Patent US4212918A successfully refreshed from Google Patents.
US4212918A
Expired / Lapsed
US
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Nontacky shaped objects from polymer latices
Assignee: EIDP Inc
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Filing: 1977-09-30
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Granted: 1980-07-15
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Expires: 1997-09-30
Abstract
Abstract Nontacky, elastomeric shaped objects (e.g., pellets or filaments) comprising a normally tacky, uncured elastomer having an integral, porous coating of silicic or aluminic acid polymer can be prepared by bringing shaped bodies of a normally tacky, uncured elastomer latex into contact with an aqueous bath containing a soluble coagulating salt for the latex, and a silicic or aluminic acid polymer, and washing and drying the resulting coated shaped objects. The shaped objects are highly porous before washing and drying, and some porosity remains even after washing and drying.
Inventors
- 👤 Mark J. Marquisee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:37
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; B; B29; B29B; B29B9/00; B29B9/10; C08J3/20; C08J3/205; C08J3/21; C08J3/212; C08J9/00; C08J9/26; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2998
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
A washed and dried nontacky, elastomeric shaped object which comprises a normally tacky, uncured elastomer containing, based on the total weight of the shaped object, less than 3% by weight of water soluble material and less than 1% by weight of volatile material, and having 0.05 to 3% by weight of an integral, porous coating of a water insoluble, hydrous, inorganic oxide selected from the group consisting of silicic acid polymers, aluminic acid polymers, silicic acid-aluminic acid copolymers, and mixtures thereof, substantially all of said inorganic oxide being present as a coating, and said shaped object having a minimum dimension of 0.01 to 10 millimeters.
Claim 2
Dependent Claim
105 words
A washed and dried nontacky, elastomeric shaped object which comprises a normally tacky, uncured elastomer containing, based on the total weight of the shaped object, less than 3% by weight of water soluble material and less than 1% by weight of volatile material, and having 0.05 to 3% by weight of an integral, porous coating of a water insoluble, hydrous, inorganic oxide selected from the group consisting of silicic acid polymers, aluminic acid polymers, silicic acid-aluminic acid copolymers, and mixtures thereof, substantially all of said inorganic oxide being present as a coating, and said shaped object having a minimum dimension of 0.01 to 10 millimeters.
Claim 3
Dependent Claim
12 words
The shaped object of claim 1 in which the elastomer is neoprene.
Claim 4
Dependent Claim
55 words
The shaped object of claim 2 in which the coating is 0.5 to 2% by weight of the shaped object, the shaped object contains less than 1% by weight of water soluble material and less than 0.5% by weight of volatile material, and the minimum dimension of the shaped object is 0.1 to 5 millimeters.
Claim 5
Dependent Claim
16 words
The shaped object of claim 3 in which the inorganic oxide is a silicic acid polymer.
Claim 6
Dependent Claim
19 words
The shaped object of claim 4 in the form of a neoprene fiber having a silicic acid polymer coating.
Claim 7
Dependent Claim
16 words
The shaped object of claim 4 in which the inorganic oxide is an aluminic acid polymer.
Claim 8
Dependent Claim
22 words
The shaped object of claim 1 in which the elastomer is a fluoropolymer and the inorganic oxide is a silicic acid polymer.
Claim 9
Dependent Claim
100 words
A highly porous, nontacky, elastomeric shaped object which comprises normally tacky, uncured elastomer having 0.05 to 3% by weight of an integral, porous coating of a water insoluble, hydrous, inorganic oxide selected from the group consisting of silicic acid polymers, aluminic acid polymers, silicic acid-aluminic acid copolymers, and mixtures thereof, substantially all of said inorganic oxide being present as a coating, and said shaped object having a minimum dimension of 0.01 to 10 millimeters, an opaque appearance when the object is dispersed in water and a vesicular structure when a cross section of the object is observed in a micrograph.
Claim 10
Dependent Claim
100 words
A highly porous, nontacky, elastomeric shaped object which comprises normally tacky, uncured elastomer having 0.05 to 3% by weight of an integral, porous coating of a water insoluble, hydrous, inorganic oxide selected from the group consisting of silicic acid polymers, aluminic acid polymers, silicic acid-aluminic acid copolymers, and mixtures thereof, substantially all of said inorganic oxide being present as a coating, and said shaped object having a minimum dimension of 0.01 to 10 millimeters, an opaque appearance when the object is dispersed in water and a vesicular structure when a cross section of the object is observed in a micrograph.
Claim 11
Dependent Claim
21 words
The shaped object of claim 8 in which the elastomer is neoprene and the inorganic oxide is a silicic acid polymer.
Claim 12
Dependent Claim
26 words
The shaped object of claim 9 which contains less than 3% by weight of water soluble material and less than 1% by weight of volatile material.
Claim 13
Dependent Claim
55 words
The shaped object of claim 10 in which the coating is 0.5 to 2% by weight of the shaped object, the shaped object contains less than 1% by weight of water soluble material and less than 0.5% by weight of volatile material, and the minimum dimension of the shaped object is 0.1 to 5 millimeters.
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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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |