Spray Polyurea Elastomer Coating

Brief Introduction
The spray polyurea elastomer coating is fast-set, spray-moulding bi-component elastomer coating consisting of A component and the R component. A component is isocyanic acid semi- prepolymer by reaction between isocyanic acid and low-polymer diol or triol. R component is a mixture of polyether amine, amine extenders, paint, filler and other additives. A component and R component are sprayed through special spraying equipment from other countries. These two components, transmitted to the spray gun from the metering pump, are sprayed to the substrate surface, and become flexible, tenacious waterproofing, corrosion and wear-resisting coating through rapid mixing and rapid reaction consolidation.

Features
1. Rapid consolidation, spray moulding on any curved surface, inclined surface or vertical surface, without sagging
2. Insensitive to humidity and temperature, with no effect on construction
3. 100% solid content, without any VOC, pollution-free and environmentally-friendly
4. Outstanding physical performance, e.g.: tensile strength, elongation, flexibility, as well as wear, aging and corrosion resistance
5. Good thermal stability, can subjected to 120℃in long run and 350℃ short-time thermal shock.
6. Like the ordinary coatings, it can be in different colors when adding various kinds of dyes
7. Consecutive, seamless, non-aperture, beautiful and practical
8. Complete equipment, convenient and efficient construction, can meet design thickness through one-time construction

Application
This spray polyurea elastomer coating is extensively applied in underground waterproofing work, chemical engineering, and anti-corrosion and abrasion-resistance lining, shockproof and skidproof terrace.

No.	Item		Performance Index
			Ⅰ	Ⅱ	Ⅲ
1	Solid content, % ≥		99
2	Gelation time, s ≤		40
3	Surface drying time, min ≤		1
4	Hard drying time, min ≤		10
5	Tensile strength, MPa ≥		8	12	14
6	Elongation at break, % ≥		250	160	130
7	Peel strength, N/mm ≥		30	40	55
8	Flexibility at low temperature℃		-45	-40	-25
9	Unpermeability		0.3MPa, 30min impermeable
10	Adhesive force, MPa ≥		5.0
11	Hardness		85~90HA	91~98HA	51~58HD
12	Impact strength, kg·cm		50
13	Wearing resistance(700g, 500r),mg ≤		180	50	50
14	Artificial accelerated ageing		No chalking, cracking, peeling or discoloration
15	UV ageing treatment	Conservation rate of tensile strength, % ≥	80
		Conservation rate of elongation at break, % ≥	80

Construction Process
Substrate process: The substrate should be firm and flat, without floating dirt, iron stains and oil stains. Loose substrate part must be removed, and surface hole and aperture should be chiseled to V shape slot, moping with the polymer cement mortar. Clear the surface before construction.

Substrate treating agents: Spray 1-2 layer primer, and perform spraying construction after primer cures (normally 4-24 hours).

Coating construction: Adopt special spray equipment for spraying construction. The proportion of A component to R component is 1:1(volumetric ratio).

Coating Dose for Reference
1mm thick coating uses 1.15kg/m2 paint.

Construction Hints
1. During construction, you must wear overalls, wearing goggles, gloves, gas masks, and other labor protection supplies. Ensure good ventilation.
2. Thinning is prohibited.
3. Before construction, stir R component until it is well-distributed
4. The shortest time interval for coating is not restrictive, while the longest is no more than 3 hours.
5. Unspent A component deposits should be filled with nitrogen and preserved by sealing.

Package, Transportation and Preservation
1. Deposited in clean, dry, sealed packing barrels, whose packaging capacity is 20kg or 200kg.
2. Transport in accordance with non-dangerous article requirements. During transportation, prevent rain, insolation, squeeze, collisions, inversion, and maintain packaging intact.
3. Products should be stored in ventilative, dry, shady place to prevent exposure to direct sunlight. The storage temperature should be 15~40 degrees.
4. Storage life is six months.

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