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US3779855A
Expired / Lapsed
US
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Poromeric materials
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1972-04-24
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Granted: 1973-12-18
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Expires: 1992-04-24
Abstract
Abstract Poromeric materials for footwear and other purposes are made from a non-woven fabric, a porous layer of certain defined foamed resins, and a thin microporous surface film. The foam is obtained from lattices containing liquid unsaturated polyester resins and acrylic and/or acrylonitrile resins.
Inventors
- 👤 G Fonzi
- 👤 S Vargiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:53
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; B; B32; B32B; B32B5/00; B32B5/02; B32B5/022; B32B27/00; B32B27/06; B32B27/065; B32B27/12; B32B27/30; B32B27/308; B32B27/36; B32B5/18; B32B5/22; B32B5/24; B32B5/245; D; D06; D06N; D06N3/00; D06N3/04; D06N3/042; D06N3/12; D06N3/121; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0242; B32B2266/0264; B32B2305/00; B32B2305/02; B32B2305/026; B32B2305/10; B32B2305/20; B32B2333/00; B32B2367/00; B32B2437/00; B32B2437/02; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249953; Y10T428/249978; Y10T428/26; Y10T442/00; Y10T442/60; Y10T442/647; Y10T442/649; Y10T442/652
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
Poromeric materials as in claim 1, characterised in that coagulation is carried out at a temperature of 90* to 160*C, using foam produced by dispersing air into an aqueous latex with an overall concentration of liquid unsaturated polyester resins and acrylic and/or acrylonitrile resins in excess of 45 percent by weight, the quantity of air being such that the volumetric ratio of latex to air is from 4:1 to 1:2.
Claim 2
Dependent Claim
45 words
Poromeric materials as in claim 1, characterised in that the overall concentration of resins in the latex is from 50 to 60 percent by weight while the air is dispersed in such a quantity that the volumetric ratio of latex to air is around 2:1.
Claim 3
Dependent Claim
42 words
Poromeric materials as in claim 1, characterised in that the foams are coagulated after having been spread onto the non-woven fabric or into the microporous film in a quantity of between 50 to 500 g per sq. m of the surfAce area.
Claim 4
Dependent Claim
101 words
Poromeric materials as in claim 1, characterised in that the liquid unsaturated polyester resins are constituted by: a product of polycondensation having an acid number of 5 to 50, obtained from maleic and/or fumaric acid and polyhydroxy compounds, the said polyhydroxy compounds consisting of 2 to 50 percent by weight of polyoxyethylene glycols of a molecular weight of 150 to 3000 and preferably 500 to 1500, the remainder ethylene and/or propylene glycol; styrene in a quantity of 15 to 50 percent by weight with respect to the product of polycondensation; an emulsion stabiliser selected from compounds having the following general formula:
Claim 5
Dependent Claim
30 words
Poromeric materials as in claim 5, characterised in that as stabilisers for the liquid unsaturated polyester resins, 2,4,6-tri(dimethyla minomethyl) phenol, 2,4,6-tri(diethylaminomethyl) phenol, 2,4,6-tri (methylethylaminomethyl) phenol or 2,4,6-tri(dimethylaminoethyl) phenol is used.
Claim 6
Dependent Claim
45 words
Poromeric materials as in claim 1, characterised in that in the liquid unsaturated polyester resins, maleic and/or fumaric acids are partially substituted by phthalic acids so that the molar ratio of the maleic and/or fumaric acids to the phthalic acids is from 0.5:1 to 2:1.
Claim 7
Dependent Claim
28 words
Poromeric materials as in claim 1, characterised in that the liquid unsaturated polyester resins are used as stable emulsions containing up to 80 percent by weight of water.
Claim 8
Dependent Claim
58 words
Poromeric materials as in claim 1, characterised in that coagulation is carried out at a temperature of 90* to 260*C in the presence of a peroxide in a quantity of 0.1 to 3 percent by weight of the liquid unsaturated polyester, the said peroxide being preferably selected from the class consisting of lauroylperoxide, methylethylketone peroxide and cumene hydroperoxide.
Claim 9
Dependent Claim
53 words
Poromeric materials as in claim 1, characterised in that the non-woven fabrics are used which are obtained from natural, artificial or man-made fibres, alone or in mixture with one another, with a thickness of 0.2 to 2.5 mm, preferably 0.4 to 1.2 mm, and with a fleece density of 0.40 to 0.50 g/cc.
Claim 10
Dependent Claim
29 words
Poromeric materials as in claim 1, characterised in that products obtained from polyurethane resins, esters of cellulose or acrylic or acrylonitrile resins, are used as a microporous surface coating.
References Cited (Backward Citations)
US3262805A
Cited
US3713868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |