Bio-Base Mold Urethane
Northstar Polymers, LLC
3444 Dight Avenue So.
Minneapolis, MN 55406
Tel: 612.721.2911
Fax: 612.721.1009
E-Mail: info@northstarpolymers.com
Northstar Polymers, LLC is a member of Polyurethane Manufacturers Association.
Copy right reserved by Northstar Polymers, LLC 2000 - 2007.
Bio-Base Mold-Making Urethane Materials
Introduction
Northstar Polymers has developed bio-base mold-making materials, which contain more than 40% of renewable materials derived from agricultural products. The physical properties of these materials are comparable to near-100% petroleum based materials used in this application. In comparison with the petroleum derived materials, the prices are very competitive and very stable. The contained renewable materials include refined soybean oil polyols, whose major raw material is soybeans grown in the United States.
The formulations are designed to give important characteristics as a mold-making material. The properties of the formulations include:
Two-part casting system
Liquid at room temperature
Low viscosity of the mixture to create fine resolution
Allows relatively long pot-life
Cures within overnight for demolding hardness
Yields the ideal hardness range for mold materials for concrete products
Less susceptible to atmospheric moisture in operation
Property Comparisons with the Standard Mold-Making Materials
Our lab tests indicate that these bio-base mold-making materials compare very well against existing petroleum base materials. The following is the typical properties of the new Bio-Base formulations as well as the standard mold-making materials at two different hardness ranges.
65A Durometer
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|
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Bio-Base Polyurethane Mold-Making Material (65A) |
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Standard Polyurethane Mold-Making Material (65A) |
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Tensile Strength |
|
695 psi |
|
450 psi |
|
Elongation |
|
252 % |
|
147 % |
|
Die-C tear resistance |
|
99 pli |
|
92 pli |
|
Tear Resistance |
|
27 pli |
|
10 pli |
Processing Data of 65A Durometer Bio-Base Formulation
Mixing ratio: A:B = 1: 1.50 by volume (1: 1.29 by weight)
Pot Life: About 18 minutes
Demolding: 16 hours (overnight) at room temperature
Hardness in 24 hours: 55- 45 A
Complete Curing: 3 days at room temperature
Hardness in 3 days: 65 A (+,-5)
Renewable source materials: 47% by weight
80A Durometer
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|
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Bio-Base Polyurethane Mold-Making Material (80A) |
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Standard Polyether RTC (80A) |
|
Tensile Strength |
|
1220 psi |
|
1120 psi |
|
Elongation |
|
190 % |
|
177 % |
|
Die-C tear resistance |
|
110 pli |
|
140 pli |
|
Tear Resistance |
|
110 pli |
|
25 pli |
Processing Data of 85A Durometer Bio-Base Formulation
Mixing ratio: A:B = 1.0: 1.0 by volume (1: 0.871 by weight)
Pot Life: 15 - 19 minutes
Demolding: 16 hours (overnight) at room temperature
Hardness in 24 hours: 70 – 55A
Complete Curing: 3 days at room temperature
Hardness in 3 days: 80 A (+,-5)
Renewable source materials: 40% by weight
For any questions, please contact Northstar Polymers.
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.