Mxbon 21435 Rubber Toughened Cyanoacrylate Adhesive

The rate of cure can be affected by temperature, humidity, the smoothness of the surface, the closeness of the surface and specific surfaces being bonded. Although full functional strength is developed in a relatively short time, curing continues for at least 24 hours before full chemical/solvent resistance is developed.

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. Acidic surfaces such as paper and leather may have longer cure times than most plastics and rubbers. Some plastic with very low surface free energies, such as polyethylene, polypropylene, PTFE and silicone rubber may require the use of a primer. The table below shows the fixture time achieved on different materials at 25℃/50% RH. This is defined as the time to develop shear strength of 0.12 N/mm2 (1.2 kgf/cm2 ) and the strength keeps at least 10 seconds.

Bonding Identical Substrate	Fixture time , seconds
Mild steel	40 to 55
Aluminum A5754	30 to 50
ABS (Acrylonitrile Butadiene Styrene)	10 to 25
PVC(Polyvinyl chloride)	40 to 60
PC(Polycarbonate)	45 to 55
Oak wood	60 to 80
Pine wood	60 to 90
Beech wood	40 to 60
NBR(Nitrile-Butadiene Rubber)	20 to 30
Paper	<5

Cure Speed vs. Bond Gap

The rate of cure will depend on the bond line gap. A thinner bond line will give faster polymerization and a strong bond. Largebond gaps will result in a slower cure and lower bond strength. Cartell Activator may be used to increase cure speed.

Cure Speed vs. Activator

Cartell Cyanoacrylate Activators may be used in conjunction with Cartell Cyanoacrylate Adhesive where cure speed needs to be accelerated. Cure speeds of less than 2 seconds can be obtained. The use of an activator may reduce the final bond strength. If bond strength is critical testing on the parts is recommended to measure the effect. When using the activator apply it to one side of the bond and the adhesive to the other.

Adhesive Properties

Cured for 72 hrs @ 25℃

Lap Shear Strength, ISO 4587/ASTM D1002/JIS K6850

Lap Shear Strength, ISO 4587/ASTM D1002/JIS K6850	kgf/cm2	N/mm2	psi
GBMS (Grit Blasted Mild Steel)	264.9	26.0	3767.8
Aluminum A5754	130.8	12.8	1860.4
ABS	101.6*	9.9*	1445.1*
PVC(Polyvinyl chloride)	120.4*	11.8*	1712.5*
PC(Polycarbonate)	99.1*	9.7*	1409.5*
NBR(Nitrile-Butadiene Rubber)	7.1*	0.7*	101.0*

*substrate failure

Important Notice: Strength results will vary depending on the level of surface preparation and gap

Cured for 72 hrs @ 25℃

Block Tensile Strength, ISO 6922/ASTM D2095/JIS K6849

Bonding Identical Substrate	kgf/cm2	N/mm2	psi
Stainless Steel	442.0	43.3	6286.7

Cured for 72 hrs @ 25℃

Side Impact Strength, ASTM D950

Bonding Identical Substrate	kJ/m2	ft-lb/in2
Stainless Steel	10-15	4.6-7.2
Aluminum	8-12	3.7-5.7

Cured for 24 hrs @25℃

T Peel Strength, ISO 11339

Bonding Identical Substrate	kgw/cm	N/mm
Stainless steel	5.24	5.14

Cured for 24 hrs @25℃

Physical Properties

Coefficient of Thermal Expansion, ISO 11359-2, mm/mm/K	90 × 10-6
Coefficient of Thermal Conductivity, ISO 8302, W/mK)	0.1
Glass Transition Temperature, ISO 11359-2, ℃	150
Hardness, ISO 868, Shore D	80

Cured for 24 hrs @25℃

Electrical Properties

Dielectric Constant, IEC 60250, @ 10kHz	2.5
Dielectric Breakdown Strength, IEC 60243-1, kV/mm	25
Surface Resistivity, IEC 60093, Ω	5-9 × 1015
Volume Resistivity, IEC 60093, Ωcm	5-9 × 1015
Dielectric Dissipation Factor, IEC 60250, @ 10kHz	<0.025

 

Cured for 1 week @ 25℃

Lap Shear Strength, ISO 4587/ASTM D1002/JIS K6850

GBMS (Grit Blasted Mild Steel)

Heat Aging

Aged at temperature indicated and tested @25℃

Chemical/Solvent Resistance

Aged under conditions indicated and tested @25℃

Environment	Temp. ℃	100 hrs	500 hrs	1000 hrs
Water	25	95	96	88
Ethanol	25	102	103	98
Isopropanol	25	102	105	98
Water/Glycol	25	101	103	104
Unleaded Gasoline	25	98	95	92
Motor Oil	25	100	102	96
98% Relative Humidity	40	96	89	82

 

Additional information

This product is not recommended for use in contact with strong oxidizing materials and polar solvents although will withstand a solvent wash without any bond strength deterioration. Users are reminded that all materials, whether innocuous or not, should be handled in accordance with the principles of good industrial hygiene. Full information can be obtained from the Safety Data Sheet (SDS).

Directions for use:

1) Make sure the surfaces to be bonded are clean, dry and grease-free before applying the adhesive.

2) Dispense a drop or drops to one surface only.

3) Bring the components to together quickly and correctly aligned.

4) Apply sufficient pressure to ensure the adhesive spreads into a thin film.

5) Do not disturb or re-align until sufficient strength is achieved, normally in a few seconds.

6) Any surplus adhesive can be removed with solvent, such as nitromethane or acetone.

7) Because Mxbon® 21435 condenses by polymerization, sometimes blooming will occur on the surface of the container or the bonded materials. Should this happen, wipe surface well with acetone or nitromethane.

8) Product should be allowed to develop full strength before subjecting to any service loads (typically 24 to 72 hours after assembly, depending on bond gap, materials and ambient conditions).

Storage

Keep in a cool area out of direct sunlight. Refrigeration to 2-8℃ gives optimum storage stability. When stored in a refrigerator, allow the adhesive to gradually warm to room temperature prior to use. It will prevent condensation inside the bottle which can reduce shelf life. Containers should be tightly sealed when not in use. Product removed from containers may be contaminated during use. Do not pour back any product to the original container. Misuse of product will void all warrantees. The shelf-life is 18 months from date of manufacture.

 

1) Use with proper ventilation. Avoid contact with skin and eyes.

2) If contact with skin occurs, rinse with warm water or dissolve gradually with solvent such as acetone or nitromethane. Do not try to remove forcibly.

3) If adhesive gets into eye, keep eye open and rinse thoroughly. Seek medical attention immediately.

4) Keep well out of reach of children.

5) Keep adhesive in a cool, dry location and out of direct sunlight. For long-term storage, refrigeration(2-8℃)is recommended. 6) When take out the product form refrigerator, please allow adhesive to reach room temperature before opening bottle to prevent condensation inside the bottle which can reduce shelf life.