Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
  • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
  • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
  • C08G63/16—Dicarboxylic acids and dihydroxy compounds
  • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
  • C08G63/181—Acids containing aromatic rings
  • C08G63/183—Terephthalic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
  • C08G63/78—Preparation processes

Definitions

• the present invention relates to a method for inhibiting acetaldehyde, carboxyl end groups, and diethylene glycol chemicals in case Mg 2 B 2 0s compound in ratio of 0.2% is added into PET during injection.
• Polyethylene terephthalate is polyester which has various fields of use such as beverage, food and drink containers, synthetic fiber, and which can change its form with heat treatment.
• PET polyethylene terephthalate
• the most important advantage of polyethylene terephthalate (PET) is that it is a recyclable plastic.
• two different production techniques of polyethylene terephthalate are known.
• dimethyl terephthalate and ethylene glycol are used in the first method.
• production is performed in two different ways, namely continuous and discontinuous.
• PET polyethylene terephthalate
• PET resins are comprised of small particles sold as pellet. First, these pellets are melted at a specific temperature, and then transferred to the injection machine in order to produce preform. Preforms generally have test tube appearance and are in different colors depending on the characteristics of the product to be manufactured. The weight of the preforms is generally 14-103 grams. PET production starts with preform.
• the injection machine is comprised of two main parts; its first part is the part which comprises the components that melt the plastic materials and can inject into the mold. Its other part comprises the mechanisms which carry the mold and which can cover and uncover the mold, provide the molding pressure after it is covered, actuate the drivers, provide water supply and discharge for the cooling channels of the mold thereon.
• the preform is heated with lamps called as "heating boxes”.
• the assembly of the said lamps is called as profile.
• the preform is sent into the mold.
• the hot preform is stretched in the system.
• the stretching rod enters into the preform and stretches the preform longitudinally.
• the bottle takes its final form and the air therein is discharged.
• Carboxyl end groups are one of the parameters affecting the reaction speed. In general, thermal and thermal oxidative degradation and the increase of carboxyl end groups cause degradation of PET and losses in molecular weight. The thermal degradation of PET chains generally originates from the carboxyl end groups and the presence of acetaldehyde. Yellowing in the PET material is observed with the increase of carboxyl end groups and acetaldehyde.
• acetaldehyde is among the compounds which are likely to show carcinogenic effects on human health.
• FIG 1 is the flowchart of the Polyethylene Terephthalate production.
• Figure 4 is a graphical representation of the change of the diethylene glycol (DEG) in the mixture by weight (%) depending on the use of the pure g 2 B 2 0s compound (%) in PET mixture within the scope of the invention.
• DEG diethylene glycol
• PET Polyethylene Terephthalate
• An inventive method for inhibiting harmful chemicals in production of PET materials enables the harmful chemicals such as acetaldehyde (AA), COOH end group content (COOH), diethylene glycol (DEG) which are created upon the chemical degradation of Polyethylene Terephthalate (PET) material during the period passing from the raw material until the final product in Polyethylene Terephthalate (PET) production process and which are by-products threatening human health, and comprises the steps of
• step of mixing magnesium nitrate, boric acid and urea solutions 2 moles of Mg(N0 3 ) 2 , 2 moles of H 3 BO 3 and 4 moles of CH 4 N 2 O solutions are used.
• the mixture in step of sintering the mixture in powder form in ash furnace, the mixture is sintered in the ash furnace at 900 °C.
• Polyethylene terephthalate (PET) material chemically degrades in the period passing from the raw material until the final product and causes by-products threatening human health to be formed.
• PET Polyethylene terephthalate
• the formation of harmful chemicals such as acetaldehyde (AA), COOH end group content (COOH), diethylene glycol (DEG) is prevented in certain amounts by means of adding Mg 2 B 2 0s mineral in ratio of 0.2% into polyethylene terephthalate (PET) material in preform stage with injection.
• Mg 2 B 2 0 5 particles used within the scope of the invention are produced with sol- gel method.

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Detergent Compositions (AREA)

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Publications (2)

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ID=66539124

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• 2018
  • 2018-11-01 WO PCT/TR2018/050648 patent/WO2019098979A2/en unknown
  • 2018-11-01 EP EP18879477.0A patent/EP3710215A4/de not_active Withdrawn

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