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Gas barrier compositions having improved barrier properties

A technology of gas barrier and composition, applied in the direction of flexible covering, transportation and packaging, packaging, etc., which can solve the problems of low gas barrier performance and so on

Inactive Publication Date: 2005-04-20
PPG PACKAGING COATINGS SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the amount of polyamine in the composition, while achieving improved chemical resistance, also results in packaging materials with low gas barrier properties

Method used

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  • Gas barrier compositions having improved barrier properties
  • Gas barrier compositions having improved barrier properties
  • Gas barrier compositions having improved barrier properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1 describes the preparation of ungelled Mannich base adducts which can be advantageously used as hydroxy-substituted aromatic compound (C) in the gas barrier coating composition of the invention.

[0082] Examples A to V describe the preparation of thermosetting gas barrier coating compositions. Examples A through N were cured at 180°F (82.5°C) and Examples 0 through V were cured at 145°F (62.8°C). Comparative Examples A and O contained no hydroxy-substituted compound.

Embodiment 2

[0083] Example 2 describes the preparation of thermoplastic ungelled amine-epoxide adducts for subsequent use in thermoplastic gas barrier coatings as the preformed reaction product of polyamine component (A) and polyepoxide component (B) composition. Example 2A describes a comparative thermoplastic gas barrier coating composition containing only the adduct of Example 2 without the hydroxy-substituted aromatic compound. Example 2 describes the preparation of a thermoplastic gas barrier coating composition according to the invention containing 5% by weight of resorcinol as hydroxy-substituted aromatic compound (C).

[0084] Example 1

[0085] This example describes the preparation of ungelled Mannich base adducts useful as hydroxy-substituted aromatic compounds (C) in the gas barrier coating compositions of the present invention.

[0086] 1 mol (110 g) of resorcinol, 1 mol (136 g) of m-xylylenediamine and 533 g of 1-methyl-2-pyrrolidone were charged into a suitably equipped r...

Embodiment A to W

[0088] Preparation of thermosetting gas barrier coating compositions

[0089] By mixing 17.2 wt% GASKAMINE® 328S (the reaction product of m-xylylenediamine and epichlorohydrin, purchased from Mitsubishi Gas Chemical. Co., in 1-methoxy-2-propanol (under the trade name DOWANOL® PM available from Dow Chemical Co.), 70% solution in), 25.7 wt% TETRAD-X® (polyglycidyl m-xylylenediamine, available from Mitsubishi Gas Chemical. Co., in ethyl acetate 65% solution), 57.0 wt% 1-methoxy-2-propanol and 0.1 wt% SF1023 (siloxane surfactant, purchased from General Electric Co.) were mixed to prepare the gas barrier coating combinations of Examples A to V things.

[0090] To the gas barrier compositions of Examples B to O and P to V were added the additives (as component (C)) in the given amounts listed in Table 1 below. The compositions of Comparative Examples A and P contained no additives. The gas barrier coating compositions of Examples A through V had a final solids content (based on t...

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Abstract

Gas barrier coating compositions are provided comprising a polyamine component, a polyepoxide component, and a hydroxy-substituted aromatic compound present in an amount sufficient to provide an A gas barrier coating of 75% of the oxygen permeability of the same composition of hydroxy-substituted aromatic compounds. Also provided is a multilayer packaging material having at least one layer of gas permeable packaging material and at least one layer of gas barrier material formed from the gas barrier coating composition. Also available in airtight container.

Description

field of invention [0001] The present invention relates to gas barrier coating compositions for polymeric packaging materials and multilayer packaging materials prepared therefrom. Background of the invention [0002] Plastics are increasingly being used as an alternative to glass and metal packaging materials. Advantages of plastic packaging materials over glass packaging materials include light weight, low breakage and low cost. Unlike metal packaging materials, plastic packaging materials can be used to form reclosable containers. However, common plastic packaging materials such as polyesters, polyolefins, and polycarbonates tend to be permeable to gases and problem appear. [0003] The degree to which oxygen is permeable to a particular plastic packaging material is usually expressed as the oxygen permeability constant. The oxygen permeability constant (hereinafter referred to as "P(O 2 )”), usually in cm 3 -mil / 100in 2 / atm / day means. Specifically, this is for p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/56C08J7/04C09D163/00B65D65/42C08G59/50C08G59/62C08J7/043C08J7/048
CPCC08G59/56C08G59/62C08J2463/00Y10T428/139Y10T428/1334Y10T428/31725Y10T428/31786Y10T428/31511Y10T428/31855Y10T428/31938C08J7/0427C08J7/048C08J7/043
Inventor L·H·卡尔布鲁姆C·库驰科K·W·尼德斯特
Owner PPG PACKAGING COATINGS SUZHOU
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