HTF-GUIDE - Sirgel

HTF

HTF 803 Resin/HTF 403 Hardener

HTF 803 Resin/HTF 403 Hardener is specially an epoxy system developed for trenchless pipeline rehabilitation to provide a tough, flexible liner in services at temperatures up to about 50 – 60°C. It has tremendous elongation; dynamic strength; abrasion resistance; excellent adhesion & lowest curing shrinkage, The final products based on this system also has less water sensitivity, quicker curing speed, hydrocarbon & caustics resistance and higher burst strength.
The HTF-803 Resin with HTF-403 Hardener system has a high elongation and is quite flexible making it highly resistant to cracking and suitable for use with some synthetic fibre hoses as reinforcement in pressure pipe application where a corrosion inhibitor is required and where the pipeline has only minor pinhole leaks. It is suitable for different pipeline repairing under various conditions, which would have shorter operating time and lower cost.

Typical Properties
HTF 803 Resin	Units	Value
Epoxide equivalent weight1	g/eq	185-190
Viscosity2
@ 20°C	P	75
@ 25°C	P	36
@ 30°C	P	20
Density @ 25°C3	g/ml	1.13

HTF 403 Hardener	Units	Value
Equivalent weight		103
Viscosity2
@ 20°C	P	11
@ 25°C	P	7
@ 30°C	P	5
Density @ 25°C3	g/ml	0.97
1 ASTM D1652 (Epoxy content of Epoxy Resins-Perchloric Acid Method.) 2 ASTM D445 (Kinematic Viscosity- Determination of the viscosity of liquids by Ubbelohde Viscometer) 3 ASTM D1475 (Density of Liquid Coatings, Inks, and Related Products)

Typical Handling Properties
Units Value
HTF 803 Resin	pbw	100
HTF 403 Hardener	pbw	50
Mix viscosity1
@ 20°C	P	48
@ 25°C	P	30
@ 30°C	P	21
Pot-life @ 25°C (5 kg)2	hrs	4
Maximum Service Temperature	°C	50
Cure time3 @ 50 – 60°C	hrs	2 – 3
1 ASTM D445 (Kinematic Viscosity – Determination of the viscosity of liquids by Ubbelohde Viscometer) 2 Time for viscosity to reach 250 poise utilizing Brookfield viscometer. 3 This is standard laboratory cure for determining physical properties. In field practice, times and temperatures will vary to suit conditions.

Typical Cured Properties
Table below shows the physical properties of the HTF 803 Resin/HTF 403 Hardener system for both pure castings and polyester mat composite samples at various temperatures.
Pure Castings1	ASTM	Units	Value
Tensile	D 638
Strength		MPa	51.7
Modulus		MPa	2,661
Elongation		%	11.5
Flexural	D 790
Strength		MPa	86.9
Modulus		MPa	3,000
Glass transition temperature	DSC D 3418	°C	75
Heat deflection temperature	D 648	°C	50
Coefficient of Thermal Expansion	D 696	m/m/°C x 10-5	8.9
from 10 – 50°C
Mat Composite2	ASTM	Units	Value
Tensile Properties
at Various Temperatures	D 638
Strength 　@ 25°C		MPa	35.9
@ 49°C		MPa	21.4
@ 71°C		MPa	10.3
@ 93°C		MPa	6.9
Modulus 　 @ 25°C		MPa	2,758
@ 49°C		MPa	827
@ 71°C		MPa	20.7
@ 93°C		MPa	17.2
Elongation @ 25°C		%	3
@ 49°C		%	16
@ 71°C		%	16.5
@ 93°C		%	17
Mat Composite2	ASTM	Units	Value
Flexural Properties
at Various Temperatures	D 790
Strength @ 25°C		MPa	60.0
@ 49°C		MPa	20.7
@ 71°C		MPa	7.6
Modulus @ 25°C		MPa	2,965
@ 49°C		MPa	689
@ 71°C		MPa	20.7
Chemical Resistance @ 25°C3	Modified D 543
Distilled Water			Resistant
20% Sodium Chloride			Resistant
5.25% Sodium Hypochlorite			Resistant
1. All test specimens were cured 3 hours at 71°C. 2. Composite 83% resin/17% 6 denier mat cured in a press for 3 hours at 71°C at 0.138 MPa. 3. 12 weeks chemical soak, (Determined resistant by 3% or less weight change)