Serial Number

Item

Index

Test Method

1.1

State in Container

Viscous liquid, easy to stir, no obvious sediment.

Measurement

1.2

Original paint viscosity, S (Ford cup-4/20℃)

≥70

GB/T1723-1993 Method B

1.3

Original paint fineness, um

≤20

GB/T1723-1979

1.4

Non-volatile content,

% (105±2)℃/2h/approx. 2g

≥50

GB/T1725-2007

1.5

Storage stability (5~30℃) for 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

Matching curing agent

2.3

Mixing ratio

Base paint: curing agent = 4:1

2.4

Thinner

Special thinner

2.5

Dilution rate, 16~25s (Ford 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, smooth and flat.

Measurement

3.2

Flexibility, mm

<=1

GB/T1731-1993

3.3

Scratch test, grade

<=1

GB9286-1998

3.4

Pencil hardness (scratch)

> = HB

GB6739-2006

3.5

Impact resistance, cm

> =40

GB/T1732-1993

3.6

Gloss (60°) unit value

> =90

GB9754-2007

3.7

Water resistance

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

(No bubbling, slight discoloration and loss of gloss allowed, adhesion level grade 1)

(GB/T1733-1993 Method A)

3.8

(Acid resistance)

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

(No bubbling, no wrinkling, slight discoloration and loss of gloss allowed, adhesion level grade 1)

(GB/T9274-1988 Method A)

3.9

(Alkali resistance)

(Immersion in a solution of sodium hydroxide at a concentration of N for 24h)

(No bubbling, no wrinkling, slight discoloration and loss of gloss allowed, adhesion level grade 1)

(GB/T9274-1988 Method A)

3.10

(Artificial climate (xenon lamp) aging for800h)

(Gloss loss rate ≤15%, slight discoloration allowed (△E≤3.0NBS))

GB/T1865-2009