# US 11,992,812 B2 · Composition for polyamide interfacial polymerization, and method for manufacturing water treatment separation membrane by using same

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- Number: US 11,992,812 B2
- Document ID: US11992812B2
- Status: Granted
- Kind: B2
- Application number: 16/978,320
- Filed: 2019-06-14
- Published: 2021-01-07
- Granted: 2024-05-28
- Earliest claimed: 2018-06-15
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Lakwon Choi; Youngju Lee; Eunkyoung Byun; Chong Kyu Shin
- Web page: https://patentgrep.com/patent/US11992812B2

## CPC

- B01D 69/1251: {by interfacial polymerisation}
- C08G 69/28: Preparatory processes
- B01D 69/1071: {Woven, non-woven or net mesh}
- B01D 71/56: Polyamides, e.g. polyester-amides
- C02F 1/44: by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)}
- C08G 69/04: Preparatory processes
- C08G 69/44: Polyester-amides
- C08K 5/17: Amines; Quaternary ammonium compounds
- Y02A 20/131: Reverse-osmosis
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

Provided is a composition for interfacially polymerizing polyamide including an amine compound and a chain-type-structured additive containing one or more amino groups and two or more hydroxyl groups, and a method for manufacturing a water treatment separation membrane, and a water treatment separation membrane using the same.

## Claims

### Claim 1

An aqueous solution composition for interfacially polymerizing polyamide, comprising:
an amine compound in an amount from 0.001 wt % to 10 wt % based on 100 wt % of the composition;
a chain-type-structured additive containing one or more amino groups and two or more hydroxyl groups each separately bonded to a carbon atom in an amount from 0.01 wt % to 1 wt % based on 100 wt % of the composition;
a surfactant in an amount from 0.005 wt % to 0.5 wt % based on 100 wt % of the composition; and
water.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the chain-type-structured additive is one of the following Chemical Formula 1 or 2:
wherein:
m and n1 to n3 are each an integer selected from 1 to 10; and
X1 to X3 are each independently a hydroxyl group or an alkyl group, and at least two of X1 to X3 are a hydroxyl group.

### Claim 3 (depends on 2)

The composition of claim 2, wherein X1 to X3 are each a hydroxyl group.

### Claim 4 (depends on 1)

The composition of claim 1, wherein the chain-type-structured additive is one or more types selected from among D-glucamine and tris(hydroxymethyl)aminomethane.

### Claim 5 (depends on 1)

The composition of claim 1, wherein the surfactant comprises one or more chemicals selected from among sodium lauryl sulphate (SLS), an alkyl ether sulphate, an alkyl sulphate, an olefin sulfonate, an alkyl ether carboxylate, a sulfosuccinate, an aromatic sulfonate, an octylphenol ethoxylate, an ethoxylated nonylphenol, an alkyl poly(ethylene oxide), a copolymer of poly(ethylene oxide) and poly(propylene oxide), an alkyl polyglucoside, cetyl alcohol, oleyl alcohol, cocamide MEA, cocamide DEA, alkyl hydroxyethyldimethyl-ammonium chloride, cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, hexadecyltrimethylammonium bromide, hexadecyltrimethylammonium chloride, and an alkyl betaine.

### Claim 6 (depends on 1)

A method for manufacturing a water-treatment membrane, the method comprising:
preparing a porous support; and
forming a polyamide active layer on the porous support by interfacially polymerizing the composition of claim 1 and an acyl halide compound.