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.
- High Performance Casting Systems
+Polyester Base High-Performance
++ Ester Base Full Prepolymer Systems
+Polyether Base High-Performance
++ Ether Base Full Prepolymer Systems
- Click Here for Isocyanate-Prepolymer Products
- Room-Temperature-Curable Systems
Ester Base High-Performance Formulations
Ester base high-performance polyurethanes are known for high tensile strength, excellent abrasion resistance as well as cut/tear resistance. Parts molded with these types of materials are used in a variety of applications including liners in material handling, grain elevator buckets, pulleys, sprockets, and other mechanically demanding applications. These are also known for excellent oil resistance; however, for long-term use in constant aqueous environments, we recommend considering one of our polyether systems listed under this.
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These are systems consist of a MDI/Ester prepolymer at higher %NCO (15 - 26 %) cured with our special curatives. "Quasi" systems are known for low viscosity and relatively lower processing temperature.
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Die-C Cut/Tear Resistance (pli) |
Sprit Tear Resistance (pli) |
Abrasion Resistance (mg loss) |
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95 A |
5500 |
700 |
913 |
576 |
75 |
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85 A |
6200 |
800 |
720 |
475 |
30 |
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80 A |
6000 |
900 |
600 |
350 |
15 |
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70 A |
4200 |
800 |
300 |
160 |
12 |
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These are conventional prepolymer systems consists of MDI/Ester prepolymers at lower %NCO (less than 15 %), can be cured with 1,4-Butanediol, other standard amine/polyol urethane curatives, or our special curing agents. These are commonly called "hot-cast" urethane systems.
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Die-C Cut/Tear Resistance (pli) |
Sprit Tear Resistance (pli) |
Abrasion Resistance (mg loss) |
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60 D |
6120 |
300 |
950 |
461 |
85 |
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95 A |
4260 |
400 |
700 |
300 |
80 |
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90 A |
4200 |
650 |
600 |
300 |
62 |
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85 A |
5800 |
725 |
725 |
450 |
22 |
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Products
- Our Products
§ High Performance Elastomers
· MDI/Ether
Ether (PTMEG) Base High-Performance Formulations
Ether (PTMEG) base high-performance polyurethanes are known for "high-energy" characteristics, which include high-rebound, excellent abrasion resistance, and high elongation. Together with their excellent tensile and cut/tear resistance, parts molded with these materials are preferred in a variety of applications including inline skate wheels, sizing screens for mined products such as rocks/sand/minerals, material handling parts, and other highly demanding applications. These are also known for excellent water resistance and are recommended for long-term use in constant aqueous environments.
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These are systems consist of a MDI/Ester prepolymer at higher %NCO (15 - 26 %) cured with our special curatives. "Quasi" systems are known for low viscosity and relatively lower processing temperature.
|
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Die-C Cut/Tear Resistance (pli) |
Sprit Tear Resistance (pli) |
Abrasion Resistance (mg loss) |
Bashore Rebound (%) |
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80 A |
4000 |
750 |
450 |
250 |
8 |
68 |
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70 A |
3800 |
900 |
350 |
200 |
3 |
70 |
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These are conventional prepolymer systems consists of MDI/Ester prepolymers at lower %NCO (less than 15 %), can be cured with 1,4-Butanediol, other standard amine/polyol urethane curatives, or our special curing agents. These are also commonly called "hot-cast" urethane systems.
|
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Die-C Cut/Tear Resistance (pli) |
Sprit Tear Resistance (pli) |
Abrasion Resistance (mg loss) |
Bashore Rebound (%) |
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50 D |
4100 |
250 |
610 |
225 |
90 |
30 |
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90 A |
3610 |
840 |
560 |
134 |
35 |
62 |
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Products
- Our Products
§ Room-Temperature-Curable Formulations
Because of the low-cost mold and simple molding process, using this type of material requires a relatively smaller initial investment to start a production. The materials cure at room temperature; thus, very often, the initial tooling and equipment cost can be very low. Some of the existing applications are:
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Concrete molds and patterns |
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Vibration dampening, noise reduction, bumpers, and padding products |
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Encapsulation material for electronic components |
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Prototyping and small runs of products |
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Die-C Cut/Tear Resistance (pli) |
Sprit Tear Resistance (pli) |
Mixing Ratio By Volume (Weight) |
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30A |
260 |
550 |
40 |
20 |
1: 1.053 (1:1) |
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47A |
450 |
520 |
90 |
14 |
1:3 (1:2.618) |
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50 A |
450 |
400 |
92 |
14 |
1:3.200 (1:2.790) |
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| MPP-A60A |
60A |
525 |
260 |
113 |
14 |
1:2.731 (1:2.383) |
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65A |
480 |
180 |
92 |
15 |
1:2.633 (1:2.300) |
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80 A |
1100 |
180 |
140 |
25 |
2:3 (1:1.312) |
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90A |
1800 |
350 |
250 |
90 |
1:1 (1: 0.877) |
Rigid Urethane (for prototyping of plastic product etc.)
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Flexural Strength (psi) |
Flexural Modulus (psi) |
Mixing Ratio By Volume (Weight) |
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80D |
8000 |
5 |
10,000 |
300,000 |
2:1 (1: 0.454) |
§
Concrete Mold Making Resins
The following casting resin systems are specially formulated to serve mold-making application for pre-cast concrete operations. The components for these formulas are less moisture sensitive than the general purpose formulas. Pot-lives for these formulations are relatively long to allow wide working time. The mixing ratios are made to be easy one-to-one or one-to-two ratio for ease of handling.
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Product Code |
Hardness (Shore Durometer) |
Tensile Strength (psi) |
Ultimate Elongation (%) |
Die-C Cut/Tear Resistance (pli) |
Sprit Tear Resistance (pli) |
Mixing Ratio By Volume (Weight) |
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25A |
156 |
171 |
44 |
23 |
1: 1 (1: 0.966) |
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