ThreeBond 1372D Anaerobic sealant

ThreeBond 1372D is an anaerobic sealant with a high glass transition temperature. Thus its use prevents the misalignment of shafts that the heat of a high-speed motor can cause. It does not cure in air. Rather, when it penetrates into narrow gaps in metallic parts, it quickly reacts and cures by polymerization; thus it bonds or seals the parts of the joint. Any adhesive that overflows can be cured by ultraviolet irradiation.

·	Is a high-strength anaerobic sealant for joints.
·	Has a higher glass transition temperature than conventional sealants.
·	Has low viscosity and excellent penetrativeness.

Bonding and sealing of metallic part joints

Properties

Before curing

Test items	Units	Attribute	Test method	Remarks
Major component	-	(Metha) acrylic acid ester	-
Color	-	Green	3TS-201-01	Observed visually
Viscosity	mPa s(cP)	110(110)	3TS-210-01	BL viscometer 60rpm
Specific gravity	-	1.07	3TS-213-02	25°C

Cured object

Test items	Units	Attribute	Test method	Remarks
Major component	-	Polyacrylic resin	-
Bonding strength*	MPa(kgf/cm²)	33.0(336.3)	3TS-305-01	Iron (s45c/ss41)
	MPa(kgf/cm²)	30.5(311.1)	3TS-305-01	SUS304
	MPa(kgf/cm²)	27.0(275.3)	3TS-305-01	Aluminum
Set time	min	3	3TS-220-05	1kgf development time
Glass transition temperature	°C	147	3TS-304-21	*2

*1 The test piece used in the strength measurement had a bonding area of 6Øx15mm and a clearance of 1/100 mm.

*2 The ultraviolet-cured object was measured with DMS; the temperature was at the maximum value of tan ð.

Curing speed


Test condition:	Applied 1372D to the joint of the iron test piece; assembled the part; cured it at 25°C; and measured the compressed-shearing strength at intervals.