Items of clothing having shape memory
US-9222203-B2 · Dec 29, 2015 · US
Biomass-resource-derived polyurethane, method for producing same, and biomass-resource-derived polyester polyol
US9290614B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9290614-B2 |
| Application number | US-201313871414-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 26, 2013 |
| Priority date | Mar 31, 2010 |
| Publication date | Mar 22, 2016 |
| Grant date | Mar 22, 2016 |
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- Title
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Abstract
Official abstract text for this publication.
The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic acid is more than 0 ppm and not more than 1,000 ppm relative to the dicarboxylic acid, and a pKa value of the organic acid at 25° C. is not more than 3.7.
First claim
Opening claim text (preview).
The invention claimed is: 1. A biomass-resource-derived polyester polyol, comprising, in reacted form: an organic acid comprising three or more active hydrogen groups per molecule and having a pKa value at 25° C. of not more than 3.7; a dicarboxylic acid unit; and an aliphatic diol unit, wherein the dicarboxylic acid unit comprises a dicarboxylic acid other than the organic acid, and wherein at least a portion of the dicarboxylic acid is derived from biomass resources, wherein a content of the organic acid is more than 0% by mole to not more than 0.09% by mol relative to the dicarboxylic acid unit, and wherein the biomass-resource-derived polyester polyol has a number average molecular weight of 500 or more and not more than 4,000. 2. The biomass-resource-derived polyester polyol of claim 1 , wherein the dicarboxylic acid derived from biomass resources is succinic acid. 3. The biomass-resource-derived polyester polyol of claim 1 , wherein the organic acid is malic acid, tartaric acid, citric acid, or any combination thereof. 4. The biomass-resource-derived polyester polyol of claim 1 , having a number average molecular weight of 500 or more and not more than 3,000. 5. The biomass-resource-derived polyester polyol of claim 1 , wherein the dicarboxylic acid comprises a second dicarboxylic acid other than the organic acid, and the second dicarboxylic acid is petroleum-derived.
Assignees
Inventors
Classifications
from polyesters · CPC title
Soles · CPC title
- C08G18/4238Primary
derived from dicarboxylic acids and dialcohols · CPC title
Dicarboxylic acids and dihydroxy compounds · CPC title
containing only one alkylene bisphenyl group · CPC title
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- What does patent US9290614B2 cover?
- The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic a…
- Who is the assignee on this patent?
- Ohara Teruhiko, Suzuki Naoki, Nakajima Yasuko, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification C08G18/4238. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 22 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).