Our company has independently developed a next-generation SH‑301 acrylic cathodic electrophoretic coating, which is free of heavy metals such as lead, tin, cadmium, chromium, and mercury, and contains no tin—fully meeting environmental protection requirements and representing a major trend in the future development of eco‑friendly coatings. This product can be formulated into a wide range of vibrant colored electrophoretic paints by adding waterborne or solvent-based color pastes. It features the following characteristics:

The coating exhibits excellent leveling, resulting in a smooth, fine, and glossy finish.
High gloss, excellent transparency, and superior decorative appeal.
The bath solution exhibits excellent stability and can accommodate extended replenishment cycles.
It exhibits excellent resistance to shrinkage cavities and strong resistance to contamination in the plating bath.
Widely applicable to industries such as lighting, furniture and home furnishings, home appliances, hardware, and handicrafts.

II. Main Components

Matrix resin: copolymer acrylic resin

Curing agent: Blocked polyisocyanate

Neutralizing agent: organic acid

dissolve Agent: Alcohol ether type

Additives: surfactants, anti-cratering agents, and anti-yellowing agents.

Original paint performance Indicator

Project	Technical indicators	Inspection criteria
Appearance	Yellow viscous liquid	Visual estimation
Solid content ( 120℃ ，1h ), %	≥60	GB/T6751
pH value ( 25℃ )	5.0±0.2	pH meter
Electrical conductivity ( 25℃ ), μS/cm	800±300	HG/T3335
Storage stability ( 5-35℃ )	No obvious stratification.	Visual estimation

Note: For pH and conductivity measurements, dilute the resin with pure water at a ratio of 1:5.

IV. Slotting Ratios and Methods

Tank solution formulation ratio: resin : pure water =1:5 or 1:6

V. On-site Tank Solution Management Project

Excellent bath‑solution parameters and coating quality stem from rigorous on‑site process‑parameter control and equipment maintenance. Depending on their specific operating conditions, production lines may adopt different management procedures and specifications. The recommended application parameters are listed in the table below for reference.

Category	Project	Control indicator	Detection frequency
Electrophoresis tank	Proportioning	1:5 or 1:6	--
	Curing time, h	24	--
	Solid content ( 120℃ ，1h ), %	1 0±2	1 time/day
	pH value	4.8-5.2	1 time/day
	Electrical conductivity, μS/cm	800±300	1 time/day
	Tank solution temperature, °C	28±5	1 time/day
	Electrophoresis time, s	30-120	1 time/day
Drying oven	Set furnace temperature, °C	130–150	1 time/day
Curing conditions	Drying time ( 14 0± 10℃), min	20 (Coating Retention Time)	1 time/day

VI. Product Coating Performance Specifications

Project	Indicator	Inspection criteria
Appearance	Smooth and even, with no pinholes or sink marks.	Visual estimation
Pencil hardness, H, ≥	3	GB/T6739
Adhesion, grade	0	GB/T9286
Flexibility, mm	1	GB/T1731
Impact, Kg.cm	50	GB/T1732
Luster ( 60⁰ ), ≥	100	GB/T9754
Water resistance ( 40℃ ), h, ≥	120	GB/T1733
Drying performance test (≥5 0 times )	No abnormalities on the coating surface.	GB/T6753.2
Salt spray resistance (film thickness greater than 15) um) ,h,≥	72	GB/T1771

VII. Construction Equipment

The application of cathodic electrophoretic coatings is carried out in an electrophoresis tank; therefore, the following equipment is required:

Electrophoresis tanks (main tank, auxiliary tank, and spare tank) shall be smooth and even, free from defects such as pinholes and shrinkage cavities.

Circulation system (including filtration); DC power supply and associated power supply equipment

Pure water system; ultrafiltration system; cleaning system

Heat exchange unit; curing and drying unit

VIII. Storage, Packaging, and Transportation

Storage: It is recommended to store this product in a well-ventilated area at a low temperature (5°C–35°C), away from direct sunlight. The product’s shelf life is… Six months; if the product is retested beyond this period and still meets the standards, it may continue to be used.
Packaging: Standard packaging in 20L plastic drums; custom packaging can also be arranged upon request.
Transportation: This product is a water-based coating, non-flammable and non-explosive, and shall be stored and transported as a non-hazardous material. During transit, protect it from direct sunlight and avoid freezing (＞ 5℃) 。

SH-303 Acrylic Cathodic Electrophoretic Coating

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SH-303 Acrylic Cathodic Electrophoretic Coating

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