GB1118444A - Microporous polymer films and their preparation - Google Patents

Microporous polymer films and their preparation

Info

Publication number
GB1118444A
GB1118444A GB4284665A GB4284665A GB1118444A GB 1118444 A GB1118444 A GB 1118444A GB 4284665 A GB4284665 A GB 4284665A GB 4284665 A GB4284665 A GB 4284665A GB 1118444 A GB1118444 A GB 1118444A
Authority
GB
United Kingdom
Prior art keywords
film
polymer
butadiene
substrate
tie coat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4284665A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WR Grace and Co
Original Assignee
WR Grace and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WR Grace and Co filed Critical WR Grace and Co
Publication of GB1118444A publication Critical patent/GB1118444A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/22—Polyalkenes, e.g. polystyrene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Paper (AREA)

Abstract

Microporous polymer films are made by coating a substrate with a polymer dispersion and heating to gel the polymer and dry the film while maintaining above the film an atmosphere which is more than 90% but less than 100% saturated with the vapour of the dispersion medium. The substrate may form part of the finished product, in which case a tie coat is first applied, or may be such, e.g. a silicone coated paper, that the resulting film can be stripped therefrom. The dispersion medium is preferably water. Pore size may be controlled by the viscosity of the dispersion, by the addition of vapour (other than that arising from the film) and by the temperature. Examples are given of the production of porous films from carboxylated butadiene/acrylonitrile rubber (on a cellulosic substrate impregnated with a styrene/butadiene polymer tie coat), polyvinyl acetate (on a paper substrate), neoprene (on paper), carboxylated butadiene/acrylonitrile rubber (self-supporting film) and vinyl acetate/dibutyl-maleate copolymer (on a cellulosic substrate impregnated with a styrene/butadiene tie coat). Measured pore sizes vary from 0.0125 mm. to 0.075 mm. with the pores occupying a few per cent of the surface area. Film thicknesses specified are 1 to 5 mils.ALSO:Microporous polymer films are made by coating a substrate with a polymer dispersion and heating to gel the polymer and dry the film while maintaining above the film an atmosphere which is more than 90% but less than 100% saturated with the vapour of the dispersion medium. The substrate may form part of the finished product, in which case a tie coat is first applied, or may be such, e.g. a silicone coated paper, that the resulting film can be stripped therefrom. The dispersion medium is preferably water. Pore size may be controlled by the viscosity of the dispersion, by the addition of vapour (other than that arising from the film) and by the temperature. Examples are given of the production of porous films from carboxylated butadiene/acrylonitrile rubber (on a cellulosic substrate impregnated with a styrene/butadiene polymer tie coat), polyvinyl acetate (on a paper substrate), neoprene (on paper), carboxylated butadiene/acrylonitrile rubber (self-supporting film) and vinyl acetate/dibutylmaleate copolymer (on a cellulosic substrate impregnated with a styrene/butadiene tie coat). Measured pore sizes vary from 0.0125 mm to 0.075 mm with the pores occupying a few per cent of the surface area. Film thicknesses specified are 1 to 5 mils.
GB4284665A 1964-10-09 1965-10-08 Microporous polymer films and their preparation Expired GB1118444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40293964A 1964-10-09 1964-10-09

Publications (1)

Publication Number Publication Date
GB1118444A true GB1118444A (en) 1968-07-03

Family

ID=23593885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4284665A Expired GB1118444A (en) 1964-10-09 1965-10-08 Microporous polymer films and their preparation

Country Status (3)

Country Link
DE (1) DE1544987A1 (en)
FR (1) FR1508072A (en)
GB (1) GB1118444A (en)

Also Published As

Publication number Publication date
DE1544987A1 (en) 1969-08-14
FR1508072A (en) 1968-01-05

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