Serial Number

Item

Index

Test Method

1.1

State in Container

Viscous liquid, no obvious lumps

Visual Inspection

1.2

Original paint fineness, um

≤45

GB/T1723-1979

1.3

Non-volatile content,

%(105±2)℃/2h/approx. 2g

≥65

GB/T1725-2007

1.4

Storage stability (5～30℃) 1 year

No obvious changes

GB6753.3-1986

Serial Number

Item

Index

2.1

Paint film baking conditions

70-80℃×30min or air dry

2.2

Matching curing agent

Topcoat curing agent

2.3

Mixing ratio

Main paint: curing agent = 5:1

2.4

Thinner

BSX-18

2.5

Dilution rate, 16~25s (coating-4 cup)

Thinner addition amount is 10%~30%

2.6

Leveling time, min

>10

Serial Number

Item

Index

Test Method

3.1

Film color and appearance

Meets standard board color difference range, flat and smooth

Visual Inspection

3.2

Flexibility, mm

<=1

GB/T1731-1993

3.3

Scratch test, grade

<=1

GB9286-1998

3.4

Pencil hardness (scratched)

>=%HB

GB6739-2006

3.5

Impact resistance, cm

>=%50

GB/T1732-1993

3.6

Water resistance

(Immersion in distilled water at 40±2℃ for 240h)

No bubbling, slight discoloration and loss of luster allowed, adhesion level 1.

GB/T1733-1993 Method A

3.7

Acid resistance

(Immersion in a solution of 0.1N sulfuric acid for 24h)

No bubbling, no wrinkling, slight discoloration and loss of luster allowed, adhesion level 1.

GB/T9274-1988 Method A

3.8

Alkali resistance

(Immersion in a solution of NaOH for 24h)

No bubbling, no wrinkling, slight discoloration and loss of luster allowed, adhesion level 1.

GB/T9274-1988 Method A

3.9

(Neutral salt spray test (scratched), ≥240h)

(Rust at scratched area ≤2mm, non-scratched area does not rust, bubble or peel off)

GB/T1771-2007