Ionomer-poly(vinylalcohol) blends and coatings

A vinyl alcohol, ionomer technology, applied in coating, chemical recycling and other directions, can solve the problem of complex ionomer dispersion process

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 disclosed above, the blends have the disadvantage of complex ionomer dispersion process

Method used

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  • Ionomer-poly(vinylalcohol) blends and coatings
  • Ionomer-poly(vinylalcohol) blends and coatings
  • Ionomer-poly(vinylalcohol) blends and coatings

Examples

Experimental program
Comparison scheme
Effect test

example

[0188] 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 ISO1133.

[0189] Table 1

[0190]

[0191] ionomer

[0192] 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 was determined according to the following method, which shows the addition of unneutralized acid copolymer or ionomer 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 distilled ...

example 1-24 and comparative example C1-C7

[0213] The examples summarized in Tables 6 and 7 demonstrate coated paperboard with aqueous dispersions. Aqueous ionomer-PVOH dispersions were formulated according to the general procedure above. The substrate is 0.22 inch thick, nominally 77 lb basis weight, paperboard coated with clay on one side for printing, available under the trade name Bleached Boards were obtained commercially from Rock Tenn Converting Company (Demopolis AL). An 8 inch x 11 inch substrate sample was coated on the side opposite the clay coating by weighing the sample and then attaching it to a flat piece of plywood with a spring clip. Approximately 80 mL of the ionomer-PVOH dispersion prepared above was applied to the clamped end, and the dispersion was spread and smoothed in one stroke with a 0.0036 inch wire wound Meyer rod to cover the remainder of the paper sample. Excess dispersion is removed during the diffusion operation. Due to the difficulty of drying to constant weight, the dry coating we...

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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 of from 80 to 94 mole % and a 4 weight % aqueous viscosity of 15 centipoise (cP) or less; or (ii) a hydrolysis level of 95 mole % to 100 %; 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

technical field [0001] This patent application claims priority to US Patent Application Serial No. 13 / 407,829, filed February 29, 2012, and US Patent Application Serial No. 13 / 407,858, 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 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 US Patents 3,896,065; 3,904,569; 4,136,069; 4,508,804; 5,409,765; and Japan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/08C09D129/04C08L23/08C08L29/04
CPCC09D129/04C08L23/0876C09D123/0876C08L29/04Y02P20/582
Inventor E.伊奇特R.A.哈耶斯
Owner EI DU PONT DE NEMOURS & CO
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