Megatite PM Epoxy Adhesive

Two Part Epoxy Adhesive for Fiberglass Pipes
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Megatite PM Two-Part  Epoxy Adhesive

Megatite PM is a two-part room temperature curing adhesive. The kit consists of resin, hardener, gloves, and a spatula. Megatite PM is based on epoxy resin and amine hardeners It is useful for a various range of metals and fiberglass-based products such as GRP, GRE, ABS, SMC, etc, and for taper/taper connections in fiberglass pipes and fittings formulated by the Pouyesh Composite Yekta company. This adhesive has excellent chemical resistance and also thermal resistance up until 212 °F (100°C).

Applications of Megatite PM epoxy adhesive

Megatite PM is used for taper/taper connections in fiberglass pipes and fittings in different transmission lines.

Crude oil transfer

سیستم خنک کننده با آب دریا

Seawater cooling systems

خطوط مایعات خورنده صنعتی

Transfer of corrosive liquids

لوله های پساب صنعتی

Industrial effluent

سکوی فراساحلی

Marine and offshore platforms

لوله های خطوط آب شرب

Transfer of drinking water

Advantage of Megatite PM epoxy adhesive

  • Thermal resistance up to 212°F (100°C).
  • High chemical resistance towards most chemical materials.
  • Texotropic properties.
  • Room temperature curing.
  • Increasing properties after post curing.
  • Suitable for metals and fiberglass components i.e., GRVE, GRP, GRE.

Uncured Physical Properties of Megatite PM epoxy adhesive

property Resin
Hardener Adhesion
Color Dark grey white
grey
Viscosity in 77°F (25°C) 6000 – 10000 4200 – 6400 texotropic
Weight (g/cm2) 1.4 1.2 1.3
Gel time for 100g in 77°F (25°C)


30 minutes
چسب اپوکسی مگاتایت PM

Directions for Use of Megatite PM epoxy adheive

  1. Before mixing ingredients, degrease, clean and dry both surfaces completely. You can use acetone, ethanol, methanol or other solvents. Use a cloth or soft sandpaper to clean surface of any dust or foreign matter. If the adhesive was not added within one hour after cleaning, the cleaning process must be repeated.
  2. Mix all the resin in the container with all the hardener, never mix an approximate amount of the ingredients. The formulation must be thoroughly mixed for at least three minutes until a homogenous mixture is achieved.
  3. Apply adhesive with a 0.5-0.8mm thickness on the inner surface and a 0.8-1mm thickness on the outer surface of the bond then slowly bring both surfaces close to each other to tighten. Rotate the tube by a quarter period if possible. Make sure the bond is set completely. If needed, use a wooden hammer to hit the end of the pipe. Never hit pipes and fittings with a metal hammer.
  4. Remove excess adhesive with the spatula.
  5. Ensure the heat curing cycle before using or testing the pipe line. You can find full cure time in different temperatures in table 2. No impact stress should be applied on the connection during cure time (i.e.  removing or shaking pipes). To achieve maximum chemical and mechanical properties, expose the bond to cure in 302°F (150°C) for one hour using a heating blanket.

Processing of Megatite PM epoxy adhesive

Mix ratio According to weight
Resin 100g
Hardener 25g

 

نسبت ترکیبی چسب اپوکسی

Curing Conditions

Temperature 59°F (15°C) 77°F (25°C) 104°F (40°C) 140°F (60°C)
Time needed to obtain minimum 1 MPa shear strength. 7 hours 3 hours
1 hour
30 minutes
Time needed to obtain minimum 10 MPa shear strength. 7 days
4 4 days
48 hours
24 hours

 

After room temperature curing, a bond with optimal properties is obtained. But in case higher properties are needed, post cure or heat cure the joint area. For post curing, one hour at 248°F (120°C) is suggested.

Pot Life of Megatite PM Epoxy Adhesive

The pot life of the adhesive from mixing the ingredients until hardening and being no longer in use is shown in the following table and is calculated for 100g of adhesive in various temperatures.

Temperature
59°F (15°C)
68°F (20°C) 77°F (25°C) 86°F (30°C) 35
Time
50
35 30 22 20

 

Cure time of Megatite PM Epoxy Adhesive

Special heating blankets should be used to cure. The cure time is based on the distance of the heating blanket and the bond line. The bond line should be preheated if it was below 59°F (15°C) or above 75% of humidity

Temperature
77°F (25°C)
176°F (80°C) 284°F (120°C) 302°F (150°C)
Full cure time
7 days
2 hours
1 hours
30 minutes

Cured Characteristics of Megatite PM Epoxy Adhesive

The following table shows the shear strength of the adhesive on different surfaces. Shear strength on metal surfaces is measured according to ASTM D 1002 standards. Shear strength on composite surfaces is measured according to ASTM D 5868 standards.

Megatite PM Epoxy Adhesive shear strength in heat curing

Surface material Average strength (MPa)
Steel 15
GRP 10
GRE 10
GRVE 10
CFRP 12

Preparing surface: sand blasted, washed with acetone. Curing conditions: 24 hours in room temperature and one hour in 248°F (120°C)

Megatite PM Epoxy Adhesive shear strength in room temperature curing

Surface material Average strength (MPa)
Steel 12
GRP 10
GRE 10
GRVE 10
CFRP 12

Preparing surface: sand blasted, washed with acetone. Curing conditions: 7 days in room temperature.

Megatite PM Epoxy Adhesive shear strength in 176°F (80°C)

Temperature Shear strength (MPa)
176°F (80°C) 11.2
Preparing surface: sand blasted, washed with acetone. Curing conditions: 7 days in room temperature. Used steel as surface.
176°F (80°C) 14
Preparing surface: sand blasted, washed with acetone. Curing conditions: 24 hours in room temperature and one hour in 248°F (120°C). Used steel as surface.

Adhesive shear strength after being immersed in fluid for 90 days in room temperature.

Room temperature cured

Immersion fluid Average strength (MPa)
Acetone 6
Methanol 7
Distilled water 9
Acetic acid 10% 8
Sulfuric acid 10% 8

Preparing surface: sand blasted, washed with acetone. Curing conditions: 24 hours in room temperature and one hour in 248°F (120°C). Used GRE composites as surface.

Adhesive shear strength after being immersed in fluid for 90 days in room temperature.

Heat cured

Immersion fluid Average strength (MPa)
Acetone 10
Methanol 11
Distilled water 11
Acetic acid 10% 10
Sulfuric acid 10% 10

Preparing surface: sand blasted, washed with acetone. Curing conditions: 7 days in room temperature. Used GRE composites as surface.

Adhesive shear strength after being immersed in water in different temperatures

Room temperature cured

Immersion condition in water Average strength (MPa)
Initial amount in 73.4°F (23°C) 12
After 2000 hours in 73.4°F (23°C) 14.5
Initial amount in 176°F (80°C) 11.2
After 2000 hours in 176°F (80°C) 16
Initial amount in 212°F (100°C) 10
After 2000 hours in 212°F (100°C) 15.5

Preparing surface: sand blasted, washed with acetone. Curing conditions: 7 days in room temperature. Used steel as surface.

Heat cured

Immersion condition in water Average strength (MPa)
Initial amount in 73.4°F (23°C) 15
After 2000 hours in 73.4°F (23°C) 14.5
Initial amount in 176°F (80°C) 14
After 2000 hours in 176°F (80°C) 15.8
Initial amount in 212°F (100°C) 14.2
After 2000 hours in 212°F (100°C) 15.5

Preparing surface: sand blasted, washed with acetone. Curing conditions: 24 hours in room temperature and one hour in 248°F (120°C). Used steel as surface.

Determination of TG by DSC method

TG test was applied on heat cured and room temperature cured adhesives to identify adhesive’s heat resistance. The test was applied according to ASTM E 1356 standards.

Cure conditions TG
7 days in room temperature. 176°F (80°C)
24 hours in room temperature and one hour in 248°F (120°C) 249°F (121°C)

Absorption rate of water and chemicals

The absorption rate of water and chemicals were calculated in different time periods according to ASTM D 570 standards.

Immersion fluid Immersion time Absorption rate (%)
Distilled water 2000 hours 0.11
methanol 2000 hours 1.38
acetone 2000 hours 0.13
Xylene 2000 hours 0.4

Cure conditions: 24 hours in room temperature and one hour in 248°F (120°C)

Precautionary Information of Megatite PM Epoxy Adhesive

  • In case of contact to skin, wash immediately with plenty of cold water and soap. Wash and reuse contacted clothing.
  • In case of eye contact, wash eyes with plenty of water for 20 minutes, clean the lower and upper eyelids then see a doctor.
  • In case of swallowing, do not vomit, keep the patient warm and immediately transfer to hospital.
  • Keep out of reach of children
  • Keep away from fire

Storage of Megatite PM Epoxy Adhesive

  • Maximum storage life for sealed products is 24.
  • Store indoors in 41-95°F (5-35°C).
  • In lower temperatures, mixing the ingredients would be more difficult. In higher temperatures, its active lifespan would be shortened.
  • Do not use after expiring date.
  • Check the expiring date label on the package.

Packaging of Megatite PM Epoxy Adhesive

Each product comes with two parts (resin and hardener), a spatula and elastic gloves in the following packages:

1000 grams
250 grams
200 grams

 

Shelf Life of Megatite PM Epoxy Adhesive

Maximum storage life for sealed products is 24 months if stored at 35-104 °F (2-40°C) with no change in adhesion nor appearance. The expiring date is mentioned on the package.

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