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ChemistryGlue and AdhesivesPlastics and Polymers
I found this… thought it might help (look on the left under Web Links to find the original source page from EpoxyProducts.com):
Epoxies yellow, chalk (or more commonly least lose their gloss), in direct sunlight (UV). The yellowing can be a real problem. For pigmented epoxies select colors that are dark or contain a lot of yellow (such as green). Even clear epoxies will yellow and cloud up. Often epoxies are topcoated with latex or urethanes that will retain their color and attractive gloss. This is particularly true if color coding or matching company colors is important.
There are special epoxy formulations that have increased chemical resistance, increased temperature resistance, the ability to be applied underwater, and enhance resistance to yellowing and UV damage.
Another clue of a cheap epoxy is if it requires haz-mat shipping. Generally the better resin systems can be shipped non-haz-mat. The exceptions are special high temperature and/or more UV resistant epoxies, which often require haz-mat shipping.
I also found this at E-poxy.com (again, link on the left):
The primary disadvantage common to most epoxy systems is poor UV resistance. UV light can lead to chalking (yellowing) and loss of gloss. Although the strength of the epoxy will not be compromised, the material is no longer aesthetically pleasing.
34 peoplefound this usefulWhere can you buy clear casting resin epoxy in New Zealand?New Zealand Fibreglass Showroom & Factory: 109 Morrin Road, Panmure, Auckland, New Zealand Postal Address: P.O. Box 14-174 Panmure, Auckland 1741, New Zealand Model Crafts and Hobbies PO BOX 11-227 Wellington New Zealand Phone +64 4 801-8767 Fax +64 4 801-8942 Email .nz See Related Links, below, for website.What is resin?Resin is a natural or synthetic compound which begins in a highly viscous state and hardens with treatment. Typically, resin is soluble in alcohol, but not in water. There are a number of different classes of resin, depending on exact chemical composition and potential uses. There are numerous applications for resins, ranging from art to polymer production, and many consumers interact with products which contain resin on a daily basis. Natural resin comes from plants. A classic example is pine sap, which has the characteristic sharp odor of terpene compounds. As anyone who has interacted with pine sap knows, the substance is very viscous, but it hardens over time. A number of other plants produce resins, and plant resins have been used by humans for thousands of years. Some plants exude a similar substance called gum or gum resin which does interact with water. Gum tends to be softer and more malleable than resin.What is epoxy resin cast transformer?The epoxy resin cast transformer steps up or steps down voltage.The epoxy resin cast transformer generally generate low noise andare very cost efficient. They are also resistant to failure ascompared to the other types of transformers.How do you make epoxy resin at home?2-part epoxy resin is available at hardware and craft stores. An example brand is EasyCast. You mix 1 part resin to 1 part hardener and pour into a mold-either silicone or store-bought resin molds. Allow it to cure (harden) for 24-48 hours. Always wear gloves and work in a well-ventilated area. Epoxy resin sold for home use is as safe as any other odorous substance such as paints and glues–if you use the proper precautions. Epoxy resins for home use are usually utilized in jewelry making, accents such as handle pulls and door knobs, or as a coating on other objects such as tabletops with coins embedded in them.Where to find epoxy?The epoxy coating is one of the flooring surfaces. You can findepoxy from your local store.What are resins?It can be the hydrocarbon secretion of many plants , these are such as rosin, shellac, damar, copal, but their are a multitude of synthetic ones; phenolics, acrylics, alkyds and plastics in general. These vary in structure from soft to hard brittle, depending on their molecular weightWhat is the mold temperature of epoxy resin?The mould temperature of epoxy resin is very much dependant on the type of epoxy.. some resins cure at ambient temperature, some have to be cured at temperatures up to 180ÂºC/350F. This should be on the product documentation. Generally, the higher the cure temperature, the higher service temperature is allowed.What is the curing temperature and time of epoxy resin?if you mean for epoxy powder coating, the normal curing temperature is 200 cercius and 10 minutes.. or you can refer table below. 5 minutes at 399Âº F 10 minutes at 375Âº F 15 minutes at 320Âº FWhat does low voc epoxy resin mean?VOC is volatile organic compound. Typically low voc refers to compliance with an environmentally friendly standard.We want to cover a greenhouse frame with UV-resistant polyethylene but dont want to hinder growth potential in the plants so do UV rays help or hinder plant growth?UV resistant polythene should not hinder plant growth, UV resistant refers to the material itself, if it is not UV resistant it will discolor and become brittle over time.Properties of phenolic resin why we prefer phenolic over epoxy resin?Phenolic resin is less costly and easier to work with than epoxy. Many epoxy resin systems have a very short pot life.How do I clean an epoxy resin floor?FLOOR MAINTENANCE AND GENERAL HOUSEKEEPING .. If regular care is provided and recommended guidelines observed, the decorative appearance and life of all Epoxy Products Flooring Systems will be extended.. i) Care Immediately after Installation. The new flooring system should be allowed to fully cure before being used.. The following perimeters apply -:. Careful Foot traffic – 24 hours at 20ÂC, 48 hours at 8ÂC. Full Mechanical and Chemical Loading – 7 days at 20ÂC, 14 days at 8ÂC. Washing with water must not occur until the curing cycle is completed i.e. not within 7 days.. ii) Cleaning. Cleaning regularly is necessary to maintain the appearance and prolong the life of the flooring system.. Our General Purpose Cleanser is an ideal product for epoxy resin floors.. The use of Washer Scrubber Dryer machines incorporating the recommended. cleaners would be the best, most effective method of cleaning the floor.. Abrasive cleansers must not be used.. Acid based cleansers must not be used.. Strong alkali based cleansers must not be used in concentration form.. Solvent cleansers must not be used although some solvent activated cleansers are suitable.. Scraping of the surface should be avoided however plastic scrapers or squeegees with rounded corners are more gentle to the floors surface.. iii) Polishing. Having washed the floor the application of approved clear polymer glaze coats or wax polishes are recommended to protect the upper surface from minor scratches and abrasions.. Wax modified cleansers will provide improved scratch resistance.. The metallic polishes will provide immediate protection and we recommend three or more coats are applied following a maintenance washing. Three or more coats can easily be applied in one day. Having done so repeated applications of polish should be made every three months.. iii) Accidental Impact Damage. We advise contacting Epoxy Products Contracts Division as soon as possible to ensure remedial measures can be effected in order to retain the performance of the Epoxy Coating system and prevent water or chemical ingress into the damaged area.. iv) Accidental Scratch or Scoring Damage. Should the flooring surface become scratched or scored by abrasive materials then we would immediately recommend the surface is cleaned with an approved cleanser and an approved polish or glaze coat is applied to the surface. This will protect the floor from further minor scratches. Repeat applications building up the thickness of the polish or glaze coat will provide improved scratch resistance.. v) Spillages and Deposits. Regular sweeping and cleaning is advised as dirt and dust are abrasive and can prematurely age the surface. Spillage of chemicals i.e., petrol or oil should be cleaned up immediately as with all good cleaning procedures.. After chemical spillages, certain chemicals may cause some colour changes. This usually is caused by a surface reaction only and will not impair the mechanical performance of the flooring system. If in doubt, contact Epoxy Products Technical Services Department for assistance.. Cleaning Methods . i) Hand Cleaning. The floor can be cleaned by the use of a mop and bucket using our approved cleanser.. It is important the floor is finally rinsed with clean water to avoid smearing contaminated water across the floor. The main problem associated with this cleaning method is drying the floor effectively without allowing contaminated water to puddle upon the surface and leave a dirty smear effect when dry.. This method of cleaning is normally only recommended for cleansing small areas of localised spillage.. ii) Washer Scrubber Dryer Machines. Technical advances in floor maintenance equipment over the past decade has provided industry with low cost, highly efficient machines applying low foam cleansers with vacuum suction drying.. The use of these machines is recommended as being the most effective method of cleaning floors with minimum disruption.. iii) Wet Vacuum Pick Up Machines. Having washed the floor with copious amounts of water and cleanser the floor can be dried efficiently by passing over the area with a Wet Vacuum Pick Up Machine. These machines will dry the floor extremely well leaving a clean dry surface.. To achieve best results final rinsing with cold clean water maybe necessary to remove and pick up any fine sediment of dirt that remains upon the surface.. iv) Power washing. A highly effective method of cleaning but difficult to control and to remove the large volumes of water left upon the floor. Should the floor levels be variable then water puddles maybe created and difficult to remove. If this should occur then the problem of dirt sediment as mentioned above may result.. v) Steam Cleaning. The use of a steam cleaner is not recommended for this particular flooring system. Excessive heat shock may cause swelling, blistering and subsequent adhesion failure to this flooring system.What is the resin?A resin is a viscous compound that is naturally produced by plantsbut can also be synthetically created. It is insoluble in water andhighly flammable.What is the density of epoxy resin?it has no fixed density of itself.But when added with some external material then it s ranges from 2g/cm square to 11g/cm square….. For whatever reason, mass density is not commonly listed in physical properties of epoxies. An Abelstix formulation I use has a density of 1.36g/cm3.Is 2 part epoxy resistant to gasoline?The short answer is Generally, yes, after it cures completely. If you are going to use epoxy in a non-critical place where it may occasionally be exposed to fuel for a short time, you are probably safe as long as you make sure that the area is fuel free until after the epoxy cures. If the application is safety-critical or if the exposure is continuous, you should talk to the epoxy manufacturer or vendor before proceeding. The problem is that there are many types of epoxy resins and hardeners and additives. (Browse around at resins.com.) Not all are resistant to gasoline. Likewise, there are many different formulations of gasoline with many different additives, and some may attack epoxy more vigorously than others. Finally, there are a lot of regulations associated with fuel systems and tanks. Depending on what you want to do, this could be important. Here is a document published by the makers of West System epoxy which addresses tank (including fuel tank) construction using epoxy: I personally used fiberglass with West System epoxy to patch a hole in a motorcycle fuel tank. This was a continuous exposure type of application, and it worked fine for several years. After that I sold the bike, but the patch area still seemed solid and it definitely didnt leak. Good luck.What does 6litres of epoxy resin weigh in kilos?That would depend on the weight per liter of the resin youre using. You dont have enough information in your question to help us provide an answer.When would epoxy resin glue be used?Epoxy or polyepoxide is a thermosetting polymer formed from reaction of an epoxide resin with polyamine hardener. Epoxy has a wide range of applications, including fiber-reinforced plastic materials and general purpose adhesives.Can you cast resin or epoxy in a Plaster of Paris mold?Yes, but the method for making sure the material separates from the plaster mould is quite involved. Some mould makers use shellac, followed by a soap treatment. There are several steps to the process, and you will probably have to destroy the mould as you break the positive out. For detailed steps on how to do this, research plaster waste mouldsYou are using envirotex lite an epoxy resin and polyamine hardener and you us it on bottlecap jewelry Some of the pieces come out sticky What should you do?It dries sticky if you do not mix them as well. Sometimes if you do not really scrape the sides and bottom of your mixing container you get this result. You can re-pour those pieces if there is enough room in the bottle cap. If you have spots that are mushy make sure you hollow those out and sand with fine sandpaper before re-pouring. Hope it helps:)Is styrene UV resistant?The pure polystyrene is not resistant to UV radiation – yellowing effect in time. But a polystyrene with antioxidants as additives can resist much; this type of polystyrene is named light-stabilized.How do you apply epoxy resin and varnish to a boat?Heres what DIY Wooden Boat website has to say: Maintaining your Boat Varnish. To keep boat varnish looking smart requires regular maintenance. UV rays (sunlight), is the major cause of damage to a varnished finish. All good quality marine varnishes contain UV blockers. Unfortunately these do eventually break down allowing the UV light to penetrate to the base layers. And when it does the base coat will begin to deteriorate and start to separate from the wood leaving you with those horrible opaque blisters. Once the varnish has reached that stage the only option is to strip it all off and start again. To avoid this happening you need to renew the UV protection by regularly sanding back and replacing the top coat. How often this needs doing will depend on the amount of sun it is exposed to, generally once in the spring then again at the end of the season should be sufficient. Not only will this top up the UV protection but it will fill up any scratches or cracks and your varnish will get better looking every year. And filling those scratches will prevent moisture from getting underneath the base coat which will also damage the varnish to wood bond. Here is a quick rough guide to when your varnish needs freshen up.ââGive it a good wash, then when it is still wet the water should form beads on the surface.ââIf the water forms sheets or flattish streaks its time to re-do that top coat. Even where you are merely touching up sound boat varnish, the surface must be sanded to provide a key so the new varnish will adhere well. Varnish should always be sanded with a fine grit, 150 or less, a course paper will leave scratches which will be impossible to hide. For boat varnish work, always sand along the direction of the grain of the wood and not across it, so it really needs to be done by hand. Where old varnish is lifting, blistered or has flaked it is better to take it all off and start again than to try to patch it up. Start off with a long handled scraper, this is the type of job they are designed for. If there is a lot of thick varnish to be removed you could resort to a hot air gun and a hook scraper or if you are feeling brave a blow torch. I have found that chemical strippers are messy, hazardous to use and work out quite expensive, Id rather take my chances with a blow torch. Once you have got the old varnish off, or if you are starting from bare wood you then need to give the area a good sanding.Specific heat capacity of Epoxy resin?Specific heat capacity of epoxy resin depends on chemical structure of epoxy resin and range of temperature of measurements. Usually at 25 deg.C specific heat capacity of epoxy resins is 0.8-1.2 kJ/(kg*K). The specific capacity is growing with temperature, roughly increasing 1.5 times by 100 deg.C.How is Epoxy resin made?Firstly at 50âC in a conventional reactor, mix the reactants (epichlorohydrin and bisphenol A) under a molar ratio of bisphenol A to epicholorhydrin 1:14, then raise the temperature to 115âC over a period of time of 30 minutes. Conduct this reaction under a nitrogen gas environment. Secondly add an alkaline catalyst (2 moles of NaOH), as 30% aqueous solution, drop wise. This usually takes several hours. The rate of addition is maintained as such the reaction mixture does not change the colour when phenothalein (an indicator) is added. Thirdly carry out the reaction for an additional 30 minutes and then wash out the excess catalyst. Next raise the temperature to 130âC and remove water by decanting (The remaining liquid is dried with anhydrous sodium sulfate or other dessicant) Lastly remove excess epichlorohydrin by vacuum distillation.What is a cheap but good filler to add to epoxy or polyester resin?Talc us an excellent filler providing much bulk and sanding very easily. A cheap source is generic baby powder. Just check the ingredients are talc, not corn starch.Is epoxy resin food safe?Generally yes. The interiors of food cans are coated with it. See related link for more information.Does epoxy resin use for countertop of kitchen as a solid surface if no why?Does epoxy resin use for countertop of kitchen as a solid surface if no why?What type of plastic is epoxy resin?Epoxy Resin is a Thermosetting plastic its used to make glues e.g Araldite( which sticks most things) and Aerolite (waterproof wood glue !What is the value of Youngs modulus for epoxy resin?Epoxy resins have been quoted as having values of Youngs modulus in the range of 2-20 GPa. A,B A Ogorkiewicz, R. M. (1973) Linear elastic characteristics of a cast epoxy resin. T he Journal of Strain Analysis for Engineering Design . Vol. 8 , No. 2, pp. 132-133. B Rice, J. A. and Rice, A. C. (2009) Youngs Modulus and Thermal Expansion of Filled Cyanate Ester and Epoxy Resins. IEEE Transactions on Applied Superconductivity . Vol. 19 , No. 3, pp. 2371-2374.Is an epoxy a composite?No. But it can be made into a composite by adding glass, carbon, or kevlar fibers, among other things.What happen when epoxy resin and cement is mix together?It would create a very sticky and strong string almost but it wont hold in like vertically for more than an hour unless it had a stable base underneath it. If used horizontally, it could probably be used inappropriately, or for the wrong use; i.e. robbing a bank, creating a major car accident. This substance might be good for reparing cracks or other houdehold needs.How does resist a epoxy coated tank from salt water reaction?Epoxy is a near perfect water barrier. This applies to salt water as well. As the epoxy coated tank and the salt water does not contact, the corrosion does not occur.Where can you get epoxy resin adhesive sprays at?Epoxy resin is a 2 part adhesive, so there can be no sprays as a spray only contains one substance.What is stiffness of epoxy resin?It depends on the resin; most exhibit a Youngs modulus between 100,000 and 1,000,000 psi at room temperature.Is polyurethane epoxy a resin?Polyurethane isnt epoxy, but theyre both resins. Theyre also both reaction copolymers–you get either one through a chemical reaction between two components. The difference is, epoxy contains epoxide and polyamine; polyurethane contains a complex alcohol (either a diol or a polyol) plus an isocyanate.Which paint colors are uv resistant?First, use the best paint you can buy with the best 100% acrylic resins. When mixing house colors, normally the more earthy tones are the most UV resistant ones. When you have the paint made, ask the counter person to formulate the paint using organic colorants, vs synthetic ones. Keep in mind though, that no matter what color you use, paint will fade over time. Using the organic colorants ensures that the paint fades slower.What is a metal epoxy?A metal epoxy is an epoxy that will glue matals. Two good ones are J B Weld and Pow-R-Stick.What silicone is UV resistant?All silicones are UV resistant. Silicones are synthetic compounds of varies forms. Silicones have many different uses because there are so many different kinds.What is aliphatic epoxy?Aliphatics are two-part urethanes that are extremely durable, highly resistant to UV degradation (unlike an epoxy) and very color stabile. They are best used for exterior applications where a long-lasting and protective finish are desired.Is super glue quick set epoxy resistant to gasoline?No. Seal-All is a super glue type that is resistant to gasoline. Available in Home Depot.Is epoxy resin a thermo plastic or thermosetting plastic?epoxy resin is a thermosetting plastic this is due to the ammount of THC cheeers peace love and nugsWhat products can be made from epoxy resin?Epoxy Resin is a wonderful product. It can be used in just about any kind of home improvement and everyday items, and so it is all around us. It can be in your paint on your walls, it can be used as an adhesive, even inside your electrical items such as your mobile phone. Basically, epoxy resin is fantastic.Is there a resin resistant to chlorine?Not answering your Q directly, but PTFE was formulated to resistchlorine attack on process vessels. This may give you a startingdirection.Would putting epoxy resin in the refrigerator affect its rate of curing?Yes, indeed. Epoxy resin cures by chemical reaction. Any chemical reaction is speeded up when you heat it, but when you cool it in the fridge, the reaction slows way down!Is epoxy a thermoplastic?Epoxy resin is available as a thermoplastic – but it is rare. Epoxy resins are classed as THERMOSET polymers – not thermoplastic.Can you repair your sink with epoxy resin?That depends on what material and the extent of the damage. If you think its possible to do then its certainly worth a try. I would choose the epoxy very carefully, look for one that sets clear if visibility is a factor, and also adapts well to wet conditions. I recently tried one called Wet-Bond which claimed these attributes, but it was a disappointment. I would pick one of the products from Loc-Tite or Devcon.Can you use epoxy resin to fix a dental plate?Without knowing the exact epoxy you want to use I would say no; some epoxies are extremely toxic when they are cured.How can i do a DIY fix on a punctured oil drum using metal mesh pliable tiles plus a metal grade heat resistant epoxy in order to keep the oil from leaking?You can do a DIY fix on a punctured oil drum using metal mesh,pliable tiles, and a metal grade heat resistant epoxy in order tokeep the oil from leaking with the aid of a mechanic.What is epoxy resins in briefly?Epoxy resins are advanced thermosetting resins used in FRPcomposites. Epoxy equivalent of an epoxy sample is determined by astandard titration method  using hydrogen bromide solution inacetic acid.Can i use epoxy resin to seal crack in plumbing pipe?You can use epoxy resin to seal large holes or cracks in plumbingpipes because it is impervious to water and oils.Why is epoxy strong?Two ways epoxy can be strong. 1 Chemically Epoxy is a class of substance acquire by polymerization fromepoxides. Epoxies are used mainly in adhesives and coatings. 2 Physically(Physically: Physically epoxy coating systems containtwo elements, resins and hardeners. The resin component is usuallylight, sometimes almost clear colored, and almost odor free) I like epoxy floor because it is durable and long-lasting.If youwant to apply epoxy on your concrete contact your local epoxyinstaller.ASK A BRAND
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