Elastomer composition and medical container stopper formed by molding same
AssigneeMCPP Innovation LLC
InventorKanae Karube
Life of this patent
Estimating the term…
Abstract
The elastomer composition of the present invention comprises a thermoplastic elastomer composition which contains 20 to 80% by weight of component (A), 1 to 25% by weight of component (B), and 1 to 70% by weight of component (C): Component (A): at least one block copolymer selected from: a block copolymer having a polymer block derived from a vinyl aromatic compound and a polymer block derived from at least one selected from a conjugated diene and isobutylene; and a block copolymer obtained by hydrogenating the block copolymer; Component (B): a polypropylene resin containing component (B1): a modified polypropylene obtained by graft-modifying a polypropylene resin with a diene compound; and Component (C): a hydrocarbon softener for rubber.
Claims15
A medical member, comprising an elastomer composition comprising a thermoplastic elastomer composition comprising 20 to 80% by weight of component (A), 1 to 25% by weight of component (B), and 1 to 70% by weight of component (C) with respect to a total amount of the following component (A), component (B), and component (C):
- Component (A):
- at least one block copolymer selected from:
- a block copolymer having a polymer block derived from a vinyl aromatic compound and a polymer block derived from at least one selected from a conjugated diene and isobutylene;
- and a block copolymer obtained by hydrogenating the block copolymer;
- Component (B):
- a polypropylene resin containing component (B1) below
- Component (B1):
- a modified polypropylene obtained by graft-modifying a polypropylene resin with a diene compound;
- and
- Component (C):
- a hydrocarbon softener for rubber,
- wherein the elastomer composition has durometer hardness A (ISO 7619-1) of 10 to 40.
A medical container stopper, comprising an elastomer composition comprising a thermoplastic elastomer composition comprising 20 to 80% by weight of component (A), 1 to 25% by weight of component (B), and 1 to 70% by weight of component (C) with respect to a total amount of the following component (A), component (B), and component (C):
- Component (A):
- at least one block copolymer selected from:
- a block copolymer having a polymer block derived from a vinyl aromatic compound and a polymer block derived from at least one selected from a conjugated diene and isobutylene;
- and a block copolymer obtained by hydrogenating the block copolymer;
- Component (B):
- a polypropylene resin containing component (B1) below
- Component (B1):
- a modified polypropylene obtained by graft-modifying a polypropylene resin with a diene compound;
- and
- Component (C):
- a hydrocarbon softener for rubber.
Dependencies are inferred from the claim text.