US4129611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyurethanes of mixtures of hard and soft thermoplast polymers
Assignee: Bayer Corp
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Filing: 1974-12-09
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Granted: 1978-12-12
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Expires: 1994-12-09
Abstract
Abstract Thermoplastic poluyrethane polymers having improved physical properties over a wide temperature range are produced from a physical mixture of thermoplastic polymers of (a) from about 10 to about 90 percent of a soft polymer prepared from an organic isocyanate having an average functionality of about 2 and an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight greater than 200 at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.1/1, and (b) from about 90 to 10 percent of a hard polymer prepared by reacting at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.2/1 an organic icocyanate having an average functionality of from about 1.90 to about 2.20 with an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight less than 100.
Inventors
- 👤 Herbert L. Heiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:55
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
153 words
A physical thermoplastic mixture of polyurethane polymers which comprises (A) from about 10% to about 90% by weight of a soft thermoplastic polymer prepared by reacting at an NCO to active hydrogen atom ratio of from about 0.9/1 to about 1.1/1 (1) an organic isocyanate having an average functionality of about 2 with (2) an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight greater than 200 and (B) from about 90 to about 10% by weight of a hard thermoplastic polymer prepared by reacting at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.2/1 (1) an organic diisocyanate having an average functionality of from about 1.90 to about 2.20 with (2) an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight less than 100.
Claim 2
Dependent Claim
153 words
A physical thermoplastic mixture of polyurethane polymers which comprises (A) from about 10% to about 90% by weight of a soft thermoplastic polymer prepared by reacting at an NCO to active hydrogen atom ratio of from about 0.9/1 to about 1.1/1 (1) an organic isocyanate having an average functionality of about 2 with (2) an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight greater than 200 and (B) from about 90 to about 10% by weight of a hard thermoplastic polymer prepared by reacting at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.2/1 (1) an organic diisocyanate having an average functionality of from about 1.90 to about 2.20 with (2) an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight less than 100.
Claim 3
Dependent Claim
15 words
The physical mixture of claim 1 wherein the organic isocyanate (A) (1) is a diisocyanate.
Claim 4
Dependent Claim
27 words
The physical mixture of claim 1 wherein the organic isocyanate (A) is a mixture of isocyanates having an average functionality of from about 1.95 to about 2.05.
Claim 5
Dependent Claim
15 words
The physical mixture of claim 1 wherein the organic isocyanate (B) (1) is a diisocyanate.
Claim 6
Dependent Claim
28 words
The physical mixture of claim 1 wherein the organic isocyanate (B) (1) is a mixture of isocyanates having an average functionality of from about 1.90 to about 2.20.
Claim 7
Dependent Claim
23 words
The physical mixture of claim 1 wherein the compound (B) (2) is a single difunctional compound having an equivalent weight less than 100.
Claim 8
Dependent Claim
14 words
The physical mixture of claim 6 wherein the compound (B) (2) is a glycol.
Claim 9
Dependent Claim
26 words
The physical mixture of claim 1 wherein all of the reactants used in the preparation of both the soft polymer and the hard polymer are difunctional.
Claim 10
Dependent Claim
26 words
The physical mixture of claim 1 wherein the hard polymer (B) is prepared at an NCO to active hydrogen atom ratio of from 1/1 to 1.2/1.
Claim 11
Dependent Claim
18 words
The physical mixture of claim 1 wherein the isocyanates (A) (1) and (B) (1) are both monomeric diisocyanates.
Claim 12
Dependent Claim
21 words
The physical mixture of claim 10 wherein the monomeric isocyanates (A) (1) and (B) (1) are 4,4'-diphenylmethane diisocyanate or 1,6-hexane diisocyanate.
Claim 13
Dependent Claim
16 words
The physical mixture of claim 10 wherein the isocyanates (A) (1) and (B) (1) are different.
Claim 14
Dependent Claim
31 words
The physical mixture of claim 1 wherein the soft polymer A has a Shore D hardness less than 35 and the final mixture has a Shore D hardness greater than 50.
References Cited (Backward Citations)
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US3240842A
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US3284539A
Cited
US3542903A
Cited
US3509232A
Cited
US3663513A
Cited
US3711571A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |