Product Introduction

Paint remover Paintpeel 670 Series
Nippon Hyomen Kagaku Kabushiki Kaisha R & D center・ The coating film swelling type makes it easy to recover

Introduction
There are many painted parts around us such as
automotive parts, precision equipment such as digital
cameras and PCs, and building materials. On the other hand,paint peeling must also be considered, such as "cleaning ofjigs used in painting", "regeneration of defective painting

the coating film after peeling, allowing long-termrunning.
・ Free of chlorinated and brominated solvents for easy
handling
・ Analytical control is also possible.

products", and the like. The role of the paint remover is tocleanly remove the paint film of the painted article andreturn it to a condition equivalent to that before painting.
This paper introduces "Paintpeel 670", a semi-water-based
paint remover, which is a substitute for paint remover using"chlorine-based solvent" and "pyrrolidone-based solvent" asa proposal from JASCO.
Figure 1: Example of Paint Peeling
Table1: Examples of Painted Products
Painted product

Type of base material

Painting typeSteelAutomotive parts
Stainless steelPrecision equipment

Urethane

Table 2: Types of Paintpeel
Product nameCharacteristics

Example of base material

Paintpeel 670A

Alkaline

Steel, Stainless steel, etc.

Paintpeel 670C

NeutralCopper
Building materials

AcrylicAluminum

Daily necessities

Zinc and Aluminum
castings, etc.

Epoxy
Magnesium

Furniture Cookware

etc.
Plastic

Copper, Aluminum,
Paintpeel 670S

Acid
Stainless steel, etc.

etc.
etc.

Acid

Copper, Aluminum,(concentrated)

Stainless steel, etc.

Paintpeel 670SK

Product Summary
JASCO Paintpeel 670 series covers a wide range of pH

Operating Procedure

regions, including alkaline, neutral, and acid (standard andJASCO Paintpeel 670 series is a simple operation toconcentrated products) types. Therefore, it can be selected

immerse in treatment solution and float the coating film

from four types depending on the type of base material and(Figure 2).

coating film (Table 2). It can be used for regeneration of*See Table 3 for usage instructions.

products, jigs, etc.
*See Table 3 for legal regulations.
Features・A lineup of alkaline/neutral/weakly acid types
depending on base material and coating film.

・ Excellent paint peeling performance.

Figure 2: Peeling Process of Paintpeel Series

202010301 JASCO Nippon Hyomen Kagaku Kabushiki Kaisha 1

[Product Introduction] Paintpeel 670 Series

Table 3: Conditions for Use of Paintpeel Series
670A

670C

670S

670SK

Concentration

600 mL/L to undiluted

800 mL/L to undiluted

300 mL/L to undiluted

500 mL/L to undiluted

Temperature

25℃ to 45℃

25℃ to 80℃

25℃ to 80℃

25℃ to 70℃

Time

as needed

as needed

as needed

as needed

Stainless steel,

Stainless steel,Heat resistant Polyvinyl

Heat resistant Polyvinylchloride,chloride,

Polypropylene tank

Polypropylene tankelectric heater

electric heater

electric heater

electric heater

NANA

deleterious substancedeleterious substance

NANANANA

hazardous materials

hazardous materials

category IV

category IV(flammable liquid)(flammable liquid)

Condition

Stainless steel,
Processing tankHeat resistant Polyvinyl

Polyvinyl chloride,chloride,

Polypropylene tankHeating method

Polypropylene tankPoisonous and deleterious
substances control act*
Law rules

PRTR*

Fire service act*

hazardous materials
NA

category IV(flammable liquid)* Corresponds to Japanese laws and regulations.
PRTR: Pollutant Release and Transfer Register
NA: not applicable

Table 4: Correspondence Table of Base Material of Painted Products and Paintpeel 670
Type of base
Steel

Stainless steel

CopperAluminum

ADC

ZDC

no change

no change

significant

significant

significant

significant

changechangechangechangeno change

almost no changeslight changeslight changeslight changeslight change

significant

significant

almost no changeslight changeslight changechangechangechangesignificant

significant

changechangeMagnesium

material
Paintpeelslight change

670A
Paintpeel
no change
670C
Paintpeelsignificant

670S

changePaintpeelsignificant
slight change

670SK

slight changealmost no changeslight changechange

The appearance change of the base material was visually evaluated.
(processing temperature: Paintpeel 670A; 40℃, Paintpeel 670C, Paintpeel 670S, and Paintpeel 670SK; 60℃)
Notice: the condition of the base material may change depending on the setting of processing conditions such as processing temperature and time.

Mechanisms
The peeling by Paintpeel 670 is performed in three steps:
1. the paint remover penetrates the coating film interior, 2.

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the coating film swells, and the adhesion force between thebase material and the coating film decreases, and 3. thecoating film swollen by washing with water or brushing isremoved (Figure 3). Coating film recovery after peeling isFigure 3: Processing Mechanism of Paintpeel Series

easy because of the coating film swelling type.

202010301

JASCO Nippon Hyomen Kagaku Kabushiki Kaisha 2

[Product Introduction] Paintpeel 670 Series

In closing
Paintpeel 670 series is a new paint remover of JASCO,
and many are adopted in coating film peeling of paint jigs
and painted products. Paint peeling of various base material
are possible because they cover a wide range of pH regions
including alkaline type, neutral type, and acid type. However,since the types and surface conditions of the base materials
and coatings are varied, it is necessary that the "peelingdegree of the coating film" and the "state of the base material
after peeling" were confirmed by a prior study.

202010301

JASCO Nippon Hyomen Kagaku Kabushiki Kaisha 3