US3935132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic urethane polymer filled with cross-linked urethane polymer
Assignee: Lyondell Chemical Technology LP
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Filing: 1974-04-15
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Granted: 1976-01-27
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Expires: 1994-04-15
Abstract
Abstract Thermoplastic urethane polymer is filled with cross-linked urethane polymer. The presence of the filler has little or no adverse effect on the properties of the thermoplastic urethane polymer.
Inventors
- 👤 Richard M. Gerkin
- 👤 Rene Roberts
- 👤 Joy C. Hodges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
A mixture, capable of being processed by thermoplastic polymer techniques, said mixture comprising an intimate blend of a previously produced thermoplastic urethane polymer and a comminuted crosslinked urethane polymer, said cross-linked urethane polymer being derived from a flexible urethane foam, a semi-rigid urethane foam, a rigid urethane foam, or a non-foamed urethane elastomeric polymer.
Claim 2
Dependent Claim
54 words
A mixture, capable of being processed by thermoplastic polymer techniques, said mixture comprising an intimate blend of a previously produced thermoplastic urethane polymer and a comminuted crosslinked urethane polymer, said cross-linked urethane polymer being derived from a flexible urethane foam, a semi-rigid urethane foam, a rigid urethane foam, or a non-foamed urethane elastomeric polymer.
Claim 3
Dependent Claim
13 words
The mixture of claim 1 wherein said mixture is an apparently homogeneous blend.
Claim 4
Dependent Claim
57 words
The mixture of claim 1 wherein said thermoplastic urethane polymer comprises the reaction product of (a) an aromatic diisocyanate, (b) a polyoxyalkylene glycol wherein the individual oxyalkylene units have from 2 to 4 carbon atoms, a poly(epsilon-caprolactone) diol, or a hydroxylterminated polyester of a dicarboxylic acid and a dihydric alcohol, and (c) a low molecular weight diol.
Claim 5
Dependent Claim
12 words
The mixture of claim 3 wherein said aromatic diisocyanate is bis(4-isocyanatophenyl) methane.
Claim 6
Dependent Claim
40 words
The mixture of claim 1 wherein said cross-linked urethane polymer comprises the reaction product of (a) an organic polyisocyanate, and (b) a polyhydric alcohol, at least one of said reactants (a) and (b) having an average functionality greater than two.
Claim 7
Dependent Claim
26 words
The mixture of claim 5 wherein said organic polyisocyanate is tolylene diisocyanate, bis(4-isocyanatophenyl)methane, or a polymethylene polyphenyl isocyanate produced by phosgenation of an aniline/formaldehyde reaction product.
Claim 8
Dependent Claim
40 words
The mixture of claim 3 wherein said cross-linked urethane polymer comprises the reaction product of (i) an organic polyisocyanate, and (ii) a polyhydric alcohol, at least one of said reactants (i) and (ii) having an average functionality greater than two.
Claim 9
Dependent Claim
28 words
The mixture of claim 7 wherein said organic polyisocyanate is tolylene diisocyanate, bis(4-isocyanatophenyl)methane, or a polymethylene polyphenyl isocyanate that comprises the phosgenated product of an aniline/formaldehyde condensation product.
Claim 10
Dependent Claim
20 words
The mixture of claim 1 wherein said cross-linked urethane polymer is derived from a non-foamed elastomer or a flexible foam.
Claim 11
Dependent Claim
20 words
The mixture of claim 3 wherein said cross-linked urethane polymer is derived from a non-foamed elastomer or a flexible foam.
Claim 12
Dependent Claim
20 words
The mixture of claim 5 wherein said crosslinked urethane polymer is derived from a non-foamed elastomer or a flexible foam.
Claim 13
Dependent Claim
20 words
The mixture of claim 7 wherein said cross-linked urethane polymer is derived from a non-foamed elastomer or a flexible foam.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |