US4008191A
Expired / Lapsed
US
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Polymer alloy membranes consisting of inherently entangled blends of polymeric phosphonate and second polymer component containing ester groups or polystyrene
Assignee: Yeda Research and Development Co Ltd
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Filing: 1975-04-17
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Granted: 1977-02-15
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Expires: 1995-04-17
Abstract
Abstract The present disclosure relates to improved polymeric materials and to a process for preparing same, which comprises blending suitable polymers into novel polymeric alloys. The disclosure further relates to novel fire-retarding and flame-resistant materials comprising such polymeric alloys and to novel membrane materials and membranes, adapted to provide novel processes of separation based on membrane technology. The novel polymeric alloys comprise commercially available polymers, blended with novel polymeric phosphonates of the general formula: ##STR1## WHEREIN: M, M', N, N' ARE ZERO OR ANY INTEGER, P IS AN INTEGER HIGHER THAN 10 X designates a hydrogen atom halogen atom or a phosphorus Containing group Y designates a CH 2 CHCl or CH 2 CCl 2 group Z and Z' designates H or a phosphonate group - PO(OR') (OR") (at least one being a phosphonate group), wherein R and R' are alkyl or aryl groups.
Inventors
- 👤 Joseph Jagur-Grodzinski
- 👤 David Vofsi
- 👤 Israel Cabasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:11
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/12; B; B01; B01D; B01D71/00; B01D71/06; B01D71/28; B01D71/281; B01D71/76; B01D71/82; C08G; C08G65/00; C08G65/34; C08G65/48; C08G65/485; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L25/18; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; C08L67/00; C08L85/00; C08L85/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A highly permeable membrane containing a dense selective "skin" and a porous support suitable for solvent separation in a pervaporative cell, said membrane having enhanced permeability while retaining its selectivity, comprising an inherently entangled polymer alloy composition of between 20 and 60 percent of a first phosphorus and halogen-containing polymer component having the formula: ##STR3## wherein m and n are zero or any integer and m' and n' are integers, p is an integer higher than 10, X is hydrogen, halogen or a phosphorus-containing group, Y is CH 2 CHCl or CH 2 CCl 2 , and Z and Z' are hydrogen or a phosphonate group (at least one being a phosphonate group); and from 40 to 80 percent of a second polymer component containing ester groups and/or a polystyrene polymer.
Claim 2
Dependent Claim
131 words
A highly permeable membrane containing a dense selective "skin" and a porous support suitable for solvent separation in a pervaporative cell, said membrane having enhanced permeability while retaining its selectivity, comprising an inherently entangled polymer alloy composition of between 20 and 60 percent of a first phosphorus and halogen-containing polymer component having the formula: ##STR3## wherein m and n are zero or any integer and m' and n' are integers, p is an integer higher than 10, X is hydrogen, halogen or a phosphorus-containing group, Y is CH 2 CHCl or CH 2 CCl 2 , and Z and Z' are hydrogen or a phosphonate group (at least one being a phosphonate group); and from 40 to 80 percent of a second polymer component containing ester groups and/or a polystyrene polymer.
Claim 3
Dependent Claim
36 words
The membrane of claim 1, wherein the first polymer component has the formula (I), wherein X = bromine, n = n' = 1, and Z' = PO(OMe) 2 and Z = H or PO(OMe) 2 .
Claim 4
Dependent Claim
36 words
The membrane of claim 1, wherein the first polymer component has the formula (I) wherein X = bromine, n' = n = 1, Z = H and Z' = PO(OMe) 2 , or PO(OEt) 2 .
Claim 5
Dependent Claim
35 words
The membrane of claim 1, wherein the first polymer component has the formula (I) wherein X = H, n = n' = 1, Z = PO(OMe) 2 and Z' = H or PO(OMe) 2 .
Claim 6
Dependent Claim
37 words
The membrane of claim 1, wherein the first polymer component has the formula (II) wherein Y = CH 2 CCl 2 , n = o, n' = 2, Z = H and Z' = PO(OMe) 2 .
Claim 7
Dependent Claim
33 words
The membrane of claim 1, wherein the first polymer component has the formula (II) wherein m = o, n = o, n' = 2, Z = H and Z' = PO(OMe) 2 .
Claim 8
Dependent Claim
13 words
The membrane of claim 1, wherein the second polymer component is acetyl cellulose.
Claim 9
Dependent Claim
15 words
The membrane of claim 1, wherein the second polymer component is an unsaturated polyester resin.
Claim 10
Dependent Claim
13 words
The membrane of claim 1, wherein the second polymer component is a polystyrene.
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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) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |