# US 2019/0313635 A1 · Method for preparing cut flower water retention agent, cut flower water retention agent prepared thereby, and cut flower container for accommodating same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0313635 A1
- Document ID: US20190313635A1
- Status: Published application
- Kind: A1
- Application number: 16/347,645
- Filed: 2017-11-01
- Published: 2019-10-17
- Earliest claimed: 2016-11-07
- Inventors: Seung Yeon LEE
- Web page: https://patentgrep.com/patent/US20190313635A1

## CPC

- A01N 3/02: Keeping cut flowers fresh chemically
- B65B 25/023: {Packaging flower bouquets}
- B65B 55/22: Immersing contents in protective liquids
- B65D 81/24: Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants (with thermal insulation B65D81/38)
- B65D 81/3266: {separated by a common rupturable seal, a clip or other removable fastening device}
- B65D 85/505: {for cut flowers}
- A01G 5/06: Devices for preserving flowers
- B65B 5/067: {in bags (B65B5/061 - B65B5/065 take precedence)}
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- B65B: MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING (bundling and pressing devices for cigars A24C1/44; devices for tensioning and securing binders adapted to be supported by the article or articles to be bound B25B25/00; applying closure members to bottles, jars or similar containers B67B1/00-B67B6/00; concurrent cleaning, filling and closing of bottles B67C7/00; emptying bottles, jars, cans, casks, barrels or similar containers B67C9/00)
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)

## Abstract

The present invention relates to: a method for preparing a cut flower water retention agent; a cut flower water retention agent prepared thereby; and a cut flower container for accommodating the same, and the cut flower water retention agent can supply water and nutrients so as to maintain freshness for a long time without the wilting of cut flowers during the distribution and storage of the cut flowers, and is prepared to be superabsorbent so as to be used by being mixed with water, thereby having convenient use, enabling cut flowers to be safely transported and carried, and enabling a decrease in the commodity value of cut flowers to be prevented during the distribution thereof by extending the lifespan of the cut flowers.

## Claims

### Claim 1

A method for preparation of a water retention agent for cut flowers, comprising:
preparing a mixed solution by mixing a water-soluble ethylenically unsaturated monomer, a hydrophilic additive and a crosslinking agent in a predetermined ratio by weight (S100);
adding a predetermined amount of water to the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent and then stirring the mixed solution (S200);
adding a polymerization initiator to the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent, which was obtained after the water addition and stirring process, in order to form a polymer (S300);
after drying the polymer, pulverizing the dried polymer to prepare absorbent polymer powder (S400);
preparing an additive to be mixed with the absorbent polymer powder in order to supply nutrients to cut flowers (S500); and
mixing the absorbent polymer powder and the additive to prepare a water retention agent (S600).

### Claim 2 (depends on 1)

The method according to claim 1, wherein the water-soluble ethylenically unsaturated monomer used in the mixed solution preparation process (S100) is any one or more selected from a group consisting of: anionic monomers of methacrylic acid, maleic anhydride, crotonic acid, itaconic acid, 2-acryloylethane sulfonic acid, 2-methacryloylethane sulfonic acid, 2-methacryloylpropane sulfonic acid or 2-methacrylamide-2-methyl propane sulfonic acid and salts thereof; and methacrylamide, N-substituted methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate and methoxypolyethyleneglycol methacrylate,
the hydrophilic additive is any one or more selected from a group consisting of sodium dodecyl sulfate, phosphate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate and sorbitan monooleate,
the crosslinking agent is any one or more selected from a group consisting of N,N′-methylene bismethacrylate, ethylene oxymethacrylate, polyethylene oxymethacrylate, propylene oxymethacrylate, glycerin diacrylate, glycerin triacrylate, trimethylol triacrylate, triallylamine, triaryl cyanurate, triallyl isocyanate, polyethylene glycol, diethylene glycol and propylene glycol,
wherein, among a total content of the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent, the water-soluble ethylenically unsaturated monomer is included in an amount of 30 to 60 parts by weight (‘wt. parts’), the hydrophilic additive is included in an amount of 5 to 20 wt. parts, and the crosslinking agent is included in an amount of 1 to 5 wt. parts,
wherein, in the water addition and stirring process (S200), the water is added in an amount of 40 to 100 wt. parts to total 100 wt. parts of the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent,
wherein the polymerization initiator is included in an amount of 0.5 to 3 wt. parts to 100 wt. parts of the water-soluble ethylenically unsaturated monomer, and wherein, in the polymer drying and pulverization process (S400), the polymer is dried at a temperature of 80 to 110° C., and the absorbent polymer powder formed by pulverizing the dried polymer has a particle diameter of 100 to 500 μm.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the additive in the additive preparation process (S500) is prepared by blending sugar, fungicide, an ethylene inhibitor, a growth regulator and organic acid and, in terms of a mixing ratio by weight, the additive is prepared by blending 200 to 300 wt. parts of sugar, 0.5 to 2.0 wt. parts of fungicide, 1 to 3 wt. parts of an ethylene inhibitor, 0.5 to 1.5 wt. parts of a growth regulator and 5 to 10 wt. parts of organic acid,
wherein the sugar is any one or more selected from a group consisting of glucose, fructose and sucrose, the fungicide is any one or more selected from a group consisting of 8-hydroxyquinoline sulfate (8-HQS), 8-hydroxyquinoline citrate (8-HQC), chlorine, aluminum sulfate and sodium hypochlorite (NaClO), the ethylene inhibitor is silver thiosulfate (STS), the growth regulator is any one or more selected from magnesium nitrate and calcium chloride, and the organic acid is any one or more selected from citric acid and ascorbic acid, wherein the additive prepared with addition of the organic acid has pH in the range of 3.0 to 3.5, and
wherein the water retention agent in the additive mixing process (S600) is prepared by mixing the absorbent polymer powder and the additive in a weight ratio of 9:1 to 6:4.

### Claim 4

(canceled)

### Claim 5

A cut flower container for accommodating a water retention agent, comprising an inner case that accommodates the water retention agent and is used by dipping the cut flowers in the water retention agent swollen by water present in the inner case and mixed with the water retention agent,
wherein the inner case has a perforated line on a top portion to open the inner case and a fixing tether under the perforated line,
wherein the water retention agent is prepared by a method including:
preparing a mixed solution by mixing a water-soluble ethylenically unsaturated monomer, a hydrophilic additive and a crosslinking agent in a predetermined ratio by weight (S100);
adding a predetermined amount of water to the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent and then stirring the mixed solution (S200);
adding a polymerization initiator to the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent, which was obtained after the water addition and stirring process, in order to form a polymer (S300);
after drying the polymer, pulverizing the dried polymer to prepare absorbent polymer powder (S400);
preparing an additive to be mixed with the absorbent polymer powder in order to supply nutrients to cut flowers (S500); and
mixing the absorbent polymer powder and the additive to prepare a water retention agent (S600),
wherein the water-soluble ethylenically unsaturated monomer used in the mixed solution preparation process (S100) is any one or more selected from a group consisting of: anionic monomers of methacrylic acid, maleic anhydride, crotonic acid, itaconic acid, 2-acryloylethane sulfonic acid, 2-methacryloylethane sulfonic acid, 2-methacryloylpropane sulfonic acid or 2-methacrylamide-2-methyl propane sulfonic acid and salts thereof; and methacrylamide, N-substituted methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate and methoxypolyethyleneglycol methacrylate,
the hydrophilic additive is any one or more selected from a group consisting of sodium dodecyl sulfate, phosphate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate and sorbitan monooleate,
the crosslinking agent is any one or more selected from a group consisting of N,N′-methylene bismethacrylate, ethylene oxymethacrylate, polyethylene oxymethacrylate, propylene oxymethacrylate, glycerin diacrylate, glycerin triacrylate, trimethylol triacrylate, triallylamine, triaryl cyanurate, triallyl isocyanate, polyethylene glycol, diethylene glycol and propylene glycol,
wherein, among a total content of the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent, the water-soluble ethylenically unsaturated monomer is included in an amount of 30 to 60 wt. parts, the hydrophilic additive is included in an amount of 5 to 20 wt. parts, and the crosslinking agent is included in an amount of 1 to 5 wt, parts,
wherein, in the water addition and stirring process (S200), the water is added in an amount of 40 to 100 wt. parts to total 100 wt. parts of the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent,
wherein the polymerization initiator is included in an amount of 0.5 to 3 wt. parts to 100 wt. parts of the water-soluble ethylenically unsaturated monomer, and
wherein, in the polymer drying and pulverization process (S400), the polymer is dried at a temperature of 80 to 110° C., and the absorbent polymer powder formed by pulverizing the dried polymer has a particle diameter of 100 to 500 μm,
wherein the additive in the additive preparation process (S500) is prepared by blending sugar, fungicide, an ethylene inhibitor, a growth regulator and organic acid and, in terms of a mixing ratio by weight, the additive is prepared by blending 200 to 300 wt. parts of sugar, 0.5 to 2.0 wt. parts of fungicide, 1 to 3 wt. parts of an ethylene inhibitor, 0.5 to 1.5 wt. parts of a growth regulator and 5 to 10 wt. parts of organic acid,
wherein the sugar is any one or more selected from a group consisting of glucose, fructose and sucrose, the fungicide is any one or more selected from a group consisting of 8-hydroxyquinoline sulfate (8-HQS), 8-hydroxyquinoline citrate (8-HQC), chlorine, aluminum sulfate and sodium hypochlorite (NaClO), the ethylene inhibitor is silver thiosulfate (STS), the growth regulator is any one or more selected from magnesium nitrate and calcium chloride, and the organic acid is any one or more selected from citric acid and ascorbic acid, wherein the additive prepared with addition of the organic acid has pH in the range of 3.0 to 3.5, and
wherein the water retention agent in the additive mixing process (S600) is prepared by mixing the absorbent polymer powder and the additive in a weight ratio of 9:1 to 6:4.

### Claim 6

A water retention agent for cut flowers prepared by:
preparing a mixed solution by mixing a water-soluble ethylenically unsaturated monomer, a hydrophilic additive and a crosslinking agent in a predetermined ratio by weight (S100);
adding a predetermined amount of water to the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent and then stirring the mixed solution (S200);
adding a polymerization initiator to the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent, which was obtained after the water addition and stirring process, in order to form a polymer (S300);
after drying the polymer, pulverizing the dried polymer to prepare absorbent polymer powder (S400);
preparing an additive to be mixed with the absorbent polymer powder in order to supply nutrients to cut flowers (S500); and
mixing the absorbent polymer powder and the additive to prepare a water retention agent (S600).

### Claim 7 (depends on 1)

The water retention agent for cut flowers according to claim 1, wherein the water-soluble ethylenically unsaturated monomer used in the mixed solution preparation process (S100) is any one or more selected from a group consisting of: anionic monomers of methacrylic acid, maleic anhydride, crotonic acid, itaconic acid, 2-acryloylethane sulfonic acid, 2-methacryloylethane sulfonic acid, 2-methacryloylpropane sulfonic acid or 2-methacrylamide-2-methyl propane sulfonic acid and salts thereof; and methacrylamide, N-substituted methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate and methoxypolyethyleneglycol methacrylate,
the hydrophilic additive is any one or more selected from a group consisting of sodium dodecyl sulfate, phosphate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate and sorbitan monooleate,
the crosslinking agent is any one or more selected from a group consisting of N,N′-methylene bismethacrylate, ethylene oxymethacrylate, polyethylene oxymethacrylate, propylene oxymethacrylate, glycerin diacrylate, glycerin triacrylate, trimethylol triacrylate, triallylamine, triaryl cyanurate, triallyl isocyanate, polyethylene glycol, diethylene glycol and propylene glycol,
wherein, among a total content of the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent, the water-soluble ethylenically unsaturated monomer is included in an amount of 30 to 60 parts by weight (‘wt. parts’), the hydrophilic additive is included in an amount of 5 to 20 wt. parts, and the crosslinking agent is included in an amount of 1 to 5 wt. parts,
wherein, in the water addition and stirring process (S200), the water is added in an amount of 40 to 100 wt. parts to total 100 wt. parts of the mixed solution including the water-soluble ethylenically unsaturated monomer, the hydrophilic additive and the crosslinking agent,
wherein the polymerization initiator is included in an amount of 0.5 to 3 wt. parts to 100 wt. parts of the water-soluble ethylenically unsaturated monomer, and wherein, in the polymer drying and pulverization process (S400), the polymer is dried at a temperature of 80 to 110° C., and the absorbent polymer powder formed by pulverizing the dried polymer has a particle diameter of 100 to 500 μm.

### Claim 8 (depends on 1)

The water retention agent for cut flowers according to claim 1, wherein the additive in the additive preparation process (S500) is prepared by blending sugar, fungicide, an ethylene inhibitor, a growth regulator and organic acid and, in terms of a mixing ratio by weight, the additive is prepared by blending 200 to 300 wt. parts of sugar, 0.5 to 2.0 wt. parts of fungicide, 1 to 3 wt. parts of an ethylene inhibitor, 0.5 to 1.5 wt. parts of a growth regulator and 5 to 10 wt. parts of organic acid,
wherein the sugar is any one or more selected from a group consisting of glucose, fructose and sucrose, the fungicide is any one or more selected from a group consisting of 8-hydroxyquinoline sulfate (8-HQS), 8-hydroxyquinoline citrate (8-HQC), chlorine, aluminum sulfate and sodium hydrochlorite (NaClO), the ethylene inhibitor is silver thiosulfate (STS), the growth regulator is any one or more selected from magnesium nitrate and calcium chloride, and the organic acid is any one or more selected from citric acid and ascorbic acid, wherein the additive prepared with addition of the organic acid has pH in the range of 3.0 to 3.5, and
wherein the water retention agent in the additive mixing process (S600) is prepared by mixing the absorbent polymer powder and the additive in a weight ratio of 9:1 to 6:4.