Nukote XT-plus – Chemical Resistance

Nukote XT-plus – Chemical Resistance

A fast set, rapid curing modified polyurea

Nukote XT-plus is a fast set, rapid curing modified polyurea designed for use in application on concrete or steel or other substrates where exposure to high acidic or alkaline chemical concentrations are present. It is designed for acid and base environments and is a 100% solid, flexible, aromatic, two components spray polyurea that can be applied to suitably prepared concrete and metal surfaces. It’s extremely fast gel time makes it suitable for applications down to -30°C. It may be applied in single or multiple applications without appreciable sagging and is relatively insensitive to moisture and temperature allowing application in most temperatures. Nukote XT plus is suitable where anaerobic and aerobic waste by products combined with elevated temperatures are expected. The product is commonly specified in conjunction with other Nukote product in monolithic compositions.

Features

  • 100% solids with zero VOC
  • Fast reactivity and cure time resulting in almost immediate return-to-service time
  • Can be applied in temperatures from -30°C and upwards
  • Perform inconstant temperatures from -30°C to +120°C
  • Retains physical properties at -30°C to +120°C
  • Moderate elongation properties
  • Seamless, resilient, flexible and tough
  • Excellent Acid & Base Resistance (consult NCSI)
  • Good corrosion protection
  • Impact, tear and abrasion resistant
  • Low permeability waterproofing membrane

Typical uses:

  • Fertiliser Plants
  • Refineries
  • Chemical processing plants
  • Mining
  • Oil & gas, petroleum industries
  • Paper and Pulp Mills
  • Pharmaceuticals
  • Primary & Secondary containment
  • Water, waste water and industrial effluent treatment plants
  • Power and Desalination Plants

Color

Standard medium grey only, custom colors, blended to match any RAL number, are available upon request subject to minimum quantity.

Packaging

Nukote XT plus is available in:

  • 380 liter sets shipped in metal drums of 190 liters each of Side A and Side B,
  • Or 38 liter kits shipped in plastic pails of 19 liter of Side A and 19 liter of Side B,
  • Or 2090 tote set shipped in hardened plastic-metal reinforced UN approved totes of 1045 liters each of side A and side B.
TECHNICAL DATA (All values @25°C)
Solids by volume 100%
Volatile Organic Compounds 0 gm / lit
Theoretical coverage@ 1mm 1m² / lit
Specific Gravity (kg/liter) A-1.11,
B-0.96
Viscosity at 25°C in cps (ASTM D 412) A-200
B-500
Shelf life @ 25°C 12 to 15 months
Tensile strength (ASTM D 412 C) 9 to 10 MPa
Elongation (ASTM D412) 40-50%
Hardness ASTM D 2240 45 to 50 Shore D
Flexibility (2mm mandrel ASTM 1737) Pass
Water Vapour Permeability ASTM E 96 0.00042 perm-inch
Water Absorption -24 hours (ASTM D 471) < 0.5%
Crack Bridging @-25°C (ASTM C836), 25 cycles Pass
Tear strength (Die C ASTM 412) (KN/m) 40 to 45
Impact Resistance > 20 J
Fire Rating Class 2
Flash point Pensky Martin > 93°C
Service temperature (Dry) -30°C to 120°C
Abrasion Resistance (ASTM D 4060) 15 mg loss Taber CS 17 Wheel 1kg/1000 rev
PROCESSING PROPERTIES (Under standard lab conditions)
Mix ratio V/V 1:1
Gel time 6 to 20 seconds
Tack free time (DFT & Temerature dependant) 30 to 45 seconds
Post cure time 24 hours

(The above properties and values are highly dependent on equipment, equipment settings, spray gun, chamber, tip size, pressure and related parameters and slight variations are possible). The above values are as per NCSI Standard lab practieces & methodology)

Application

This material must be applied utilizing high-pressure, heated plural component spray proportioning equipment, such as those manufactured by GlasCraft®, Gusmer® and Graco®. The proportioning equipment utilized must be capable of supplying correct pressure and heat for the appropriate hose length on a consistent basis. Both Part-A and Part-B material should be preconditioned at 25-30° before application. For optimum performance, the substrate should be abrasive blasted. Concrete subtrates should be allowed to cure a minimum of 30 days. On concrete, Nukote XT plus should always be applied over a suitable primer for maximum adhesion. Please review your specific project with Nukote technicians. For all submersed applications, a primer is absolutely essential, after proper preparation. Recommended DFTs are a function of the project, please contact a Nukote technician. On horizontal surface applications, a texture “stipple” coat can be applied for non-skid purposes, after reaching the initial desired film thickness.

Chemical resistance

Each Nukote product formulation has varying levels of resistance to specific chemicals. Please review the chemical immersion test data included in the Nukote Test Book for general resistance to specific chemicals at specific concentration levels. Chemical concentrations are complex and when combined with temperatures above ambient levels this complexity increases exponentially. Contact Nukote Technical Personnel for specific recommendations for chemical resistance prior to specifying these products in this application type. Consult with NCSI for more details on product and chemical resistance. The following chart is the results of Polyurea immersed in chemicals and tested as per ASTM D 3912.

Chemicals Resistance Chemicals Resistance
Hydrochloric acid 15% R Sodium Hydroxide 50% R
Sulphuric acid 50% R Ammonium Hydroxide 20% R
Phosporic acid 10% R Potasium hydroxide 20% R
Acetic acid 10% R Sodium Bicarbonate 30% R
Nitric acid 25%, HF 10% S Sodium Hypochlorite 14% R
Water @ 80°C R Calcium Hydroxide 30% R
Diesel R Hydrogen sulphide (gas) R
Hydraulic oil R Sewage R