RMMA Monomer, RPMMA Sheets

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Unitech International Limited is specialized in Eco- friendly Recycling of Plastic Polymers ( Thermo engineering Acrylic, Acrylates, Monomers ). We have two modernized plants in Silvasa, DNH ( UT ) and Achhad, Talasari Taluk, Palghar District, Maharashtra.

Sustainable Process – Eco-friendly

Sustainable design is good for people, good for the planet, and good for business. UNITECH emphasizes involvement in INTERNATIONAL TRADING as well as MANUFACTURING with sustainable visions.

“Sustainability” has become a buzzword in the last decade, UNITECH in India is pioneer in the attempt of manufacturing with most eco-friendly sustainable process. We believe that innovation doesn’t just mean creating new products; it means creating new technologies that allow us to create our products with the minimum impact on our environment.

Over the years, this focus on sustainability means we’ve been able to:

  • Reduce our water consumption
  • Reduce carbon emissions by 20%
  • Reduce waste
  • Save energy

Sustainability Characteristics

  • Made from 100% recycled raw materials (recycled Methyl methacrylate monomer) and can be recycled over and over again.
  • Complies with International Standards.
  • VOC- and HFC-free to the maximum possibilities.
  • Uses less water and generates less carbon dioxide than the virgin materials and cast acrylic sheet production process.
  • Produced with synthetic Monomer (MMA), which significantly reduces the carbon foot print.

Products

Methyl Methacrylate free radical (MMA MONOMER)

Methyl methacrylate free radical (MMA MONOMER) is the key product for manufacturing PMMA. It is also used in the production and modification of a wide variety of polymers – mainly in cast sheet, methacrylate molding compounds and graft copolymers as impact modifiers for thermoplastics. Further application fields include artificial marble, PVC modifiers and PVC plastisols. Molding compounds based on unsaturated polyester resins may also contain multifunctional methacrylates as crosslinking agents.

In addition, methacrylates are used as comonomers to improve the performance of polymers in extrusion coating applications. Typical end-use applications, here, include liquid carton packaging, photographic paper, flexible and commercial packaging (e.g. coffee pouches).
Methyl methacrylate (MMA) is a MONOMER that is also known as methacrylic acid, methyl ester.

A key building block for acrylic-based polymers, MMA has applications that include safety glazing, exterior paints, vinyl impact modifiers, adhesives, illuminated light displays, and more.

Polymethyl Methacrylate ( PMMA ) Sheets & Products.

Polymethyl methacrylate is polymerized from methyl methacrylate free radical ( MMA MONOMER ), called PMMA for short, and commonly referred to as organic glass and acrylic.

In addition, PMMA has good electric insulativity, chemical agent resistance, solvent resistance and climate resistance. PMMA optical-level molding material has better transparency; optical property is good, light, impelling resistant and easy to be molded and processed and other plastic properties, so it can replace inorganic glass, which gains broad application in optical field, and it is indispensible to eyeglass, compact disc, optical fiber, LCD LGP and so on. Especially in recent years, LCD market increases fast and optical-level PMMA molding material consumption increases greatly.

Methyl methacrylate (MMA) is an organic compound. In free radical initiated copolymers, MMA elevates the Tg (glass transition) and contributes durability, strength, transparency, and UV and abrasion resistance.

The chemical structure of MMA is shown below.

Here are several other key pieces of information about methyl methacrylate

CAS Number 80-62-6
EINECS Number 201-297-1
Empirical Formula C5H8O2
Molecular Weight 100.12
Melting Point -48 °C (-54℉)
Boiling Point 101°C (214℉)
Flash Point 2°C (36℉)

Additionally, it is important to note that the Tg value for PMMA homopolymer is 105°C.

In polymers, MMA contributes durability, hardness, impact strength, scratch resistance, and clarity.

Methyl Methacrylate ( MMA MONOMER ) and PMMA

Methyl Methacrylate (MMA MONOMER) is colorless liquid, the methyl ester of methacrylic acid (MAA). Major application of Methyl Methacrylate in the world is for the production of poly(methyl methacrylate) (PMMA). But another major application is in surface coatings. MMA is also used as co monomer in methyl methacrylate butadiene styrene resins, used as a modifier for polyvinyl chloride (PVC).

MMA is a key intermediate chemical, due to its ability to undergo polymerisation and co-polymerisation. Polyacrylates, a family of clear and relatively durable thermoplastics, are the major source for the consumption of MMA

Today global consumption of MMA exceeds 3.7 million metric tonne (MT) per year, of which more than two million tonne is for MMA polymers.

Methyl methacrylate monomer readily polymerizes to form high molecular weight homopolymers and copolymers.

The principal use for MMA monomer is to form polymethyl methacrylate (PMMA) homopolymer for the production of cast and extruded acrylic sheets. These cast PMMA sheeting products exhibit good optical clarity, high transparency, and UV stability. Applications include…

  • Shatterproof glass replacements.
  • Safety glazing.
  • Panels and lighting displays.
  • Outdoor lighting fixtures.
  • Plumbing fixtures and components.

Outside of glazing and sheet applications, the largest use for MMA is as a comonomer in paints and coatings, such as exterior paints and paper coatings. Polymers and copolymers of methyl methacrylate are in…

  • Metal and foil coatings.
  • Industrial finishes.
  • Floor polishes.
  • Textile finishes.
  • Adhesives.
  • Sealants.
  • Construction materials.
  • PVC impact modifiers.
  • Packaging.
  • Inks.

The other primary product of this industry is crude methacrylic acid (crude MAA), which is produced by similar technology but often in separate plant units. Production of crude MAA (for usages other than MMA) is around 20 per cent of the total production of MMA.

Most applications of MMA monomers are through pure or almost pure homopolymers. When it comes to polymerization, the range of acrylic copolymers that can be used with MMA is extensive. Monomer feeds can include…

  • Butyl acrylate.
  • 2-Ethylhexyl acrylate.
  • Methyl methacrylate and other methacrylate esters.
  • Acrylic acid and methacrylic acid.
  • Styrene.
  • Butadiene.

The monomer composition selected for copolymers is driven by the desired Tg of the resin, ranging from -30˚C to > 30˚C.

Acrylic acid and its esters such as Methyl acrylate, Ethyl acrylate, Butyl acrylate and 2-Ethylhexyl acrylate, are known as basic acrylates. Most of the acrylates are flammable, volatile and colourless liquids.

Of all the methacrylates byproducts, methyl methacrylate is the most important. For it is polymerized to form polymers and resins of excellent strength, transparency, and durability for outdoor.

Emerging uses of MMA in digital signboards and displays in the advertising industry and in optical applications such as LCD, LED screens, and flat panel displays in the electronics industry are stimulating growth in the market.

Liquid crystal displays : The key drivers for the strong MMA demands are: LCD TVs and other electronic equipment, automobiles and mobile phones.
Acrylics is used in Liquid Crystal Displays (LCD) and the current and projected growth for large LCD screens for home theatre etc. has been a major driver for MMA expansions, especially in Asia, where virtually all the LCD manufacturing market is now concentrated.

Moulding resins : MMA is used in the production of moulding resins (excluding the resin beads prepared for extruded acrylic sheet production). Most of the final products are destined for automotive parts and electrical appliances.

Surface coatings : MMA is used for the production of surface coatings, both for industrial solvent based systems and increasingly, for water based acrylic dispersions for domestic and industrial use. MMA is used in water based acrylic dispersions for exterior masonry and wood coatings and semi gloss emulsions for interior decorative coatings.

The consumption pattern of MMA in India differs from that of the rest of the world. The major use of the monomer in India is in the coatings industry, which accounts for about 70% of total consumption. Only 12% of total consumption is for making PMMA sheets and mouldings.

With over 70% of Methyl Methacrylate (MMA) used in the production of Polymethyl Methacrylate (PMMA), the growing demand for PMMA against the backdrop of strong electronics production is benefiting growth in the MMA market.

Polymethyl Methacrylate (PMMA) is expected to emerge as a substitute for existing medical polymers, against the backdrop of growing concerns over the health hazards caused by the use of PVC and polypropylene in addition to low biocompatibility issues. The presence of phthalate plasticizers in PVC is generating significant interest in PMMA in the healthcare industry.

Stable automobile production trends worldwide are also expected to help boost global consumption of MMA. The growing use of plastics as a result of the increased focus on manufacturing light vehicles is helping spur demand for MMA/PMMA in automobile production.

The automotive industry is one of the largest end user of MMA especially in molding and extrusion compounds. The use of MMA/PMMA in automotive plastics in addition to weight reduction also helps minimize vehicle vibration, cabin insulation, noise control, and enhance aesthetics.

PMMA liquid membrane roofing system is a major advancement in the market, used in a wide range of applications including plaza decks, garden roofs, small roofs and irregular shaped roofs. The PMMA liquid membrane system is widely used in roofing crews owing to several benefits such as substrate compatibility, ease of use, speed and versatility.

The point of giving proper attention to safety is critical when handling methyl methacrylate for several reasons has been given top priority in this project. Major changes in project plan has been made keeping in mind this safety and handling this flammable product.

MMA is a flammable, colorless liquid which melts at -48˚C and boils at 101˚C. While MMA is soluble in the most organic solvents, it is insoluble in water.

In addition to being flammable, direct contact with MMA can cause irritation of the eyes, skin, nose, and throat. Considered a skin sensitizer, methyl methacrylate can produce allergic reactions from contact, in which future exposures can cause itching and a skin rash.

Even more seriously, inhalation of MMA vapor or mist can cause irritation of the nose, throat, and lungs and can be fatal in high concentrations.

Because MMA can violently homo-polymerize and can generate considerable heat and pressure, MMA is only provided in a stabilized form. To ensure MMA’s stabilizer can function effectively, it’s important to store MMA under air and replenish the dissolved oxygen.

Production Process

Depolymerisation is thermal or thermocatalytic decomposition of organic materials at elevated temperatures in absence of air or Oxygen.

Depolymerisation Methods :

  • Thermal (By heating)
  • Thermo-Catalytic (By using heat & catalyst)

CD Technology

  • Collection of Plastic Strips, Off cuts, End residuals by Import and Local supply.
  • Quality control with environmental safety assurances.
  • Cutting , Shredding, pulverizing, grinding, sorting, extruding, casting.
  • Feeding to reactor.
  • De-Polymerisation (Heating + Catalysis).
  • Synthetic oil / Poly-fuel + gas + wood/charcoal.
  • Oil cleaning
  • Fractional Distillation, condensation.
  • Purified fuels.

Depolymerisation Plant and machinery

  • Plastic feeding system
  • Reactor 1
  • Reactor 2
  • Heating system
  • Condensed
  • Receiver Gas
  • Cleaning system
  • Gas handling system
  • Oil cleaning system
  • Oil storage Control panels
  • Fractional distillation
  • Unit Fittings and fixtures