High viscosity blends and coatings of an ionomer and poly(vinyl alcohol)

A technology of ionomer and vinyl alcohol, applied in the field of blending compositions, can solve the problems of complex ionomer dispersion process and the like

Inactive Publication Date: 2014-11-05
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, the blend has the disadvantage of complex ionomer dispersion process

Method used

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  • High viscosity blends and coatings of an ionomer and poly(vinyl alcohol)
  • High viscosity blends and coatings of an ionomer and poly(vinyl alcohol)
  • High viscosity blends and coatings of an ionomer and poly(vinyl alcohol)

Examples

Experimental program
Comparison scheme
Effect test

example

[0176] Table 1 summarizes the ethylene-methacrylic acid dimers used to prepare the ionomers in Table 2 having the indicated weight % of methacrylic acid interpolymerized units based on the total acid copolymer. Ionomers were prepared from acid copolymers using standard conditions. Melt flow rate (MFR) was determined according to ASTM D1238 at 190°C using a 2160 g load; a similar test is ISO 1133.

[0177] Table 1

[0178]

[0179] ionomer

[0180] Table 2 summarizes the ionomers derived from ethylene methacrylic acid dimer, showing the percentage of carboxylic acid groups neutralized with sodium hydroxide to form the sodium salt or with potassium carbonate to form the potassium salt. Water dispersibility is determined according to the following method, which exemplifies the addition of unneutralized acid copolymers or ionomers to hot water. The process yields a mixture of water and a 10% solids loading by weight (weighed before adding to the water). Add 500 mL of di...

example 1-12 and comparative example C2-C19

[0185] These examples illustrate a method of mixing a preformed aqueous PVOH solution with a preformed aqueous ionomer dispersion. An 11.6 wt% aqueous dispersion of ION-8 was prepared by suspending the solid material in hot (90 to 95°C) water and stirring until all solid material disappeared. The ionomer dispersion is a translucent milky liquid.

[0186] Poly(vinyl alcohol) (PVOH) composition samples are available under the trade name Commercially available from DuPont. Aqueous solutions of the PVOH materials in Table 3 were prepared by suspending the solid material in cold water, then heating to 90 to 95°C with stirring until all solid material disappeared. The poly(vinyl alcohol) solution is a clear and transparent solution.

[0187] table 3

[0188]

[0189] Blends of aqueous ionomer dispersions and aqueous poly(vinyl alcohol) solutions were formulated by mixing them together at room temperature to produce the blend compositions summarized in Table 4. Specificall...

example 13

[0212] This example shows an embodiment where a solid ionomer composition is contacted with an aqueous solution of PVOH. Two grams of PVOH-6 were stirred in 180 grams of water at a temperature of 23°C. The resulting mixture was heated to a temperature of 39° C. within 13 minutes, forming a clear aqueous solution. Heating was continued until the solution reached a temperature of 96°C within 15 minutes, and 9 grams of ION-8 in the form of fused-cut pellets were added with stirring. Within 2 minutes, ION-8 had been completely dispersed in water, and an additional 9 grams of fused-cut pellets were added. ION-8 in pelletized form. Within 17 minutes all of the ION-8 added had been completely dispersed in the water and the heat was turned off.

[0213] The following examples demonstrate coated paperboard with aqueous dispersions. Aqueous ionomers were prepared by mixing 10% by weight of PVOH-6 in water with 10% by weight of ION-2 Thing-PVOH dispersion. Similarly, comparative exam...

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Abstract

Disclosed are compositions comprising a blend of a poly(vinyl alcohol) composition comprising a poly(vinyl alcohol) characterized by (i) a hydrolysis level from 85 to 93 mole % and a 4 weight % aqueous viscosity of 16 to 75 centipoise (cP); and an ionomer comprising a parent acid copolymer that comprises ethylene and 18 to 30 weight % of acrylic acid or methacrylic acid, the acid copolymer having a melt flow rate from 200 to 1000 g / 10 min., wherein 50% to 70% of the carboxylic acid groups of the copolymer are neutralized to carboxylic acid salts comprising potassium cations, sodium cations or combinations thereof. Articles and multilayer structures comprising the blend composition on a substrate and methods for their preparation are also disclosed.

Description

[0001] This patent application claims priority to US Patent Application Serial No. 13 / 407,896, filed February 29, 2012, and US Patent Application Serial No. 13 / 407,927, filed February 29, 2012. [0002] The present invention relates to compositions, aqueous dispersions and articles comprising ionomer-poly(vinyl alcohol) blends, methods of making them, and methods of forming coatings comprising said blends on substrates. Background technique [0003] Ionomers of ethylene copolymers with α,β-ethylenically unsaturated carboxylic acids are known in the art, wherein at least a portion of the carboxylic acid groups of the copolymer are neutralized to form an alkali metal, alkaline earth metal or transition metal containing Cationic carboxylate. See, eg, U.S. Patents 3,264,272; 3,338,739; 3,355,319; 5,155,157; ​​5,244,969; [0004] Aqueous dispersions of ionomers are also known in the art. See, eg, US Patents 3,896,065; 3,904,569; 4,136,069; 4,508,804; 5,409,765; and Japanese paten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C09D123/08C08L29/04
CPCC09D123/0876Y02P20/582C08L29/04C08L23/0876C09D129/04
Inventor E.伊奇特R.A.哈耶斯
Owner EI DU PONT DE NEMOURS & CO
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