UV Curable Peeling Coatings

UV Curable Peeling Coatings

UV Curable Peeling Coatings

Introduction: UV Curable Peeling Coatings

UV_Peelmask is an economical one component, UV cure masking resin that simplifies your process by offering fast, reliable protection for your parts. No measuring or special mixing required.

UV Light curing material UV_PeelMask from General Chemical offers tremendous benefits to thousand of companies worldwide to assemble and protect their parts. Some of this industries are Aerospace, Appliance, Automotive, Electronics, General Industrial, Medical Equipment, optical, Telecom and others.

The widely used traditional masking products in today’s masking( temporary protection) application include lacquers, tapes, waxes and reusable boots and plugs. These masking products are not generally expensive but masking process itself can significantly increase cost to product protection operations. The longer it takes to apply and remove these traditional masking materials, the higher the cost of masking processes can be expected. Labor is major contributing factor to cost other hidden costs are also associated with using these traditional surface protection materials. To overcome these problems, General Chemical Corp. has developed new UV curable temporary masking products as a solution.

1. Can it be applied over UV finishes. Yes providing the finishes are fully cross linked.

2. Product Specifications –

  • Pot Life – Minimum 6 months providing product kept in darkness. Our UV coatings are one package coatings.
  • Viscosity – 40-60 seconds on zaku cup #3
  • Application in roll coaters – May be suitable at this viscosity however we can increase viscosity if necessary to accommodate.

3. Energy Required for curing : our laboratory testing is done using:

  • Wave spectrum – 200 – 400 nanometer wavelengths
  • Power requirements and line speed – 300 watt mercury bulb at 25 feet per minute.

4. Cost per square foot – per square foot based on 5 mil application.

5. Thicknesses that can be applied and the requirements for cure – 5 mils for optimum peelability.

6. Chemical Toxicity (MSDS) – 100% non-volatile

7. Adherence (tack) level to other coatings. Dependant upon coating or substrate. We formulate for various applications.

8. Viability in extreme conditions (sub-zero to 120? F conditions with humidity) – No problem.

9. Supply Availability: local distribution and volume needs. We manufacture and distribute directly from our plant in Detroit, MI. We can accommodate volumes of quart and gallon trial size, 5 gallon pails, 55 gallon drums.

Description: UV Curable Masking Adhesive Resins, UV Curable Peelable Coatings, Light Curing protective Maskants

The growth in Ultraviolet (UV) curing in the past 20 years has been phenomenal and as a result has become an established industrial process. UV-curable masking originated and commercialized in the 1980’s, resulting in millions of dollar cost saving.

The Principle of UV Curing and Advantages of UV Curable Peelable Coatings

In UV curing, a reactive, low viscosity and usually solvent free coating is applied to the substrate and made to polymerize by exposure to UV-light. UV curable Peelable coatings are one component systems which typically consist of: acrylate oligomers, acrylic monomers, reactive diluents, photoinitators, additives and modifiers. The main types of acrylate oligomers used are: epoxy acrylates, polyester acrylates and polyurethane acrylates. These oligomers provide the characteristic basic properties to the resulting coating. Photo initiators are a very important component of the coating composition. The role of the photo initiator is to begin the free radical polymerization (curing) process when the coating composition is exposed to the proper irradiance UV light from a medium pressure Mercury lamp (primarily UVA & some UVC wavelengths; 315-400 nm and 200-280 nm). Various additives can be used to enhance coating properties such as wetting, surface leveling, flow rate, color etc. Modifiers can increase durability (impact & crack resistance) of the UV Peelable coatings.
Through careful raw material selection, UV cure coatings formulators can more easily manipulate physical properties, such as chemical and weather resistance as well as mechanical properties, such as tensile strength and elongation. Controlling these properties enables the formulator to create customized Peelable coatings that meet specific performance criteria for each application. In addition to performance benefits, UV- curable Peelable coatings provide processing advantages over traditional solvent borne and water based technologies. First because these UV curable coatings contain no solvents, volatile organic compound (VOC) emissions are in compliance with EPA regulations. UV curable, Peelable coatings also cure much faster than solvent borne/water borne counterparts because there is no solvent or water to remove; these are 100% reactive systems. In fact the curing only takes a few seconds, making UV curable coatings a particularly economic method by; speeding production masking times, reducing labor costs and increasing profitability. The properties of UV cured Peelable coatings are far superior to those of other systems. The UV curing mechanism involves free radical polymerization. Di-functional and poly functional compounds in the formulation crosslink into tough, durable cured films.

Benefits

Advantages of UV Curing 100% Reactive Solids (no solvent)

  • No decrease in thickness
  • High Chemical Resistance
  • Rapid Cure (processing rate ~ 2 m / s
  • Low Temperature (T<50°C
  • Low energy consumption
  • Reduced process area and equipment

Advantages

Advantages of UV curable masking coatings over conventional masking products can be summarized in the following list of advantages:

  • Superior Film Properties (thermosetting, mechanical, chemical)
  • Good Cost/ Performance
  • Much Faster Cure (take seconds to cure)
  • Significantly shorter application (masking) time and significantly increased production cycles
  • Worker and environmentally friendly- no solvents and little to no VOC emission.
  • Minimal Capital Investment
  • Space saving installations
  • Dispensing can be automated
  • Coating may be applied by dipping, spraying, screen printing or pad printing
  • Little heat applied to substrate
  • Curing is not dependant on temperature/humidity condition of environment

Application: How Do UV PeelMask Work?

The UV light curing process begins when the photo initiator in the mask is exposed to a UV light energy source of the proper spectral output. Its molecules split into free radicals (initiation). Which then begins to form polymer chains with ingredients (Also known as propagation). This continues until all of the ingredients have formed a solid polymer (termination). What was once a liquid, is now a solid Peelalbe resin film.

All of the components in the UV curable system react and form the polymer coating network. Therefore 100 percent of the applied coating remains on the substrate once the coating is cured. No VOCs are emitted after cure and the coating is termed environmentally friendly.

 

Patch Test:
Because it is difficult to determine the type and condition of the surface, perform a small patch test first. It will determine the peel ability of the coating on your particular surface, it will define the coverage and the approximate amount of time required for it to work and to remove off of surface. We offer no implied or other wise a warranty for our products.
UV_PeelMask masking resins are a line of light curable temporary protection used in surface preparation and finishing operations where a barrier is needed to protect surfaces and cavities. These masking resins offer reliable protection during the following processes. UV_PeelMask is far superior to traditional masking process. We will custom engineer a solution to meet your process requirements.

Curing

COMPONENTS OF UV CURING SYSTEMS

UV light is part of the electro-magnetic spectrum and is generally between 200 and 400 nanometer wavelengths. The ultraviolet lamp bulb is the source of UV light and it is a very important component of UV curing system. The role of UV light with sufficient energy is to initiate a polymerization of photo reactive components (oligomers and monomers) of coating in presence of photo initiator. Industrial UV lamps produce energy across the full spectral range of the optical region. Several types of UV light bulbs with output intensities as high as 120 watts/centimeter (600 watts/ inch) are available. Type and intensity if the UV bulbs, component configuration, production capacity, the mature of the processes and the shape of the substrates and costs are major factors which play role in selection of appropriate UV curing system. All reputable suppliers of ultraviolet light radiant energy equipment rely on some basic components such as:

  • The light source (typically a tubular glass bulb) medium pressure Mercury lamp
  • A power supply to energize the bulb
  • Shutter system to prevent light from hitting a target
  • Cooling system to remove heat from the lamp area
  • Reflector systems to focus or diffuse the light
  • Safety shielding to prevent UV-light being emitted into the workplace and protect operators
  • System to transport a coated parts- a conveyor system
  • All well designed UV light sources are houses in units which prevent
  • UV light from reaching the workplace and preventing possible problems of eye exposure to the UV light.

 

Removal: UV_PeelMask masking resins are available in burn-off, peelable, and water soluble grades. The resins are easily removed and leave the surface residue free. Probably most widely used UV cured protective coating is Peelable type coating. UV curing which cure in a few seconds provide durable and cross-linked films with sufficient adhesion for surface protection objects during handling, storage, transportation, and in manufacturing operations such as machining, acid stripping, solvent cleaning etc. UV curable Peelable coatings are easily removed manually or help of non abrasive tool. Typically removal of coatings starters by lifting up of edge and than peeling of complete coating in one piece rather than in fragments. The peeled coating is basically cross linked plastic and non hazardous film which can be disposed of according to local regulations for waste plastic materials.

Coverage: UV cure peelable coatings are applied at between 5mils to 15 mils. More common would be between 5 mils and 10 mils. At 5 mils the coverage area is 12,200 square inch/ liter (84.7 square ft./liter) or 46,177 square inches/gallon (320.6 square ft./gallon). At 10 mils the coverage area is 6,100 square inches/liter ( 42.4 square ft./liter) or 23,088.5 square inches/gallon (160.5 square ft./gallon).

Storage: It is recommended that temperatures of 13 degrees C – 32 degrees C (55 degrees F- 90 degrees F) should be used within one year of purchase. should be stored in the original shipping container in indoor environment. Containers should be sealed until needed. Protection from freezing is necessary.

UV Peel Protect

TDS
Product
Color
TDSUV 721
TDSUV 730
TDSUV 731
TDSUV 732
TDSUV 737
TDSUV 1006
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