Körapur® 784

Identification

Chemical Family

Polyurethanes (PU),

Urethanes

GBU

EA

RTU Product Type

2K (2 component) Adhesive,

Reactive Adhesive

Categories

Markets → Automotive & Transportation → Applications → Transportation → Marine

Technologies → Adhesives & Sealants → Product Families → Bonding Technology → 2K Liquid Reactive Adhesives

Application Information

Cure Method

Chemical Cure

Applications

Application Area

Side Panels

Compatible Substrates & Surfaces

Metal,

Plastics,

Aluminum,

Steel,

Acrylonitrile Butadiene Styrene (ABS),

Polyvinyl Chloride (PVC),

Aluminum Alloys,

Carbon Fiber Reinforced Plastics (CFRP),

Alloy Steel,

Glass Fibre Reinforced Polymer (GFRP)

Applications & Uses

Processing

Processing temperature: 15°C to 25°C

• Preparation:

The surfaces must be clean, dry and free of grease. Metals must normally be pretreated and possibly sanded. Surfaces of glass fiber-reinforced plastics must also be sanded. Resin and hardener must be thoroughly mixed with a stirrer (approx. 400 revs/min) until the mixture shows a uniform color. Prepare tandem cartridge as instructed.

• Bonding:

Apply adhesive evenly with a spatula or a doctor blade to the surfaces and join them. The thickness of the adhesive layer depends on the properties of the materials to be bonded. By different A-components, the pot life and the bond strengths can be varied. When using Körapur 784, the bond can be exposed to light strain after 12 hours. Final bond strength is reached after 24 hours. High temperatures will shorten the curing time, low temperatures will lengthen it.

A-component	Pot life	Handling time after
Körapur 784/5	5 minutes	1-2 hours
Körapur 784/1	1 minute	15 minutes

• Cleaning: Körasolv PU

Clean tools immediately after use. Cured adhesive can only be removed mechanically.

Features

Ready-to-Use Product Features

Fast Setting,

Good Toughness

Features & Benefits

Labeling Claims

Solvent-free

Packaging & Availability

Country Availability

Australia,

Canada,

Switzerland,

China (Mainland),

Japan,

Korea,

Malaysia,

New Zealand,

Philippines,

Turkey,

Taiwan,

USA

Packaging Type

Cartridges

Regional Availability

• Asia Pacific
• Europe
• North America
• Latin America

Packaging Information

• 50 ml Tandem cartridge (2 pieces per packaging unit) with static mixer
• 400 ml Tandem cartridge with static mixer

Properties

Density:

1600 kg/m³

Shear Strength:

13 MPa

Specific Gravity:

1.6

Viscosity:

40000 cps

Cured Properties

	Value	Units	Test Method / Conditions
Hardness	75	Shore D	DIN EN ISO 868
Lap Shear Strength (substrates: aluminium/aluminium)	15	mPa	DIN EN 1465
Pot Life	1	min	Kö-test method 100172
Pot Life	3	min	Kö-test method 100172
Pot Life	2005	min	Kö-test method 100172

Component A

	Value	Units	Test Method / Conditions
Density	1.2	g/cm³	DIN EN 542
Storage Temperature	15 - 25	°C	-
Viscosity	40000	mPa·s	Kö-test method 100000

Component B

	Value	Units	Test Method / Conditions
Density (Köracur® TH 715)	1.6	g/cm³	DIN EN 542
Density (Köracur® TH 717)	1.6	g/cm³	DIN EN 542
Isocyanate Content (Köracur® TH 715)	14	%	-
Isocyanate Content (Köracur® TH 717)	14	%	-
Storage Temperature (Köracur® TH 715)	15 - 25	°C	-
Storage Temperature (Köracur® TH 717)	15 - 25	°C	-
Viscosity (Köracur® TH 715)	32000	mPa·s	Kö-test method 100000
Viscosity (Köracur® TH 717)	26000	mPa·s	Kö-test method 100000

Processing Properties

	Value	Units	Test Method / Conditions
Mixing Ratio (Part A : Part B)	1:1	v%	-
Mixing Ratio (Part A : Part B)	1:1.3	wt %	-
Processing Temperature	15 - 25	°C	-
Service Temperature	- 160 to 90	°C	-
Short Term Temperature Resistance (60 min)	120	°C	-

Safety & Health

Precautions

When processing Körapur 784 avoid direct skin contact with the uncured adhesive. Wear protective gloves. Hazardous fumes may form when the product is heated or sprayed.

Storage & Handling

Storage Condition

Do not store below 10°C, Körapur® 784 should be used within the shelf life specified on the packaging. The storage stability applies to material stored under appropriate conditions only (original unopened containers, recommended storage temperature).

Shelf Life

max. 12 months

Technical Details & Test Data

Processing Information

Suitable Substrates	PVC-U (rigid)
	Various aluminium alloys
	Various steel alloys
Consistency	Various composite materials (e.g. CFRP, GFRP)
	Non-sagging
	Pasty
Surface Requirements	Dry
	Clean
	Free of grease
	Free of dust
Application Method	Using side-by-side cartridge with static mixer
Application Equipment	Two part mixing and metering system
Product is free of	Solvents

 

• Cleaner for Tools Körasolv® PU
• Moisture Sensitivity The adhesive must not be exposed to moisture before and during application. Moisture causes foaming leading to lower mechanical properties.