Thursday, September 14, 2017

B-Stage Resins

A-B Stage Adhesives

A B-stage resin is one in which a limited reaction between resin and hardener has been allowed to take place, and the reaction arrested while the product is still fusible and soluble, although having a higher softening point and a more limited solubility than originally. A B-stage resin contains sufficient hardener to effect curing on subsequent heating. The term “B-stage” is one of long standing in connection with phenol formaldehyde resins, where it has a similar, but not a corresponding meaning.

The first epoxy B-stage resin to attract attention was that formed by meta-phenylenediamine, but under controlled conditions it is possible to form B-stage products from a number of bisphenol A resins and hardeners. The most important B-stage resins are produced by using aromatic polyamine hardeners, the B-stage being created by heating the reactants together to bring about a homogeneous state and then cooling.

B-stage resins can also be produced from aliphatic amines, but because these in general, are more reactive than aromatic amines, the B-stage resins are more difficult to produce. In order to obtain a stable B-stage product it is necessary to use a solid form of the epoxy resin. This may be dissolved in the aliphatic (liquid) amine itself, when after a short time the solid B-stage is assumed. Alternatively the resin and amine may be dissolved in a volatile solvent, but the solvent must be removed rapidly before the irreversible reaction that finally brings about infusibility has advanced very far. Obviously, the highly reactive aliphatic amines such as triethylenetetramine make the preparation of a B-stage material rather difficult, and the product when formed is less stable.

The advantage of B-stage resin in the formation of adhesives is that they enable one component systems to be prepared, especially film adhesives. One such adhesive film is described in which pre-reaction can be affected by either an aromatic diamine or an acid anhydride adhesives.

Tuesday, August 29, 2017

How to remove adhesive from your hand

Remove Adhesive that is Sticked to

Remove Superglue, Power glue or locktite and many other similar adhesive with many trade mark.
Super glue or Power glue is a glue that made from cyanoacrylate this glue is an organic compound that is made from cyanoacetic acide that is slight soluble in water, using hot water this glue can be removed more easy but not very easy. You must a little bit patient to remove it from your hand don’t hurry and don’t worry, if you using water this glue will not hurt your hand. If this glue is splash to critical organs such as the eye, you must wash your eyes with flowing water immediately after that you directly go to doctor for further treatment.

Many trade mark of plastic adhesive in the market like Power Glue, Super Glue or Locktite
Plastic Adhesive

Remove Steel Glue

Steel glue usually made from compound of epoxy adhesive that is mixed with hardener. The type of hardener can vary depend on the application use. If you look to your big book on chemical engineering book you will not find a chemical name epoxy. Epoxy resin are fundamentally polyesters, but retain their name on the basis of their starting material and the presence of epoxide groups in the polymer before crosslinking. Epoxy resin adhesive is chemicals resistance and also electrical resistance so it will depend on how you mixed with hardener they will how easy to remove. If you make a perfect solution the result will be a very good compound that very hard to remove. So if this glue is stick to your hand better use water immediately to make the mixture is not perfect so that easy to remove from your hand. Epoxy resin adhesive also cure by the availability of acid so to remove better using base formula like Lime. Use lime solution and try to rub to your hand smoothly.

Steel glue is adhesive use for steel materials
Steel Glue

Remove PVC glue

To remove plastic glue from your hand is only use water. But this glue is not soluble in water. Water only neutralize the chemical effect to your hand because sometimes people have allergy to certain chemicals. Warm water may more better to remove this glue from your hand. To remove PVC glue from PVC pipe that already stick to, is try use hot water. Dipped PVC pipe into the hot water for few minutes and after hot effect have equally to the inside of pipe, try to disconnect the joint. More hot the water more easily to disconnect the joint but if you boiled that PVC pipe, may can be broke the pipe.

PVC glue is adhesive use for plastic like paralon etc.
PVC Glue

Remove Glass Glue from your hand

Glass glue usually use silicone glue, that silicone glue is a glue that use non polar solution to make the solution. Use non polar solvent to remove this glue from your hand. Alcohol is semi non polar solvent but the most safe for your body, tinner also non polar solvent this can remove glass glue from your hand also from the glass itself, and the next solvent is acetone that more non polar compare to alcohol. Acetone can remove many kind of adhesives. Be careful use acetone to remove adhesive from your hand. Pour acetone on a cloth and wipe your hand gently.

Remove adhesive from your hand better use cloth
Remove Adhesive

many kind of adhesive product in the market
Many Kind Adhesive

Saturday, July 1, 2017

3M Adhesives

3M Adhesives Product

3m adhesives is waterbase adhesive, this adhesive is high strength adhesive. This adhesive have benefits such as have good bonding strength and long bonding range, post formable and has good heat resistance. This adhesive has good bonding in plastics, plastic laminate, wood, plywood, wood veneer, and canvas. For adhesive that I already use, alcohol solvent is good to make adhesive dilute and your can spray it to paper or other material to use adhesive. Alcohol base adhesive .....

Commonly use adhesive tape to make note on the table
3M Adhesive Tape

3M Formula Adhesive

To see what the formula of this adhesive can see on the MSDS of this adhesive, this information also can copy or try for you as long as use for how to safety handing and safety application.

Sunday, November 16, 2014

Epoxy Paint Adhesive

Look to the properties of epoxy paint, epoxy paint can be applied into the several places like to the floor, wall and other application. Epoxy paint properties Is tough, long-lasting coating, and can be applied into the concrete. Epoxy paint is resist to grease, oil and many other substances that would ruin ordinary paint. Epoxy paint can be easily cleaned, so make your floor concrete look attractive for years.

Epoxy Paint
Epoxy Paint

The reality of using this paint, not all concrete can hold a coating, and sometimes it will loose from the floor. This because of the surface of your concrete is not similar with others so it will lose while others are not. Bad concrete surface make paint easily to lose if paint don’t stick strongly to the floor. Good pretreatment of epoxy paint to the concrete surface can demonstrate that will able to handle car traffic, chemicals, oils, salt and scrapping better than any other paint or stain.

Preparing of surface, it spent time, because it should be clean enough from oil spot, cleaning and degreasing floor, etching with a mild acid, and scrubbing, vacuuming and rinsing. The second day is then filling cracks and applying first coat of epoxy, and followed by a second coat on the third day.

Related article about expoxy adhesive:

Wednesday, November 12, 2014

Epoxy Resin Hardeners

Epoxy resin will cured with high strength plastic soiled at room temperatures, by mixing specific proportions of liquid epoxy resin and hardener. Highly moisture resistant plastic adheres to a wide range of materials, and this properties ideal for projects that required water and chemical resistance and strong physical properties and structural bonding.

The strength of this adhesive depend the kind of hardener use, better hardener and suit composition will get best strength and good physical properties after curing. Type of hardener for Epoxy resin like HN-2200, HN-2000, HN-5500 and MHAC.

Alicyclic acid anhydride type have less toxicity, a longer pot life and lower exothermic characteristics in comparison with amine type hardeners. Applications of these epoxy resin hardeners extend to casting, impregnation, lamination and many others.

How to use:
- Liquid hardeners easy to mix with epoxy resins
- Less toxicity than amine type hardeners
- Epoxy resin compounds available a long pot life
- Cured epocy resin compounds available excellent heat resistance by being cured with MHA.

Sample product of Epoxy Resin and the hardener as follows: