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Our Isocyanate Prepolymer Products

 

Northstar Polymers carries a variety of isocyanate terminated prepolymers.  Our prepolymers are specially formulated for casting applications to yield ideal molding/casting properties and superb physical properties of the cast parts.  We carry the following standard prepolymers as well as specialty prepolymers, and we also custom formulate for your requirements.

 

Standard Prepolymers for High Performance Casting Elastomers

 

MDI/Polyester Base Prepolymers

 

Product Code

NCO%

Equivalent Weight

Specific Gravity

Viscosity

(cps.)

@71 °F

Viscosity

(cps.)

@180 °F

Note

MSA-018

23.0

183

1.204

1200

60

Quasi prepolymer* for various formulas

MSA-030

14.0

301

1.196

n/a

300

60D Durometer when cured with 1,4 Butanediol

MSA-042

10.0

420

1.190

n/a

750

95A Durometer when cured with 1,4 Butanediol

MSS-052

8.14

516

1.188

n/a

1500

90A Durometer when cured with 1,4 Butanediol

MSA-063

6.71

623

1.169

n/a

1700

85A Durometer when cured with 1,4 Butanediol

 

 

MDI/PTMEG Polyether Base Prepolymers

 

Product Code

NCO%

Equivalent Weight

Specific Gravity

Viscosity

(cps.)

@71 °F

Viscosity

(cps.)

@180 °F

Note

MGA-018

23.0

183

1.132

1000 - 1200

50

Quasi prepolymer* for various formulas

MGA-036

11.8

355

1.096

n/a

500

50D Durometer when cured with 1,4 Butanediol

MGA-044

9.5

442

1.053

n/a

700

95A Durometer when cured with 1,4 Butanediol

MGA-048

8.7

483

1.070

n/a

950

90A Durometer when cured with 1,4 Butanediol

 

Standard Prepolymers For Room-Temperature-Curable Formulations

 

MDI Prepolymer with Polypropylene Glycol Ether or Blend

 

Product Code

NCO%

Equivalent Weight

Specific Gravity

Viscosity

(cps.)

@71 °F

Viscosity

(cps.)

@180 °F

Note

MPN-023

18.6

226

1.173

1200

< 100

Quasi prepolymer* for various RTC** formulas

MPG-023

18.6

226

1.112

1200

< 100

Quasi prepolymer*r for softer range RTC** formulations

MPA-135

3.00

1400

1.056

70,000

3,400

Prepolymer for gel elastomer and moisture cure systems

 

Specialty Prepolymers:

 

Clear Aliphatic Prepolymer with Polycaprolactone

 

Product Code

NCO%

Equivalent Weight

Specific Gravity

Viscosity

(cps.)

@71 °F

Viscosity

(cps.)

@180 °F

Note

ISB-060

6.8

618

1.077

n/d

n/d

75A Durometer when cured with 1,4 Butanediol

ISN-140

3.0

1402

1.077

>70,000

n/d

Prepolymer for clear one-part moisture cure systems

 

TDI/PTEMG High Performance Prepolymer

 

Product Code

NCO%

Equivalent Weight

Specific Gravity

Viscosity

(cps.)

@71 °F

Viscosity

(cps.)

@215 °F

Note

TGN-082

5.1

816

1.065

n/d

350

92A Durometer when cured with MOCA

 

Custom Prepolymers

 

Aside from the above standard prepolymers, we can custom formulate prepolymers for your specific needs.  We carry following raw materials to produce custom formulations***:

 

 

Standard Isocyanates:

MDI (pure MDI, modified MDI, and polymeric MDI)

TDI (2,4 / 2,6 isomer blends in various ratios)

 

Aliphatic Isocyanates for Custom and Specialty Prepolymers:

H12MDI

IPDI

 

Standard Polyols:

Polyester Polyols (Adipic Polyester Polyols)

Polypropylene Glycol Polyether Polyols

PTMEG Polyether Polyols

 

Polyols for Custom and Specialty Prepolymers:

Polycaprolactone Polyester Polyols

Polyethylene Glycol Polyols (<1000 MW)

 

Notes:

* ”Quasi Prepolymers” are cured with various specially formulated curing agents

** RTC= room temperature curable formulations

*** The federal environmental regulations may require registration of the prepolymer. The cost of regulatory clearance and time may become prohibitive for some custom prepolymer formulations.  Please consult Northstar Polymers representative for custom formulation requirements.

 

 

 

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.