IL27483A - Cellulose acetate-butyrate curtain coating compositions - Google Patents

Cellulose acetate-butyrate curtain coating compositions

Info

Publication number
IL27483A
IL27483A IL2748367A IL2748367A IL27483A IL 27483 A IL27483 A IL 27483A IL 2748367 A IL2748367 A IL 2748367A IL 2748367 A IL2748367 A IL 2748367A IL 27483 A IL27483 A IL 27483A
Authority
IL
Israel
Prior art keywords
coating
curtain
composition
substrate
cellulose acetate
Prior art date
Application number
IL2748367A
Original Assignee
Eastman Kodak 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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of IL27483A publication Critical patent/IL27483A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08Cellulose derivatives
    • C08L1/10Esters of organic acids, i.e. acylates

Description

Cellulose acetate curtain coatin compositions EASTMAN KODAK 2 This invention consists in compositions comprising to by weight of cellulose ate and 10 to weight of one or more of triethyl ethyl and isodecyl and having a hot melt viscosity at of to centipoises and a melt stability of at least hour at and By is meant the time during which the molten composition can be without suffering any substantial the extrusion conditions of at least and She invention also consists in a process of coating a substrate with a composition as defined which comprises heating the composition to a hot melt coating consistency at a temperature of at least and a pressure of at least extruding the resulting molten composition through a narrow extrusion orifice to produce a falling curtain of molten depositing the curtain on a substrate having relative movement so as to form a coating and cooling the coating on the substrate to solidify The substrate will normally support at least one article which will be packaged by this curtain coating Curtain coating processes of this kind are further described in patent application Plastisized cellulose esters use in coating 3 are but all such compositions relate to surface not curtain All of them have much lower melt viscosities than the coating composition used in the present which is the first really suitable material for use in curtain coating because of its good adhesion the its high melt and its very suitable melt Cellulose acetate butyrate is a lose ester which is prepared by known procedures involving the esterification of cellulose by selected acidic The final products for use in the present compositions preferably contain not more than about by weight of free hydroxy1 and have a viscosity of about to 30 The combined butyryl content of cellulose acetate butyrate is preferably at least about by The plasticizer which forms part of the composition of this invention may be any of those mentioned above which are all compatible with cellulose acetate butyrate to be In these plasticizers should preferably have a boiling point of at least preferably higher than at atmospheric a flash point of at least by the Cleveland Open Cup a low vapour and 4 substantially no offensive The amount of which should be employed for each composition will vary to some extent with the type of plasticizer Stabilizers be added to the 5 desirable and useful agents include the such as neopentyl glycol and low molecular weight vinyl acetate The concentration of agents is preferably at least equal to that of the plasticizer for there to be any noticeable improvement in the adhesion of the composition to the particular substrate The compositions of invention are designed to employed extrusion machines at temperatures about to about and at a pressure of 25 to the compositions are employed at temperatures higher than about prolonged periods of the molten plastic tends to as indicated by a darkening in the colour of the molten a drop in its melt and a decrease in the low temperature properties of the extruded If the composition ia maintained in the extrusion device at a temperature the life of the molten composition in the machine would fall from acceptable level of to 2 hours to about to of an At these elevated temperatures above the stability of the molten composition is not sufficient to be employed successfully in the curtain coating the rate of loss of plasticizer from the becomes a limiting TypicaJL conditions for a preferred process are and Another consideration which relates to the properties of the composition of this invention is its melt The unplasticized resin has a melt 7 curtain coating Parts and percentages are by weight unless otherwise Sable I indicates various types of cellulose butyrate which can be used in the compositions tested in the The viscosity of the cellulose ester was determined in accordance with Test Method D I lumber of plastic Weight per unit of fiscosity Material Butyryl 38 1 20 1 2 50 0 5 50 0 1 In Sable ΣΪ are shown different compositions which were prepared eiaploying some of the materials described in Sable and incorporating various other components in the preparation of the She plasticlsers are identified by It is for reasons explained to include about to 5 parts of a stabilizer and about 1 to 100 parts per million of a strength and elongation were determined by standard on a Tensile with the tensile samples being pulled at a rate of per minute a 20 or a 50 low temperature brittleness was determined by placing film strips in a Scott Brittleness Tester containing and dry and subjecting the film strips to a right angle bend at various temperatures of the specimens Melt viscosity of the composition was determined in accordance with ASTM Test Method D with the extrusion being controlled at having an orifice size of and having the total weight of the piston and its load grama Preferred compositions according to the invention have tensile strengths of from 3400 to 2500 psi and low temperature brittleness of to II Parts Tensile plastic Parts Strength material Plastieizer psi 53 19 adipate 47 2300 15 2 100 18 2500 adipate insufficientOCRQuality

Claims (1)

  1. CLAIMS compositions comprising 70 to by weight of cellulose and to by weight of one or more of and and having a hot melt viscosity at of to poises and a melt stability of at least hour at and Compositions according to Claim comprising in addition extender fillers if adhesion promoting Compositions according to Claims 1 or substantially as described herein with reference to A process of coating a comprises heating the composition to a hot melt coating consistency at a temperature of not below and a pressure of at least extruding the resulting molten composition through a narrow extrusion to produce lling curtain of the molten depositing the curtain on a substrate having relative movement so as to a coating on the and cooling the coating on the substrate to solidify 11 A process according to Claim applied to the manufacture of a sealed wherein the curtain of the molten composition is deposited on a substrate an article of insufficientOCRQuality
IL2748367A 1966-03-14 1967-02-24 Cellulose acetate-butyrate curtain coating compositions IL27483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53384166A 1966-03-14 1966-03-14

Publications (1)

Publication Number Publication Date
IL27483A true IL27483A (en) 1971-08-25

Family

ID=24127649

Family Applications (1)

Application Number Title Priority Date Filing Date
IL2748367A IL27483A (en) 1966-03-14 1967-02-24 Cellulose acetate-butyrate curtain coating compositions

Country Status (6)

Country Link
CH (1) CH471839A (en)
GB (1) GB1178621A (en)
IL (1) IL27483A (en)
MY (1) MY7200002A (en)
NL (1) NL6703823A (en)
SE (1) SE334563B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607626A1 (en) * 1986-03-07 1987-09-10 Bayer Ag CELLULOSE ESTER MOLDS WITH IMPROVED TOUGHNESS
US5219510A (en) * 1990-09-26 1993-06-15 Eastman Kodak Company Method of manufacture of cellulose ester film
US7078075B1 (en) 1995-02-23 2006-07-18 H.B. Fuller Licensing & Financing Inc. Method for producing a continuous thermoplastic coating and articles constructed therefrom
DE19753266B4 (en) 1997-12-01 2010-10-07 H.B. Fuller Licensing & Financing, Inc., St. Paul Method for connecting airtight materials

Also Published As

Publication number Publication date
CH471839A (en) 1969-04-30
SE334563B (en) 1971-04-26
MY7200002A (en) 1972-12-31
NL6703823A (en) 1967-09-15
GB1178621A (en) 1970-01-21

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