US4342847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of thermoplastic synthetic materials
Assignee: Bayer AG
•
Filing: 1979-12-13
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Granted: 1982-08-03
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Expires: 1999-12-13
Abstract
Abstract The instant invention is directed to a continuous process for the production of thermoplastic materials, comprising: I. introducing 4 to 65 parts by weight of thermoplastic polymer into an extruder at a first inlet, wherein the temperature within said extruder is such that said thermoplastic polymer melts; II. adding to said thermoplastic polymer through a second inlet 35 to 96 parts by weight of the following polyurethane forming components, such that the total parts by weight of thermoplastic polymer and polyurethane components is 100: (A) organic polyisocyanate; and (B) chain lengthening agent with a molecular weight below 400 containing a hydroxyl group and/or amine group; wherein the ratio of isocyanate groups of component (A) to Zerewitinoff active groups of component (B) is in the range of from 0.90:1 to 1.2:1; and III. discharging from the extruder the product of the process when the reaction of said polyurethane components (A) and (B) is substantially complete.
Inventors
- 👤 Wilhelm Goyert
- 👤 Ernst Meisert
- 👤 Wolfgang Grimm
- 👤 Alfred Eitel
- 👤 Hans Wagner
- 👤 Georg Niederdellmann
- 👤 Bernd Quiring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0895; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A continuous process for the production of thermoplastic materials, comprising: I. introducing 4 to 65 parts by weight of thermoplastic polymer into an extruder at a first inlet, wherein the temperature within said extruder is such that said thermoplastic polymer melts; II. adding to said thermoplastic polymer through a second inlet 35 to 96 parts by weight of the following polyurethane forming components, such that the total parts by weight of thermoplastic polymer and polyurethane components is 100; (A) organic polyisocyanate; and (B) chain lengthening agent with a molecular weight below 400 containing a hydroxyl group and/or amine group; wherein the ratio of isocyanate groups of component (A) to Zerewitinoff active groups of component (B) is in the range of about 0.90:1 to 1.2:1; and III. discharging from the extruder the product of the process when the reaction of said polyurethane components (A) and (B) is substantially complete.
Claim 2
Dependent Claim
148 words
A continuous process for the production of thermoplastic materials, comprising: I. introducing 4 to 65 parts by weight of thermoplastic polymer into an extruder at a first inlet, wherein the temperature within said extruder is such that said thermoplastic polymer melts; II. adding to said thermoplastic polymer through a second inlet 35 to 96 parts by weight of the following polyurethane forming components, such that the total parts by weight of thermoplastic polymer and polyurethane components is 100; (A) organic polyisocyanate; and (B) chain lengthening agent with a molecular weight below 400 containing a hydroxyl group and/or amine group; wherein the ratio of isocyanate groups of component (A) to Zerewitinoff active groups of component (B) is in the range of about 0.90:1 to 1.2:1; and III. discharging from the extruder the product of the process when the reaction of said polyurethane components (A) and (B) is substantially complete.
Claim 3
Dependent Claim
22 words
The process of claim 1, wherein said polyurethane components further comprise substantially linear polyol having a molecular weight from 400 to 10,000.
Claim 4
Dependent Claim
18 words
The process of claim 1, wherein said thermoplastic polymer is 4 to 30 parts by weight ABS polymer.
Claim 5
Dependent Claim
17 words
The process of claim 1, wherein said thermoplastic polymer is 25 to 60 parts by weight polycarbonate.
Claim 6
Dependent Claim
18 words
The process of claim 1, wherein said thermoplastic polymer is 20 to 65 parts by weight thermoplastic polyurethane.
Claim 7
Dependent Claim
15 words
The process of claim 1, wherein said polyurethane forming components are added through several inlets.
Claim 8
Dependent Claim
31 words
The process of claim 1, wherein the reaction mixture is in said extruder for 0.3 to 30 minutes and the temperature within said extruder is from about 60° to 300° C.
Claim 9
Dependent Claim
29 words
The process of claim 1, wherein said proportion of isocyanate groups of component (A) to Zerewitinoff active groups of component (B) are in the range of 0.95:1 to 1.1:1.
Claim 10
Dependent Claim
15 words
The process of claim 1, wherein said extruder is a self-cleaning double shaft screw extruder.
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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) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |