ChemLine 784 APC Product

Description

ChemLine 784/31 delivers significantly improved product performance and anti-corrosion resistance. ChemLine 784/31 is formulated with new, patented breakthrough polymer, designed and engineered with 28 functional groups per molecule. This translates into 784 crosslinks versus four (4) for high temperature epoxies.

ChemLine 784/31’s Higher Cross-Link Density Means:

Higher Chemical Resistance
Higher Temperature Resistance
Higher Reactivity at Lower Temperature
Higher Resistance to Absorption
Higher Toughness

ChemLine 784/31 is heat force cured. When cured, ChemLine 784/31’s high functionality delivers an extremely dense crosslinked molecular structure. Unlike other coatings, ChemLine 784/31 cross-links through an ether (carbon-oxygen-carbon) linkage. This eliminates high concentrations of hydroxyl groups (found in epoxies) and precludes formation of ester groups (found in vinylesters) which are subject to hydrolysis and acid attack.

Industry Applications

Chemical Processing
Tanks, Reactor Vessels, Hazardous Waste Hauling, etc.
Paper & Pulp
Digesters, Black Liquor Tanks, Bleaching, etc.
Steel
Pickling Tanks, Acid Storage, Acid Waste, Neutralization, etc.
Mining
Acid Tanks, Scrubbers, etc.

Product Highlights

Superior bond strength and adhesion
Maximum product flexibility, product cycling
Repairable
Very low VOC - 108 grams/liter
Can be applied to pitted and/or corroded steel
Steam cleanable
Complies with FDA 21CFR 175.300
Non-permeable for product purity

More Chemical Resistance than:

Stainless Steel
Phenol Epoxies
Vinylesters
Phenolic

ChemLine 784/31Provides Superior Resistance To:

Acids, Alkalis and Solvents
Thermal Shock (-40°C to +204°C) -40°F to 400°F
Flex Stressing
Wear and Abrasion
Product Absorption
Impact
Under-Creep Corrosion

The Technology; Epoxies, Vinylesters and ChemLine 784/31 Form 3 Dimensional Screen-Like Structures when Cured

The Greater the Distance Between the Crosslinks, the Greater the Permeation Causing Chemical Attack and Absorption

Problems with Epoxies

Only 2 functionality
High concentration of Hydroxyl (OH) groups allowing attack by acids and solvents
Large opening between epoxy groups allowing penetration

Problems with Vinylesters

Only 2 functionality
Slightly smaller opening between vinylester groups than epoxies, still allows penetration
High concentration of Ester ( O=C) groups allowing attack by solvents and alkalies

CROSSLINKED SCREENLIKE STRUCTURE

ChemLine 784/31

28 functionality
Almost no opening between groups
No Hydroxyl groups
No Ester groups
Crosslinking through Ether (C-O-C) groups only. Ether bonds one of the strongest bonds in chemistry. Ether bonds give flexibility with chemical resistance.

Physical Properties

	Bend Test (3/4” Diam.) (ASTM D522-88)	270°
	Impact Test (ASTM D2794)	140 in. lbs
	Pull Off Strength (ASTM D4541)	2800-3100 p.s.i.
	Hardness Test (Barcol) (ASTM D2583)	75-80
	Taber Abrasion (wgt. loss)	3.92 mg/1000 cycles
	CS-17, 1000 g. load, 1000 cycles (ASTM D4060-90)
	Water Absorption (30 days @ 88° F) (ASTM D570)	0.89%

Typical Properties

	Color (Normal)	Gray/Red
	V.O.C. Level	108 grams/L (0.9 lbs. /gal).
	Lead/Chromate Content	Zero
	Pot Life	120 Minutes @ 24° C (75° F)
	Viscosity Reduction	Reduce with Toluene or Xylene
	Flash Point	53° C (127° F)
	Solids by Volume	89.6% (+/- 3%)
	Solids by Weight	95.5% (+/- 2%)
	Theoretical Coverage	2.9 m2/L @ 300 microns (120 sq. ft./fal. @12 mils)
	Recommended DFT	Average; Steel: 300 microns(12 mils)
	Shelf Life	12 months

Application Data
Note: The following application data is provided as a general guide only. Only full detailed application specifications are to be used during actual application of the ChemLine 784/31 system.

Surface Preparation
Grit blast to SSPC-SP5 (Nace #1, SA3) White Metal finish. Three to four mil (75-100 micron) blast profile desired.

Mixing Instructions
Material is supplied in two containers as a unit. Always mix a complete unit in the proportions supplied.
(1) Thoroughly mix the contents of Part A with a power agitator until uniform consistency and color is obtained. Be sure that any solids that may have settled through storage have been put back in suspension.
(2) Slowly combine the contents of the activator with the previously mixed Part A.
(3) Thoroughly mix the two parts until a uniform consistency and color is obtained.

Clean Up Solvent
Acetone, Toluene, Xylene

Limitations
Apply when the air and surface temperatures are above 60°F . Surface temperatures must be at least 5°F above the dew point. For optimum application properties, bring material to 70-90°F prior to mixing and application. Increased temperatures will result in shorter pot life.

Application
Airless spray equipment with minimum 60:1 pump ratio @80-100 lbs. to achieve 2500-3000 p.s.i. tip pressure. Reverse-A-Clean tip .019 to .023, with 3/8" fluid hose, 1/4” by 6’ whip hose, with a maximum of 100 linear feet. This coating is a low VOC compliant material. If shop conditions require a viscosity adjustment, thin with Xylene or Toluene.

Cure Time And Temperature
Forced Hot Air - electrically heated air or propane or natural gas combustion heated air only. 6 hours at minimum 250°F (122°C)
All temperatures are substrate temperatures.
Contact APC for detailed heat cure requirements.

Coverage
Practical at recommended film thickness (12-14 mils DFT) - 75-80 square feet per gallon.

Handling Precautions
Solvents and chemicals are contained in this product. Consult the Material Safety Data Sheet for details. Adequate safety and health precautions should be taken during handling, application and drying of this product. The material should be applied under local, state, federal regulations and in accordance with OSHA and ANSI bulletins on safety requirements.

Packaging
Available as:
5 gallon (19 liters) kit with catalyst
1 gallon (4 liters) kit with catalyst

(See full Specification for Application of ChemLine 784/31)

A History of Performance
For more than two decades Siloxirane (now ChemLine) has withstood the tremendous stresses and extremes of chemical attack and abrasive wear. Siloxirane coatings and linings have been proven worldwide under the most arduous operating conditions, from resisting the most aggressive chemicals to handling hot pipelines in sub-freezing temperatures, Siloxirane coatings have a history of success. Based on this experience, the development of ChemLine 784/31 represents a Quantum Leap in chemical resistant polymer coatings.

Add to Your Profits — Specify ChemLine 784/31
For the full story on ChemLine, contact APC or click onto our web site at www.adv-polymer.com for the most versatile, technologically advanced and cost effective protection available.

The furnishing of the information contained herein does not constitute a representation by Advanced Polymer Coatings, Ltd. (APC) that any product or process is free from patent infringement claims of any third party, nor does it constitute the grant of a license under any patent of APC or any third party. APC assumes no liability for any infringement which may arise out of the use of the product. APC warrants that its products meet the specifications which it set for them. APC DISCLAIMS ALL OTHER WARRANTIES and relating to the products and DISCLAIMS ALL WARRANTIES RELATING TO THEIR APPLICATION expressed or implied INCLUDING but not limited to warranties of MERCHANT ABILITY AND FITNESS for particular purpose.

Receipt of products from APC constitutes acceptance of the terms of the Warranty; contrary provisions of purchase orders not withstanding. In the event that APC finds that products delivered are off-specification, APC will at its sole discretion, either replace the products or refund the purchase price thereof. APC’s choice of one of these remedies shall be Buyer’s sole remedy. APC will under no circumstances be libeled upon for consequential damages except in so far as liability is mandated by law. APC will deliver products at agreed upon times in so far as it is reasonably able to do so, but APC shall not be liable for failure to deliver beyond its reasonable control.

Product covered under one or more of the following patents or patents pending. 5,169,912 5,658,996 5,874,501