Resin composition, molded body, and production method
US-2016215143-A1 · Jul 28, 2016 · US
Lignin resin composition, cured product, and molded product
US10059793B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10059793-B2 |
| Application number | US-201515524349-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 18, 2015 |
| Priority date | Nov 20, 2014 |
| Publication date | Aug 28, 2018 |
| Grant date | Aug 28, 2018 |
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- Title
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Abstract
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Provided is a lignin resin composition including a lignin derivative having a weight-average molecular weight of 500 or more and 4000 or less and a novolac-type phenolic resin having a weight-average molecular weight of 1000 or more and 3000 or less, in which the content of the lignin derivative is not higher than the content of the novolac-type phenolic resin. In particular, the cured product (molded product) of a lignin resin composition obtained by melt-mixing such a lignin resin composition, adding hexamethylenetetramine thereto and then heating the resulting mixture has a high bending strength. Such a lignin resin composition is utilizable as a thermosetting resin substituting a phenolic resin.
First claim
Opening claim text (preview).
The invention claimed is: 1. A lignin resin composition comprising: a lignin derivative having a weight-average molecular weight of 500 or more and 4000 or less; and a phenolic novolac resin having a weight-average molecular weight of 1000 or more and 3000 or less, wherein the content of the lignin derivative is not higher than the content of the phenolic novolac resin. 2. The lignin resin composition according to claim 1 , wherein the weight ratio of the lignin derivative to the phenolic novolac resin is 5:95 to 50:50. 3. The lignin resin composition according to claim 1 , wherein the lignin derivative is solvent-soluble. 4. The lignin resin composition according to claim 1 , wherein the solvent is a polar solvent. 5. The lignin resin composition according to claim 1 , wherein the softening temperature of the phenolic novolac resin is 60° C. or higher and 95° C. or lower. 6. The lignin resin composition according to claim 1 , which is formed by melt-mixing the lignin derivative and the phenolic novolac resin at a temperature of 60° C. or higher and 250° C. or lower in advance. 7. A cured product obtained by adding hexamethylenetetramine to the lignin resin composition according to claim 1 , followed by curing. 8. A molded product having the cured product according to claim 7 .
Assignees
Inventors
Classifications
- C08G8/24Primary
with mixtures of two or more phenols which are not covered by only one of the groups C08G8/10 - C08G8/20 · CPC title
Low-molecular-weight derivatives of lignin (high-molecular-weight derivatives of lignin {C08H6/00}) · CPC title
Lignin · CPC title
Compositions of lignin-containing materials (of polysaccharides C08L1/00 - C08L5/00) · CPC title
- C09D197/005Primary
Lignin · CPC title
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- What does patent US10059793B2 cover?
- Provided is a lignin resin composition including a lignin derivative having a weight-average molecular weight of 500 or more and 4000 or less and a novolac-type phenolic resin having a weight-average molecular weight of 1000 or more and 3000 or less, in which the content of the lignin derivative is not higher than the content of the novolac-type phenolic resin. In particular, the cured product …
- Who is the assignee on this patent?
- Sumitomo Bakelite Co
- What technology area does this patent fall under?
- Primary CPC classification C08G8/24. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 28 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).