Hydrogenated diene block copolymer and composition comprising the same
US5191024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1990 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | May 18, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/94
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hydrogenated diene block copolymer having a polystyrene-reduced number-average molecular weight of 50,000-600,000 which is a hydrogenation product of an (A)--(B) block copolymer in which (A) means an alkenyl aromatic compound polymer block and (B) means a conjugated diene homopolymer block wherein the vinyl content of the conjugated diene portion is more than 60%, or an alkenyl aromatic compound-conjugated diene random copolymer block wherein the vinyl content of the conjugated diene portion is 15% or more, an (A)--(B)--(C) block copolymer in which (A) and (B) are as defined above and (C) means an alkenyl aromatic compound-conjugated diene copolymer tapered block wherein the proportion of the alkenyl aromatic compound increases gradually, or an (A)--(B)--(A) block copolymer in which (A) and (B) are as defined above, in which block copolymer PA0 (1) the weight proportion of theh alkenyl aromatic compound/the conjugated diene is 5/95 to 60/40, and PA0 (2) the content of the bound alkenyl aromatic compound in at least one block (A) is at last 3% by weight and the total of the bound alkenyl aromatic compound contents in the block (A) and the block (C) or the two block (A)'s is 3-50% …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.