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US4029593A
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US
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Mixed polyols
Assignee: Bayer AG
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Filing: 1974-08-12
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Granted: 1977-06-14
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Expires: 1994-08-12
Abstract
Abstract Mixtures of polyols which normally separate into phases are stabilizeed against such separation by including in the mixture a stabilizing amount, preferably from about 0.05% to about 5% based on the weight of polyols in the mixture of an inert surface-active inorganic material having a specific surface of about 10 to about 800 m 2 /g.
Inventors
- 👤 Dietmar Schapel
- 👤 Ulrich VON Gizycki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:42
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/02; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511; C08G18/67; C08K; C08K3/00; C08K3/01; C08K3/013; C08K3/02; C08K3/04; C08K3/18; C08K3/24; C08K3/34; C08K3/36; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08G2130/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A polyol mixture containing: a. at least two polyols which are normally incompatible with each other, and b. about 0.05 to about 5 percent by weight, based on component (a), of an inert surface-active inorganic material having a specific surface area of 10 to 800 m 2 /g, which inorganic material is selected from the group consisting of activated charcoal, asbestos, a surface-active silicic acid and a zeolite.
Claim 2
Dependent Claim
68 words
A polyol mixture containing: a. at least two polyols which are normally incompatible with each other, and b. about 0.05 to about 5 percent by weight, based on component (a), of an inert surface-active inorganic material having a specific surface area of 10 to 800 m 2 /g, which inorganic material is selected from the group consisting of activated charcoal, asbestos, a surface-active silicic acid and a zeolite.
Claim 3
Dependent Claim
46 words
The polyol mixture of claim 1 wherein component (a) is a combination of 1. at least one low-molecular weight polyol with a hydroxyl number about 800 to about 1800, and 2. at least one higher-molecular weight polyol with hydroxyl number of about 28 to about 84.
Claim 4
Dependent Claim
22 words
The polyol mixture of claim 2 wherein the proportion by weight of component (1) to component (2) is between 60:40 and 10:90.
Claim 5
Dependent Claim
30 words
The polyol mixture of claim 1 wherein component (b) is a silicic acid agglomerate, a chrysotile asbestos or an inorganic material which corresponds to chrysotile asbestos in its mineral structure.
Claim 6
Independent Claim
60 words
A method for stabilizing a mixture of polyols which normally separates into phases against such separation which comprises including a stabilizing amount of an inert surface-active inorganic material having a specific surface area of 10 to 800 m 2 /g, which inorganic material is selected from the group consisting of activated charcoal, asbestos, a surface-active silicic acid and a zeolite.
Claim 7
Independent Claim
60 words
A method for stabilizing a mixture of polyols which normally separates into phases against such separation which comprises including a stabilizing amount of an inert surface-active inorganic material having a specific surface area of 10 to 800 m 2 /g, which inorganic material is selected from the group consisting of activated charcoal, asbestos, a surface-active silicic acid and a zeolite.
Claim 8
Dependent Claim
27 words
The method of claim 5 wherein said inorganic material is added in an amount between about 0.05 and 5.0 wt.% based on the total weight of polyols.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |