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US4343339A
Expired / Lapsed
US
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Process for the production of tires comprising vulcanized elastomers containing urethane groups
Assignee: Bayer AG
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Filing: 1980-09-22
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Granted: 1982-08-10
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Expires: 2000-09-22
Abstract
Abstract The instant invention is directed to a process for the production of vulcanized elastomers containing urethane groups by casting, comprising: (A) mixing the following components: (1) liquid diene polymers containing isocyanate reactive functional groups, (2) compounds having molecular weights of from 400 to 10,000, and containing at least two hydroxyl groups, (3) polyisocyanates, (4) cross-linking agents having molecular weights of from 32 to 400 and containing at least two active hydrogen atoms, (5) vulcanization agents used for vulcanization and optionally (6) reinforcing fillers; and subsequently (B) pouring the mixture into a mold and allowing the mixture to react in the mold; and subsequently (C) vulcanizing the molded product at temperatures above 120° C.
Inventors
- 👤 Jurgen Schwindt
- 👤 Otto Ganster
- 👤 Hans-Joachim Meiners
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/87; C08G18/28; C08G18/67; C08G18/69; C08G2380/00; Y; Y10; Y10S; Y10S152/00; Y10S152/905; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
144 words
A process for the production of vulcanized elastomers containing urethane groups by casting, comprising: (A) mixing the following components: (1) liquid diene polymers containing isocyanate reactive functional groups, having an average functionality of 2 to 3 and an average molecular weight of from 500 to 30,000, (2) compounds having molecular weights of from 400 to 10,000, and containing at least two hydroxyl groups, (3) polyisocyanates, (4) 3 to 30% by weight, based on 100 parts by weight of components (1)+(2), cross-linking agents having molecular weights of from 32 to 400 and containing at least two active hydrogen atoms, (5) vulcanization agents used for vulcanization and optionally (6) reinforcing fillers; and subsequently (B) pouring the mixture into a mold and allowing the mixture to react in the mold; and subsequently removing the molded product and (C) vulcanizing outside the mold at temperatures above 120° C.
Claim 2
Dependent Claim
144 words
A process for the production of vulcanized elastomers containing urethane groups by casting, comprising: (A) mixing the following components: (1) liquid diene polymers containing isocyanate reactive functional groups, having an average functionality of 2 to 3 and an average molecular weight of from 500 to 30,000, (2) compounds having molecular weights of from 400 to 10,000, and containing at least two hydroxyl groups, (3) polyisocyanates, (4) 3 to 30% by weight, based on 100 parts by weight of components (1)+(2), cross-linking agents having molecular weights of from 32 to 400 and containing at least two active hydrogen atoms, (5) vulcanization agents used for vulcanization and optionally (6) reinforcing fillers; and subsequently (B) pouring the mixture into a mold and allowing the mixture to react in the mold; and subsequently removing the molded product and (C) vulcanizing outside the mold at temperatures above 120° C.
Claim 3
Dependent Claim
37 words
The process of claim 1, wherein the mixture contains 20 to 80 parts by weight of component (1) and 80 to 20 parts by weight of component (2), based on the sum of components (1) and (2).
Claim 4
Dependent Claim
37 words
The process of claim 2, wherein the mixture contains 20 to 60 parts by weight of component (1) and 80 to 40 parts by weight of component (2), based on the sum of components (1) and (2).
Claim 5
Dependent Claim
28 words
The process of claim 1, wherein component (4) is used in quantities of from 5 to 20% by weight, based on 100 parts by weight of components (1)+(2).
Claim 6
Dependent Claim
20 words
The process of claim 1, wherein said liquid diene polymer has an average molecular weight of from 1,000 to 10,000.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein the functional group of said liquid diene polymer is a carboxyl, amino, thiol and/or hydroxyl group or a halogen atom.
Claim 8
Dependent Claim
19 words
The process of claim 1, wherein said diene polymers are polybutadienols or copolymers of styrene and/or acrylonitrile with butadiene.
Claim 9
Dependent Claim
24 words
The process of claim 1, wherein component (2) has a molecular weight of from 1,000 to 8,000 and contain 2 to 8 hydroxyl groups.
Claim 10
Dependent Claim
35 words
The process of claim 1, wherein said polyisocyanates are used in the form of isocyanate group-containing prepolymers with said compounds having molecular weights of from 400 to 10,000 which contain at least two hydroxyl groups.
Claim 11
Dependent Claim
13 words
The process of claim 1, wherein said cross-linking agents are diamines or polyamines.
Claim 12
Dependent Claim
12 words
The process of claim 10 wherein said cross-linking agents are aromatic diamines.
Claim 13
Dependent Claim
23 words
The process of claim 1 wherein said reinforcing fillers are carbon black, silica and glass and wherein plasticizers and extender oils are added.
Claim 14
Dependent Claim
120 words
Tires and tire components such as tread surface strips and/or side parts as well as retreaded tires, comprising vulcanized elastomers containing urethane groups prepared by casting, comprising: (A) mixing the following components: (1) liquid diene polymers containing isocyanate reactive functional groups, (2) compounds having molecular weights of from 400 to 10,000, and containing at least two hydroxyl groups, (3) polyisocyanates, (4) cross-linking agents having molecular weights of from 32 to 400 and containing at least two active hydrogen atoms, (5) vulcanization agents used for vulcanization and optionally (6) reinforcing fillers; and subsequently (B) pouring the mixture into a mold and allowing the mixture to react in the mold; and subsequently (C) vulcanizing the molded product at temperatures above 120° C.
Claim 15
Dependent Claim
120 words
Tires and tire components such as tread surface strips and/or side parts as well as retreaded tires, comprising vulcanized elastomers containing urethane groups prepared by casting, comprising: (A) mixing the following components: (1) liquid diene polymers containing isocyanate reactive functional groups, (2) compounds having molecular weights of from 400 to 10,000, and containing at least two hydroxyl groups, (3) polyisocyanates, (4) cross-linking agents having molecular weights of from 32 to 400 and containing at least two active hydrogen atoms, (5) vulcanization agents used for vulcanization and optionally (6) reinforcing fillers; and subsequently (B) pouring the mixture into a mold and allowing the mixture to react in the mold; and subsequently (C) vulcanizing the molded product at temperatures above 120° C.
References Cited (Backward Citations)
US3427366A
Cited
GB1145338A
Cited
US3714110A
Cited
US3457234A
Cited
US3607976A
Cited
US3701374A
Cited
US3855177A
Cited
US3897400A
Cited
US4104265A
Cited
DE2510703A1
Cited
US4053446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |