Method for producing hydrogenated conjugated diene polymer
US-2015368387-A1 · Dec 24, 2015 · US
Thermosetting composition containing styrene-butadiene-styrene block polymer, and method for curing same
US2023051549A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023051549-A1 |
| Application number | US-202117759021-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 22, 2021 |
| Priority date | Jan 29, 2020 |
| Publication date | Feb 16, 2023 |
| Grant date | — |
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Abstract
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The present application provides a method for producing a cured product that includes: (I) heating a thermosetting composition containing a styrene-butadiene-styrene block copolymer (SBS) (A) and a thermal radical generator (B) within a temperature range of 120° C. to 180° C. until 30% or more of double bonds derived from 1,2-bond structure in a butadiene block react; and (II) then heating the thermosetting composition within a temperature range of 181° C. to 300° C. until 50% or more of the double bonds derived from 1,2-bond structure in a butadiene block react.
First claim
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1 . A method for producing a cured product, comprising: (I) heating a thermosetting composition containing a styrene-butadiene-styrene block copolymer (SBS) (A) and a thermal radical generator (B) within a temperature range of 120° C. to 180° C. until 30% or more of double bonds derived from 1,2-bond structure in a butadiene block react; and (II) then heating the thermosetting composition within a temperature range of 181° C. to 300° C. until 50% or more of the double bonds derived from 1,2-bond structure in a butadiene block react. 2 . The method for producing a cured product according to claim 1 , wherein a molar ratio of 1,2-bond structure and 1,4-bond structure in the butadiene block in the styrene-butadiene-styrene block copolymer (SBS) (A) is 80:20 to 100:0. 3 . The method for producing the cured product according to claim 1 , wherein the thermosetting composition comprises 0.1 to 10 parts by weight of the thermal radical generator (B) with respect to 100 parts by weight of the styrene-butadiene-styrene block copolymer (SBS) (A). 4 . The method for producing the cured product according to claim 1 , wherein a weight ratio of a styrene block and the butadiene block in the styrene-butadiene-styrene block copolymer (SBS) (A) is 10:90 to 90:10. 5 . The method for producing the cured product according to claim 1 , wherein a number-average molecular weight (Mn) of the styrene-butadiene-styrene block copolymer (SBS) (A) is 2,000 to 100,000. 6 . The method for producing the cured product according to claim 1 , wherein a molecular weight distribution (Mw/Mn) of the styrene-butadiene-styrene block copolymer (SBS) (A) is 1.00 to 3.00. 7 . A thermosetting composition comprising: a styrene-butadiene- styrene block copolymer (SBS) (A) in which a molar ratio of 1,2-bond structure and 1,4-bond structure in a butadiene block is 80:20 to 100:0; and a thermal radical generator (B).
Assignees
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Classifications
Peroxides · CPC title
- C08F297/04Primary
polymerising vinyl aromatic monomers and conjugated dienes · CPC title
of vinyl aromatic monomers and conjugated dienes · CPC title
Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title
Chemical modification by after-treatment (graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C) · CPC title
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- What does patent US2023051549A1 cover?
- The present application provides a method for producing a cured product that includes: (I) heating a thermosetting composition containing a styrene-butadiene-styrene block copolymer (SBS) (A) and a thermal radical generator (B) within a temperature range of 120° C. to 180° C. until 30% or more of double bonds derived from 1,2-bond structure in a butadiene block react; and (II) then heating the …
- Who is the assignee on this patent?
- Nippon Soda Co
- What technology area does this patent fall under?
- Primary CPC classification C08F297/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Feb 16 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).