# US 10,370,512 B2 · Process for preparing coated ABS sheet

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- Number: US 10,370,512 B2
- Document ID: US10370512B2
- Status: Granted
- Kind: B2
- Application number: 15/910,623
- Filed: 2018-03-02
- Published: 2018-07-05
- Granted: 2019-08-06
- Earliest claimed: 2014-12-30
- Assignees: Hyundai Motor Company; Kia Motors Corporation; Gwngju Institute of Science and Technology
- Applicants: Hyundai Motor Company; Kia Motors Corporation; Gwangju Institute of Science and Technology
- Inventors: Eun Ju Noh; Min Hee Lee; Hey Jeong Lee; Jeong Hun Kwak; Wan Sik Kim; Ji Young Jo; Hyeon Jun Lee
- Web page: https://patentgrep.com/patent/US10370512B2

## CPC

- C08J 7/042: {with two or more layers, where at least one layer of a composition contains a polymer binder}
- B05D 3/002: {Pretreatement}
- B05D 3/107: {Post-treatment of applied coatings}
- B05D 7/02: to macromolecular substances, e.g. rubber (treatment or coating of shaped articles made of macromolecular substances C08J7/00)
- B05D 7/04: to surfaces of films or sheets (producing layered products by applying coatings of pasty or pulverulent plastics B29C41/00)
- C08J 7/056: Forming hydrophilic coatings
- B05D 1/005: {Spin coating}
- B05D 7/52: {Two layers}
- B05D 2201/00: Polymeric substrate or laminate
- B05D 2506/10: Fluorinated polymers
- B05D 2518/00: Other type of polymers
- C08J 2355/02: Acrylonitrile-Butadiene-Styrene [ABS] polymers
- C08J 2425/18: Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
- C08J 2427/16: Homopolymers or copolymers of vinylidene fluoride
- C08J 2465/00: Characterised by the use of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08J2407/00 - C08J2457/00, C08J2461/00 take precedence); Derivatives of such polymers
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)

## Abstract

A method of preparing an acrylonitrile butadiene styrene (ABS) sheet includes: a first step of hydrophilizing the surface of an ABS substrate by coating a surfactant solution on the substrate; a second step of washing the surfactant-coated ABS substrate with distilled water and drying the surfactant-coated ABS substrate; a third step of forming an intermediate film by coating poly(3,4-ethylenedioxythiophen)-polystyrene sulfonate (PEDOT-PSS) on top of the dried ABS substrate; and a fourth step of coating a fluorinated polymer solution of poly(vinylidene fluoride-trifluoroethylene) on top of the intermediate film.

## Claims

### Claim 1

A method of preparing an acrylonitrile butadiene styrene (ABS) sheet, the method comprising:
a first step of hydrophilizing the surface of an ABS substrate by coating a surfactant solution on the substrate;
a second step of washing the surfactant-coated ABS substrate with distilled water and drying the surfactant-coated ABS substrate;
a third step of forming an intermediate film by coating poly(3,4-ethylenedioxythiophen)-polystyrene sulfonate (PEDOT-PSS) on top of the dried ABS substrate; and
a fourth step of coating a fluorinated polymer solution of poly(vinylidene fluoride-trifluoroethylene) on top of the intermediate film.

### Claim 2 (depends on 1)

The method of claim 1, wherein the surfactant solution is an aqueous sodium dodecyl sulfate solution.

### Claim 3 (depends on 1)

The method of claim 1, wherein the drying is conducted at a temperature range of 40 to 60° C.

### Claim 4 (depends on 1)

The method of claim 1, wherein a concentration of the fluorinated polymer solution is 1 to 8 wt %, and in the fourth step, the coating is conducted at a coating rate of 1500 to 4500 rpm.

### Claim 5 (depends on 1)

The method of claim 1, wherein the concentration of the fluorinated polymer solution is 2 to 5 wt %, and in the fourth step, the coating is conducted at a coating rate of 3000 to 4500 rpm.