US4440815A — Clear, autoclavable plastic formulation for medic…

Claim 1

Independent Claim 97 words

A clear, flexible, thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45% to about 70% by weight of a polyolefin consisting essentially of polypropylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10% to about 40% by weight of a thermoplastic elastomer composition consisting essentially of an ethylene butylene block copolymer having terminal polystyrene units, and (d) from 0 to about 15% of a high boiling point petroleum distillation byproduct.

Claim 2

Dependent Claim 97 words

A clear, flexible, thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45% to about 70% by weight of a polyolefin consisting essentially of polypropylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10% to about 40% by weight of a thermoplastic elastomer composition consisting essentially of an ethylene butylene block copolymer having terminal polystyrene units, and (d) from 0 to about 15% of a high boiling point petroleum distillation byproduct.

Claim 3

Dependent Claim 86 words

A clear, flexible plastic material capable of being blow molded and autoclaved comprising: (a) from about 45 to about 70% by weight of a polyolefin consisting essentially of propylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of a polymer selected from the group consisting of ethylene methyl acrylate, (c) from abut 10 to 40% by weight of a thermoplastic elastomer consisting essentially of block copolymers of styrene, ethylene and butylene, and (d) from 10 to about 15% mineral oil.

Claim 4

Dependent Claim 86 words

A clear, flexible plastic material capable of being blow molded and autoclaved comprising: (a) from about 45 to about 70% by weight of a polyolefin consisting essentially of propylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of a polymer selected from the group consisting of ethylene methyl acrylate, (c) from abut 10 to 40% by weight of a thermoplastic elastomer consisting essentially of block copolymers of styrene, ethylene and butylene, and (d) from 10 to about 15% mineral oil.

Claim 5

Dependent Claim 46 words

The plastic formulation as disclosed in claim 1 wherein said ethylene-butylene block copolymer has a central block comprising 50 to 85% by weight of the copolymer molecule of a rubbery olefin polymer of generally equal proportions of ethylene and butylene units; and terminal blocks of polystyrene.

Claim 6

Dependent Claim 29 words

The plastic formulation as disclosed in claim 1 wherein said block copolymer has at least two monoalkenylarene polymer blocks and at least one substantially completely hydrogenated diene polymer block.

Claim 7

Dependent Claim 61 words

The plastic formulation as disclosed in claim 1 wherein said polyolefin (a) and said polymer (b) are mechanically combined in a mixture of approximately 70-90% by weight polyolefin and 10-30% by weight polymer, said mixture then being mechanically combined with said thermoplastic composition in a ratio of approximately 70% by weight polyolefin/polymer mixture to approximately 30% by weight thermoplastic elastomer composition.

Claim 8

Dependent Claim 19 words

The plastic composition as disclosed in claim 4 wherein said block copolymer has the structure polystyrene hydrogenated polybutadiene polystyrene.

Claim 9

Dependent Claim 19 words

A clear, flexible, collapsible container being blow molded and subsequently made from the plastic material disclosed in claim 1.

Claim 10

Dependent Claim 22 words

A clear, flexible, collapsible medical liquid container being blow molded and subsequently autoclaved, made from the plastic material disclosed in claim 1.

Claim 11

Dependent Claim 156 words

A clear, flexible thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45-70% by weight of a polyolefin consisting essentially of polypropylene, mixed with (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10 to 40% by weight of a thermoplastic elastomers composition selected from the group consisting of: a block copolymer having at least two polymer blocks A and at least one polymer block B, each polymer block A being selected from the group consisting of monoalkenylarene polymers and hydrogenated products thereof wherein no more than 25% of the arene double bonds have been reduced and polymer block B is a hydrogenated polymer block of a C 4-5 conjugated diene polymer wherein at least about 30% of the aliphatic unsaturation has been reduced by hydrogenation, and (d) from about 0 to about 15% mineral oil.

Claim 12

Dependent Claim 156 words

A clear, flexible thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45-70% by weight of a polyolefin consisting essentially of polypropylene, mixed with (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10 to 40% by weight of a thermoplastic elastomers composition selected from the group consisting of: a block copolymer having at least two polymer blocks A and at least one polymer block B, each polymer block A being selected from the group consisting of monoalkenylarene polymers and hydrogenated products thereof wherein no more than 25% of the arene double bonds have been reduced and polymer block B is a hydrogenated polymer block of a C 4-5 conjugated diene polymer wherein at least about 30% of the aliphatic unsaturation has been reduced by hydrogenation, and (d) from about 0 to about 15% mineral oil.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-04-03	1987-10-03	1988-04-03	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-04-03	1991-10-03	1992-04-03	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-04-03	1995-10-03	1996-04-03	$7700.00	Window Closed / Lapsed

Clear, autoclavable plastic formulation for medical liquid containers

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