WO2023075472A1 - 프로판 트리카복실레이트계 가소제 조성물 및 이를 포함하는 수지 조성물 - Google Patents
프로판 트리카복실레이트계 가소제 조성물 및 이를 포함하는 수지 조성물 Download PDFInfo
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- WO2023075472A1 WO2023075472A1 PCT/KR2022/016617 KR2022016617W WO2023075472A1 WO 2023075472 A1 WO2023075472 A1 WO 2023075472A1 KR 2022016617 W KR2022016617 W KR 2022016617W WO 2023075472 A1 WO2023075472 A1 WO 2023075472A1
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- alcohol
- weight
- isomer mixture
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- 239000000203 mixture Substances 0.000 title claims abstract description 199
- CEGRHPCDLKAHJD-UHFFFAOYSA-N 1,1,1-propanetricarboxylic acid Chemical compound CCC(C(O)=O)(C(O)=O)C(O)=O CEGRHPCDLKAHJD-UHFFFAOYSA-N 0.000 title claims abstract description 21
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- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 claims abstract description 178
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 21
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims abstract description 9
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 claims description 75
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 48
- IWTBVKIGCDZRPL-UHFFFAOYSA-N 3-methylpentanol Chemical compound CCC(C)CCO IWTBVKIGCDZRPL-UHFFFAOYSA-N 0.000 claims description 32
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- 229920000642 polymer Polymers 0.000 claims description 23
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- PFNHSEQQEPMLNI-UHFFFAOYSA-N 2-methyl-1-pentanol Chemical compound CCCC(C)CO PFNHSEQQEPMLNI-UHFFFAOYSA-N 0.000 claims description 17
- ISQVBYGGNVVVHB-UHFFFAOYSA-N cyclopentylmethanol Chemical compound OCC1CCCC1 ISQVBYGGNVVVHB-UHFFFAOYSA-N 0.000 claims description 15
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 11
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 8
- 125000004851 cyclopentylmethyl group Chemical group C1(CCCC1)C* 0.000 claims description 6
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- XRMVWAKMXZNZIL-UHFFFAOYSA-N 2,2-dimethyl-1-butanol Chemical compound CCC(C)(C)CO XRMVWAKMXZNZIL-UHFFFAOYSA-N 0.000 claims description 4
- SXSWMAUXEHKFGX-UHFFFAOYSA-N 2,3-dimethylbutan-1-ol Chemical compound CC(C)C(C)CO SXSWMAUXEHKFGX-UHFFFAOYSA-N 0.000 claims description 4
- TZYRSLHNPKPEFV-UHFFFAOYSA-N 2-ethyl-1-butanol Chemical compound CCC(CC)CO TZYRSLHNPKPEFV-UHFFFAOYSA-N 0.000 claims description 4
- WFRBDWRZVBPBDO-UHFFFAOYSA-N 2-methyl-2-pentanol Chemical compound CCCC(C)(C)O WFRBDWRZVBPBDO-UHFFFAOYSA-N 0.000 claims description 4
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- ZXNBBWHRUSXUFZ-UHFFFAOYSA-N 3-methyl-2-pentanol Chemical compound CCC(C)C(C)O ZXNBBWHRUSXUFZ-UHFFFAOYSA-N 0.000 claims description 4
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 claims description 4
- PCWGTDULNUVNBN-UHFFFAOYSA-N 4-methylpentan-1-ol Chemical compound CC(C)CCCO PCWGTDULNUVNBN-UHFFFAOYSA-N 0.000 claims description 4
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical compound CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 claims description 4
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- LQLQDKBJAIILIQ-UHFFFAOYSA-N Dibutyl terephthalate Chemical compound CCCCOC(=O)C1=CC=C(C(=O)OCCCC)C=C1 LQLQDKBJAIILIQ-UHFFFAOYSA-N 0.000 description 3
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- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 125000005591 trimellitate group Chemical group 0.000 description 1
- YPDXSCXISVYHOB-UHFFFAOYSA-N tris(7-methyloctyl) benzene-1,2,4-tricarboxylate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCC(C)C)C(C(=O)OCCCCCCC(C)C)=C1 YPDXSCXISVYHOB-UHFFFAOYSA-N 0.000 description 1
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0016—Plasticisers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
Definitions
- the present invention relates to a plasticizer composition
- a plasticizer composition comprising an isomer mixture of hexyl alcohol and propane tricarboxylate having an alkyl group derived from benzyl alcohol, and a resin composition comprising the same.
- plasticizers react with alcohols with polycarboxylic acids such as phthalic acid and adipic acid to form the corresponding esters.
- polycarboxylic acids such as phthalic acid and adipic acid
- plasticizer compositions that can replace phthalate-based plasticizers such as terephthalate-based, adipate-based, and other polymer-based plasticizers continues.
- additives such as plasticizers, fillers, stabilizers, viscosity lowering agents, dispersants, antifoaming agents, and foaming agents are mixed with PVC resin according to the characteristics required by industry, such as tensile strength, elongation, light resistance, transferability, gelling property, or absorption rate.
- plasticizer compositions applicable to PVC when relatively inexpensive and most commonly used di(2-ethylhexyl) terephthalate (DEHTP) is applied, hardness or sol viscosity is high and plasticizer absorption rate is high. was relatively slow, and transitivity and stress transitivity were not good.
- DEHTP di(2-ethylhexyl) terephthalate
- the present invention is a plasticizer composition, in which the alkyl group includes an isomer mixture of hexyl alcohol and propane tricarboxylate derived from benzyl alcohol, thereby maintaining mechanical properties and stress resistance at equal or higher levels compared to existing plasticizers, and at the same time, migration, plasticization It is intended to provide a plasticizer composition capable of improving conversion efficiency and heating loss.
- the present invention provides a plasticizer composition and a resin composition containing the plasticizer composition.
- the present invention includes a propane tricarboxylate-based composition containing at least one propane tricarboxylate of Formula 1 below, and the alkyl group of the propane tricarboxylate includes an isomer mixture of hexyl alcohol and benzyl alcohol wherein the isomeric mixture of hexyl alcohol is 1-hexanol, 1-methylpentanol, 2-methylpentanol, 3-methylpentanol, 4-methylpentanol, 1,1-dimethylbutanol, 1,2-dimethylbutanol, 1,3-dimethylbutanol, 2,2-dimethylbutanol, 2,3-dimethylbutanol, 3,3-dimethylbutanol, 1-ethylbutanol, 2-ethylbutanol, 3-ethylbutanol and It provides a tricarboxylate-based plasticizer composition comprising at least two selected from the group consisting of cyclopentyl methanol
- R 1 to R 3 are each independently an n-hexyl group, a branched hexyl group, a cyclopentylmethyl group or a benzyl group.
- the present invention provides a plasticizer composition according to (1) above, wherein the propane tricarboxylate-based composition includes at least one selected from propane tricarboxylates represented by the following Chemical Formulas 2 to 7:
- R a is each an n-hexyl group, a branched hexyl group or a cyclopentylmethyl group
- R b is a benzyl group.
- the present invention provides the plasticizer composition according to (1) or (2) above, wherein the isomer mixture of hexyl alcohol has a branching degree of 2.0 or less.
- the present invention provides the plasticizer composition according to any one of (1) to (3) above, wherein the isomer mixture of hexyl alcohol has a branching degree of 1.5 or less.
- the present invention is the plasticizer composition according to any one of (1) to (4) above, wherein the isomer mixture of hexyl alcohol includes 1-hexanol, 2-methylpentanol and 3-methylpentanol provides
- the present invention is the plasticizer according to any one of (1) to (5) above, wherein the isomer mixture of hexyl alcohol contains 40 parts by weight or more of the branched alcohol based on 100 parts by weight of the isomer mixture. composition is provided.
- the present invention is the plasticizer according to any one of (1) to (6) above, wherein the isomer mixture of hexyl alcohol contains 50 to 95 parts by weight of the branched alcohol based on 100 parts by weight of the isomer mixture. composition is provided.
- hexyl alcohol isomer mixture contains 40 parts by weight or less of 1-hexanol based on 100 parts by weight of the isomer mixture.
- a plasticizer composition is provided.
- the present invention according to any one of (1) to (8) above, wherein the isomer mixture of hexyl alcohol comprises 1-hexanol, 2-methylpentanol, 3-methylpentanol and cyclopentyl methanol. It provides a plasticizer composition that is.
- the present invention is the plasticizer according to any one of (1) to (9) above, wherein the hexyl alcohol isomer mixture contains 20 parts by weight or less of cyclopentyl methanol based on 100 parts by weight of the isomer mixture. composition is provided.
- the present invention provides the plasticizer composition according to any one of (1) to (10) above, wherein the weight ratio between the isomer mixture of hexyl alcohol and benzyl alcohol is 90:10 to 10:90.
- the present invention provides a resin composition comprising 100 parts by weight of a resin and 5 to 150 parts by weight of the plasticizer composition according to any one of (1) to (11) above.
- the resin is a straight vinyl chloride polymer, a paste vinyl chloride polymer, an ethylene vinyl acetate copolymer, an ethylene polymer, a propylene polymer, polyketone, polystyrene, polyurethane, polylactic acid, It provides a resin composition that is at least one selected from the group consisting of natural rubber and synthetic rubber.
- the plasticizer composition according to an embodiment of the present invention when used in a resin composition, maintains and improves mechanical properties and stress resistance at an equivalent or higher level compared to conventional plasticizers, and at the same time, has properties such as weight loss characteristics, transferability and plasticization efficiency. properties can be improved.
- composition includes mixtures of materials comprising the composition as well as reaction products and decomposition products formed from the materials of the composition.
- the term "straight vinyl chloride polymer” is one of the types of vinyl chloride polymers, which may mean polymerized through suspension polymerization or bulk polymerization, and has a size of tens to hundreds of micrometers. It refers to a polymer having a form of porous particles in which a large number of pores are distributed, no cohesiveness, and excellent flowability.
- the term "paste vinyl chloride polymer” is one of a kind of vinyl chloride polymer, and may mean one polymerized through microsuspension polymerization, microseed polymerization, emulsion polymerization, or the like, It refers to a polymer having cohesiveness and poor flowability as fine and dense void-free particles having a size of several thousand nanometers.
- compositions claimed through use of the term 'comprising' will, unless stated to the contrary, contain any additional additives, adjuvants, or compounds, whether polymeric or otherwise. can include
- the term 'consisting essentially of' excludes from the scope of any succeeding recitation any other component, step or procedure, excepting those not essential to operability.
- the term 'consisting of' excludes any ingredient, step or procedure not specifically delineated or listed.
- the content analysis of components in the composition is performed through gas chromatography measurement, and Agilent's gas chromatography instrument (product name: Agilent 7890 GC, column: HP-5, carrier gas: helium (flow rate 2.4mL / min) , detector: F.I.D, injection volume: 1uL, initial value: 70°C/4.2min, final value: 280°C/7.8min, program rate: 15°C/min).
- Agilent's gas chromatography instrument product name: Agilent 7890 GC, column: HP-5, carrier gas: helium (flow rate 2.4mL / min) , detector: F.I.D, injection volume: 1uL, initial value: 70°C/4.2min, final value: 280°C/7.8min, program rate: 15°C/min).
- 'hardness' means Shore hardness (Shore "A” and / or Shore “D”) at 25 ° C., measured under the condition of 3T 10s, using ASTM D2240, and plasticized It can be an index for evaluating efficiency, and the lower the value, the better the plasticization efficiency.
- 'tensile strength' refers to a crosshead speed of 200 mm/min (1T) using a test device, U.T.M (manufacturer; Instron, model name: 4466) according to the ASTM D638 method. ) After pulling, the point where the specimen is cut is measured and calculated by Equation 1 below.
- Tensile strength (kgf/cm 2 ) load value (kgf) / thickness (cm) x width (cm)
- 'elongation rate' is measured by the ASTM D638 method, after pulling the cross head speed to 200 mm / min (1T) using the U.T.M., and then measuring the point where the specimen is cut After that, it is calculated by Equation 2 below.
- Elongation (%) length after extension / initial length x 100
- 'migration loss' refers to obtaining a test piece having a thickness of 2 mm or more in accordance with KSM-3156, attaching glass plates to both sides of the test piece, and then applying a load of 1 kgf/cm 2 . After the test piece is left in a hot air circulation oven (80° C.) for 72 hours, it is taken out and cooled at room temperature for 4 hours. Then, after removing the glass plate attached to both sides of the test piece, the weight of the glass plate and the specimen plate before and after being left in the oven is measured to calculate the transition loss by Equation 3 below.
- Transition loss (%) ⁇ (initial specimen weight - specimen weight after leaving the oven) / (initial specimen weight) ⁇ x 100
- 'volatile loss' refers to measuring the weight of a specimen after working the specimen at 80 ° C for 72 hours.
- Heating loss (wt%) ⁇ (initial specimen weight - specimen weight after operation) / (initial specimen weight) ⁇ x 100
- a propane tricarboxylate-based composition comprising at least one propane tricarboxylate of Formula 1 is included, and the alkyl group of the propane tricarboxylate includes an isomer mixture of hexyl alcohol and benzyl alcohol wherein the isomeric mixture of hexyl alcohol is 1-hexanol, 1-methylpentanol, 2-methylpentanol, 3-methylpentanol, 4-methylpentanol, 1,1-dimethylbutanol, 1,2-dimethylbutanol, 1,3-dimethylbutanol, 2,2-dimethylbutanol, 2,3-dimethylbutanol, 3,3-dimethylbutanol, 1-ethylbutanol, 2-ethylbutanol, 3-ethylbutanol and
- a tricarboxylate-based plasticizer composition comprising at least two selected from the group consisting of cyclopentyl methanol is
- R 1 to R 3 are each independently an n-hexyl group, a branched hexyl group, a cyclopentylmethyl group or a benzyl group.
- the plasticizer composition is a direct esterification reaction between 1,2,3-propane tricarboxylic acid or a derivative thereof and a hexyl alcohol mixture and an alcohol composition comprising benzyl alcohol, or a trialkyl 1,2,3-tricarboxylate and the alcohol It may be a product produced by a transesterification reaction between compositions, and the mixture of hexyl alcohols applied at this time may be a mixture of hexyl alcohols having different structures, that is, a mixture of structural isomers.
- the isomeric mixture of hexyl alcohol is 1-hexanol, 1-methylpentanol, 2-methylpentanol, 3-methylpentanol, 4-methylpentanol, 1,1-dimethylbutanol, 1,2 -Dimethylbutanol, 1,3-dimethylbutanol, 2,2-dimethylbutanol, 2,3-dimethylbutanol, 3,3-dimethylbutanol, 1-ethylbutanol, 2-ethylbutanol, 3-ethylbutanol and cyclopentyl methanol It may be one containing two or more selected from the group consisting of.
- R 1 to R in the above formula (1) Three alkyl groups may be determined, and the final composition may include various compositions in which three, two, or one isomeric alkyl groups and benzyl groups of hexyl alcohol are bonded to the three alkyl groups, respectively, and the ratio of components in the final composition is It can be determined according to the ratio of each structural isomer component in the reacting hexyl alcohol mixture and the ratio between the isomeric mixture of hexyl alcohol and benzyl alcohol in the alcohol composition.
- the alkyl group when the alkyl group is derived from an isomer mixture of hexyl alcohol and an alcohol composition containing benzyl alcohol, the alkyl group is derived from only the isomer mixture of hexyl alcohol. Improved transferability, heat loss and tensile strength can be exhibited, and the alkyl group can provide better mechanical properties than those derived from alcohols having less than 6 carbon atoms, and more specifically, tensile strength, elongation and heat loss It can be greatly improved, plasticization efficiency can be excellent, and migration resistance and stress resistance can be more excellent compared to the case where the alkyl group has more than 6 carbon atoms.
- the propane tricarboxylate-based composition may include at least one selected from among propane tricarboxylates represented by Chemical Formulas 2 to 7 below, and particularly preferably all propane tricarboxylates represented by Chemical Formulas 2 to 7 below. may include:
- R a is each an n-hexyl group, a branched hexyl group or a cyclopentylmethyl group
- R b is a benzyl group.
- each alkyl group derived from a mixture of hexyl alcohol isomers two alkyl groups derived from benzyl alcohol (Formulas 5 and 6) and all alkyl groups derived from benzyl alcohol (Formula 7) means
- the relative ratio of each tricarboxylate represented by Formulas 2 to 7 in the plasticizer composition of the present invention may vary depending on the composition ratio between the hexyl alcohol isomer mixture and benzyl alcohol in the alcohol composition used in the esterification reaction or the transesterification reaction. there is.
- the branching degree of the hexyl alcohol isomer mixture included in the alcohol composition of the present invention may be 2.0 or less, preferably 1.5 or less, and particularly preferably 1.0 or less. Specifically, the degree of branching may be 1.5 or less, may be 1.3 or less, and more preferably 1.1 or less. In addition, it may be 0.1 or more, may be 0.2 or more, may be 0.3 or more, and most preferably 0.7 or more. The degree of branching of this isomer mixture of hexyl alcohol can be maintained even in the tricarboxylate-based plasticizer composition produced from hexyl alcohol.
- the balance between physical properties may be broken and the product may fail to meet one or more evaluation criteria, but if it is less than 1.5 as a desirable range, mechanical properties as well as improvement of transition loss and heating loss can be more optimized The balance between physical properties can be excellent.
- the degree of branching may mean how many branching carbon atoms are attached to alkyl groups bound to materials included in the composition, and the degree may be determined according to the weight ratio of the material. For example, assuming that the alcohol mixture contains 60% by weight of n-hexyl alcohol, 30% by weight of methylpentyl alcohol, and 10% by weight of ethylbutyl alcohol, the number of branched carbon atoms of each alcohol is 0, 1 and 2, respectively. Bar, the degree of branching may be 0.5 calculated as [(60x0) + (30x1) + (10x2)] / 100. On the other hand, in defining the branching degree of the present invention, in the case of cyclopentyl methanol, the number of branched carbon atoms is considered to be 0.
- the hexyl alcohol isomer mixture may include 1-hexanol and 2-methylpentanol.
- 1-hexanol and 2-methylpentanol are included together in the isomer mixture, a balance between physical properties can be maintained, and an excellent effect can be obtained in terms of heating loss.
- it may further include 3-methylpentanol, and in this case, there is an advantage in that the balance between physical properties is very good.
- the branched hexyl alcohol including 2-methylpentanol may be included in an amount of 40 parts by weight or more, 50 parts by weight or more, 60 parts by weight or more, preferably 65 parts by weight or more, 70 parts by weight based on 100 parts by weight of the isomer mixture. More than one part may be included.
- the maximum amount may be entirely branched, and may be included in 99 parts by weight or less, 98 parts by weight, preferably 95 parts by weight or less, or 90 parts by weight or less. When branched hexyl alcohol is included in this range, mechanical properties can be improved.
- the linear alcohol of 1-hexanol may be included in an amount of 50 parts by weight or less, 40 parts by weight or less, and preferably 30 parts by weight or less, based on 100 parts by weight of the isomer mixture.
- the 1-hexanol may not be present in the component, but may be included in an amount of at least 2 parts by weight, and in this case, an advantage of improving mechanical properties while maintaining a balance between physical properties may be obtained. It is known that linear alcohol can produce excellent effects in theory, but in the present invention, different results were obtained from these theoretical results, and it was confirmed that the balance of physical properties was better than when an isomer mixture containing a branched alcohol was applied.
- the isomer mixture of hexyl alcohol may include 1-hexanol, 2-methylpentanol, 3-methylpentanol, and cyclopentyl methanol.
- cyclopentyl methanol by further including cyclopentyl methanol, mechanical properties may be slightly improved.
- the cyclopentyl methanol may be 20 parts by weight or less, preferably 15 parts by weight or less, based on 100 parts by weight of the isomer mixture, and may not exist, or the minimum amount to obtain the effect thereof may be 2 parts by weight.
- the weight ratio between the isomer mixture of hexyl alcohol and benzyl alcohol may be 90:10 to 10:90, preferably 90:10 to 30:70, particularly preferably may be 90:10 to 50:50.
- the plasticizer composition may have excellent plasticization efficiency and excellent migration resistance and stress resistance.
- a method for preparing a plasticizer composition according to an embodiment of the present invention is a method known in the art, and may be applied without particular limitation as long as the plasticizer composition described above can be prepared.
- the composition may be prepared by direct esterification of an alcohol composition comprising 1,2,3-propane tricarboxylic acid, an anhydride or derivative thereof, an isomer mixture of hexyl alcohol, and benzyl alcohol, and trialkyl 1,
- the composition may also be prepared by trans-esterification of an alcohol composition comprising an isomer mixture of 2,3-propane tricarboxylate and hexyl alcohol and benzyl alcohol.
- the plasticizer composition according to an embodiment of the present invention is a material prepared by appropriately performing the esterification reaction, and satisfies the above conditions, and the weight ratio between tricarboxylates for each series can be suitably adjusted. If it is, there is no particular limitation on the manufacturing method.
- an alcohol composition including an isomer mixture of 1,2,3-propane tricarboxylic acid or a derivative thereof, hexyl alcohol, and benzyl alcohol is added, followed by adding a catalyst and reacting under a nitrogen atmosphere. ; removing unreacted raw materials; Neutralizing (or inactivating) unreacted raw materials and catalysts; and filtering to remove impurities (eg, vacuum distillation, etc.).
- the components and weight ratios of the components of the hexyl alcohol isomer mixture are the same as described above.
- the alcohol composition comprising the isomer mixture of hexyl alcohol and benzyl alcohol is 200 to 900 mol%, 200 to 700 mol%, 200 to 600 mol%, 250 to 600 mol%, or 270 to 600 mol% based on 100 mol% of the acid. It can be used within the mol% range, and the component ratio in the final composition can be controlled by controlling the content of the alcohol.
- the catalyst is, for example, acid catalysts such as sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, p-toluenesulfonic acid, methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid, butanesulfonic acid, alkyl sulfuric acid, aluminum lactate, lithium fluoride, potassium chloride, cesium chloride, calcium chloride, It may be at least one selected from metal salts such as iron chloride and aluminum phosphate, metal oxides such as heteropolyacids, natural/synthetic zeolites, cation and anion exchange resins, organometallics such as tetraalkyl titanates and polymers thereof.
- acid catalysts such as sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, p-toluenesulfonic acid, methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid,
- tetraalkyl titanate may be used as the catalyst.
- p-toluenesulfonic acid, methanesulfonic acid, and the like may be suitable as an acid catalyst having a low activation temperature.
- the amount of the catalyst used may vary depending on the type, and for example, in the case of a homogeneous catalyst, it is in the range of 0.01 to 5% by weight, 0.01 to 3% by weight, 1 to 5% by weight, or 2 to 4% by weight based on 100% by weight of the total reactant. and in the case of a heterogeneous catalyst may be within the range of 5 to 200%, 5 to 100%, 20 to 200%, or 20 to 150% by weight of the total amount of reactants.
- reaction temperature may be within the range of 100 to 280 °C, 100 to 250 °C, or 120 to 230 °C.
- the transesterification reaction may be a reaction between trialkyl 1,2,3-propane tricarboxylate and an alcohol composition including an isomer mixture of hexyl alcohol and benzyl alcohol.
- the alkyl group of the trialkyl 1,2,3-propane tricarboxylate may preferably be a hexyl group or a benzyl group.
- hexyl group of the tricarboxylate is linear
- the isomeric mixture of alcohols contains branched alcohols, or, when the hexyl group of tricarboxylates is branched, the isomeric mixtures of hexyl alcohols contain linear alcohols, so that the finally obtained 1,2,3-propane tricarboxylate
- the alkyl group of may include both linear and branched hexyl groups.
- trans esterification reaction means a reaction in which an alcohol and an ester react as shown in the following Reaction Scheme 1, and R" of the ester is interchanged with R' of the alcohol, as shown in Scheme 1 below:
- the tricarboxylate included in the plasticizer composition according to the present invention depending on the position of the ester group bonding, three types may be formed, respectively, when two ester groups are exchanged and when one ester group is exchanged. Up to eight compounds may be mixed in the final composition. However, since two or more types of alkyl groups exist in the isomer mixture of hexyl alcohol according to the present invention, the types may be more diverse.
- the transesterification reaction has the advantage of not causing wastewater problems compared to the acid-alcohol esterification reaction.
- the composition ratio of the mixture prepared by the transesterification reaction may be controlled according to the amount of alcohol added.
- the amount of the alcohol added may be 0.1 to 200 parts by weight, specifically 1 to 150 parts by weight, more specifically 5 to 100 parts by weight, based on 100 parts by weight of the trialkyl 1,2,3-propane tricarboxylate compound.
- determining the component ratio in the final composition may be the amount of alcohol added as in the direct esterification reaction.
- the transesterification reaction is carried out at a reaction temperature of 120 to 190 ° C, preferably 135 to 180 ° C, more preferably 141 to 179 ° C for 10 minutes to 10 hours, preferably 30 It is preferably carried out from minutes to 8 hours, more preferably from 1 to 6 hours.
- the reaction time may be calculated from the time when the reaction temperature is reached after the temperature of the reactant is raised.
- the transesterification reaction may be carried out under an acid catalyst or a metal catalyst, and in this case, the reaction time is shortened.
- the acid catalyst may be, for example, sulfuric acid, methanesulfonic acid, or p-toluenesulfonic acid
- the metal catalyst may be, for example, an organic metal catalyst, a metal oxide catalyst, a metal salt catalyst, or a metal itself.
- the metal component may be, for example, any one selected from the group consisting of tin, titanium, and zirconium, or a mixture of two or more thereof.
- a step of distilling and removing unreacted alcohol and reaction by-products after the transesterification reaction may be further included.
- the distillation may be, for example, two-step distillation in which the alcohol and the reaction by-product are separated using a difference in boiling point.
- the distillation may be mixed distillation. In this case, there is an effect of relatively stably securing the ester-based plasticizer composition in a desired composition ratio.
- the mixed distillation means simultaneous distillation of unreacted alcohol and reaction by-products.
- a resin composition including the plasticizer composition and the resin described above is provided.
- Resins known in the art may be used as the resin.
- resins known in the art may be used as the resin.
- the resin in the group consisting of straight vinyl chloride polymers, paste vinyl chloride polymers, ethylene vinyl acetate copolymers, ethylene polymers, propylene polymers, polyketones, polystyrenes, polyurethanes, polylactic acids, natural rubbers, synthetic rubbers and thermoplastic elastomers.
- One or more selected mixtures may be used, but the present invention is not limited thereto.
- the plasticizer composition may be included in an amount of 5 to 150 parts by weight, preferably 5 to 130 parts by weight, or 10 to 120 parts by weight based on 100 parts by weight of the resin.
- the resin used in the plasticizer composition may be manufactured into a resin product through melt processing or plastisol processing, and the melt processing resin and plastisol processing resin may be produced differently according to each polymerization method.
- a vinyl chloride polymer when used for melt processing, it is produced by suspension polymerization and the like, and solid resin particles having a large average particle diameter are used.
- a vinyl chloride polymer is called a straight vinyl chloride polymer and is used for plastisol processing.
- a resin in a sol state as fine resin particles produced by emulsion polymerization or the like is used, and such a vinyl chloride polymer is called a paste vinyl chloride resin.
- the plasticizer is preferably included within the range of 5 to 80 parts by weight based on 100 parts by weight of the polymer, and in the case of the paste vinyl chloride polymer, 40 to 120 parts by weight based on 100 parts by weight of the polymer It is preferable to be included in
- the resin composition may further include a filler.
- the filler may be 0 to 300 parts by weight, preferably 50 to 200 parts by weight, more preferably 100 to 200 parts by weight based on 100 parts by weight of the resin.
- the filler may use a filler known in the art, and is not particularly limited.
- a filler known in the art, and is not particularly limited.
- it may be a mixture of at least one selected from silica, magnesium carbonate, calcium carbonate, hard coal, talc, magnesium hydroxide, titanium dioxide, magnesium oxide, calcium hydroxide, aluminum hydroxide, aluminum silicate, magnesium silicate, and barium sulfate.
- the resin composition may further include other additives such as a stabilizer, if necessary.
- additives such as the stabilizer may be 0 to 20 parts by weight, preferably 1 to 15 parts by weight, based on 100 parts by weight of the resin, for example.
- the stabilizer may be, for example, a calcium-zinc-based (Ca-Zn-based) stabilizer or a barium-zinc (Ba-Zn-based) stabilizer such as a calcium-zinc composite stearate, but is not particularly limited thereto. no.
- the resin composition can be applied to both melt processing and plastisol processing.
- melt processing can be applied to calendering processing, extrusion processing, or injection processing
- plastisol processing can be applied to coating processing, etc. this may apply.
- the alcohol composition of the isomer mixture of hexyl alcohol used herein is a mixture of 1-hexanol, 2-methylpentanol, 3-methylpentanol and cyclopentyl methanol at a weight ratio of 10:40:45:5.
- a plasticizer composition was obtained using an isomer mixture of hexyl alcohol in which 1-hexanol, 2-methylpentanol and 3-methylpentanol were mixed at a weight ratio of 20:35:45 .
- Example 2 The same procedure as in Example 1 was performed, except that 1-hexanol, 2-methylpentaol, 3-methylpentanol and cyclopentyl methanol were mixed in a weight ratio of 10:45:30:15 as an isomer mixture of hexyl alcohol.
- a plasticizer composition was obtained using
- Example 1 the same total weight of the isomer mixture of hexyl alcohol and benzyl alcohol was used, but the weight ratio between the two alcohols was 90:10 to obtain a plasticizer composition.
- Example 1 the total weight of the isomer mixture of hexyl alcohol and benzyl alcohol was the same, but the weight ratio between the two alcohols was 50:50 to obtain a plasticizer composition.
- Dioctyl phthalate (DOP, LG Chem) was used as a plasticizer.
- Diisononyl phthalate (DINP, LG Chem) was used as a plasticizer.
- Di(2-ethylhexyl) terephthalate (GL300, LG Chem) was used as a plasticizer.
- a composition comprising 6.3 wt%, 38.8 wt%, and 54.9 wt% of dibutyl terephthalate (DBTP), butyl (2-ethylhexyl) terephthalate (BEHTP) and di (2-ethylhexyl) terephthalate (DEHTP), respectively.
- DBTP dibutyl terephthalate
- BEHTP butyl (2-ethylhexyl) terephthalate
- DEHTP di (2-ethylhexyl) terephthalate
- a plasticizer composition was obtained in the same manner as in Example 1, except that 326.4 g of citric acid was used instead of 1,2,3-propane tricarboxylic acid.
- a plasticizer composition was obtained in the same manner as in Comparative Example 5, except that after the esterification reaction, acetic anhydride was added and acetylation was performed.
- a plasticizer composition was obtained in the same manner as in Example 1, except that only 1239.3 g of an isomer mixture of hexyl alcohol was used without using benzyl alcohol.
- a plasticizer composition was obtained in the same manner as in Example 1 except that only 1239.3 g of benzyl alcohol was used without using the isomer mixture of hexyl alcohol.
- a plasticizer composition was obtained in the same manner as in Example 1 except that 867.5 g of a single compound of 2-methylpentanol was used instead of the isomer mixture of hexyl alcohol.
- a plasticizer composition was obtained in the same manner as in Example 1 except that 820 g of a single n-butanol compound was used instead of the isomer mixture of hexyl alcohol.
- a plasticizer composition was obtained in the same manner as in Example 1, except that 1440 g of a single compound of 2-ethylhexanol was used instead of the isomer mixture of hexyl alcohol.
- CYP-M cyclopentyl methanol
- Tensile strength (kgf/cm 2 ) load value (kgf) / thickness (cm) x width (cm)
- the tensile residual ratio is to measure the ratio of tensile strength remaining in the specimen after leaving the specimen in an oven at 100 ° C. for 168 hours, and the measurement method is the same as the tensile strength measurement method described above.
- Elongation (%) length after elongation / initial length x 100.
- Residual elongation is to measure the ratio of elongation remaining in the specimen after leaving the specimen in an oven at 100 ° C. for 168 hours, and the measurement method is the same as the elongation measurement method described above.
- a test piece having a thickness of 2 mm or more was obtained according to KSM-3156, and a load of 1 kgf/cm 2 was applied after attaching glass plates to both sides of the 1T sample. After the specimen was left in a hot air circulation oven (80° C.) for 72 hours, it was taken out and cooled at room temperature for 4 hours. Then, after removing the glass plate attached to both sides of the test piece, the weight of the glass plate and the specimen plate before and after being left in the oven was measured, and the transition loss was calculated by the following formula.
- Transition loss (%) ⁇ (initial weight of test piece at room temperature - weight of test piece after leaving in oven) / initial weight of test piece at room temperature ⁇ x 100
- Stress test stress resistance: After leaving a specimen with a thickness of 2 mm bent at 23 ° C for 168 hours, the degree of transition (degree of oozing) was observed, and the result was recorded as a numerical value. The closer it was, the better the characteristics were.
- Example 1 85.3 37.5 222.9 105.6 325.9 94.8
- Example 2 85.5 37.7 228.7 108.7 328.7 95.7
- Example 3 85.5 37.4 230.4 106.5 330.2 96.4
- Example 4 85.1 37.3 218.7 115.6 330.5 93.4
- Comparative Example 7 85.1 37.3
- Comparative Examples 1 and 2 show excellent performance, but are phthalate-based existing products that have a problem of not being environmentally friendly. , suggesting that further improved performance can be implemented.
- Comparative Examples 3 and 4 are eco-friendly products that are used as substitutes for Comparative Examples 1 and 2, but have a problem in that migration performance and stress resistance are significantly inferior to existing products and Examples 1 to 5 of the present invention, In terms of plasticization efficiency, it is inferior to Examples 1 to 5 of the present invention.
- Comparative Examples 5 and 6 apply an isomer mixture of hexyl alcohol similarly to Examples 1 to 5 of the present invention, but apply citric acid or acetyl citric acid instead of 1,2,3-propane tricarboxylic acid.
- Comparative Example 5 in terms of plasticization efficiency, tensile properties, elongation properties, transferability and stress resistance, overall the results are inferior to those of Examples 1 to 5.
- Comparative Example 6 using acetyl citric acid it is inferior to Examples 1 to 5 in terms of plasticization efficiency and elongation, and is slightly inferior to Examples 1 to 5 in terms of migration loss and stress resistance.
- Comparative Examples 7 and 8 use only one of the isomer mixture of hexyl alcohol and benzyl alcohol as the alcohol composition. It is inferior to 1 to 5, and in the case of Comparative Example 8 using only benzyl alcohol, it is inferior to Examples 1 to 5 in terms of plasticization efficiency, elongation property, transferability and stress resistance. From this, it can be seen that by applying the isomer mixture of benzyl alcohol and hexyl alcohol together, the overall physical properties are improved due to the synergistic effect of the two alcohols, and the balance between each physical property is also excellently maintained.
- Comparative Example 9 instead of the isomer mixture of hexyl alcohol, 2-methylpentanol, one of the hexyl alcohols, was applied alone. .
- Comparative Examples 10 and 11 an alcohol having 4 carbon atoms other than hexyl alcohol was applied as an alcohol used together with benzyl alcohol (Comparative Example 10) or an alcohol having 8 carbon atoms was applied (Comparative Example 11).
- Comparative Example 11 exhibits a significant deterioration effect in terms of plasticization efficiency, elongation properties, transitivity and stress resistance.
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Abstract
Description
산 | 알코올 1(중량부) | 알코올 2 | 알코올 1: 알코올 2 중량비 | ||||
1-H | 2-MP | 3-MP | CYP-M | 종류 | |||
실시예 1 | PTCA | 10 | 40 | 45 | 5 | BA | 70:30 |
실시예 2 | PTCA | 20 | 35 | 45 | 0 | BA | 70:30 |
실시예 3 | PTCA | 10 | 45 | 30 | 15 | BA | 70:30 |
실시예 4 | PTCA | 10 | 40 | 45 | 5 | BA | 90:10 |
실시예 5 | PTCA | 10 | 40 | 45 | 5 | BA | 50:50 |
비교예 1 | DOP | - | |||||
비교예 2 | DINP | - | |||||
비교예 3 | DOTP | - | |||||
비교예 4 | DBTP, BOTP 및 DOTP의 혼합물(각 6.3 중량%, 38.8 중량%, 54.9 중량%) | - | |||||
비교예 5 | CA | 10 | 40 | 45 | 5 | BA | 70:30 |
비교예 6 | ACA | 10 | 40 | 45 | 5 | BA | 70:30 |
비교예 7 | PTCA | 10 | 40 | 45 | 5 | - | 100:0 |
비교예 8 | PTCA | 0 | 0 | 0 | 0 | BA | 0:100 |
비교예 9 | PTCA | 0 | 100 | 0 | 0 | BA | 70:30 |
비교예 10 | PTCA | n-부탄올 사용 | BA | 70:30 | |||
비교예 11 | PTCA | 2-에틸헥산올 사용 | BA | 70:30 |
가소화 효율 | 인장 특성 | 신장 특성 | ||||
Shore A | Shore D | 인장강도 (kgf/cm2) |
인장 잔율 (%) |
신율 (%) |
신장 잔율 (%) |
|
실시예 1 | 85.3 | 37.5 | 222.9 | 105.6 | 325.9 | 94.8 |
실시예 2 | 85.5 | 37.7 | 228.7 | 108.7 | 328.7 | 95.7 |
실시예 3 | 85.5 | 37.4 | 230.4 | 106.5 | 330.2 | 96.4 |
실시예 4 | 85.1 | 37.3 | 218.7 | 115.6 | 330.5 | 93.4 |
실시예 5 | 85.7 | 37.9 | 231.4 | 118.4 | 342.0 | 96.1 |
비교예 1 | 87.0 | 40.3 | 212.0 | 123.0 | 311.7 | 82.7 |
비교예 2 | 89.0 | 42.4 | 225.0 | 100.9 | 319.5 | 93.6 |
비교예 3 | 90.8 | 43.9 | 243.0 | 99.7 | 334.7 | 92.7 |
비교예 4 | 87.5 | 41.1 | 233.6 | 124.7 | 325.8 | 84.8 |
비교예 5 | 87.2 | 40.5 | 212.4 | 102.0 | 308.6 | 88.9 |
비교예 6 | 92.4 | 45.3 | 227.6 | 105.4 | 288.7 | 93.2 |
비교예 7 | 85.1 | 37.3 | 214.8 | 120.5 | 334.0 | 93.2 |
비교예 8 | 95.7 | 48.9 | 220.7 | 100.2 | 268.7 | 98.8 |
비교예 9 | 86.0 | 38.0 | 214.3 | 102.4 | 307.8 | 92.0 |
비교예 10 | 82.1 | 33.8 | 198.9 | 76.5 | 324.1 | 65.4 |
비교예 11 | 93.4 | 46.5 | 232.5 | 101.1 | 254.3 | 88.6 |
이행손실 (%) |
가열감량 (%) |
내스트레스성 | |||
1일 | 3일 | 5일 | |||
실시예 1 | 0.97 | 0.92 | 0.5 | 0.5 | 0 |
실시예 2 | 0.87 | 0.78 | 0.5 | 0.5 | 0 |
실시예 3 | 0.89 | 0.75 | 0.5 | 0.5 | 0 |
실시예 4 | 1.02 | 1.00 | 0.5 | 0.5 | 0 |
실시예 5 | 0.76 | 0.69 | 0.5 | 0 | 0 |
비교예 1 | 1.49 | 1.86 | 0 | 0 | 0 |
비교예 2 | 1.94 | 0.85 | 0.5 | 0.5 | 0 |
비교예 3 | 6.40 | 0.94 | 1 | 2.5 | 3 |
비교예 4 | 5.17 | 3.21 | 0.5 | 1.5 | 2.5 |
비교예 5 | 1.54 | 0.77 | 0.5 | 1 | 1 |
비교예 6 | 4.05 | 0.66 | 1 | 2 | 2 |
비교예 7 | 2.05 | 1.41 | 0.5 | 0.5 | 0 |
비교예 8 | 4.85 | 0.47 | 2 | 2 | 3 |
비교예 9 | 1.21 | 1.10 | 0.5 | 0.5 | 0.5 |
비교예 10 | 1.04 | 5.66 | 0.5 | 0.5 | 0 |
비교예 11 | 7.58 | 0.35 | 2 | 2 | 3 |
Claims (13)
- 하기 화학식 1의 프로판 트리카복실레이트가 1 이상 포함된 프로판 트리카복실레이트계 조성물을 포함하고,상기 프로판 트리카복실레이트의 알킬기는 헥실 알코올의 이성질체 혼합물 및 벤질 알코올을 포함하는 알코올 조성물로부터 유래되며,상기 헥실 알코올의 이성질체 혼합물은 1-헥산올, 1-메틸펜탄올, 2-메틸펜탄올, 3-메틸펜탄올, 4-메틸펜탄올, 1,1-디메틸부탄올, 1,2-디메틸부탄올, 1,3-디메틸부탄올, 2,2-디메틸부탄올, 2,3-디메틸부탄올, 3,3-디메틸부탄올, 1-에틸부탄올, 2-에틸부탄올, 3-에틸부탄올 및 사이클로펜틸 메탄올로 이루어진 군에서 선택된 2 이상을 포함하는 것인 트리카복실레이트계 가소제 조성물:[화학식 1]상기 화학식 1에서,R1 내지 R3는 각각 독립적으로, n-헥실기, 분지형 헥실기, 사이클로펜틸메틸기 또는 벤질기이다.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물은 분지화도가 2.0 이하인 것인 가소제 조성물.
- 제3항에 있어서,상기 헥실 알코올의 이성질체 혼합물은 분지화도가 1.5 이하인 것인 가소제 조성물.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물은 1-헥산올, 2-메틸펜탄올 및 3-메틸펜탄올을 포함하는 것인 가소제 조성물.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물은, 이성질체 혼합물 100 중량부에 대하여, 분지형 알코올이 40 중량부 이상으로 포함되는 것인 가소제 조성물.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물은, 이성질체 혼합물 100 중량부에 대하여, 분지형 알코올이 50 내지 95 중량부로 포함되는 것인 가소제 조성물.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물은, 이성질체 혼합물 100 중량부에 대하여, 1-헥산올이 40 중량부 이하로 포함되는 것인 가소제 조성물.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물은 1-헥산올, 2-메틸펜탄올, 3-메틸펜탄올 및 사이클로펜틸 메탄올을 포함하는 것인 가소제 조성물.
- 제9항에 있어서,상기 헥실 알코올의 이성질체 혼합물은, 이성질체 혼합물 100 중량부에 대하여, 사이클로펜틸 메탄올이 20 중량부 이하로 포함되는 것인 가소제 조성물.
- 제1항에 있어서,상기 헥실 알코올의 이성질체 혼합물 및 벤질 알코올 사이의 중량비는 90:10 내지 10:90인 가소제 조성물.
- 수지 100 중량부; 및 제1항의 가소제 조성물 5 내지 150 중량부;를 포함하는 수지 조성물.
- 제12항에 있어서,상기 수지는 스트레이트 염화비닐 중합체, 페이스트 염화비닐 중합체, 에틸렌 비닐 아세테이트 공중합체, 에틸렌 중합체, 프로필렌 중합체, 폴리케톤, 폴리스티렌, 폴리우레탄, 폴리락틱산, 천연고무 및 합성고무로 이루어진 군에서 선택된 1 종 이상인 것인 수지 조성물.
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Publication number | Priority date | Publication date | Assignee | Title |
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US2628249A (en) * | 1951-01-03 | 1953-02-10 | Pittsburgh Coke & Chemical Co | Esterification process |
KR20150076162A (ko) * | 2012-10-29 | 2015-07-06 | 아처 다니엘 미드랜드 캄파니 | 탄산염을 이용한 카복실산의 알코올 매개 에스테르화 |
KR20210014597A (ko) * | 2019-07-30 | 2021-02-09 | 주식회사 엘지화학 | 시트레이트계 가소제 조성물 및 이를 포함하는 수지 조성물 |
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US2628249A (en) * | 1951-01-03 | 1953-02-10 | Pittsburgh Coke & Chemical Co | Esterification process |
KR20150076162A (ko) * | 2012-10-29 | 2015-07-06 | 아처 다니엘 미드랜드 캄파니 | 탄산염을 이용한 카복실산의 알코올 매개 에스테르화 |
KR20210014597A (ko) * | 2019-07-30 | 2021-02-09 | 주식회사 엘지화학 | 시트레이트계 가소제 조성물 및 이를 포함하는 수지 조성물 |
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LIU MINGYANG, ZHANG ZHANRONG, LIU HUIZHEN, XIE ZHENBING, MEI QINGQING, HAN BUXING: "Transformation of alcohols to esters promoted by hydrogen bonds using oxygen as the oxidant under metal-free conditions", vol. 4, 5 October 2018 (2018-10-05), pages eaas9319, XP093060043 * |
MAGNE FRANK C., ROBERT R. MOD: "Plasticizers from aconitic and tricarballylic acids", INDUSTRIAL AND ENGINEERING CHEMISTRY, vol. 45, no. 7, 1 July 1953 (1953-07-01), pages 1546 - 1547, XP093059957 * |
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