CETINTAS REFIKA (TR)
ARCA SERHAT (TR)
BASKENT EMEL (TR)
KOCAMAN ELIF (TR)
KOSTERELI ZIYA (TR)
YASAR MUZAFFER (TR)
GURDAL SAVAS (TR)
AMENDED CLAIMS received by the International Bureau on 16 May 2019 (16.05.2019) 1- A method for preparing a modified bituminous mixture, characterized by comprising the steps of - Washing waste PET products gathered in collection areas with a predetermined amount of water to free PET products from Impurities; - Drying the washed waste PET products; - Turning the dried waste PET products Into scrap PET suitable for use in the recycling reactions; - Loading the scrap PETs into a reactor in which the recycling reaction is to be carried out; - Adding Ethylene Glycol Into the reactor to which the scrap PETs were loaded to carry out the recycling reaction; - Conducting the recycling reaction in the presence of at least one catalyst; - Following the completion of the recycling reaction, obtaining a product comprising monomelic BHET, ethylene glycol and impurities; - in order to purify the obtained product from said impurities, washing it with a predetermined amount of water; - Taking the fractions from the washed product, which make up impurities in the product by remaining water-insoluble, into a first container; - After separating the fraction forming impurities from the product, taking the remaining BHET monomers and ethylene glycol into a second container; - Crystallizing the BHET monomers by keeping the remaining BHET monomers and ethylene glycol in the second container in a cold environment; - Generating a phase separation with the crystallized BHET monomers sinking to the bottom in ethylene glycol; - Filtering the sunk BHET monomers to separate them from ethylene glycol; Obtaining BHET monomers suitable for use in polyurethane reactions by purifying BHET monomer crystals obtained after filtration from the whole ethylene glycol. - adding MDI as an isocyanate monomer into a reactor comprising a mechanical mixer; - adding into the MDI-comprising reactor BHET monomers, as a diol monomer, obtained through recycling reactions from waste PET products; - following the addition of BHET monomer* into the reactor, adding butanediol «8 a chain extender so that the polymerization reaction is initiated; - following the completion of the polymerization reaction, obtaining polyurethane suitable for use as an additive in modified bituminous mixtures. - Flurdizing bitumen, as the main component of the mixture, at 130-140'C; - Transferring the fluidized bitumen into a mechanical mixer; - Producing polyurethane-bitumen mixture by adding polyurethane as an additive in hot form to bitumen, whose temperature is between 130-140'C, in said mixer while stirring process continues, wherein the polyurethane is synthesized as a result of a polymerization reaction of BHET monomers, as a diol monomerobtalned through a recycling reaction of waste PET products with diteocyanate monomer and a chain extender as a dloi monomer is synthesized as a result of a polymerization reaction of BHET monomers, , obtained through a recycling reaction of waste PET products with diisocyanate monomer and a chain extender* - Stirring further this mixture for a predetermined time at a predetermined stirring speed to obtain a homogeneous polyurethane-bitumen mixture; - Following the completion of the stirring process, obtaining a homogeneous polyurethane-added modified bituminous mixture. 2- The method for preparing a modified bftuminoue mixture according to daim 1, characterized in that the bitumen is fluidized at 135'C. 3- The method for preparing a modified bituminous mixture according to claim 1, characterized in that the stirring speed is 120 rpm. 4- The method for preparing a modified bituminous mixture according to claim 1, characterized in that said time period is 60 minutes. 5- The method for preparing a modified bituminous mixture according to claim 1, characterized in that the method further comprises the steps of adding a predetermined amount of SBS to the obtained polyurethane-added modified bituminous mixture; - obtaining a polyurethane- and SBS-added modified bituminous mixture; - stirring further this mixture for a predetermined time at a predetermined stirring speed to obtain a homogeneous polyurethane- and SBS-added modified bituminous mixture; following the completion of the stirring process, obtaining a homogeneous polyurethane- and SBS-added modified bituminous mixture. 6- The method for preparing a modified bituminous mixture according to claim 5, characterized In that the SBS is divided Into 10 equal portions and is added in this way to polyurethene-added modified bituminous mixture. 7- The method for preparing a modified bituminous mixture according to claim 5, characterized In that the SBS is added to the obtained polyurethane-added modified bituminous mixture at 180'C. 8- The method for preparing a modified bituminous mixture according to claim 5, characterized in that the SBS is added to polyurethane-added modified bituminous mixture by means of a mechanical mixer running at 400 rpm speed. 9- The method for preparing a modified bituminous mixture according to claim 5, characterized in that 10% of the total amount of SBS to be added is added each time at 3-minute intervals to the polyurethane-added modified bituminous mixture. 10- The method for preparing a modified bituminous mixture according to claim 5, characterized In that the polyurethane- and SBS-added modified bituminous mixture is stirred for 60 minutes. 11- The method for preparing a modified bituminous mixture according to claim 5, characterized in that the obtained homogeneous polyurethane- and SBS-added modified bituminous mixture comprises 3% or less than 3% by weight of polyurethane and 3% or less than 3% by weight of SBS. 12- The method for preparing a modified bituminous mixture according to claim 5, characterized in that the obtained homogeneous polyurethane- and SBS-added modified bituminous mixture comprises 3% by weight of polyurethane. 13- The method for preparing a modified bituminous mixture according to claim 6, characterized in that the obtained homogeneous polyurethane- and SBS-added modified bituminous mixture comprises 3% by weight of SBS. 14- The method for preparing a modified bituminous mixture according to claim 1, characterized in that MDI Is added in a melt form at 80#C. 16- The method for preparing a modified bituminous mixture according to claim 1, characterized in that said reactor is a batch reactor. 16- The method for preparing a modified bituminous mixture according to claim 1, characterized in that BHET monomers are added dropwise In a mett form at 110°C. 17· The method for preparing a modified bituminous mixture according to claim 1, characterized in that said mixer la coupled to the reactor from the top. 18- The method for preparing a modified bituminous mixture according to claim 1, characterized in that the polymerization reaction is carried out under a nitrogen blanket 18- The method for preparing a modified bituminous mixture according to claim 1, characterized in that BHET monomers, butanediol and MDI are added to said reactor In a maaa proportion of 1:1:8 (BHET:butanediol:MDI). 20- The method for preparing a modified bituminous mixture according to claim 1, characterized in that the remaining BHET monomers and ethylene glycol present in the second container are held in a cooler at 4 to 6'C for 24 hours. 21 -The method for preparing a modified bituminous mixture according to claim 1, characterized in that said scrap PETs have a size of 1cmx1cm. 22- The method for preparing a modified bituminous mixture according to claim 1, characterized in that said reactor is made of glass. 23- The method for preparing a modified bituminous mixture according to clalml or claim 24, characterized in that laid reactor is three-necked. 24- The method for preparing a modified bituminous mixture according to claim 1, characterized in that said catalyst is a zinc acetate catalyst. 26- The method for preparing a modified bituminous mixture according to claim 1, characterized in that said recycling reaction Is carried out at a temperature of 195- 200°C. 26- The method for preparing a modified bituminous mixture according to daim 1 , characterized In that the recycling reaction is earned out for 3 hours. |
Next Patent: FUEL SYSTEM WITH PRESSURE REGULATOR