US3545643A - Package for highly viscous tacky materials - Google Patents

Package for highly viscous tacky materials Download PDF

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Publication number
US3545643A
US3545643A US676097A US3545643DA US3545643A US 3545643 A US3545643 A US 3545643A US 676097 A US676097 A US 676097A US 3545643D A US3545643D A US 3545643DA US 3545643 A US3545643 A US 3545643A
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United States
Prior art keywords
container
coated
silicone
highly viscous
package
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Expired - Lifetime
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US676097A
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English (en)
Inventor
John J Higgins
Nova E Stucker
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ExxonMobil Technology and Engineering Co
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Exxon Research and Engineering Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/34—Coverings or external coatings
    • B65D25/36—Coverings or external coatings formed by applying sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials

Definitions

  • ABSTRACT A packaging container for highly viscous low [50] Field of Search 220/63; 1 molecular weight tacky polymers comprising a container hav- 229/14(B), 3,5;206/84; l61/(Si1icone); ing at least one removable end and a removable polymeric 1 17/ l 38.8(F) liner coated with a release agent.
  • the container of this invention is' suitable for use for such tacky polymers as polyisobutylene having a Staudinger molecular weight of 8,000 to 12,000, polybutenes having Staudinger molecular weights-of about 3,000 to 6,000, low molecular weight butyl rubbers and halogenated butyl rubbers and like compounds which are normally not pourable at room temperature, but exhibit cold flow at room temperature and are sufficiently tacky to be'removed from conventional containers only with difficult
  • the inner liner should be capable of withstanding hot packaging conditions without degradation or softening to the point of adhering to the polymer being packaged.
  • Various polymeric films have been found to be useful for this purpose. Typical of the types of film which may be used are polyester film and heat stabilized nylon.
  • the polymeric film has a thickness of about 0.5 to aboutS mils; more preferably about I to about 3 mils.
  • a particularly suitable'polyester film is the reaction product of ethylene glycol and terephthalic acid which is known to the trade by the duPont trademark Mylarf' I-Ieat stabilized nylons are well known and are prepared by specially heat treating a nylon film. Illustrative of such heat stabilized nylon films is Allied Chemicals Capran 80.
  • release agents may be used in the practice of this invention.
  • the release agents are silicone fluids having a viscosity of about 10 to about 30,000
  • centistokes at 77 F preferably about 50 to 1,000 centistokes, most preferably 100 to 500 centistokes.
  • the materials are well known to the art having carbon to silicon linkages such as disclosed in U.S. Pat. Nos. 2,448,756, 2,484,595 and 2,541,137 which are incorporated herein by reference. These polymers have the general structure:
  • R and R are selected independently from methyl and hydrogen wherein either'R, or R is methyl and the other is methyl or hydrogen. Where both R and R are methyl, the fluids are known as dimethyl silicones or dimethyl siloxanes.
  • the hydrogen attached to the silicon is termed a silanic hydrogen.
  • the silicone fluids of this invention may, if desired, be cured after application to the polymeric film.
  • the fluids may be applied as the neat oil or from a solvent solution.
  • the solvent may be C -C alkanes such as hexane, heptane or 2-ethyl hexane, C to C aromatics such as benezene, toluene or xylene or any of the well known chlorinated solvents such as methylene chloride or chlorobenzene.
  • the silicone fluid is present in the solvent at about 30 wt. percent.
  • R or R of the silicone fluid is hydrogen, that is methyl silicone having silanic hydrogens
  • the fluid is moisture curable below 50 C. in the presence of a catalyst such as dibutyl tin dilaurate, or dibutyl tin di-Z-ethyl hexoate.
  • a catalyst such as dibutyl tin dilaurate, or dibutyl tin di-Z-ethyl hexoate.
  • High temperature cures are accomplished in the presence of catalysts such as zinc octoate.
  • the fluid may be moisture cured by the addition of a silanol and a catalyst such as an or ganic titanate, e. g. tetra-isobutyl titanate and tetra-Z-ethylhexyl titanate.
  • a catalyst such as an or ganic titanate, e. g. tetra-isobutyl titanate and tetra-Z-ethylhexyl titanate.
  • the dimethyl silicones are also available as hydroxy ter-- minated polymers which may be cured in the presence of organic titanates without the addition of silanols to the polymer.
  • Illustrative of the dimethyl silicones are Union Carbide and Carbons L-45 series fluids and General Electric Co.s SF 96 series fluids, both products being available in a wide range of viscosities up to about 100,000 cs at 77 F.
  • Illustrative of silicone fluids having silaniehydrogens are Union Carbide and Carbons L-31 (a silicone fluid having a viscosity of about 35 cs at 77 F.) and Y-4006 fluids and Dow Cornings Dow Coming 23 silicone fluid.
  • the Y-4006 and Dow Corning 23 fluids are supplied as 30 wt. percent neat oil in xylene.
  • Illustrative of the hydroxy terminated dimethly silicones are Union Carbide and Carbons W900 and Y-l480.
  • the thickness of the release agent coating is not critical. However, it is essential that the coating be continuous. For example, a continuous coating whose thickness is in the Angstrom range will suffice, whereas a discontinuous coating of several mils will not release properly.
  • coated release papers are available on the market, such as silicone coated glassine, silicone coated parchment and silicone coated latex treated stock, and are effective as release surfaces, they are not generally suited for use in the practice of this invention since they become excessively embrittled by the heat history of hot packaging and can be removed only in small pieces;
  • cellophane is a satisfactory release surface for the purpose of this invention. It is not embrittled by packaging heat history and may be removed from the packaged polymer without the aid of a release agent.
  • the cellophane may be removed from the packaged polymer by wetting with water.
  • the water breaks the bond between the polymer and the cellophane, and the cellophane, having sufficient cohesive strength, is'removed in one piece.
  • the cellophane film is about 0.5 to about 5 mils in thickness, more preferably about 1 to about 3 mils.
  • cellophane as used in this specification and claims means films produced from wood pulp by the viscose process, known in the trade as uncoated type" cellophanes.
  • cellophane films are the cellophanes known to the trade as type PD, type PUD and type PUD-O cellophanes which are available from E. I. DuPont de Nemours and Co.
  • clay coated kraft paper having a basic weight of at least 50 lbs./ 1,000 ft.*, coated with finely divided mica is a suitable release surface for the purposes of this invention.
  • the clay coated kraft paper has a basic weight of about 50 to about 100 lbs/1,000 ft
  • the finely divided mica should have a platelet shape with a thickness of about 20 to about 200 Angstroms and about 100 times thickness in diameter.
  • the mica is a synthetic mica.
  • synthetic mica is a flourine derivative of phlogopite made by treating potassium flurosilicates with alumina under pressure and heat or by melting basic oxides, fluorides and feldspar together.
  • Illustrative of the synthetic mica coatings which may be used is a product known in the trade by the Minnesota Mining & Manufacturing Co. trademark "Burnil Brand Microplates. Bumil" Brand Microplates are extremely thin platelets of synthetic mica. The average particle size is about 20l00 Angstroms in thickness and about l times thickness in diameter. The platelets have a melting point of 1800 F., a density of 2.7 g/cc and a refractive index of 1.5.
  • container as used throughout this specification is intended to mean any suitable container having vertical sidewalls and at least one end which can be removed or opened.
  • Illustrative of the container materials which may be used are fiber board, corrugated boxes, metal drums and the like.
  • a covered metal can may be supplied with a Mylar bag internally coated with a silicone release agent, the release agent coated Mylar bag being placed into the container and filled with the tacky polymer. The top of the bag is then tied and the cover put in place. When the polymer is ready for use the container is opened, the inner bag and contents removed from the container and the polymer is stripped of the Mylar bag.
  • the container comprises a cylindrically shaped body, 1, having two removable ends, 2, 3, equipped with an inner liner release surface, 4.
  • the removable ends are preferably of metal and coated with a silicone release agent.
  • the inner liner release surface is formed in the shape of a cylinder and several inches longer in length than the container itself, e.g. 3 to 4 inches longer.
  • the inner liner is a waterproof cellophane or a silicone coated Mylar film.
  • the container body, 1, itself must be smooth walled and have no inner lips.
  • the cylindrically formed inner liner, 4 is inserted into the cylindrical container body, 1, and folded back, 5, over the container edges, 6. One removable cylinder end is put in place.
  • the container is then filled with polymer and the remaining removable end put in place and sealed by means of tape, plastic or metal straps and the like.
  • conventional fiber drums may be made having their inner surface coated with synthetic mica.
  • the coating will be accomplished prior to construction of the drum.
  • a light weight (i.e. 50l00 lbs/1,000 ft?) clay coated kraft paper may be glued to the inside of the fiber drum after it has been rolled and removed from the mandrel during manufacture.
  • the mica maybe applied to a finished drum by slush coating using a slurry of synthetic mica having about 5 to about 25 wt. percent solids.
  • the weight of the drum wall will be a function of the size of the container using conventional shipping guidelines. For example, a 15 gallon fiber drum having a lbs. net weight limit would be constructed of a five ply kraft paper wall having a bursting strength of 500 lbs.
  • a packaging container for tacky materials which comrises:
  • a smooth walled cylindrical container having two removable ends, said ends being coated on their inner faces with a silicone release agent selected from the group consisting of dimethyl silicones, methyl silicones containing silanic hydrogens and hydroxy terminated dimethyl silicones, wherein said silicone release agent has a viscosity at 77 F. of about 10 to about 30,000 es; and b.
  • a cylindrical inner liner substantially longer then the cylindrical container, said inner liner being formed from a material selected from the group consisting of (1) a polymeric film wherein said film is heat treated nylon or a polyester film which is the reaction product of ethylene glycol and terephthaiic acid, said liner being coated internaily with a silicone release agent selected from the group consisting of dimethyl silicones, methyl silicones containing silanic hydrogens and hydroxy terminated dimethyl silicones, wherein said silicone release agent has a viscosity at 77 F. of about 10 to about 30,000 centistokes, (2) a clay coated kraft paper having a basic weight of at least 50 lbs./ l ,000 ft. said paper being coated with a finely divided mica, and (3) uncoated cellophane.
  • a silicone release agent selected from the group consisting of dimethyl silicones, methyl silicones containing silanic hydrogens and hydroxy terminated dimethyl silicones, wherein said silicone release agent has a viscosity at

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)
US676097A 1967-10-18 1967-10-18 Package for highly viscous tacky materials Expired - Lifetime US3545643A (en)

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US67609767A 1967-10-18 1967-10-18

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US3545643A true US3545643A (en) 1970-12-08

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648882A (en) * 1970-03-02 1972-03-14 Exxon Research Engineering Co Package for highly viscous tacky materials
US3760971A (en) * 1970-03-23 1973-09-25 Marathon Oil Co Liquid cryogen storage tank for shore, ship or barge
US4339486A (en) * 1979-12-28 1982-07-13 Shin-Etsu Chemical Co., Ltd. Method for temporarily protecting sticky surface and a thus protected adhesive sheet material
US4759445A (en) * 1984-01-23 1988-07-26 Mcvay Malcolm S C Additive package for a method for compounding polymer formulations
US4930644A (en) * 1988-12-22 1990-06-05 Robbins Edward S Iii Thin film container with removable lid and related process
US5060816A (en) * 1988-12-22 1991-10-29 Robbins Edward S Iii Composite container and associated carrier
US5183152A (en) * 1990-09-04 1993-02-02 National Gypsum Company Humectants in joint compound containers
US5465863A (en) * 1993-03-10 1995-11-14 Greif Bros. Corporation Recyclable steel drum for hot flow products
US5802815A (en) * 1994-02-14 1998-09-08 Henkel Kommanditgesellschaft Auf Aktien Process for the self-sealing of containers
US20120279892A1 (en) * 2008-03-18 2012-11-08 Henkel Corporation Bulk packaged material and methods of packaging and dispensing material
USD826055S1 (en) * 2016-06-01 2018-08-21 Louis Vuitton Malletier Packaging
US20210113978A1 (en) * 2019-10-19 2021-04-22 August Berger Metallwarenfabrik Gmbh Mixing vessel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9211633U1 (de) * 1992-08-29 1992-11-12 Van Leer Verpackungen GmbH, 5000 Köln Versandbehälter

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648882A (en) * 1970-03-02 1972-03-14 Exxon Research Engineering Co Package for highly viscous tacky materials
US3760971A (en) * 1970-03-23 1973-09-25 Marathon Oil Co Liquid cryogen storage tank for shore, ship or barge
US4339486A (en) * 1979-12-28 1982-07-13 Shin-Etsu Chemical Co., Ltd. Method for temporarily protecting sticky surface and a thus protected adhesive sheet material
US4759445A (en) * 1984-01-23 1988-07-26 Mcvay Malcolm S C Additive package for a method for compounding polymer formulations
US4930644A (en) * 1988-12-22 1990-06-05 Robbins Edward S Iii Thin film container with removable lid and related process
US5060816A (en) * 1988-12-22 1991-10-29 Robbins Edward S Iii Composite container and associated carrier
US5183152A (en) * 1990-09-04 1993-02-02 National Gypsum Company Humectants in joint compound containers
US5323588A (en) * 1990-09-04 1994-06-28 National Gypsum Company Method of packaging aqueous slurries
US5465863A (en) * 1993-03-10 1995-11-14 Greif Bros. Corporation Recyclable steel drum for hot flow products
US5503701A (en) * 1993-03-10 1996-04-02 Greif Bros. Corporation Method for providing recyclable steel drum for hot flow products
US5802815A (en) * 1994-02-14 1998-09-08 Henkel Kommanditgesellschaft Auf Aktien Process for the self-sealing of containers
US20120279892A1 (en) * 2008-03-18 2012-11-08 Henkel Corporation Bulk packaged material and methods of packaging and dispensing material
USD826055S1 (en) * 2016-06-01 2018-08-21 Louis Vuitton Malletier Packaging
US20210113978A1 (en) * 2019-10-19 2021-04-22 August Berger Metallwarenfabrik Gmbh Mixing vessel

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Publication number Publication date
DE1802609A1 (de) 1969-05-14

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