US4124573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft polyurethane elastomer containing isocyanurate ring
Assignee: Bridgestone Corp
•
Filing: 1977-01-31
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Granted: 1978-11-07
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Expires: 1997-01-31
Abstract
Abstract A soft polyurethane elastomer containing isocyanurate ring prepared by reacting polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000, and a functionality of about 2-5, and polyisocyanate compound in the presence of tertiary amine catalyst, and if desired further combined with organic tin catalyst. This process is advantageous in facilitation of material control during curing reaction, low exothermicity and high thermal stability of the resulting polymer. Further the properties of the polymer are improved by using ethyleneoxide addition polyoxypropylene polyol instead of the above polymer and a specific tertiary amine as a catalyst. The elastomer thus prepared is significantly suitable for tire filling material.
Inventors
- 👤 Yoji Watabe
- 👤 Michio Ishii
- 👤 Hiroshi Kaneda
- 👤 Fumitaka Ino
- 👤 Masao Kuwano
- 👤 Yasuyuki Ura
- 👤 Shiro Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/08; C08G18/09; C08G18/092; C08G18/16; C08G18/18; C08G18/4841; C08G2350/00; C08G2380/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
95 words
A process for preparing a noncellular soft polyurethane elastomer containing isocyanurate rings, which comprises mixing (a) polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000 and a functionality of 2-5; (b) a polyisocyanate compound, the equivalent ratio (NCO/OH) of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polyol being from about 0.95-3.3; and (c) from about 0.01 to 2.0 parts by weight per 100 parts by weight of the sum of the polyol and polyisocyanate compounds of a tertiary amine catalyst which is N,N-dimethylbenzylamine or N,N-dimethylcyclohexylamine, and curing the mixture.
Claim 2
Dependent Claim
95 words
A process for preparing a noncellular soft polyurethane elastomer containing isocyanurate rings, which comprises mixing (a) polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000 and a functionality of 2-5; (b) a polyisocyanate compound, the equivalent ratio (NCO/OH) of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polyol being from about 0.95-3.3; and (c) from about 0.01 to 2.0 parts by weight per 100 parts by weight of the sum of the polyol and polyisocyanate compounds of a tertiary amine catalyst which is N,N-dimethylbenzylamine or N,N-dimethylcyclohexylamine, and curing the mixture.
Claim 3
Dependent Claim
13 words
The process claimed in claim 1, wherein the polyoxypropylene polyol contains ethyleneoxide addition-polymerized.
Claim 4
Dependent Claim
21 words
The process claimed in claim 2, wherein the content of ethylene oxide in the polyol is about 5-30 percent by weight.
Claim 5
Dependent Claim
19 words
The process claimed in claim 1, wherein the OH equivalent molecular weight of the polyol ranges from about 800-2,500.
Claim 6
Dependent Claim
19 words
The process claimed in claim 4, wherein the OH equivalent molecular weight of the polyol ranges from about 800-2,000.
Claim 7
Dependent Claim
15 words
The process claimed in claim 1, wherein the functionality of the polyol ranges from 3-4.
Claim 8
Dependent Claim
39 words
The process claimed in claim 1, wherein the polyol is polyoxypropylene polyol containing ethylene oxide at the terminals thereof in the content of 5-30%, and having the OH equivalent molecular weight of about 2,000-3,000 and the functionality of 3-4.
Claim 9
Dependent Claim
12 words
The process claimed in claim 1, wherein the polyisocyanate compound is tolylenediisocyanate.
Claim 10
Dependent Claim
13 words
The process claimed in claim 1, wherein the ratio of NCO/OH is 1.0-2.0.
Claim 11
Dependent Claim
36 words
The process claimed in claim 1, wherein the tertiary amine catalyst is added in the amount of about 0.1-1.0 weight parts per 100 weight parts of the total amount of the polyol and the isocyanate compound.
Claim 12
Dependent Claim
17 words
The process claimed in claim 1, wherein the curing step is carried out by one shot method.
Claim 13
Dependent Claim
16 words
The process claimed in claim 11, wherein the tertiary amine catalyst is premixed with the polyol.
Claim 14
Dependent Claim
16 words
The process claimed in claim 1, wherein the curing step is carried out by prepolymer method.
Claim 15
Dependent Claim
13 words
The process claimed in claim 1, wherein the tertiary amine catalyst is N,N-dimethylbenzylamine.
Claim 16
Dependent Claim
13 words
The process claimed in claim 1, wherein the tertiary amine catalyst is N,N-dimethylcyclohexylamine.
Claim 17
Dependent Claim
17 words
A soft polyurethane elastomer having isocyanurate rings, produced in accordance with the process claimed in claim 1.
Claim 18
Dependent Claim
14 words
A tire filling material produced in accordance with the process claimed in claim 1.
Claim 19
Dependent Claim
119 words
A process for preparing noncellular soft polyurethane elastomer having isocyanurate rings, which comprises mixing (a) polyoxyropylene polyol having an OH equivalent molecular weight of about 500-3,000 and a functionally of 2-5; (b) a polyisocyanate compound, the equivalent ratio (NCO/OH) of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polyol being from about 0.95-3.3; (c) from about 0.01 to 2.0 parts by weight per 100 parts by weight of the sum of the polyol and polyisocyanate compounds of a tertiary amine catalyst which is N,N-dimethylbenzylamine or N,N-dimethylcyclohexylamine; and (d) less than about 0.5 weight parts of an organic tin catalyst per 100 weight parts of the total amount of polyol and polyisocyanate compound; and curing the mixture.
Claim 20
Dependent Claim
119 words
A process for preparing noncellular soft polyurethane elastomer having isocyanurate rings, which comprises mixing (a) polyoxyropylene polyol having an OH equivalent molecular weight of about 500-3,000 and a functionally of 2-5; (b) a polyisocyanate compound, the equivalent ratio (NCO/OH) of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polyol being from about 0.95-3.3; (c) from about 0.01 to 2.0 parts by weight per 100 parts by weight of the sum of the polyol and polyisocyanate compounds of a tertiary amine catalyst which is N,N-dimethylbenzylamine or N,N-dimethylcyclohexylamine; and (d) less than about 0.5 weight parts of an organic tin catalyst per 100 weight parts of the total amount of polyol and polyisocyanate compound; and curing the mixture.
Claim 21
Dependent Claim
95 words
A process for the preparation of a noncellular tire filling material, which process comprises mixing (a) polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000 and a functionality of 2-5; (b) a polyisocyanate compound, the equivalent ratio (NCO/OH) of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polyol being from about 0.95-2.0; and (c) from about 0.01 to 2.0 parts by weight per 100 parts by weight of the sum of the polyol and polyisocyanate compound of a tertiary amine catalyst which is 2,4,6-tris(dimethylaminomethyl)phenol, N,N-dimethylbenzylamine, N,N-dimethylcyclohexylamine; and curing the mixture.
Claim 22
Dependent Claim
95 words
A process for the preparation of a noncellular tire filling material, which process comprises mixing (a) polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000 and a functionality of 2-5; (b) a polyisocyanate compound, the equivalent ratio (NCO/OH) of isocyanate groups in the polyisocyanate compound to hydroxyl groups in the polyol being from about 0.95-2.0; and (c) from about 0.01 to 2.0 parts by weight per 100 parts by weight of the sum of the polyol and polyisocyanate compound of a tertiary amine catalyst which is 2,4,6-tris(dimethylaminomethyl)phenol, N,N-dimethylbenzylamine, N,N-dimethylcyclohexylamine; and curing the mixture.
Claim 23
Dependent Claim
11 words
A process according to claim 19 wherein the catalyst is 2,4,6-tris(dimethylaminomethyl)phenol.
Claim 24
Dependent Claim
11 words
A process according to claim 19 wherein the catalyst is N,N-dimethylbenzylamine.
Claim 25
Dependent Claim
11 words
A process according to claim 19 wherein the catalyst is N,N-dimethylcyclohexylamine.
Claim 26
Dependent Claim
13 words
A non-cellular tire filling material obtained according to the process of claim 19.
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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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |