0
When polyurethane is exposed to chlorine, it can undergo a chemical reaction that can result in degradation of the material. This reaction can lead to discoloration, embrittlement, and reduced mechanical properties of the polyurethane. It is important to avoid exposing polyurethane to chlorine-containing substances to maintain its integrity and performance.
2 answers
Some polyurethane paints do offer UV protection, but not all of them do. It's important to check the specific product label or contact the manufacturer to confirm if the polyurethane paint you are using provides UV protection. UV protection helps prevent the paint from fading and deteriorating when exposed to sunlight.
1 answer
I recently painted my land rover using polyurethane paint with rollers. Tho I say so myself I was very pleased with the result. Colin
2 answers
You may never see it, but chances are you come into contact with polyurethane foam quite a lot during the day! 75+% of all polyurethane is used to make foam and this foam is used in a large variety of places.
Two different types of polyurethane foam are produced. Both are low density, but one is flexible and soft and the other is rigid. Flexible polyurethane foams are used for padding in domestic furniture such as couches, chairs, and recliners, as well as being used for commercial furniture such as office chairs. It can also be used for bedding objects; pillows are commonly stuffed with polyurethane foam. When placed in between the layers of a quilt, it is useful in helping supply padding and extra warmth. Many vehicles have their seats padded with polyurethane foam underneath the fabric, leather, or other material that is visible on top. On a more limited scale, it is used by clothing designers for such things as shoulder pads and in the lining of bra cups. It is quite likely that at least one item in every home has some sort of polyurethane foam inside of it that is never seen by the users of the item.
Rigid polyurethane foam also has a wide variety of uses that keep it away from the eyes of product users. The most common of these uses is as an insulation product. One example that nearly everybody should be familiar with is a refrigerator. Polyurethane foam is what lies beneath the surface of the metals, plastics, or other materials that most refrigerators are made out of, and it is what keeps them so well-insulated. The construction industry also considers polyurethane foam an invaluable tool when creating insulation inside homes and new buildings being constructed. Another application of rigid polyurethane foam is in the creation of building items such as columns, window headers, moldings, carpet underlay, and door seals.
Every day new uses are found for polyurethane foam. The electronics sector is currently developing products which use rigid polyurethane foam parts instead of parts created with hard plastics. Polyurethane foam remains a not often seen champion for the many industries that use it.
1 answer
Polyurethane foam is a chemically produced material that exhibits highly resilient qualities. It is commonly used for production of both flexible and firm items, including foam for seating, insulation panels, bushings, gaskets, seals, Spandex fibers, and hard plastic parts. It was originally the brainchild of German chemist Otto Bayer and others in 1937. Development of finished products was delayed due to the interference of World War II, and polyurethane foam again resurfaced for development in the early 1950’s.
A new product called “imitation Swiss cheese” became commercially available when inventors accidentally allowed water into the reaction mix. DuPont Company, BASF, and Dow Chemical brought more polyurethane foam to the commercial markets by 1957, and the automotive industry began using firm polyurethane plastics parts thereafter. Over the next two decades, automotive applications using polyurethane foam increased, eventually resulting in all plastic cars.
The introduction of blowing agents created capabilities for spraying polyurethane products on parts and in molds, thus expanding its use and popularity. Some economic advantages over other materials quickly boosted the development and use of polyurethane foam into many areas of industry. It is used now for coating large areas such as concrete and steel structures, tunnels, tank liners, and recently for creating spray-in-place load bed liners that are found on pickup trucks and other cargo areas.
With a desire to produce this product using green technology while cutting costs, new polyurethane foam and products are being produced using environmentally friendly natural vegetable oils. By 2007, worldwide consumption of the raw materials used to make polyurethane foam reached over 12 million metric tons. Continued popularity of these materials keeps current annual production growth rates at around 5% per year.
The uses of polyurethane foam are myriad. Furniture foam, packaging foam, bedding, underlay for carpeting, vehicle interiors, and shock absorption parts are made from flexible or firm polyurethane foam. There are no real substitutes for this material with regard to the benefits of low cost, flexibility, usability, weight and compression resistance. It is a safe product that does not emit volatile organic compounds (VOCs) that might present a health hazard. Its ability to become either a flexible or firm end product greatly extends the range of usefulness of polyurethane foam.
As there are many proprietary products and technologies involved with this product, a good resource for further technical questions is the Polyurethane Foam Association website, for starters. Visit them at: http://www.pfa.org/faq.html.
1 answer
Yes, water-based polyurethane can be applied over oil-based polyurethane after proper preparation and sanding.
1 answer
Yes, you can apply polyurethane over old polyurethane when refinishing furniture. It is important to properly prepare the surface by sanding and cleaning it before applying the new coat of polyurethane for best results.
1 answer
No, it is not recommended to apply oil-based polyurethane over water-based polyurethane as they are not compatible and may not adhere properly. It is best to stick with the same type of polyurethane for a consistent and durable finish.
1 answer
No, it is not recommended to apply oil-based polyurethane over water-based polyurethane as they are not compatible and may not adhere properly. It is best to stick with the same type of polyurethane for a consistent and durable finish.
1 answer
The most effective method for removing polyurethane using a polyurethane remover is to apply the remover to the surface, let it sit for the recommended time, and then scrape off the softened polyurethane using a scraper or putty knife.
1 answer
Definitely, I would never buy a body kit if it wasn't made of polyurethane or fiber reinforced polyurethane.
1 answer
CPI spray is made of Polyurethane Foam. Polyurethane Foam is made by adding water to polyurethane plastics.
2 answers
No, it is not recommended to apply water-based polyurethane over a surface that has been previously coated with oil-based polyurethane. The two types of polyurethane do not adhere well to each other, which can lead to issues with the finish. It is best to stick with the same type of polyurethane for recoating.
1 answer
When applying water-based polyurethane over oil-based polyurethane, the main differences lie in the drying time, odor, and color. Water-based polyurethane dries faster, has a milder odor, and may not yellow as much over time compared to oil-based polyurethane.
1 answer
Polyurethane will kill you if you eat it.
1 answer
no dont be stupid
1 answer
The thickness of the polyurethane may be excessive for this project.
1 answer
No, it is not recommended to apply water-based polyurethane over a surface that has been previously coated with oil-based polyurethane. The two types of polyurethane do not adhere well to each other, which can lead to issues with the finish. It is best to sand down the surface and remove the oil-based polyurethane before applying the water-based polyurethane.
1 answer
Epoxy and polyurethane can be mixed. An epoxy and polyurethane coating system is often used in the marine industry to protect against the weather.
1 answer
The poisson ration of uncompressed polyurethane is 0.5; the poisson ration of polyurethane under compression is 0.39. Reference: "Material behaviour in plane Polyurethane - Polyurethane impact with velocities from 10 to 400 m/sec." Published at J. Phys IV France 7 (1997)
1 answer
Polyurethane may bubble during application due to moisture trapped in the wood surface, improper mixing of the polyurethane, or applying the polyurethane too thickly. To prevent bubbling, ensure the wood is dry, mix the polyurethane properly, and apply thin, even coats.
1 answer
Yes, you can apply water-based polyurethane over oil-based polyurethane, but it is important to properly prepare the surface and follow the manufacturer's instructions for best results.
1 answer
A coat of shellac can be placed over polyurethane. You should use de-waxed shellac if you plan on placing more polyurethane on in the future.
1 answer
Yes, you can apply polyurethane over epoxy as long as the epoxy has fully cured and been properly prepared for the polyurethane application.
1 answer
Yes, polyurethane is heat resistant and can withstand high temperatures.
1 answer
Polyurethane will give a long lasting easy to apply finish. Use a water based polyurethane ans clean up will be much easier. You should get years of wear from a good polyurethane finish.
1 answer
No, it is not recommended to stain wood after applying polyurethane because the polyurethane creates a protective barrier that can prevent the stain from properly penetrating the wood. It is best to stain the wood before applying polyurethane for the best results.
1 answer
Polyurethane can become sticky if it is exposed to moisture or high humidity during the curing process. This can prevent the polyurethane from drying properly and result in a tacky or sticky finish. It is important to apply polyurethane in a controlled environment with proper ventilation to avoid this issue.
2 answers
To protect outdoor furniture with polyurethane, follow these steps:
- Clean the furniture thoroughly before applying polyurethane.
- Apply a coat of polyurethane using a brush or spray.
- Allow the polyurethane to dry completely before applying additional coats.
- Apply multiple coats for added protection.
- Reapply polyurethane every 1-2 years to maintain protection.
1 answer
No, you cannot stain on top of polyurethane for a new finish. Stain needs to penetrate the wood, and polyurethane creates a barrier that prevents this.
1 answer
There is no evidence of a ball been made from polyurethane. There are polyurethane foam balls, but unfortunately no tennis balls.
The process is likely to be the same as a normal tennis ball, the only difference being that the rubber in the ball is replaced by polyurethane.
1 answer
No, you cannot put stain on top of polyurethane for a new finish. Stain needs to penetrate the wood, and polyurethane creates a barrier that prevents this. If you want to change the color, you will need to remove the polyurethane first.
1 answer
Water-based polyurethane is a type of finish used to protect and enhance wood surfaces. It differs from other types of polyurethane finishes, such as oil-based polyurethane, in that it is made with water as a solvent instead of oil. This makes it less toxic, dries faster, and has a lower odor compared to oil-based polyurethane. Additionally, water-based polyurethane tends to have a clearer finish and is more resistant to yellowing over time.
1 answer
Can you put stain in polyurethane to darken the color?
2 answers
Polyurethane typically takes about 24 hours to dry completely.
1 answer
Polyurethane typically takes about 24 hours to dry completely.
1 answer
Yes, you can sand off polyurethane to refinish your furniture.
1 answer
Yes, you can use polyurethane over epoxy for your project.
1 answer
Oil-based polyurethane and water-based polyurethane differ in their application and performance on wood surfaces. Oil-based polyurethane has a longer drying time and emits strong fumes, but it provides a more durable and glossy finish. On the other hand, water-based polyurethane dries faster, has low odor, and is easier to clean up, but it may not be as durable as oil-based polyurethane.
1 answer
To remove polyurethane from brass, you can use a solvent such as acetone or denatured alcohol. Apply the solvent to the polyurethane with a soft cloth or brush, let it sit for a few minutes, and then scrub the affected areas until the polyurethane is removed. Be sure to clean the brass thoroughly afterward to remove any residue.
2 answers
No, it is not recommended to apply water-based polyurethane over oil-based polyurethane as they are not compatible and may not adhere properly. It is best to sand off the existing finish before applying a new one.
1 answer
For applying polyurethane, it is recommended to use a high-quality synthetic bristle brush. These brushes are durable and provide a smooth finish when applying the polyurethane.
1 answer
