Method for producing a mixture of alkoxylated polyphenols and use of said mixture
US-2024409679-A1 · Dec 12, 2024 · US
Polyurethane composites produced by a vacuum infusion process
US9580598B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9580598-B2 |
| Application number | US-201113071810-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2011 |
| Priority date | Mar 25, 2011 |
| Publication date | Feb 28, 2017 |
| Grant date | Feb 28, 2017 |
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Abstract
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A polyurethane-forming system having a viscosity at 25° C. of less than 600 mPas for at least 30 minutes, a gel time at ambient temperature of greater than 60 minutes and a water content of less than 0.06% by weight, based on total system weight, is used to produce composites by a vacuum infusion process. This system makes it possible to produce large composites such as wind turbine blades having excellent physical properties.
First claim
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What is claimed is: 1. A process for producing a fiber-reinforced polyurethane composite article by vacuum infusion molding, comprising: (a) degassing components comprising an isocyanate component and an isocyanate-reactive component, wherein: (1) the isocyanate component has a viscosity at 25° C. of from about 20 to about 300 mPas and comprises a diisocyanate or a polyisocyanate, and (2) the isocyanate-reactive component comprises: (i) one or more polyols having a viscosity a…
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Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Operations & Transport · mapped topic
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- What does patent US9580598B2 cover?
- A polyurethane-forming system having a viscosity at 25° C. of less than 600 mPas for at least 30 minutes, a gel time at ambient temperature of greater than 60 minutes and a water content of less than 0.06% by weight, based on total system weight, is used to produce composites by a vacuum infusion process. This system makes it possible to produce large composites such as wind turbine blades havi…
- Who is the assignee on this patent?
- Younes Usama E, Covestro Llc
- What technology area does this patent fall under?
- Primary CPC classification C08L75/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 28 2017 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).