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US4102807A
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Hydrous gel and process for its preparation
Assignee: Nitto Denko Corp
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Filing: 1976-04-23
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Granted: 1978-07-25
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Expires: 1996-04-23
Abstract
Abstract A hydrous gel consisting essentially of a heat-moldable w/o emulsion comprising about 15 to about 95% by weight of a continuous phase of an A-B-A type teleblock copolymeric elastomer and an oil component and about 85 to about 5% by weight of an emulsified dispersed water phase. The hydrous gel is prepared by dissolving the teleblock copolymeric elastomer in an excess of the oil component by heating, adding an emulsifier and water to the solution to disperse the water therein and to form the w/o emulsion, and then cooling the resulting emulsion to room temperature. The hydrous gel finds a wide range of utility, for example, as an insulator, especially to maintain low or high temperature environments, as a fireproofing material, as a heat absorbant, and as a hospital mat.
Inventors
- 👤 Akio Iwama
- 👤 Isao Mune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:08
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/048; C; C08; C08L; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S524/00; Y10S524/916
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
135 words
A hydrous gel consisting essentially of a heat-moldable w/o emulsion composed of about 15 to about 95% by weight of a continuous phase consisting of an A-B-A type teleblock copolymeric elastomer which consists of a hard polymer block A of vinyl compound and a soft polymer block B of a conjugated diene and an oil component and about 85 to about 5% by weight of a dispersed water phase resulting from the emulsification of water particles by an emulsifier having the property of forming a dispersed phase of innumerable emulsified water particles in the continuous phase consisting of the teleblock elastomer and the oil component and maintaining the form of the w/o emulsion in a stable fashion, said hydrous gel being capable of providing a gel product containing emulsified water particles stable at room temperature.
Claim 2
Dependent Claim
135 words
A hydrous gel consisting essentially of a heat-moldable w/o emulsion composed of about 15 to about 95% by weight of a continuous phase consisting of an A-B-A type teleblock copolymeric elastomer which consists of a hard polymer block A of vinyl compound and a soft polymer block B of a conjugated diene and an oil component and about 85 to about 5% by weight of a dispersed water phase resulting from the emulsification of water particles by an emulsifier having the property of forming a dispersed phase of innumerable emulsified water particles in the continuous phase consisting of the teleblock elastomer and the oil component and maintaining the form of the w/o emulsion in a stable fashion, said hydrous gel being capable of providing a gel product containing emulsified water particles stable at room temperature.
Claim 3
Dependent Claim
64 words
The hydrous gel of claim 1, wherein the hard polymer block A has a glass transition point of at least about 70° C and an average molecular weight of about 1,000 to about 100,000, and the soft polymer block B has a glass transition point of about -50° C to about 30° C and an average molecular weight of about 4,500 to about 1,000,000.
Claim 4
Dependent Claim
28 words
The hydrous gel of claim 1, wherein the oil component is selected from the group consisting of machine oils, cylinder oils, transformer oils, rosin oils and liquid paraffins.
Claim 5
Dependent Claim
31 words
The hydrous gel of claim 1, wherein the amount of the oil component is 100 parts by weight per about 5 to about 30 parts by weight of the teleblock elastomer.
Claim 6
Dependent Claim
31 words
The hydrous gel of claim 3, wherein the amount of the oil component is 100 parts by weight per about 5 to about 30 parts by weight of the teleblock elastomer.
Claim 7
Dependent Claim
37 words
The hydrous gel of claim 1, wherein a cross-linking agent for the teleblock elastomer is incorporated in an amount of about 0.01 to about 2 parts by weight per 100 parts by weight of the teleblock elastomer.
Claim 8
Dependent Claim
15 words
The hydrous gel of claim 1, wherein the emulsifier is a nonionic surface active agent.
Claim 9
Dependent Claim
28 words
The hydrous gel of claim 1, wherein the amount of the emulsifier is about 1 to about 20 parts by weight per 100 parts by weight of water.
Claim 10
Dependent Claim
28 words
The hydrous gel of claim 6, wherein the amount of the emulsifier is about 1 to about 20 parts by weight per 100 parts by weight of water.
Claim 11
Dependent Claim
28 words
The hydrous gel of claim 1, wherein the amount of the emulsifier is about 5 to about 10 parts by weight per 100 parts by weight of water.
Claim 12
Dependent Claim
28 words
The hydrous gel of claim 6, wherein the amount of the emulsifier is about 5 to about 10 parts by weight per 100 parts by weight of water.
Claim 13
Dependent Claim
145 words
A process for preparing a hydrous gel, which comprises dissolving an A-B-A teleblock copolymeric elastomer consisting of a hard polymer block A of a vinyl compound and a soft polymer block B of a conjugated diene in an excess of an oil component by heating, adding an emulsifier which has the property of forming a dispersed phase of innumerable emulsified water particles in the continuous phase consisting of the tele-block elastomer and the oil component and maintains the form of the w/o emulsion in a stable fashion and water to the resulting solution to disperse water therein and to form a w/o emulsion containing about 15 to about 95% by weight of a continuous phase consisting of the elastomer and the oil component and about 85 to about 5% by weight of an emulsified dispersed water phase, and then cooling the emulsion to room temperature.
Claim 14
Dependent Claim
145 words
A process for preparing a hydrous gel, which comprises dissolving an A-B-A teleblock copolymeric elastomer consisting of a hard polymer block A of a vinyl compound and a soft polymer block B of a conjugated diene in an excess of an oil component by heating, adding an emulsifier which has the property of forming a dispersed phase of innumerable emulsified water particles in the continuous phase consisting of the tele-block elastomer and the oil component and maintains the form of the w/o emulsion in a stable fashion and water to the resulting solution to disperse water therein and to form a w/o emulsion containing about 15 to about 95% by weight of a continuous phase consisting of the elastomer and the oil component and about 85 to about 5% by weight of an emulsified dispersed water phase, and then cooling the emulsion to room temperature.
Claim 15
Dependent Claim
40 words
The hydrous gel of claim 7, wherein the emulsifier is a nonionic surface active agent selected from the group consisting of polyethylene glycol monooleyl ether, polyethylene glycol mononyl phenyl ether, polyethylene glycol monododecyl phenyl ether and polyethylene glycol monolauryl ether.
Claim 16
Dependent Claim
32 words
The hydrous gel of claim 7, wherein the emulsifier is a nonionic surface active agent selected from the group consisting of sorbitan monolaurate, sorbitan monooleate, sorbitan sesquioleate, sorbitan monostearate and sorbitan monopalmitate.
Claim 17
Dependent Claim
63 words
The process of claim 12, wherein the hard polymer block A has a glass transition point of at least about 70° C and an average molecular weight of about 1,000 to about 100,000, and the soft polymer block B has a glass transition point of about -50° C to about 30° C and an average molecular weight of about 4,500 to about 1,000,000.
Claim 18
Dependent Claim
27 words
The process of claim 12, wherein the oil component is selected from the group consisting of machine oils, cylinder oils, transformer oils, rosin oils and liquid paraffins.
Claim 19
Dependent Claim
14 words
The process of claim 12, wherein the emulsifier is a nonionic surface active agent.
Claim 20
Dependent Claim
30 words
The process of claim 12, wherein the amount of the oil component is 100 parts by weight per about 5 to about 30 parts by weight of the teleblock elastomer.
Claim 21
Dependent Claim
27 words
The process of claim 12, wherein the amount of the emulsifier is about 1 to about 20 parts by weight per 100 parts by weight of water.
Claim 22
Dependent Claim
18 words
The process of claim 12, wherein the heating is a temperature of about 80° to about 170° C.
Claim 23
Dependent Claim
39 words
The hydrous gel of claim 1 wherein the hydrous gel is characterized by being easily deformed upon application of stress but substantially completely returns to its original state in about 1 to 2 minutes after removal of the stress.
Claim 24
Dependent Claim
35 words
The hydrous gel of claim 1 having a viscosity of 10 to about 500 poises at a temperature of 80° C or higher and being a non-flowable oily gel at room temperature to 50° C.
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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |