US3886112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl alcohol based composition and articles made therefrom
Assignee: Polymer Films Inc
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Filing: 1973-12-17
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Granted: 1975-05-27
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Expires: 1993-12-17
Abstract
Abstract Disclosed is a plastic composition which is insoluble in small volumes of water including body fluids and soluble in large volumes of water and consisting of partially hydrolyzed polyvinyl alcohol resin with a gelling amount of a water soluble borate salt. This composition is moldable, extrudable and resilient. It can be formed into film and various shaped objects such as toys and disposable sanitary napkin barrier films.
Inventors
- 👤 John J Watson
- 👤 Alice W Pucknat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61L15/18; C; C08; C08K; C08K3/00; C08K3/38; C08K5/00; C08K5/04; C08K5/05
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A COMPOSITION OF MATTER CHARACTERIZED BY INSOLUBILITY IN SMALL VOLUMES OF WATER AND SOLUBILITY IN LARGER VOLUMES OF SAME, (COMPRISING) CONSISTING ESSENTIALLY OF FROM 65 TO 98 WEIGHT % OF HOT AND COLD WATER SOLUBLE, PARTIALLY HYDROLYZED POLYVINYL ALCOHOL: THE DEGREE OF HYDROLYSIS OF SAID ALCOHOL BEING SUCH AS TO IMPART SAID INSOLUBILITY AND SOLUBILITY TO SAID COMPOSITION AND BEING AT LEAST 86%; FROM 0.1 TO 35 WEIGHT % OF AT LEAST ONE PLASTICIZER; AND FROM 0.1% TO 5% OF A (METAL) BORATE SALT (.) OF SODIUM OR POTASSIUM.
Claim 2
Dependent Claim
89 words
A COMPOSITION OF MATTER CHARACTERIZED BY INSOLUBILITY IN SMALL VOLUMES OF WATER AND SOLUBILITY IN LARGER VOLUMES OF SAME, (COMPRISING) CONSISTING ESSENTIALLY OF FROM 65 TO 98 WEIGHT % OF HOT AND COLD WATER SOLUBLE, PARTIALLY HYDROLYZED POLYVINYL ALCOHOL: THE DEGREE OF HYDROLYSIS OF SAID ALCOHOL BEING SUCH AS TO IMPART SAID INSOLUBILITY AND SOLUBILITY TO SAID COMPOSITION AND BEING AT LEAST 86%; FROM 0.1 TO 35 WEIGHT % OF AT LEAST ONE PLASTICIZER; AND FROM 0.1% TO 5% OF A (METAL) BORATE SALT (.) OF SODIUM OR POTASSIUM.
Claim 3
Dependent Claim
15 words
The composition of claim 1, wherein said polyvinyl alcohol is from 86% to 88% hydrolyzed.
Claim 4
Dependent Claim
10 words
A shaped article formed from the composition of claim 1.
Claim 5
Dependent Claim
25 words
The composition of claim 1 wherein said plasticizer is selected from the group of glycerol, hexanediol, triethylene glycol, trimethylol propane, propylene glycol and mixtures thereof.
Claim 6
Dependent Claim
7 words
The composition of claim 1, consisting of:
Claim 7
Dependent Claim
7 words
The composition of claim 1, consisting of:
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |