Methylene diphenyl diisocyanate, often abbreviated as MDI, is known as an aromatic diisocyanate.

Yes

The Harmonized System (HS) code for toluene diisocyanate is 2929.10.00.

yes u can

Howard E. Momberg has written:

'A comparison of two methods for the determination of toluene diisocyanate in air' -- subject(s): Toluene 2,4-Diisocyanate, Analysis

It is pronounced as "dye-uh-so-sigh-uhn-ate."

Most foam is made from polyurethane.

They start by making polyurethane. To make it, you mix a polyol with a diisocyanate. There are many polyols. There are two important isocyanates, toluene diisocyanate and methylene diisocyanate. (Two other diisocyanates are used to make urethane paint.) The choice of polyol governs whether the foam is hard or soft, and how soft or hard it is.


Next, you mix in a blowing agent. The first blowing agent was water, which forms CO2 in contact with diisocyanate. They don't like making insulating foam with water, because the foam doesn't insulate as well.

Most foam is made from polyurethane.

They start by making polyurethane. To make it, you mix a polyol with a diisocyanate. There are many polyols. There are two important isocyanates, toluene diisocyanate and methylene diisocyanate. (Two other diisocyanates are used to make urethane paint.) The choice of polyol governs whether the foam is hard or soft, and how soft or hard it is.


Next, you mix in a blowing agent. The first blowing agent was water, which forms CO2 in contact with diisocyanate. They don't like making insulating foam with water, because the foam doesn't insulate as well.

Yes, toluene has three isomers: ortho-toluene, meta-toluene, and para-toluene. These isomers have different arrangements of the methyl group relative to the benzene ring.

Spandex polymers are composed of three different monomers. Dialcohol monomers make up the rubbery, soft part of the polymer while diamine and diisocyanate monomers make up the rigid, hard part of the polymer.

The three monomers of spandex therefore are dialcohol, diamine and diisocyanate.

The name apparently comes from "dimer" and "-yl" as in 'alkyl' or 'aryl,' common classes of organic radical functional groups. According to specification, 'dimeryl' is a hydrocarbon with 36 carbon atoms and two radicals. In dimeryl diisocyanate (DDI), isocyanate groups are attached to both functional points of the dimeryl biradical. There is apparently no such thing as "merylic acid".

Two-component polyurethane refers to a type of polyurethane material that is composed of two separate components - typically a resin and a hardener that are mixed together in specific ratios before application. This type of polyurethane often offers excellent durability, chemical resistance, and mechanical properties, making it commonly used in coatings, adhesives, sealants, and foams.

Some of the ingredients in Gorilla Glue are: prepolymerized MDI, diphenymethane-4.4 diisocyanate.

Oh, and of course, Gorillas.

The monomer of polyurethane is a diisocyanate, such as toluene diisocyanate or methylene diphenyl diisocyanate, reacting with a polyol, such as a polyester or polyether. When these two components react, they form a polymer chain that makes up the polyurethane material.

Gorilla Glue is a polyurethane adhesive that typically contains diisocyanate, polyol, and various other additives. It is known for its strong bond and versatility in bonding different materials.

Polyurethane is made through a chemical reaction between diisocyanates and polyols. The reaction produces a versatile polymer that can be used in various applications such as foam insulation, coatings, and adhesives. The specific characteristics of polyurethane can be tailored by adjusting the types and amounts of raw materials used in the production process.

W. D. Woolley has written:

'The production of free tolylene diisocyanate from the thermal and thermal-oxidative decomposition of flexible polyurethene foams'

'Smoke release from wall linings in full-scale compartment fires'

Yes, toluene diisocyanate (TDI) can be harmful to human health if not properly handled. TDI is commonly used in the production of polyurethane foam found in furniture. Exposure to high levels of TDI vapor or dust can cause respiratory irritation, skin sensitization, and other health issues. It is important to follow safety guidelines and regulations when working with materials containing TDI.

The resin used to bond the strawboard is methylene diphenyl diisocyanate. It is compressed with the wheat straw and other organic materials and makes up 3% of typical strawboard. I have heard that compressing wheat straw at high temperatures produces a natural resin that bonds the strawboard but I don't believe it's sufficient for construction use.

NERF is made from a solid, spongy cellular material produced by the reaction of polyester with a diisocyanate while carbon dioxide is liberated by the reaction of a carboxyl with the isocyanate. Polyester resin reacts with a compound while CO₂ is simultaneously released by another reaction. It is this gas that creates open pockets within the polyurethane that, in turn, makes the material soft and light. (from Wikipedia)

You mean like foam rubber and not the foam on a latte, correct? Foam rubber is actually "polyurethane foam" today; they don't make it out of rubber anymore. And when making polyurethane foam, four chemicals are needed.

The first is a polymer polyol. Any chemical that ends in -ol is an alcohol; a polyol has "multiple" (read: hundreds) of hydroxyl groups per molecule. As you'd pretty much figured, these are huge molecules.

The second is 1,4-diazabicyclo[2.2.2]octane. People call it "dabco," and with good reason. I mean, look at the name of this stuff! This is your catalyst.

The third is a diisocyanate. There are two. In the OLD days everyone used toluene diisocyanate. TDI is extremely hazardous so polymer engineers are using more diphenylmethane diisocyanate, which isn't quite as hazardous. The important thing to know about diisocyanates is they are dangerous all the time: they are made out of a chemical warfare agent (specifically, a blood agent) called phosgene, and if heated too much turn into a different blood agent called hydrogen cyanide. Phosgene is so dangerous they're not allowed to transport it even across the street; it must be made at the same factory as the isocyanates. And every company that makes this stuff has to be registered as a chemical warfare agent factory with the United Nations.

The fourth is a blowing agent, which makes it foam up. The first blowing agent, and one still used sometimes, is water. They found out about this by accident: Otto Bayer, who invented polyurethane and was not related to the Bayer family who started the chemical company, got some water into a batch of polyurethane that he was reacting out and was surprised as could be when it turned into foam rubber. Further research proved that adding water to diisocyanate releases carbon dioxide. Carbon dioxide gas is another popular blowing agent.

Helmets - motorcycle helmets, right? - have shells of either fiberglass or Kevlar. The shell uses cloth, resin, hardener and paint. The padding contains polyurethane, which is a "polyol," a diisocyanate and a catalyst plus a blowing agent to turn it into foam. Then there is cloth, polycarbonate for the visor, a little bit of metal...

There is a whole science involved in this but it is basically a 2 component system. 1 side is MDI (Methyl DiPhenylene DiIsocyanate) and the other component is a mixture of polyols (one of which can be sugar such as high fructose corn syrup) , water, and catalyst(s) usually based on tertiary amines. There are also additves added such as cell openers. The 2 components are mixed in a spray gun and they react together to form foam.

There is a whole science involved in this but it is basically a 2 component system. 1 side is MDI (Methyl DiPhenylene DiIsocyanate) and the other component is a mixture of polyols (one of which can be sugar such as high fructose corn syrup) , water, and catalyst(s) usually based on tertiary amines. There are also additves added such as cell openers. The 2 components are mixed in a spray gun and they react together to form foam.

There is a whole science involved in this but it is basically a 2 component system. 1 side is MDI (Methyl DiPhenylene DiIsocyanate) and the other component is a mixture of polyols (one of which can be sugar such as high fructose corn syrup) , water, and catalyst(s) usually based on tertiary amines. There are also additves added such as cell openers. The 2 components are mixed in a spray gun and they react together to form foam.

Adding a few drops of water helps to initiate the polyurethane synthesis reaction by reacting with the isocyanate group to form carbon dioxide gas. This gas creates bubbles that expand the mixture, helping to produce a foam-like structure typical of polyurethane materials.

Mervyn Spencer Doe has written:

'A rough passage' -- subject(s): Biography, British Personal narratives, Childhood and youth, Great Britain, Great Britain. Royal Navy, Personal narratives, British, World War, 1939-1945

Spandex is a synthetic fiber. It is typically made through one of four processes including melt extrusion, reaction spinning, solution dry spinning, and solution wet spinning. Most of the spandex produced is done so using the solution dry spinning method. In the dry spinning method, a macro glycol with a diisocyanate monomer to produce a prepolymer. The prepolymer is then reacted with an equal amount of diamine. The resulting solution is then cured into fibers and forced through a spinneret. Once the solution is passed through the spinneret, it forms strands of liquid polymer which is heated in the presence of nitrogen and a liquid solvent. This forms strands of solid fiber which are bundled together to a desired thickness. The strands are then treated with a finishing agent. For clothing, spandex is often mixed with either cotton or polyester.

Great stuff is made up of Polymeric diisocyanate and polyurethane prepolymers... the Dose makes the poison. If your dog eats about a pound of this stuff hes in for some trouble. However, with just a little bit he should be Okay. The things that really hurt people and/or dogs when it comes to toxicity is things of a strong base or strong acid. Although your body is much more equipped to handle things of high acidity, things of a high basic is what causes extreme damage. Anything else gets flushed out of your system. Although continuous exposure to things that don't show signs of immediate health issues can very well cause cancer in the long run. Great stuff foam is non of the above having a PH level of around zero. Plus, dogs usually like to chew great Stuff scraps rather than ingest them.

Benzene does not undergo a direct reaction with hydrochloric acid (HCl) under normal conditions because benzene is a stable aromatic compound. However, benzene can be chlorinated in the presence of a catalyst such as aluminum chloride to form chlorobenzene, which can then react with HCl to form phenol under certain conditions.

Liquid nail is made of epoxy which is a type of adhesive

- - - - -

There are epoxies on the market, but Liquid Nails construction adhesive isn't one of them.

I looked at the Material Safety Data Sheet for Liquid Nails Heavy-Duty Construction Adhesive. It contains four basic things: a resin to make it stick together, and they don't tell you WHAT resin but it ain't epoxy (because epoxy contains epoxides and polyamines which would have to be listed on the MSDS as they are hazardous in their own right, and they're not on the Liquid Nails MSDS); ground-up stone to make it thick; titanium dioxide to make it whiter than it would otherwise be; and seven different petroleum-based solvents.

The other kind of construction adhesive is polyurethane, which contains a modified diisocyanate and a modified polyol (modified so they can be mixed together and packaged in a tube without hardening; when they're exposed to the atmosphere they harden), and probably also the ground-up rock because uncured PUR is the consistency of honey--not what carpenters are expecting to see in their construction adhesive.

And since this question is also in the Makeup category...the glue for fingernails is cyanoacrylate-based superglue.

Had my chem teacher in highschool grow the PU foam in front of the class, how did he do it? You need four chemicals: A polyol. For foam, glycerin will work. A diisocyanate. A catalyst called DABCO, which has a REALLY long name. And a blowing agent; for this we'll use water. There are two reactions going on here. First is the urethane reaction--DABCO bonds the polyol to the diisocyanate to form the urethane molecule. Then comes the water...when diisocyanate and water are mixed, carbon dioxide is liberated. The little CO2 bubbles are trapped in the polyurethane and make it foamy.

its the breakdown of NO2 and NO3 into gaseous nitrogen N2. When this happens the N2 is released into the atmosphere because it is for the most part unusable by plants and organisms, unless it is submerged in water. When it gets into the atmosphere it acts as a catalyst in the break down of ozone. Now its not typically as wide spread or released in the amounts that CO2 is on a daily basis however since it isn't needed in huge quantities.

Raw materials are basic materials or substances used in the manufacturing or construction of products. They are typically unprocessed or minimally processed materials that are transformed into finished goods through various production processes. Examples of raw materials include iron ore, wood, petroleum, and agricultural products.

Various types of thermoplastics are used in glue guns. The type of thermoplastic depends on the type of gun. Polyoxymethylene, acrylic, polyethylene, ethylenevinyl acetate, and other types of polymers make up the solid glue, when when heated becomes viscous, and re-hardens after cooling.

The term 'asthma' is taken from the Greek meaning ' panting' or 'labored breathing'. Asthma is a condition characterized by a paroxysmal wheezing respiration dyspnoea (difficulty in breathing), mainly expiratory. Asthma is a disease that intermittently influences the lungs. When it attacks, the lungs become infected and the airways slim. The sufferer's chest reduces, breathing becomes difficult or wheezy, and a consistent cough may develop - especially during the night. Asthma can be triggered by allergic reactions or have its starting point from a stressful amount of life such as infection, a grief, or even the birthday of a baby. Thousands die from asthma each year. That is a serious disease that is increasing in frequency. For children and adults alike, they have difficulty to breathe during an asthma attack can be a frightening experience. Whilst conventional medications relieve many of the symptoms of asthma, they can cure it. With homeopathy, it is a different story.

The key Causes of Asthma:

Regarding the etiology, bronchial asthma is broken into the following groups:

1. Sensitive (extrinsic/ atopic) Asthma - This type of bronchial asthma usually starts in child years and is often forwent by eczema. But almost all of the young adults (<35 yrs.) developing bronchial asthma also fall into this category. Genetic factors also play a tremendous role we this. Through this type of asthma, the allergen causes the production of abnormal (IgE) immunoglobulins.

2. Infective or Intrinsic Asthma - This is not genetic or allergic, but may be caused by, or at least associated with an upper respiratory area or bronchial infection which is usually viral.

3. Emotional Asthma - Internal factors (like anxiety, psychological stress etc.) are often considered to be the only cause of some asthmatic attacks, but it is still not certain whether it can be the only cause or is merely a precipitating factor.

4. Occupational asthma - This can take place in certain industries in which there exists exposure to metallic dust particles (esp. platinum salts), natural detergents, toluene diisocyanate, polyurethane material, flour and dust from grains and so on

Whatever may be the cause, it finally causes paroxysms of bronchial blockage produced by widespread bronchial spasm accentuated by inserting of the bronchi with excessive mucus.

only pure atoms are on the periodic table, a compound is a combination of two or more elements chemically bonded to each other, so in short compounds are not on the periodic table because they could be sodium chloride, not an element, it is a molecule, you catch my drift?

Just add 'em up.

Example: 4-4'-methylene diphenyl diisocyanate, which is used to make polyurethane. (I could have picked something real common like water (3 atoms) or glucose (24 atoms) but I wanted to make this fun...) Its formula is:

C15H10N2O2

So we have:

15 carbon atoms

10 hydrogen atoms

2 nitrogen atoms

2 oxygen atoms

Or 29 atoms total.