EP0105634A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Porous cross-linked absorbent polymeric materials
Assignee: Unilever PLC
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Filing: 1983-09-06
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Granted: —
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Expires: 2003-09-06
Abstract
Abstract Porous, cross-linked polymeric materials comprising hydrocarbon residues can be sulphonated to produce sulphonated polymers which are able to absorb large volumes of ionic solutions and also act as ion-exchange resins.
Inventors
- 👤 Zia Haq
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:56
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08F; C08F8/00; C08F8/34; C08F8/36; C08J2325/00; C08J2325/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A sulphonated, porous, cross-linked polymeric material comprising sulphonated, hydrocarbon residues prepared by sulphonating a porous, cross-linked polymeric material, having a pore volume in the range greater than 3.0 upto 99.5 cc/g, the sulphonated material having an absorbency for 10% aqueous chloride of at least 3 g/g of dry sulphonated material or salt thereof.
Claim 2
Dependent Claim
53 words
A sulphonated, porous, cross-linked polymeric material comprising sulphonated, hydrocarbon residues prepared by sulphonating a porous, cross-linked polymeric material, having a pore volume in the range greater than 3.0 upto 99.5 cc/g, the sulphonated material having an absorbency for 10% aqueous chloride of at least 3 g/g of dry sulphonated material or salt thereof.
Claim 3
Dependent Claim
26 words
A sulphonated, porous, cross-linked polymeric material as claimed in claim 1, in which the polymer to be .sulphonated has a pore volume greater than 8 cc/g.
Claim 4
Dependent Claim
25 words
A sulphonated, porous, cross-linked polymeric material as claimed in claim 1 or 2, in which the degree of sulphonation is greater than 15% styrene equivalent.
Claim 5
Dependent Claim
30 words
A sulphonated-, porous, cross-linked polymeric material as claimed in claim 1, 2 or 3, in which at least 15% of the monomers to be polymerised are capable of being sulphonated.
Claim 6
Dependent Claim
75 words
A sulphonated porous, cross-linked polymeric material as claimed in claim 2 in a dried collapsed form in which the pore volume is in the range 8 to 99.5 cc/g and in which the degree of cross-linking is related to the pore volume and is in the range 0.5 to 8% and in which the weight percentage sulphonation is related to the pore volume and degree of cross-linking and in the range 60 to 15 respectively.
Claim 7
Dependent Claim
30 words
A polymeric material in a dried collapsed form as claimed in claim 5, in which the bulk density of the polymer in the collapsed form is greater than 0.5 g/cc.
Claim 8
Dependent Claim
30 words
A sulphonated porous, cross-linked polymeric material as claimed in claim 2 in which the level of cross-linking is less than 10% and the degree of sulphonation is greater than 60%.
Claim 9
Dependent Claim
42 words
A sulphonated porous, cross-linked polymeric material as claimed in any one of the preceding claims in which the pore volume is greater than 35cc/g and the level of cross-linking is between 5 and 20% and the degree of sulphonation is above 85%.
Claim 10
Dependent Claim
74 words
A process for the preparation of a sulphonated, porous, homogenous, cross-linked polymeric material as claimed in any one of the preceding claims in which a high internal phase emulsion system is prepared by the slow addition of an aqueous internal phase to a monomer phase comprising hydrocarbon monomer and emulsifying agent, using moderate shear stirring and the emulsion is thermally polymerised in a container and the porous polymeric structure produced sulphonated by known means.
References Cited (Backward Citations)
No citation records indexed.
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