanates consist of one or more oligomeric polyisocyanates formed from 1,4-diisocyanatobutane, 1,5-diisocyanatopentane, 1,6-diisocyanatohexane, isophorone diisocyanate or 4,4′-diisocyanatodicyclohexylmethane or mixtures thereof or the polyisocyanate composition A) consists of at least 80% by weight, based on the weight of the polyisocyanate composition A), of polyisocyanates having exclusively aliphatically or cycloaliphatically bonded isocyanate groups and/or catalytic trimerization is accomplished using sodium salts or potassium salts of aliphatic carboxylic acids having 2 to 20 carbon atoms in combination with complexing agents.
Assignees
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Classifications
Lenses · CPC title
oligomerisation to isocyanurate groups · CPC title
aliphatic · CPC title
acyclic · CPC title
containing biuret groups · CPC title
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- What does patent US10597484B2 cover?
- The present invention relates to a polyisocyanurate plastic obtainable by catalytic trimenzation of a polyisocyanate composition A) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates, where the isocyanurate structure content in the polyisocyanate composition A) is at least 50 mol %, based on the sum total of the oligomeric structures from the group consisting of ure…
- Who is the assignee on this patent?
- Covestro Deutschland Ag
- What technology area does this patent fall under?
- Primary CPC classification C08G18/792. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 24 2020 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).