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US4127547A
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US
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Hydrogel dough composition for fabrication of foamed articles
Assignee: BP Corp North America Inc
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Filing: 1974-12-23
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Granted: 1978-11-28
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Expires: 1994-12-23
Abstract
Abstract Foamed, low density polymeric articles have been fabricated from a non-tacky hydrogel obtained by blending normally solid thermoplastic polymer resin with a normally liquid organic solvent and water, at lower molding temperatures and energy requirements than those conventionally used in melt extrusion foam processing.
Inventors
- 👤 Walter H. Smarook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:34
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; B; B29; B29C; B29C44/00; B29C44/02; B29C44/10; B29C67/00; B29C67/20; B29C67/202; B29C33/00; B29C33/38; B29K; B29K2105/00; B29K2105/06; B29K2105/16; B29L; B29L2009/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A composition suitable for fabricating low density foamed articles consisting essentially of a non-tacky hydrogel dough obtained by mixing: (a) at least one normally solid thermoplastic polyarylene polyether polysulfone resin with about 25 to about 80 parts per hundred parts by weight of said resin of a normally liquid organic solvent having of solubility parameter, δ, within about (1.3 calories/cc.) 1/2 of that of said resin or a mixture of normally liquid organic solvents having an average solubility parameter, δ, within about (1.3 calories/cc.) 1/2 of that of said resin; and (b) at least one part by weight of water per 100 parts by weight of said resin completely until a white, homogeneous mixture of polyarylene polyether polysulfone resin, solvent, and water is obtained.
Claim 2
Dependent Claim
124 words
A composition suitable for fabricating low density foamed articles consisting essentially of a non-tacky hydrogel dough obtained by mixing: (a) at least one normally solid thermoplastic polyarylene polyether polysulfone resin with about 25 to about 80 parts per hundred parts by weight of said resin of a normally liquid organic solvent having of solubility parameter, δ, within about (1.3 calories/cc.) 1/2 of that of said resin or a mixture of normally liquid organic solvents having an average solubility parameter, δ, within about (1.3 calories/cc.) 1/2 of that of said resin; and (b) at least one part by weight of water per 100 parts by weight of said resin completely until a white, homogeneous mixture of polyarylene polyether polysulfone resin, solvent, and water is obtained.
Claim 3
Dependent Claim
13 words
The hydrogel dough claimed in claim 1 wherein the solvent is methylene chloride.
Claim 4
Dependent Claim
12 words
The hydrogel dough claimed in claim 1 wherein the solvent is 1,1,2-trichloroethane.
Claim 5
Dependent Claim
52 words
The hydrogel dough claimed in claim 1 wherein the resin is a polyarylene polyether polysulfone containing repeating units having the formula: --Ar-SO.sub.2 -- wherein Ar is a divalent aromatic radical containing at least one unit having the structure: ##STR11## wherein Y is oxygen, sulfur or the radical residuum of an aromatic diol.
Claim 6
Dependent Claim
25 words
The hydrogel dough claimed in claim 4 wherein the polyarylene polyether polysulfone repeating units have the formula: ##STR12## wherein n is 10 to about 500.
Claim 7
Dependent Claim
15 words
The hydrogel dough claimed in claim 1 wherein the solvent is a mixture of solvents.
Claim 8
Dependent Claim
20 words
The hydrogel dough claimed in claim 6 wherein the mixture of solvents is a mixture of ethanol and methylene chloride.
Claim 9
Dependent Claim
19 words
The hydrogel dough claimed in claim 6 wherein the mixture of solvents is a mixture of 1,1,1-trichloroethane and ethanol.
References Cited (Backward Citations)
US2450436A
Cited
US2515250A
Cited
US2537977A
Cited
US2669751A
Cited
US2739909A
Cited
US2774991A
Cited
US3264536A
Cited
US3668161A
Cited
US3959197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |