The present invention relates to an elastic article comprising at least one hydrogenated block polymer and, optionally, at least one other polymer selected from the group consisting of a reactive tailored liquid polyurethane, an elastomeric or sulfonated ethylene/vinyl aromatic interpolymer, an elastomeric ethylene/C3 C20 .alpha.-olefin interpolymer, a C3-C20 .alpha.-olefin/conjugated diene interpolymer, an elastic polypropylene polymer, an enhanced polypropylene polymer, an elastomeric thermoplastic polyurethane, an elastic copolyester, a partially hydrogenated block polymer, an elastic polyamide, a hydroxyl functionalized polyether (or polyetheramine), a styrene/conjugated diene interpolymer, and an elastomeric metallocene-catalyzed synthetic polymer or a blend or formulated system thereof. In particular, the invention pertains to elastic shaped articles such as, for example, but not limited to, elastic fibers, elastic fabric, and elastic film as well as composites comprising the same, especially a composite absorbent item comprising at least one elastic shaped article. Inventive composite items include, but are not limited to, feminine hygiene napkins, incontinence pads, disposable diapers, and training pants. The term "elastic article" is used in reference to shaped items, while the term "elastic material" is used in reference to the novel compositions of the invention.

Hydrogenated block copolymers having elasticity and articles made therefrom

Flexible hydrogenated block copolymers can be successfully used in a variety of applications including films, profiles, sheets, coatings, injection molded articles, blow or rotational molded articles and pultruded articles.

Compositions comprising hydrogenated block copolymers and end-use applications thereof

The present invention is directed to a hydrogenated block copolymer of a vinyl aromatic and butadiene which is useful in the preparation of optical media discs having very low birefringence.

Hydrogenated block copolymers and optical media discs produced therefrom

The present invention is directed to a composition comprising a hydrogenated block copolymer of a vinyl aromatic and conjugated diene polymer, having a lamellar morphology and high aromatic hydrogenation level.

Hydrogenated block copolymer compositions

Process for producing a hydrogenated α-olefin-dicyclopentadiene copolymer. The process includes a step of distilling of unreacted dicyclopentadiene or tetrahydrodicyclopentadiene which is a hydrogenated product of unreacted dicyclopentadiene from a mixture containing α-olefin-dicyclopentadiene copolymer or its hydrogenated product in the presence of a high-boiling hydrocarbon solvent having a boiling point of 195 to 300° C. and an ignition point of 260° C. or more. Method for melt molding the hydrogenated α-olefin-dicyclopentadiene copolymer is also proposed.

Process for producing hydrogenated α-olefin-dicyclopentadiene copolymer, method for molding the same and optical material

A hydrogenated vinyl aromatic hydrocarbon polymer comprising:
 (a) 5 to 90% by weight of a vinyl aromatic hydrogenated polymer (A) obtainable by hydrogenating a hydrocarbon-conjugated diene block copolymer in such an amount that substantially all the double bonds derived from the conjugated diene bonds and from 60 mol% to 80 mol% of the double bonds in the aromatic rings have been hydrogenated, the content of the conjugated diene polymer units in the block copolymer being from 1 to 50 wt%; and (b) 10 to 95% by weight of a hydrogenated polymer (B) obtainable by hydrogenating a vinyl aromatic hydrocarbon polymer in such an amount that from 60 mol% to 80 mol% of the double bonds in the aromatic rings have been hydrogenated.

Satoshi Kato

Papers

Hydrogenated vinyl aromatic hydrocarbon polymer composition and optical disc substrate