Partial plating method of automobile resin part and automobile resin part plated by using the same

Patent metadata

Field	Value
Publication number	US-10501859-B2
Application number	US-201615379128-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Oct 31, 2016
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

A partial plating method of an automobile resin part may include a painting step of partially applying masking paint for plating on one side surface of an injection molded automobile resin product to form a painting portion where the masking paint for plating is applied and a non-painting portion where the masking paint for plating is not applied, and a wet electroplating step of attaching a current electrode for wet electroplating on the non-painting portion and performing the wet electroplating to form a plating layer on the entire surface of the automobile resin part except for the painting portion.

First claim

What is claimed is:

1. A partial plating method of an automobile resin part, including:
a painting step of partially applying masking paint for plating on one side surface of an injection molded automobile resin product to form a painting portion where the masking paint for plating is applied and a non-painting portion where the masking paint for plating is not applied; and
a wet electroplating step of attaching a current electrode for wet electroplating on the non-painting portion and performing the wet electroplating to form a plating layer on an entire surface of the automobile resin part except for the painting portion,
wherein the masking paint for plating contains a masking resin composition for plating, the masking resin composition for plating contains a polymer resin, an organic solvent, a plasticizer, and an inorganic additive, and
wherein the polymer resin is a mixture of poly vinyl chloride (PVC) and an ethylene-vinyl acetate copolymer (EVA), and
wherein the plasticizer is trioctyl benzene-1,3,5-tricarboxylate, and
wherein the organic solvent includes methyl isobutyl ketone, toluene, n-butanol, and ethyl acetate, and
wherein the inorganic additive includes sodium (Na), aluminum (Al), potassium (K), calcium (Ca), titanium (Ti), and iron (Fe).

2. The partial plating method of the automobile resin part of claim 1 , wherein in the wet electroplating step, the wet electroplating is not performed on the painting portion.

3. The partial plating method of the automobile resin part of claim 1 , wherein in the painting step, the masking paint for plating is applied on a surface of the automobile resin part molded at a thickness of 20 to 30 μm.

4. The partial plating method of the automobile resin part of claim 1 , wherein the wet electroplating step includes a pre-treating step of activating chemical plating by adsorbing a metal catalyst so that the chemical plating is performed on a surface of the automobile resin part, a chemical plating step of forming a conductor configured for performing electroplating by using chemical nickel by the metal catalyst, and an electroplating step of plating the automobile resin part gone through the chemical plating step using copper (Cu), nickel (Ni), and chromium (Cr).

5. The partial plating method of the automobile resin part of claim 1 , wherein a concentration of the masking resin composition for plating is 60 wt % or more and 99 wt % or less in the masking paint for plating.

Assignees

• Hyundai Motor Co Ltd
• Samshin Chemical Co Ltd

Inventors

• Kim Hyun-Gyung
• Oh Woo-Taik

Classifications

• C23C28/028

  Including graded layers in composition or in physical properties, e.g. density, porosity, grain size · CPC title

• C23C18/32

  Coating with nickel, cobalt or mixtures thereof with phosphorus or boron (C23C18/50 takes precedence) · CPC title

• C25D5/022 Primary

  using masking means · CPC title

• C23C18/1879

  Use of metal, e.g. activation, sensitisation with noble metals · CPC title

• C23C18/2086

  with use of organic or inorganic compounds other than metals, first · CPC title