US4613640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent thermoplastic elastomeric compositions and articles produced therefrom
Assignee: Consolidated Polymer Technologies Inc
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Filing: 1985-11-13
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Granted: 1986-09-23
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Expires: 2005-11-13
Abstract
Abstract Compositions, including hydrocarbon elastomeric block copolymers, such as styrene-ethylene-butylene-styrene and styrene-butadiene-styrene with mineral oil and essentially linear (i.e. non-cross-linked) polysiloxanes are made transparent by using polysiloxanes which are miscible with mineral oil. A preferred polysiloxane is polymethyloctyl siloxane. Transparent films, bags, tubes and other articles, especially useful in medical applications, such as catheters, blood tubes and blood bags, can be processed from the compositions.
Inventors
- 👤 Richard J. Deisler
- 👤 Eugene P. Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
A thermoplastic composition which exhibits improved optical clarity comprising a substantially uniform mixture of (A) an elastomeric thermoplastic hydrocarbon block copolymer in an amount of at least about 30% of the total weight of the composition; (B) mineral oil in an amount of from about 5 to about 60% by weight of the composition; and (C) a polysiloxane which is miscible with mineral oil and which has a viscosity within the range of from about 20 to about 1,000,000 centistokes at room temperature in an amount of from about 0.1 to 12%, by weight, of the composition.
Claim 2
Dependent Claim
97 words
A thermoplastic composition which exhibits improved optical clarity comprising a substantially uniform mixture of (A) an elastomeric thermoplastic hydrocarbon block copolymer in an amount of at least about 30% of the total weight of the composition; (B) mineral oil in an amount of from about 5 to about 60% by weight of the composition; and (C) a polysiloxane which is miscible with mineral oil and which has a viscosity within the range of from about 20 to about 1,000,000 centistokes at room temperature in an amount of from about 0.1 to 12%, by weight, of the composition.
Claim 3
Dependent Claim
114 words
The composition of claim 1 wherein the polysiloxane has the formula ##STR17## where R 1 is C 1 -C 4 alkyl or ##STR18## R 2 is --CH 2 --, R 3 is C 1 -C 10 alkyl, C 2 -C 10 alkenyl, aryl (C 1 -C 10 ) alkyl, or ##STR19## R 4 is H, C 1 -C 4 alkyl or C 2 -C 4 alkenyl, R 5 is H, C 1 -C 4 alkyl or C 2 -C 4 alkenyl, x is 2 or more, provided that when R 3 is said alkyl or alkenyl group, x is 3 or more, and n is a number of from about 10 to about 20,000.
Claim 4
Dependent Claim
64 words
The composition of claim 2 wherein R 1 is methyl or phenyl, R 2 is --CH 2 --, R 3 is C 1 -C 8 alkyl and x is from 3 to 25, or R 3 is ##STR20## where R 5 is as defined above, and x is from 2 to 5, and n is a number of from about 10 to about 20,000.
Claim 5
Dependent Claim
45 words
The composition of claim 1 wherein the polysiloxane is selected from the group consisting of polymethyl octyl siloxane, polyphenyl-4,4-bisethyl hexyl siloxane, polymethyltetradecyl siloxane, polymethyl hexyl siloxane, a copolymer of methyloctyl siloxane and methylhydride siloxane, polymethyl octyldecyl siloxane, polyphenylethyl methyl siloxane, and polymethyl styryl hexyl siloxane.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein the block copolymer comprises styrene-butadiene-styrene.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the block copolymer comprises styrene-ethylene-butylene-styrene.
Claim 8
Dependent Claim
9 words
The composition of claim 1 which further comprises polypropylene.
Claim 9
Dependent Claim
20 words
The composition of claim 7 wherein the polypropylene comprises from about 2 to 20 percent by weight of the composition.
Claim 10
Dependent Claim
11 words
A transparent article obtained by processing the composition of claim 1.
Claim 11
Dependent Claim
12 words
The transparent article of claim 9 in the form of a tube.
Claim 12
Dependent Claim
12 words
The transparent article of claim 9 in the form of a film.
Claim 13
Dependent Claim
13 words
The transparent article of claim 9 in the form of a flexible container.
Claim 14
Dependent Claim
11 words
The transparent article of claim 9 wherein the processing is extrusion.
Claim 15
Dependent Claim
11 words
The transparent article of claim 9 wherein the processing is molding.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |