EP0289238A2
Expired / Lapsed
EP
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Porous material and its preparation
Assignee: Unilever PLC
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Filing: 1988-04-22
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Granted: —
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Expires: 2008-04-22
Abstract
Abstract A porous polymeric material has cell sizes within the range 100 to 0.5µm and total pore volume with respect to the overall volume of the material in the range 75 to 98% and includes cross-linked polycondensation polymeric material. The material can be made from a high internal phase emulsion in which the cross-linked polycondensation polymer is formed in the continuous phase. The materials are preferably open interconnected cellular structures. They can be made of a wide range of polycondensation materials. The materials are thus highly porous and light weight and have a range of properties depending primarily on their constituent polycondensation materials.
Inventors
- 👤 Alfred Roy Elmes
- 👤 Kevin Hammond
- 👤 David Colin Sherrington
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 22:07
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28054; B01J20/28095; B01J20/28097; B01D; B01D15/00; B01D15/08; B01J20/28014; B01J20/28047; B01J20/28069; B01J20/28078; B01J47/00; B01J47/018; C; C07; C07K; C07K1/00; C07K1/04; C07K1/042; C08; C08J; C08J9/00; C08J9/28; B01D15/26; B01D15/36; B01D15/361; C08J2201/00; C08J2201/04; C08J2201/05; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/52; G01N2030/524; G01N2030/528
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
43 words
A porous polymeric material having cell sizes within the range 100 to 0.5µm and total pore volume with respect to that of the overall volume of the material in the range 75 to 98% wherein the polymeric material includes cross-linked polycondensation polymeric material.
Claim 2
Dependent Claim
43 words
A porous polymeric material having cell sizes within the range 100 to 0.5µm and total pore volume with respect to that of the overall volume of the material in the range 75 to 98% wherein the polymeric material includes cross-linked polycondensation polymeric material.
Claim 3
Dependent Claim
29 words
A polymeric material according to claim 1 wherein the cross-linked polycondensation polymeric material is derived from monomers and/or pre-polymers or mixtures thereof having at least two different reactive groups.
Claim 4
Dependent Claim
24 words
A polymeric material according to claim 1 wherein the cross-linked polycondensation polymeric material is derived from at least two types of monomers or pre-polymers.
Claim 5
Dependent Claim
20 words
A polymeric material according to claim 1 wherein the cross-linked polycondensation polymeric material is derived from a polycondensation polymer material.
Claim 6
Dependent Claim
19 words
A polymeric material according to any one of the preceding claims having an overall density of less than 0.25g/cm³.
Claim 7
Dependent Claim
20 words
A polymeric material according to any one of the preceding claims having cell sizes within the range 50 to 0.5µm.
Claim 8
Dependent Claim
28 words
A polymeric material according to any one of the preceding claims in which the cells are interconnected by a plurality of holes in the walls of the cells.
Claim 9
Dependent Claim
25 words
A polymeric material according to claim 7 wherein the holes in the walls of the cells lie in the range 0.2 to 0.05 pore diameter.
Claim 10
Dependent Claim
63 words
A polymeric material according to any one of the preceding claims wherein the cross-linked polycondensation material is selected from the group comprising the polycondensation products between urea and aldehydes, the polycondensation products between phenols and aldehydes, the polycondensation products between resorcinols and aldehydes, polyvinyl formals, polyesters, polyamides, polyacetales, polyurethanes, polysiloxanes, polyimides, polybenzimidazoles, polyethers, polythioethers, polyketals, polyether sulphones and polyether ketones and mixtures thereof.
Claim 11
Dependent Claim
46 words
A process for preparing a porous polymeric material comprising preparing an emulsion whose internal phase comprises 75 to 98 volume % of the material and consists of globules having dimensions in the range 100 to 0.5µm and forming in the continuous phase a cross-linked polycondensation polymer.
Claim 12
Dependent Claim
46 words
A process for preparing a porous polymeric material comprising preparing an emulsion whose internal phase comprises 75 to 98 volume % of the material and consists of globules having dimensions in the range 100 to 0.5µm and forming in the continuous phase a cross-linked polycondensation polymer.
Claim 13
Dependent Claim
11 words
A process according to claim 10 including removing the internal phase.
Claim 14
Dependent Claim
36 words
A process according to claim 10 or claim 11 wherein the formation of the cross-linked polycondensation polymer is initiated by the addition of an acid or base to the emulsion or heating the emulsion or both.
Claim 15
Dependent Claim
38 words
A process according to any one of claims 10 to 12 wherein the reactant materials to form the cross-linked polycondensation polymer are present in the emulsion being either both in the continuous phase or split between the phases.
Claim 16
Dependent Claim
25 words
A process according to claim 10 or claim 11 wherein the emulsion is prepared containing an acid or a base to initiate a polycondensation reaction.
Claim 17
Dependent Claim
25 words
A process according to claim 14 wherein the emulsion contains one reactant material in the continuous phase and is contacted with the second reactant material.
Claim 18
Dependent Claim
20 words
A process according to any one of claims 10 to 15 wherein a polycondensation reaction is completed within 60 minutes.
References Cited (Backward Citations)
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