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Details about  Black Casting Resin, Urethane Plastic Polymer 1 quart

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Black Casting Resin, Urethane Plastic Polymer 1 quart
Black-Casting-Resin-Urethane-Plastic-Polymer-1-quart
Item Sold
Item condition:
New
Ended:
Jul 24, 2014
Price:
US $49.00
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$14.03 Standard Shipping | See details
Item location:
San Diego, California, United States

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Description

eBay item number:
330786615991
Seller assumes all responsibility for this listing.
Last updated on  Jul 21, 2014 10:15:06 PDT  View all revisions

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
 

AeroMarine Products

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AEROMARINE PRODUCTS BLACK URETHANE CASTING RESIN


1 QUART KIT



AeroMarine Products Jet Black Casting Resin 1 Quart Kit contains:


1 Pint Part A


and


1 Pint Part B 


**Always wear a respirator or self-contained breathing apparatus when working with urethanes.**


Do NOT spray.  Our urethanes are only for pouring applications.




AeroMarine Black Urethane Casting Resin is a thin, fast setting polymer used for casting parts for many applications.  It is a simple “one to one” mix ratio and cures very quickly (within 60 seconds at 70F).  Our black casting resin contains no fillers, has no odor, and cures to a deep black color. Our jet black casting resin is easily painted.  AeroMarine Products also offers an off-white casting resin, a crystal clear casting resin, as well as colorants for casting resin.



Click Here for the Technical Data Sheet




** PLEASE NOTE: AeroMarine Products jet black casting resin "goes off" very quickly (.ie.  within 60 seconds of mixing part a and b together), so make absolutely certain your mold is ready before you mix and pour the black casting resin!**



Directions for use:

 

Mix equal parts by volume.  To avoid excessive exotherm, mix small batches until you are familiar with using this material.  Various fillers can be added for custom results.  All urethanes are moisture sensitive, so fillers must be dry.  Store in sealed, dry containers.


This item ships in 1 box.


RETURNS: 30 Day return policy, buyer pays return shipping.

 

Features:

 

  • Low Viscosity
  • Little or no odor
  • Low shrinkage
  • Excellent electrical and mechanical properties
  • Good chemical resistance
  • Attractive black color
  • Virtually bubble free
  • High Dielectric strength- useful for electronic potting

 

Uses include:

 

  • Casting figurines
  • Casting toys and toy soldiers
  • Potting electronic assemblies
  • Casting fishing lures
  • Taxidermy applications
  • Casting industrial parts

  

Specifications:


                        Mixed viscosity:                        100 cps (Almost water thin)

                        Color:                                       Black

                        Work life:                                  1 minute @70F

                        Demold time:                            15 Minutes @70F

                        Hardness:                                 75- 80 Shore D (Very hard)

                        Flexural Strength                       8200psi

                        Tensile Strength                        5840psi

                        Dielectric Strength                     >400 volts per .001”

Specific Gravity                         1.09

Specific Volume                        28 cubic inches per pound

                       


Best practices when using urethane casting resin

 

 

 

Never mix less than about 3 ounces of product.  When manufacturers design and test their resins, they normally write the specifications for 100 gram batches, which is about 3 ounces.

There are two bad things that can happen when mixing a smaller batch.  Because the sample is small, it is much more difficult to get the mix ratio correct. Also, these mixtures are exothermic, meaning that they generate heat in order to cure.  A tiny batch does not generate enough heat to cure the resin properly.

 

Avoid mixing with drill motors.  Mixing with an electric drill can cause a few problems.  They don’t get into every corner of the mixing container.  Also, if they spin too fast they can generate friction in the resin causing it to exotherm out of control resulting in premature curing.  Powered mixing also can generate a lot of air bubbles.

 

If you use a mold release, let it dry for a while.  A spray can of mold release contains a lot of solvents and propellants.  These compounds need to evaporate off the surface so they don’t cause bubbles.  Check the dry time of the mold release from the directions on the label.

 

Don’t vary the mix ratio. Unlike some polyester resins, altering the mix ratio to vary the cure cycle doesn’t work with urethanes. 

 

Mix everything twice-  Mix the two components together in a clean container, then transfer the mixture to another clean container and mix them again.  The theory is that the liquids clinging to the sides and bottom of the containers don’t get mixed well.  By transferring the mixture to another clean container, you are assured that everything is well mixed.  Any unmixed material stays in the first container.

**When using fast, water-thin casting resins you may only have time to mix it once, but since it is water thin it will probably mix fine in one mix.**

 

Mix in plastic containers.  Paper cups and wooden mixing utensils/tools contain moisture which may adversely affect the polyurethane.  Avoid waxed paper cups because the wax may melt and contaminate the resin.

 

How to avoid air bubbles- Air bubbles in urethanes are almost always caused by moisture.  Do everything possible to avoid moisture getting into the mix.  This includes replacing the lids onto the containers promptly after use as well as avoiding using the product during rainy days or times of high humidity.  Avoid pouring against an unsealed water based product such as plaster or hydrocal.  Seal plaster or hydrocal with something such as Krylon Clear Acrylic.  Also, we stock an aerosol nitrogen blanket called “Extend-It” that can increase the shelf life of the urethane during storage.

 

Avoid mixing a large batch-The larger the batch, the more exotherm or heat is generated in the cure cycle.  If you are casting a large part, consider mixing small batches to make the process more manageable.  Thickness of the pour also affects the exotherm and cure speed.  A very thin pour will take much longer to cure than a thick pour.

 

Shake or stir well before use- The liquid components may settle in the containers during storage.  Therefore, it is a good idea to shake or stir the components separately before mixing.  Let it sit a few minutes to let any bubbles rise to the surface after shaking the container.

 

Test- Always make a test to determine the feasibility of your process.  There are many unforeseen factors that can affect the outcome of your project.  Running a controlled test may be inconvenient, but it can make the “Learning Curve” of processing these products much easier.

 

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