Clear long-term yellowing-resistant polyurethane encapsulation coating compound

JOMP 410 Polyurethane potting adhesive is a polyurethane material that can be cured at room temperature or heated. This two-component polyurethane has excellent insulation and moisture-proof performance, suitable for electronic packaging and sealing.
High transparency, yellowing resistance, flame retardant, good leveling, good shock resistance, high and low temperature no shrinkage, solvent-free moisture resistance,Insulation, with sealing and bonding double layer function.
Stable mechanical and electrical properties between -50 and 120℃

product details

JOMP 410A/B polyurethane potting adhesive

product description

JOMP 410Polyurethane potting compound can cure without heating. After thoroughly mixing the A component and B component in a 100:50 (by weight) ratio, the product cures within a certain period of time to form a protective layer. The cured compound has the following characteristics: resistance to moisture, contaminants, and other atmospheric components.

High transparency, yellowing resistance, flame retardant, good leveling, good shock resistance, high and low temperature no shrinkage, solvent-free moisture resistance,Insulation, with sealing and bonding double layer function.

Stable mechanical and electrical properties between -50 and 120℃

Conventional performance

test item	testing standard	unit	A component	B component
surface	visualization	—	Colorless and transparent liquid	Colorless and transparent liquid
dynamic viscosity	GB/10247-2008	mPa· s(25℃)	300± 100	700± 100
density	GB/T13354-92	g/ cm 3(25℃)	0.92± 0.05	1.23± 0.05

Operation process

project	Unit or condition	numeric value
mixing ratio	proportion by weight	100:50
Hybrid viscosity	mPa· s(25℃)	600± 100
Mixed density	g/ cm 3(25℃)	0.98± 0.05
Operation time (1)	min(25℃)	180±30
curing time	℃/hr	80/2 or 25/24

1.The operation time is tested with the amount of 100g of gel.

Take out components A and B in proportion, mix them uniformly by stirring, remove bubbles by vacuum, pour into the product to be filled during the operation period. If the product is too large,

it is recommended to fill it in several times, and then cure according to (80℃/120 min or 25℃/24 hours).

The product is recommended to be cured at 80℃, and can reach initial curing within 1 hour.

Operating precautions

Material A and B are prone to absorb water and deteriorate. Try to use them up after opening. If they cannot be used up at one time, nitrogen should be filled in the barrel and sealed for protection

Or seal directly and use it up in a short period of time. It is recommended to evaluate the performance of the adhesive by mixing a small amount before reusing it to see if it is qualified.

When mixing A and B glue, attention should be paid to stirring in the same direction, otherwise too many bubbles will be mixed in; the glue on the edge and bottom of the container should also be mixed evenly, otherwise the local non-curing phenomenon caused by uneven stirring will occur.
Vacuuming the product again to remove bubbles can improve the comprehensive performance of the cured product.
Low temperature will lead to slow curing speed, heating can shorten the curing time. The curing process of this adhesive is an exothermic reaction, the amount of mixing will affect the operation time, so the operation time under 100g mixing is only a reference time.

Typical performance

project	testing standard	unit	numeric value
hardness	GB/T 531.1-2008	Shore A	25A
thermal conductivity	GB/T10297-1998	W/ mK	0.2
coefficient of expansion	GB/T 20673-2006	μm/(m,℃)	20
water absorption	GB/T 8810-2005	24h,25℃,%	<0.2
cubical contraction	ISO 3521:1997	%	<0.2
tensile strength	GB/T 528-2009	MPa	0.8 MPa
elongation at break	GB/T 528-2009	%	80
glass-transition temperature	ISO11357-2:2013	℃	-45
dielectric strength	GB/T1695-2005	kV/ mm(25℃)	>16
Loss factor	GB/T1693-2007	(1MHz) (25℃)	0.07
dielectric constant	GB/T1693-2007	(1MHz) (25℃)	4.12
volume resistivity	GB/T1692-2008	(DC500V)Ω· cm	2.0× 10 13
fire resistance	UL-94	level	V-0

Product technical descriptio

Note: All the above data were measured after curing for 7 days under conditions of 25℃ and 55% RH.

packing specifications

Agent A 10 kg Agent B 5 kg ；Agent A 20 kg Agent B 10 kg

Storage and transportation

A and B components should be stored in a cool, dry and clean sealed container at room temperature. It is recommended that they be transported and stored as non-hazardous materials (5℃); 2. Storage period: A components: 12 months; B components: 6 months.