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1. WO2020109401 - METHOD FOR FORMING A PVOH BASED BARRIER LAYER ON A SUBSTRATE

Publication Number WO/2020/109401
Publication Date 04.06.2020
International Application No. PCT/EP2019/082769
International Filing Date 27.11.2019
IPC
C08L 27/12 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
27Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
02not modified by chemical after-treatment
12containing fluorine atoms
C08J 5/00 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5Manufacture of articles or shaped materials containing macromolecular substances
CPC
B32B 27/30
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products comprising ; a layer of; synthetic resin
30comprising vinyl ; (co)polymers; comprising acrylic (co)polymers
C08J 5/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
5Manufacture of articles or shaped materials containing macromolecular substances
C08L 27/12
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
27Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
02not modified by chemical after-treatment
12containing fluorine atoms
C09D 129/04
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
129Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
02Homopolymers or copolymers of unsaturated alcohols
04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
Applicants
  • BILLERUDKORSNÄS AB [SE]/[SE]
Inventors
  • NADERI, Ali
  • LARSSON, Johan
Agents
  • KRANSELL & WENNBORG KB
Priority Data
18208433.527.11.2018EP
18208434.327.11.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR FORMING A PVOH BASED BARRIER LAYER ON A SUBSTRATE
(FR) PROCÉDÉ DE FORMATION D'UNE COUCHE FORMANT BARRIÈRE À BASE DE PVOH SUR UN SUBSTRAT
Abstract
(EN)
There is provided a method for the production of a packaging material comprising a substrate and a gas barrier layer based on polyvinyl alcohol (PVOH), said method comprising the steps of -applying a coating composition of said PVOH dissolved in a first solvent onto said substrate to form a coating -subjecting the coating to a first drying step to form a dried PVOH-based coating on said substrate, -contacting the dried PVOH-based coating with a crosslinking solution comprising a crosslinking agent in a second solvent, to effect crosslinking of the PVOH-based coating, and -subsequent to the contact with the crosslinking solution, subjecting the PVOH- based coating to a second drying step, forming the PVOH-based barrier layer on said substrate, with the proviso that if the crosslinking solution comprises PVOH, the amount of PVOH added by the crosslinking solution is less than 20% (by weight), such as less than 10% (by weight), of the amount of PVOH added by the coating composition.
(FR)
L'invention concerne un procédé de production d'un matériau d'emballage comprenant un substrat et une couche formant barrière aux gaz à base d'alcool polyvinylique (PVOH), ledit procédé comprenant les étapes suivantes - application d'une composition de revêtement dudit PVOH dissous dans un premier solvant sur ledit substrat pour former un revêtement ; -soumission du revêtement à une première étape de séchage pour former un revêtement à base de PVOH sec sur ledit substrat , - mise en contact du revêtement à base de PVOH sec avec une solution de réticulation comprenant un agent de réticulation dans un second solvant, pour effectuer la réticulation du revêtement à base de PVOH, et - après le contact avec la solution de réticulation, soumission ultérieure du revêtement à base de PVOH à une seconde étape de séchage, formation de la couche formant barrière à base de PVOH sur ledit substrat, à condition que si la solution de réticulation comprend du PVOH, la quantité de PVOH ajoutée par la solution de réticulation soit inférieure à 20 % (en poids), par exemple inférieure à 10 % (en poids), de la quantité de PVOH ajoutée par la composition de revêtement.
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