Supports for electrophoresis and process for the production of the same

Claim 2

A support for electrophoresis comprising a porous polymer film having an electroendosmosis factor of 0 to plus about 10 mm, pore diameter of about 0.1 to 10 microns and voids of not less than 50%.

Claim 3

The support according to claim 1, wherein the polymer constituting the porous polymer film is a nonionic polymer having a molecular weight of from about 10,000 to about 50,000.

Claim 4

The support according to claim 2, wherein the polymer constituting the porous polymer film is selected from the group consisting of nitrocellulose, acetyl cellulose, acetylbutyl cellulose, cellulose propionate, a polyamide resin, and a polyvinyl chloride resin.

Claim 5

A process for producing a support for electrophoresis comprising a porous polymer film having a pore diameter of about 0.1 to about 10 microns, an electroendosmosis factor of 0 to plus about 10 mm, and voids of not less than 50% which comprises adding 1 to 15% by weight of polymer of a nonionic surface active agent, a cellulose ether or a mixture thereof to a mixed solution comprising at least one polymer material for formation of a film and a solvent, and forming said porous polymer film from said mixed solution.

Claim 6

A process for producing a support for electrophoresis comprising a porous polymer film having a pore diameter of about 0.1 to about 10 microns, an electroendosmosis factor of 0 to plus about 10 mm, and voids of not less than 50% which comprises adding 1 to 15% by weight of polymer of a nonionic surface active agent, a cellulose ether or a mixture thereof to a mixed solution comprising at least one polymer material for formation of a film and a solvent, and forming said porous polymer film from said mixed solution.

Claim 7

The process according to claim 4, wherein the solvent contains a good solvent for said polymer and at least one solvent selected from the group consisting of a poor and a non-solvent for said polymer, said good solvent being a solvent capable of dissolving the polymer material, said poor solvent being a solvent which is mutually soluble with said good solvent but does not substantially dissolve the polymer material but only swells the polymer material and has a higher boiling point than said good solvent, and the non-solvent being a solvent which is mutually soluble with good solvent or poor solvent, but neither dissolves nor swells the polymer material and has a higher boiling point than said good solvent.

Claim 8

The process according to claim 4, wherein the nonionic surface active agent has a molecular weight of about 500 to about 10,000.

Claim 9

The process according to claim 4, wherein the nonionic surface active agent is selected from the group consisting of polyoxyalkylene alkylaryl ethers and polyoxyalkylene sorbitan alkyl esters.

Claim 10

A support for electrophoresis comprising a porous polymer film which contains 1 to 15 weight percent of the polymer of a non-ionic surface active agent, a cellulose ether or a mixture thereof, said support having an electroendosmosis factor of 0 to plus about 10 mm, pore diameter of about 0.1 to about 10 microns and voids of not less than 50%.

Claim 11

A support for electrophoresis comprising a porous polymer film which contains 1 to 15 weight percent of the polymer of a non-ionic surface active agent, a cellulose ether or a mixture thereof, said support having an electroendosmosis factor of 0 to plus about 10 mm, pore diameter of about 0.1 to about 10 microns and voids of not less than 50%.

Claim 12

The support of claim 8 wherein only cellulose ether is employed.