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Low pressure process for frothing polyurethane or polyisocyanurate
US9738767B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9738767-B2 |
| Application number | US-201414770239-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 25, 2014 |
| Priority date | Mar 15, 2013 |
| Publication date | Aug 22, 2017 |
| Grant date | Aug 22, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A process of making a polyurethane or polyisocyanurate foam comprises the step of mixing under low pressure: (A) An isocyanate; (B) A compound reactive with the isocyanate, e.g., a polyol; (C) A liquid blowing agent; and (D) Carbon dioxide.
First claim
Opening claim text (preview).
We claim: 1. A process of making a polyurethane or polyisocyanurate foam, the process comprising the step of mixing under a low pressure of from 0.7 to 2.1 MPa: (A) an isocyanate; (B) a compound reactive with the isocyanate; (C) a liquid blowing agent; and (D) gaseous carbon dioxide, wherein components (A), (B), (C) and (D) are mixed within a low pressure impingement mixer, and components (A), (B), (C) and (D) are mixed without a static mixer. 2. The process of claim 1 in which the compound reactive with the isocyanate is a polyol. 3. The process of claim 1 in which the liquid blowing agent is a hydrocarbon blowing agent. 4. The process of claim 1 in which the gaseous carbon dioxide is first mixed with each of components (A) and (B) before components (A) and (B) are mixed with one another. 5. The process of claim 1 in which all of components (A), (B), (C) and (D) are mixed with one another simultaneously. 6. The process of claim 1 in which the weight ratio of gaseous carbon dioxide to the liquid blowing agent is from 60:40 to 40:60. 7. The process of claim 6 in which the liquid blowing agent is a hydrocarbon blowing agent.
Assignees
Inventors
Classifications
Organic compounds only containing carbon, hydrogen and oxygen atoms, e.g. ketone or alcohol · CPC title
Foaming under special conditions, e.g. in sub-atmospheric pressure, in or on a liquid · CPC title
having carbocyclic groups · CPC title
Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48 · CPC title
CO2, N2 or noble gases · CPC title
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Frequently asked questions
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- What does patent US9738767B2 cover?
- A process of making a polyurethane or polyisocyanurate foam comprises the step of mixing under low pressure: (A) An isocyanate; (B) A compound reactive with the isocyanate, e.g., a polyol; (C) A liquid blowing agent; and (D) Carbon dioxide.
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C08J9/127. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 22 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).