MPG-D70A
MPG-D70A
Northstar Polymers, LLC
3444 Dight Avenue So.
Minneapolis, MN 55406
Tel: 612.721.2911
Fax: 612.721.1009
E-Mail:
Northstar Polymers, LLC is a member of Polyurethane Manufacturers Association.
Copy right reserved by Northstar Polymers, LLC 2000 - 2007. Northstar Polymer prohibits duplication of the contents of this web site for the purposes of public display and/or using on another web site without a written authorization by Northstar Polymers, LLC.
MPG-D70A
65 - 70 D Durometer Hardness
Room-Temperature-Curable Polyurethane Casting System
MPG-D70A is room-temperature-curable polyurethane casting elastomer system designed for molding polyurethane parts with tough, but flexible physical characteristics. The typical applications for this formulation includes prototyping, casing, and in-house tool making.
The components for this formulation have low viscosity, which is an advantage to fill thinner parts of the mold; it helps recreating the fine resolution of the mold surface pattern, and avoids trapping large air bubbles. Relatively forgiving pot-life and short demolding time helps the production rate when it is use in a project with a larger production quantity requirement.
Components
Part-A (Prepolymer): MGA-018
Part-B (Curative): PBA-013
Mixing Ratio: Part-A: Part-B = 4 : 3 (or 1: 0.75) by volume
Part-A: Part-B = 1: 0.675 by weight
Processing Temperature:
Part-A: Ambient
Part-B: Ambient
Mold: 70 – 120 °F
* Heating the mold to 100 – 120°F range is recommended if there is a very thin section in your part
Curing Pattern:
Pot life: 3 minutes (at 70 °F)
Demolding Time: 7 minutes for ½” or thicker part:
(Thinner parts may require 20 to 40 minutes for demolding with an ambient temperature mold.)
Complete Cure Cycle:
3 to 4 days for ½” or thicker parts, 5 to 7 days for 1/8” or thinner parts
Typical Physical Properties of the Cured Product
Hardness: 65 - 70 D Durometer
Tensile Strength: 3600 psi
Elongation: 60 %
Die-C Tear Strength: 880 pli
Part-B material contains powder material (moisture scavenger powder), which may settle at the bottom of the container. Please agitate part-B liquid component in the container before dispensing.
When you use this material, please be sure to operate in a wide open area with a good air circulation or good ventilation, wear rubber gloves, long sleeves, and protective eyewear to avoid skin/eye contact of the material. Please read the Material Safety Data Sheets for the details on the safety and handling for the component materials.
For any questions, please contact Northstar Polymers.
Storage:
Part-A component (prepolymer) contains isocyanate component, which is very much sensitive to moisture. If it is left in air, part-A will react with atmospheric moisture and ruined. This reaction is non-reversible. Soon after opening a can and dispensing the content, nitrogen gas or negative-40-degree-due-point dry air needs to be injected to the can to blanket the material. Silica gel or calcium chloride desiccant filter should be installed to 55 gallon drum-vent for your drum feeding system. The storage temperature should be at a room temperature between 65 and 90 ºF.
Part-A material freezes below room temperature. The material is expected to arrive frozen in cold seasons. Please follow the thawing instructions provided by Northstar Polymers to thaw the material before using.
Part-B component may be hygroscopic. If the material is exposed to ambient air, it may absorb moisture. Moisture contaminated part-B material may become source of degradation or excessive bubbles in the product. Avoid exposure of the material to air. Purging the empty space in the container with nitrogen gas or negative-40-degree-due-point dry air is also recommended to prevent moisture contamination of part-B as well. The storage temperature should be at a room temperature between 65 and 90 ºF. The moisture contamination of part-B material can be reversible. Please consult Northstar Polymers for the drying method.
Safety:
The component materials are industrial-grade chemicals. Please keep them in a secure place and prevent access from any unauthorized individual. The personnel who handle these materials need to read the Material Safety Data Sheet (MSDS) for detail information on safety and handling of the material. The MSDS for each component is sent with the shipment of the material.
When conducting a test or producing your parts using this material, be sure to operate in a wide-open area with good air movement, or in a well-ventilated area. Wear rubber gloves, long sleeves, and protective eyeglasses to prevent skin/eye contact of the material. When your operation involves heating or spraying of the material, we recommend, in addition to the above, installation of a proper ventilation system and using a half-face respirator recommended for the use to prevent inhalation of the fume.
Direct contact of polyurethane raw materials to skin/eye, as well as ingestion may lead to health problems. No eating or smoking should be permitted at the working area. The operator should wash hands well with soap and water after handling the materials. Please refer to the MSDS for each component for the detailed health information.
For any questions, please contact Northstar Polymers.
Tel: 612-721-2911.
Fax: 612-721-1009
Web Site: http://www.northstarpolymers.com
E-Mail: info@northstarpolymers.com
Northstar Polymers, LLC
3444 Dight Avenue South
Minneapolis, MN 55406
Tel: 612.721.2911
Fax: 612.721.1009
E-Mail: info@northstarpolymers.com
Notice: All of the statements, recommendations, suggestions, and data concerning the subject material are based on our laboratory results, and although we believe the same to be reliable, we expressly do not represent, warrant, or guarantee the accuracy, completeness, or reliability of same, or the material or the results to be obtained from the use thereof, neither do we warrant that any such use, either alone or in combination with other materials, shall be free of the rightful claim of any third party by way of INFRINGEMENT or the like, and NORTHSTAR POLYMERS DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY and FITNESS FOR A PARTICULAR PURPOSE.