Preparation method for low-color number, low-odor polyisocyanate curing agent
US-2025353959-A1 · Nov 20, 2025 · US
Process for the preparation of polyisocyanates and use thereof
US9458097B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9458097-B2 |
| Application number | US-201414509202-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 8, 2014 |
| Priority date | Aug 3, 2010 |
| Publication date | Oct 4, 2016 |
| Grant date | Oct 4, 2016 |
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Abstract
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The invention relates to a process for isocyanate modification which includes reacting a) at least one organic isocyanate having an NCO functionality greater than or equal to 1, b) a catalyst comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation, c) optionally a solvent, and d) optionally additives. The present invention also relates to a catalyst for isocyanate modification comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process which comprises reacting a) at least one organic isocyanate having an NCO functionality greater than or equal to 1, b) a catalyst comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation, c) optionally a solvent, and d) optionally additives, wherein the phosphonium salt comprises a cation corresponding to the formula I:…
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- C07C263/16Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9458097B2 cover?
- The invention relates to a process for isocyanate modification which includes reacting a) at least one organic isocyanate having an NCO functionality greater than or equal to 1, b) a catalyst comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation, c) optionally a solvent, and d) optionally additives. The presen…
- Who is the assignee on this patent?
- Bayer Materialscience Ag, Covestro Deutschland Ag
- What technology area does this patent fall under?
- Primary CPC classification C07C263/16. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 04 2016 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).