US4647643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft non-blocking polyurethanes
Assignee: Becton Dickinson and Co
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Filing: 1985-11-08
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Granted: 1987-03-03
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Expires: 2005-11-08
Abstract
Abstract Soft, non-blocking, thermoplastic polyurethanes are prepared by reacting a long chain polyester or polyether diol, a short chain diol, a diisocyanate and a silicone diol of the formula: <IMAGE> wherein x has a value of about 1 to 30, y has a value of about 1 to 200, R is an alkylene group having 2 to 4 carbon atoms, R1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, or a phenylalkyl group, and V and W are divalent linking groups. A unique feature of the invention is that the polymers exhibit, less blocking, are less susceptible to hydrolysis and are highly transparent. These polyurethanes are particularly useful in fabricating medical tubing.
Inventors
- 👤 Richard J. Zdrahala
- 👤 David Spielvogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3893; C08G18/40; C08G18/61; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
100 words
A soft, non-blocking, thermoplastic polyurethane, said polyurethane containing within the polymer chain thereof units of a siloxane-polyoxyalkylene block copolymer of the formula (I) ##STR7## wherein x has a value of about 1 to 30; y has a value of about 1 to 200, R is an alkylene group having 2 to 4 carbon atoms; R 1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, and a phenylalkyl group; and V and W are divalent linking groups.
Claim 2
Dependent Claim
100 words
A soft, non-blocking, thermoplastic polyurethane, said polyurethane containing within the polymer chain thereof units of a siloxane-polyoxyalkylene block copolymer of the formula (I) ##STR7## wherein x has a value of about 1 to 30; y has a value of about 1 to 200, R is an alkylene group having 2 to 4 carbon atoms; R 1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, and a phenylalkyl group; and V and W are divalent linking groups.
Claim 3
Dependent Claim
37 words
The polyurethane of claim 1 wherein said block copolymer units have the formula (II) ##STR8## wherein x, y, R and R 1 are defined as in claim 1 and z is an integer of 2 or more.
Claim 4
Dependent Claim
18 words
The polyurethane of claim 2 wherein said polyurethane has a Shore A hardness of about 55 to 90.
Claim 5
Dependent Claim
20 words
The polyurethane of claim 3 wherein said polyurethane contains about 1 to 15% by weight of said block copolymer units.
Claim 6
Dependent Claim
55 words
The polyurethane of claim 4 wherein said polyurethane is the reaction product of a diisocyanate, a long chain polyether or polyester diol, a short chain diol having 2 to 6 carbon atoms, and a silicone diol of the formula (IV) ##STR9## where x, y, z, R, and R 1 are defined as in claim 1.
Claim 7
Dependent Claim
24 words
The polyurethane of claim 5 wherein said diisocyanate and said short chain diol make up about 25 to 45 weight percent of said polyurethane.
Claim 8
Dependent Claim
19 words
The polyurethane of claim 6 wherein said long chain diol has a molecular weight of about 1000 to 3000.
Claim 9
Dependent Claim
18 words
The polyurethane of claim 7 wherein said silicone diol has a molecular weight of about 1200 to 6000.
Claim 10
Dependent Claim
12 words
The polyurethane of claim 8 wherein R 1 is an alkyl group.
Claim 11
Dependent Claim
13 words
The polyurethane of claim 9 wherein R represents an ethylene or butylene group.
Claim 12
Dependent Claim
14 words
The polyurethane of claim 10 wherein said long chain diol is a polyether diol.
Claim 13
Dependent Claim
14 words
The polyurethane of claim 10 wherein said long chain diol is a polyester diol.
Claim 14
Dependent Claim
15 words
The polyurethane of claim 11 wherein said diisocyanate is an alicyclic or an aromatic diisocyanate.
Claim 15
Dependent Claim
14 words
The polyurethane of claim 12 wherein said diisocyanate is an alicyclic or aromatic diisocyanate.
Claim 16
Dependent Claim
18 words
The polyurethane of claim 3 wherein said polyurethane has a Shore A hardness of about 60 to 80.
Claim 17
Dependent Claim
23 words
The polyurethane of claim 6 wherein said diisocyanate and short chain diol make up about 27 to 36 weight percent of said polyurethane.
Claim 18
Dependent Claim
161 words
A soft, non-blocking, thermoplastic polyurethane, said polyurethane having a Shore A hardness of about 55 to 90 and being the reaction product of an aromatic or alicyclic diisocyanate, a short chain diol having 2 to 6 carbon atoms, a long chain polyether or polyester diol and a silicone diol of the formula (IV) ##STR10## where x has a value of about 1 to 30, y has a value of about 10 to 30, z is 2 to 4, R represents an ethylene or butylene group, and R 1 represents an alkyl group, said silicone diol constituting about 5 to 10 weight percent of said polyurethane, said diisocyanate and said short chain diol constituting about 27 to 36 weight percent of said polyurethane, said silicone diol having a molecular weight in the range of about 1200 to 6000, and said long chain diol constituting the balance of said polyurethane and having a molecular weight in the range of about 1000 to 3000.
Claim 19
Dependent Claim
161 words
A soft, non-blocking, thermoplastic polyurethane, said polyurethane having a Shore A hardness of about 55 to 90 and being the reaction product of an aromatic or alicyclic diisocyanate, a short chain diol having 2 to 6 carbon atoms, a long chain polyether or polyester diol and a silicone diol of the formula (IV) ##STR10## where x has a value of about 1 to 30, y has a value of about 10 to 30, z is 2 to 4, R represents an ethylene or butylene group, and R 1 represents an alkyl group, said silicone diol constituting about 5 to 10 weight percent of said polyurethane, said diisocyanate and said short chain diol constituting about 27 to 36 weight percent of said polyurethane, said silicone diol having a molecular weight in the range of about 1200 to 6000, and said long chain diol constituting the balance of said polyurethane and having a molecular weight in the range of about 1000 to 3000.
Claim 20
Dependent Claim
143 words
A process for making a soft, non-blocking, thermoplastic polyurethane which comprises: (a) forming a diol mixture including a short chain diol, a long chain polyether or polyester diol, and a silicone diol of the formula (IV) ##STR11## where x has a value of about 1 to 30, y has a value of about 1 to 200, z is an integer of 2 or more, R is an alkylene group having 2 to 4 carbon atoms, and R 1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, and a phenylalkyl group, (b) adding a diisocyanate to said diol mixture, (c) stirring said mixture to prevent separation thereof while said mixture reacts and forms a polyurethane, and (d) recovering said polyurethane.
Claim 21
Dependent Claim
143 words
A process for making a soft, non-blocking, thermoplastic polyurethane which comprises: (a) forming a diol mixture including a short chain diol, a long chain polyether or polyester diol, and a silicone diol of the formula (IV) ##STR11## where x has a value of about 1 to 30, y has a value of about 1 to 200, z is an integer of 2 or more, R is an alkylene group having 2 to 4 carbon atoms, and R 1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, and a phenylalkyl group, (b) adding a diisocyanate to said diol mixture, (c) stirring said mixture to prevent separation thereof while said mixture reacts and forms a polyurethane, and (d) recovering said polyurethane.
Claim 22
Dependent Claim
14 words
The process of claim 18 wherein said diisocyanate is an aromatic or alicyclic diisocyanate.
Claim 23
Dependent Claim
43 words
The process of claim 19 wherein said silicone diol is reacted in an amount of about 1 to 15 weight percent and said diisocyanate and said short chain diol are reacted in a combined amount of about 25 to about 45 weight percent.
Claim 24
Dependent Claim
135 words
A process for making a soft, non-blocking, thermoplastic polyurethane which comprises: (a) reacting a diisocyanate with a silicone diol of the formula (IV) to form an isocyanate terminated diol, ##STR12## where x has a value of about 1 to 30, y has a value of about 1 to 200, z is an integer of 2 or more, R is an alkylene group having 2 to 4 carbon atoms, and R 1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, and a phenyalkyl group, (b) reacting said isocyanate terminated diol with a mixture of a long chain diol and a short chain diol to form a polyurethane, and (c) recovering said polyurethane.
Claim 25
Dependent Claim
135 words
A process for making a soft, non-blocking, thermoplastic polyurethane which comprises: (a) reacting a diisocyanate with a silicone diol of the formula (IV) to form an isocyanate terminated diol, ##STR12## where x has a value of about 1 to 30, y has a value of about 1 to 200, z is an integer of 2 or more, R is an alkylene group having 2 to 4 carbon atoms, and R 1 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a haloalkyl group having 1 to 18 carbon atoms, a phenyl group, a substituted phenyl group, and a phenyalkyl group, (b) reacting said isocyanate terminated diol with a mixture of a long chain diol and a short chain diol to form a polyurethane, and (c) recovering said polyurethane.
Claim 26
Dependent Claim
10 words
A medical device formed from the polyurethane of claim 3.
Claim 27
Dependent Claim
12 words
The medical device of claim 22 wherein said device is a tubing.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |