Protective coatings made up
of rubber will prevent surface from abrasion and wear, it will also give
good chemical resistance. Coated surface will give higher light
reflection and it is easy to clean.
Showing posts with label Rubberproject. Show all posts
Showing posts with label Rubberproject. Show all posts
Wednesday, 11 May 2016
Chlorinated Rubber Paint
Paints
are basically a type of adhesive. Chlorinated paint is made of neoprene
(Poly chloroprene Neoprene or poly-chloroprene), is the basis for one of
the largest and most important groups of rubber adhesives. At present
27 neoprene are produced in solid form, and 16 in latex form; most of
them have been used in adhesives.
The rapid development of bond strength of films from solution, combined with tack or auto adhesion, as well as resistance of the cured glue line to heat oxidation, water, solvents, oils, acid and alkalis, have led to the extensive use of neoprene solvent cements in the shoe, furniture, automotive, paint and construction industries.
Preparation of modified chlorinated rubber paint using “GRAPHITE” precedes by the following method:- Graphite added to xylene and stirring the mixture.Adding chlorinated rubber dissolved in xylene, toluene and butyl acetate solution.Finally in this dispersion chlorinated paraffins and phenloic resins are added undergoing mixing, shearing and filtering to obtain a paint.
Our project involves three different formulation of chlorinated rubber paint where a pre-modified graphite is used in manufacturing chlorinated rubber paint.The pre-modified graphite adds on to the poor thermal stability of chlorinated rubber.Natural graphite has a good thermal stability and flame retardancy .
Adding a certain amount of graphite, would significantly improve its thermal stability.The present invention is prepared using graphite oxide its carbon content is 60-84%, oxygen content is 15-38%. Thus we are aiming to carry out this project at L.D. College of the Engineering Ahmedabad for improving the properties at comparatively.
The rapid development of bond strength of films from solution, combined with tack or auto adhesion, as well as resistance of the cured glue line to heat oxidation, water, solvents, oils, acid and alkalis, have led to the extensive use of neoprene solvent cements in the shoe, furniture, automotive, paint and construction industries.
Preparation of modified chlorinated rubber paint using “GRAPHITE” precedes by the following method:- Graphite added to xylene and stirring the mixture.Adding chlorinated rubber dissolved in xylene, toluene and butyl acetate solution.Finally in this dispersion chlorinated paraffins and phenloic resins are added undergoing mixing, shearing and filtering to obtain a paint.
Our project involves three different formulation of chlorinated rubber paint where a pre-modified graphite is used in manufacturing chlorinated rubber paint.The pre-modified graphite adds on to the poor thermal stability of chlorinated rubber.Natural graphite has a good thermal stability and flame retardancy .
Adding a certain amount of graphite, would significantly improve its thermal stability.The present invention is prepared using graphite oxide its carbon content is 60-84%, oxygen content is 15-38%. Thus we are aiming to carry out this project at L.D. College of the Engineering Ahmedabad for improving the properties at comparatively.
Rubberized Asphalt Project
This
specification covers asphalt-rubber binder, consisting of a blend of
paving grade asphalt cements, ground recycled tire (that is, vulcanized)
rubber and other additives, as needed, for use as binder in pavement
construction.
The rubber shall be blended and interacted in the hot asphalt cement sufficiently to cause swelling of the rubber particles prior to use.
Tests shall be performed to conform with the physical requirements of the asphalt-rubber binder, in accordance with the following test methods
apparent viscosity; modified test method; penetration; softening point; resilience; flash point; thin-film oven test residue; and penetration retention.
The rubber shall be blended and interacted in the hot asphalt cement sufficiently to cause swelling of the rubber particles prior to use.
Tests shall be performed to conform with the physical requirements of the asphalt-rubber binder, in accordance with the following test methods
apparent viscosity; modified test method; penetration; softening point; resilience; flash point; thin-film oven test residue; and penetration retention.
REPROCESSING OF POLYURETHANE FOAM
The aim
of this work is to introduce a novel chemical recycling approach
forpolyurethane foam wastes which can produce useful chemicals.
Flexiblepolyurethane foam was dissolved in a mixture of diethylene
glycol (DEG) andpentaerythritol (PE).
PER is a useful choice in recycling processes because of its OHfunctional groups and its structural similarity to polyols. Meanwhile, there are severa lenvironmental advantages for chemical recycling of polyurethane foam wastes due to the capabilities of the above method.
The transesterification process cleaves the urethane structure, producing OH containing chemicals. The product is separated in 2phases which are both useful in the production of new PU foams. The split product was characterized by several analytical methods, e.g., chromatography and spectroscopy.Optimum reaction condition and the role of recycled polyol on foam properties were investigated, as well.
The solvent system contained DEG/PER as 9/1 ratio. Sodiumhydroxide was used as the catalyst and the optimum reaction time was 4 h. Separated phases of the product are reusable in polyurethane foam formulation: upper phase inflexible (40%) and lower phase in rigid (30%) foams to obtain desirable physical properties in the final product.
This method can be introduced as a route for reductionof environmental hazardous materials, while regenerating valuable raw materials.
PER is a useful choice in recycling processes because of its OHfunctional groups and its structural similarity to polyols. Meanwhile, there are severa lenvironmental advantages for chemical recycling of polyurethane foam wastes due to the capabilities of the above method.
The transesterification process cleaves the urethane structure, producing OH containing chemicals. The product is separated in 2phases which are both useful in the production of new PU foams. The split product was characterized by several analytical methods, e.g., chromatography and spectroscopy.Optimum reaction condition and the role of recycled polyol on foam properties were investigated, as well.
The solvent system contained DEG/PER as 9/1 ratio. Sodiumhydroxide was used as the catalyst and the optimum reaction time was 4 h. Separated phases of the product are reusable in polyurethane foam formulation: upper phase inflexible (40%) and lower phase in rigid (30%) foams to obtain desirable physical properties in the final product.
This method can be introduced as a route for reductionof environmental hazardous materials, while regenerating valuable raw materials.
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