Innovative Applications

Natural Polymers is continually focused on the development of spray applied soy-based urethane adhesive. We see a number of advantages to our simple yet innovative approach to this market segment. Currently, we have a number of different end user looking at this technology in a wide variety of applications.

Natural-Therm spray foam has far lower VOCs compared to other insulation methods. What does this mean for you? It means that within hours after your home is insulated, you can return to normal daily life without worrying about health issues which result from volatile organic compounds. Other spray insulation methods can leave your home unlivable far longer. Our Natural-Therm spray foam insulation meets and exceeds industry standards on safety through 2020.

Concrete Lifting

Concrete lifting is a type of polyurethane foam system that allows for concrete slabs to be lifted by drilling a series of small holes without the need to replace the entire slab. It's a faster, more economical way to fix a number of settling issues that can happen over time with various concrete slabs.

  • Cost Effective
  • Faster return of Service
  • Lifting and Leveling
  • Void Filling
Please contact a Natural Polymers sales associate for more information about our Natural-Therm® RL-5700 Series.
Contact

Specialty Services

Natural Polymers specializes in polyurethane system development and manufacturing. We offer a number of different services that help customers in a variety of different ways, from custom packaging to custom formulations. Please see a list below of some of these services in our in-house R&D center.
•  Formulation Development
•  Customer Packaging
•  High Density Foams
•  PrePolymers
•  Wiped/Thin Film Evaporation
•  Physical and Mechanical Testing

Marine Flotation Foam

Natural-Therm® 2250 Series is a marine foam system that meets the Title 33 CRG 183.114 (Table 1). Some of the key characteristics that differentiate Natural-Therm® 2250 from other marine foams are:

  • High Bio-Renewable Content
  • Consistent density distribution
  • Good Processing characteristics
  • Lower Exothermic Reaction for great lift thickness

Recommended Uses

  • General purpose pour applications
  • Molding
  • Floating devices

Natural-Therm® 2250 series marine foams have exceptional physical properties. The chart below helps show the relationship between applied pass thickness, polyurethane foam-in-place density, and compressive strength. Accordingly, all other physical properties will be affected by the in-place density of the polyurethane foam.

Table 183.114 – Flotation Performance Tests
TEST 183.144 (B) ENGINE ROOM BILGE (C) ENGINE ROOM UNLESS OPEN TO ATMOSPHERE (D) BILGE
(a) Vapor Test - X -
(b) 24 Hrs Gasoline Test - - X
(c) 30 Day Gasoline Test X - -
(d) 24 Hour Oil Test - - X
(e) 30 Day Oil Test X - -
(f) 24 Hour Bilge Cleaner Test - - X
(f) 30 Day Bilge Cleaner Test X - -

Typical Component Properties

  • Viscosity @ 25°C, cps
  • Specific Gravity @ 25°C, g/ml
  • Mixing Ratio, % by volume

Typical Reactivity Properties

Spray Reactivity@120°F
  • Cream Time, seconds……….38-48
  • Tack Free Time, seconds……120-130
A Component polymeric MDI Natural-Therm 2050, B Component, polyol blend
200 300
1.24 1.16
50 50

Typical Processing Parameters

Hydraulic Pressure, psi 500
Spray Pressure, psi
Hose Temperature 120°F
Static, A/B 900-1200
Preheat Temperature
120°F Dynamic, A/B 700-1000

Typical Foam Properties

Compressive Strength, 10% deflection, ASTM D-1621, parallel, psi 28
Initial K-Factor*, ASTM C-518, BTU in/hr ft2 °F 0.140
Tensile Strength, ASTM D-1623, psi 28
Water Absorption, ASTM D-2842, lb/ft2 (% by volume) 0125-0.155
Tumbling Friability, ASTM C-421 % loss 1.0-3.5
Closed Cell Content, ASTM D-2856, % >97.5
Dimensional Stability, ASTMD-2126, % volume change:
  @ -20°F @ 158°F @ 100°F/100% R.H.
7 Days 0.4 0.9 1.6
14 Days 0.7 1.13 2.0
28 Days 1.00 1.70 2.70
Image
This chart demonstrates the typical relationship between applied pass thickness, polyurethane foam-in-place density, and compressive strength. Accordingly, all other physical properties will be affected by the in-place density of the polyurethane foam.
Image
Rate of Rise Data at 50°F
Image
Choice criteria 1 [s] 50.0% R 20.9
Choice criteria 2 [s] 80.0% R 25.5
start time [s] 15.0 % v 14.5
rise time [s] 98.0% R 36.2
max. velocity [mm/s]   15.6
max. velocity at   18.7
max. temperature [C]   122.3