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HAPREZ 3742   Economical   General Purpose   Laminating & Binder Systems

Economical     Low Viscosity     Multi-Purpose

  • An amber clear, general purpose, and economical system that be used as is, or with a variety of fillers, for virtually all room temperature casting and laminating applications.

  • As a laminating system, the extremely low viscosity of HAPREZ 3742 provides superior penetration and wetting of the fiberglass, and makes it especially advantageous for spraying with chopped fiberglass.

  • For casting, HAPREZ 3742  may be used unfilled for casting small, amber clear parts, or it may be heavily filled with sand for making throwaway molds and mock-ups. Larger parts can also be cast with high loadings of aluminum, and walnut shells for low cost and machinability, or with wood flour for making tooling putty.

  • HAPREZ 3742  is one of our most versatile products, and can be used almost universally in all room temperature applications.

Typical Properties *

 

Mixed Viscosity @ 75° F

1000 cps

Tensile Strength

8,000 psi

Elongation

12%

Compressive Strength

11,000 psi

Tensile Shear

4,000 psi

Water Absorption

1%

Dielectric Constant (60 HZ)

4.1

Power Factor (60 HZ)

0.014

Volume Resistivity  @ 77° F

1.2 x 10 ohm-cm

                             @100°F 

1.8 x 10 ohm-cm

(12 plys of Volan cloth)

  

Tensile Strength

55,000 psi

Compressive Strength

33,000 psi

* Properties will vary depending on hardener used. (see MIX RATIO CHART)

Directions For Use

 

 

HAPREZ 3744    High   Performance    Laminating    Paste

High heat/high performance      high strength    Fast and economical     Eliminates fiberglass cloth laminating    easy handling viscosity    Reduces repairs    Low shrinkage    

  • A room curing, smooth/thixotropic, color coded high performance, heat resistant, laminating paste which eliminates the need for labor intensive fiberglass cloth laminating procedures. HAPREZ 3744can be mixed in a high viscosity mixer, such as; a dough mixer, or by hand. The part A and the various Part B's are color coded, and when thoroughly mixed a different color is obtained.

  • Can be spread by hand (disposable protective gloves should be worn) or with a trowel to the desired thickness. 
    Spreads smoothly and quickly, reducing labor time by as much as 75%. 
    Fast and reduces costs dramatically.

  • Various cure times and heat distortion temperatures, up to 350ºF, are available through a choice of color coded curing agents. 
    Properties will vary depending on hardener used. (see     MIX RATIO CHART)

  • Some applications for HAPREZ 3744 are tooling, molds, fixtures, gages, and parts.

  • Can be used with any HAPCOAT surface coat, both flexible and rigid, depending on desired properties.

  • For HAPREZ 3744 properties with selected Hapcure hardener products, see MIX RATIO CHART.

  Directions For Use  

 

 

HAPREZ 3745    Clear     High Temperature     Laminating Resin & Binder

High Temperature / Performance       Low Viscosity     Multi-Purpose

  • A room curing, unfilled polymer system that can be used as a multi-purpose laminating resin for applications demanding up to 400°F. resistance.

  • Its excellent handling characteristics make it easy to mix and use, and HAPREZ 3745 gels rapidly, and provides excellent wetting of chopped or woven fiberglass. It is suitable for hand lay-up, or can be sprayed with conventional internal mixing equipment.

  • HAPREZ 3745 can also be filled with high loadings of sand, aluminum, or walnut shells for casting and mock-ups requiring higher temperature application.

 

Typical Properties:

Color

Amber Clear

Mixed Viscosity @ 75° F

6,000 cps

Tensile Strength

11,500 psi

Gel Time @ 25°C

45 Minutes

Compressive Strength

25,000 psi

Flexural Strength

13,000 psi

Hardness

85 Shore D

HAPREZ MIX RATIO CHART

Directions For Use

  

 

HAPREZ 3745 LV     Clear     Low Viscosity     Laminating Resin & Binder

High Temperature / Performance      Low Viscosity       Multi-Purpose

  • A low viscosity, room curing, unfilled polymer system that can be used as a multi-purpose laminating resin for applications requiring wet-out.

  • Its excellent handling characteristics make it easy to mix and use, and HAPREZ 3745 LV gels rapidly, and provides excellent wetting of chopped or woven fiberglass. It is suitable for hand lay-up, or can be sprayed with conventional internal mixing equipment.

  • HAPREZ 3745 LV can also be filled with high loadings of Fill-it, sand, or aluminum for casting and mock-ups requiring higher temperature application.

Typical Properties:

Color

Amber Clear

Mixed Viscosity @ 75° F

1,000 cps

Tensile Strength

7,000 psi

Gel Time @ 25°C

45 Minutes

Compressive Strength

25,000 psi

Flexural Strength

10,000 psi

Hardness

82 Shore D

HAPREZ MIX RATIO CHART

Directions For Use

  

 

HAPREZ 3746       Room   Temperature   Laminating    System

Close tolerance system    Low Viscosity   Easy to use

  • A low viscosity, room curing laminating system that is specifically formulated for use in automotive tooling aids, duplicates, Keller models, fixtures, spotting racks, foundry tools, and all other applications requiring laminates for use up to 200º F.

  • Provides excellent wetting characteristics on fiberglass cloth, and its smooth handling and excellent wetting qualities make it quick and easy to use. Its low viscosity characteristics also enables hand application by brush, roller, squeegee, or conventional internal mix spraying equipment.

  • Non-settling during storage and use, to yield completely uniform results with every use. It is also non-sagging to insure that the glass stays in place during fabrication and curing, and its long pot life characteristic enables continuous, non-stop laminating to any desired thickness.

  • While yielding exceptionally high strength properties, HAPREZ 3746 is also a close tolerance system. Low shrinkage factors of 0.0005 per linear inch are customarily obtained with this system, making it ideal for close tolerance applications.

  • May be used with any HAPCOAT system to provide a totally compatible laminate system.

Typical Properties:

 

Color

White

Mixed Viscosity @ 25° C

1,500 cps

Specific Gravity

1.3

Pot Life @ 250 C (100 gram mass)

30-40 minutes

Cure Time

24 hours @ 70º F

Hardness @ 25ºC

87 Shore D

Tensile Strength (12 Ply)

45,000 psi

Service Temperature

200ºF

Volume Resistivity @ 77ºF

1.2 x 10 ohm-cm

                            @100ºF

1.8 x 10 ohm-cm

Mix Ratio By Weight             Part A

100

                                           Part B

16

*Mix Ratio Range

14-17

HAPREZ MIX RATIO CHART

Directions For Use  

 

 

HAPREZ 3747     Our  Best  Room  Temperature  Laminating  System

Room  temperature  cure         Close tolerance          Reliable

  • A high performance, room curing laminating system that is specifically formulated for use in automotive tooling aids, duplicates, Keller models, fixtures, spotting racks, foundry tools, and all other applications requiring laminates for use up to 245º F.

  • Provides excellent wetting characteristics on fiberglass cloth, and its smooth handling and spreading quality make it quick and easy to use. Its low viscosity characteristics also enables hand application by brush, roller, squeegee, or conventional internal mix spraying equipment.

  • Non-settling during storage and use, to yield completely uniform results with every use. It is also non-sagging to insure that the glass stays in place during fabrication and curing, and its long pot life characteristic enables continuous, non-stop laminating to any desired thickness.

  • While yielding exceptionally high strength properties, HAPREZ 3747 is also a close tolerance system. Low shrinkage factors of 0.0005 per linear inch are customarily obtained with this system, making it ideal for close tolerance applications.

  • May be used with any HAPCOAT system to provide a totally compatible laminate system.

 

Typical Properties:

Color

White

Mixed Viscosity @ 25° C

3,800 cps

Specific Gravity

1.3

Pot Life @ 250 C (100 gram mass)

30-40 minutes

Cure Time

24 hours @ 70º F

Hardness @ 25ºC

87 Shore D

Tensile Strength (12 Ply)

49,000 psi

Service Temperature

245ºF

Izod Impact

0.47 ft. lbs/in

Mix Ratio By Weight             Part A

100

                   Part B

16

HAPREZ MIX RATIO CHART

Directions For Use

 

 

HAPREZ 3748    A  Truly  Universal  High Heat   Laminating  Resin  System

High heat    Universal  Easy to use

  • A two part, room curing, laminating system, that provides excellent performance results at all operating temperatures up to 300°F. As such, it can be used for room temperature applications, as well as in critical high heat conditions.

  • Easy to mix, gels rapidly, and provides excellent wetting or chopped or woven fiberglass. It is suitable for hand lay up, or can be sprayed with conventional internal mixing equipment.

  • May be used in combination with a HAPCOAT surface coat system to provide a totally compatible laminate.

  • Typical applications for HAPREZ 3748 are in vacuum forms, holding fixtures, rim molds, autoclave, vacuum bag molding, and any other applications where a strong laminate is necessary.

 

Typical Properties:

Mixed Viscosity @ 25ºC

3500-5000 cps

Color

Grey

Specific Gravity

1.25

Pot Life @ 25º C (100 gram mass)

60 minutes

Hardness @ 25º C

80 Shore D

Ultimate Tensile Strength (no glass)

9,500 psi

Ultimate Flexural Strength (no glass)

15,250 psi

Ultimate Compressive Strength (no glass)

31,780 psi

Continuous Service Temperature

300º F

Intermittent Service Temperature

350-400º F

Notched Izod Impact

0.45 ft. lbs/in

Di-electric Constant (1 HZ cycle 25º C)

4.2

Di-electric Strength (volts/mi)

450

Volume Resistivity @ 25º C

3.2 X 10

Mix Ratio By Weight  

Part A

100

Part B

16 
(see Mix Ratio Chart)

HAPREZ MIX RATIO CHART

Directions For Use

 

 

 

HAPREZ 3749  Our Best High Temperature Laminating System

High heat     High performance      easy to use

  • A high performance, low pot life, heat curing laminating system that is specifically formulated for all other applications requiring laminates for use up to 350º F. 

  • Ideal for oven cure, vacuum bag or pressure cure processing.

  • Provides excellent wetting characteristics on fiberglass cloth, and its smooth handling and spreading quality make it quick and easy to use. Its low viscosity characteristics also enables hand application by brush, roller, squeegee, or conventional internal mix spraying equipment.

  • Non-settling during storage and use, to yield completely uniform results with every use. It is also non-sagging to insure that the glass stays in place during fabrication and curing, and its long pot life characteristic enables continuous, non-stop laminating to any desired thickness.

  • Should be used with a HAPCOAT system to provide a totally compatible laminate system.

Typical Properties:

Mixed Viscosity @ 25°C

3800 cps

Color

Grey

Specific Gravity

1.3

Pot Life @ 25° C (100 gram mass)

60-90 minutes

Hardness @ 25°C

87 Shore D

Tensile Strength (12 ply)

55,000 psi

Flexural Strength (12 ply)

80,000 psi

Service Temperature

350° F

Izod Impact

0.47 ft. lbs/in

Cure Schedule

4-6 hrs @ 125-150°F plus

4-6 hrs @ 225-250°F

Mix Ratio By Weight

Part A

100

Part B

21 (see Mix Ratio Chart)

HAPREZ MIX RATIO CHART

Directions For Use  

 

  

 

 

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