WO2015147202A1 - 脂環骨格を有するポリエステルポリオール - Google Patents
脂環骨格を有するポリエステルポリオール Download PDFInfo
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- WO2015147202A1 WO2015147202A1 PCT/JP2015/059455 JP2015059455W WO2015147202A1 WO 2015147202 A1 WO2015147202 A1 WO 2015147202A1 JP 2015059455 W JP2015059455 W JP 2015059455W WO 2015147202 A1 WO2015147202 A1 WO 2015147202A1
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- WIPO (PCT)
- Prior art keywords
- polyester polyol
- acid
- alicyclic skeleton
- side chain
- propanediol
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Classifications
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- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/423—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing cycloaliphatic groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/20—Dihydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/58—Unsaturated compounds containing ether groups, groups, groups, or groups
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- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
- C08G63/199—Acids or hydroxy compounds containing cycloaliphatic rings
Definitions
- the present invention relates to a polyester polyol used as a raw material for polyurethane, a method for producing the same, a method for producing polyurethane using the polyester polyol obtained thereby, and a polyurethane obtained thereby. More specifically, the polyester polyol and the method for producing the same according to the present invention relate to a technique capable of suppressing gelation in a urethanization reaction.
- Polyurethane is a useful resin with a wide range of applications, being used in fields such as paints, adhesives, coatings, elastomers, artificial and synthetic leather, foams, and active energy ray curable resins.
- polyurethane has various characteristics depending on the structure of the polyol that constitutes it.
- Polyester polyols containing an alcohol having an alicyclic skeleton in the side chain as a diol component are highly useful because a polyurethane having excellent vibration damping properties and hydrolysis resistance can be obtained (Patent Documents 1 and 2).
- Patent Document 3 a method of synthesizing from an aldehyde having an alicyclic skeleton and formaldehyde has been proposed (Patent Document 3).
- the present inventors use a polyester polyol containing a diol having an alicyclic skeleton in the side chain and a dibasic acid component as components as a polyester polyol having a alicyclic skeleton in the side chain, which is useful as a raw material for polyurethane.
- a polyester polyol containing a diol having an alicyclic skeleton in the side chain and a dibasic acid component as components as a polyester polyol having a alicyclic skeleton in the side chain, which is useful as a raw material for polyurethane.
- An object of the present invention is to solve the above-mentioned problems, and to provide a polyester polyol capable of producing a stable quality polyurethane by suppressing gelation in a urethanization reaction in the production of polyurethane. .
- the inventors have found that gelation in the urethanization reaction is caused by an alkali metal contained in a small amount in the polyester polyol, and further, the alkali metal has 1,3-3-alicyclic skeleton in the side chain. It discovered that it originated in propanediol, solved the said subject by using the polyester polyol which reduced alkali metal content, and came to complete this invention. That is, the present invention provides the following [1] to [6].
- the polyester polyol of the present invention can suppress gelation in the urethanization reaction in the production of polyurethane, and can produce a polyurethane of stable quality.
- a method for producing polyurethane, polyurethane, and 1,3-propanediol having an alicyclic skeleton in the side chain are provided.
- a dibasic acid component used in a general polyester polyol can be used without particular limitation, for example, succinic acid, glutaric acid, adipic acid, pimelic acid, Aliphatic dibasic acids such as suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, brassic acid, dimer acid; alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid; phthalic acid, isophthalic acid, terephthalic acid, And aromatic dibasic acids such as naphthalenedicarboxylic acid.
- adipic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid are preferably used in consideration of availability.
- These dibasic acids may be used individually by 1 type, or may use 2 or more types together.
- the alicyclic skeleton of 1,3-propanediol having an alicyclic skeleton in the side chain constituting the polyester polyol of the present invention is not particularly limited, but those having 3 to 10 carbon atoms are preferable. There may be one alicyclic skeleton in the molecule or two or more. Specific examples of the compound include cyclopropane-1,1-dimethanol, cyclobutane-1,1-dimethanol, cyclopentane-1,1-dimethanol, cyclohexane-1,1-dimethanol, and 2-methyl.
- cyclohexane-1,1-dimethanol is preferred. These may be used individually by 1 type, or may use 2 or more types together.
- the 1,3-propanediol having an alicyclic skeleton in the side chain of the present invention has an alkali metal content of 40 mass ppm or less, preferably an alkali metal content of 20 mass ppm or less, preferably 8 mass ppm or less. Is more preferably 4 ppm by mass or less, and particularly preferably 2 ppm by mass or less.
- the 1,3-propanediol having an alicyclic skeleton in the side chain of the present invention is preferably cyclohexane-1,1-dimethanol.
- the polyester polyol of the present invention may contain a polyhydric alcohol component (preferably a diol) other than 1,3-propanediol having an alicyclic skeleton in the side chain as a constituent component.
- a polyhydric alcohol component preferably diol
- a polyhydric alcohol component used in general polyester polyols can also be used.
- the amount of the other polyhydric alcohol component (preferably diol) is usually preferably 50 mol% or less and 30 mol% or less with respect to 1,3-propanediol having an alicyclic skeleton in the side chain. Is more preferable.
- the amount ratio of 1,3-propanediol having an alicyclic skeleton in the side chain as a constituent component and the dibasic acid component is the same as that of the other polyhydric alcohol component (preferably diol) described above.
- the number of structural units) is preferably in the range of 1.4: 1 to 1.01: 1, more preferably in the range of 1.2: 1 to 1.04: 1, and 1.1: 1 to 1.05: 1. Is more preferable.
- the average molecular weight of the polyester polyol of the present invention is not particularly limited, but is preferably 300 to 4000, more preferably 350 to 3500, and particularly preferably 450 to 3000.
- the average molecular weight of the polyester polyol is 300 or more, the hydroxyl group concentration is sufficiently diluted, and gelation hardly occurs during urethanization.
- the average molecular weight of the polyester polyol is 4000 or less, the viscosity in the dissolved state is low, and handling during urethanization becomes easy.
- an average molecular weight is a number average molecular weight computed from the hydroxyl value of the produced
- polyester polyol of the present invention preferably has a melting point of 25 ° C. or lower.
- Polyester polyol can be in the form of solid, wax, liquid, etc. depending on its structure and molecular weight, but the liquid form is excellent in handling from the viewpoint of saving labor and energy required for dissolution.
- the polyester polyol of the present invention has an alkali metal content of 20 mass ppm or less, preferably 10 mass ppm or less, more preferably 4 mass ppm or less, further preferably 2 mass ppm or less, and 1.5 mass ppm or less. Particularly preferred is 1 ppm by mass or less.
- the production method of the polyester polyol of the present invention is not particularly limited as long as the alkali metal content is 20 ppm by mass or less.
- the method for producing a polyester polyol by performing a transesterification reaction with 1,3-propanediol having an alicyclic skeleton in the side chain of the present invention using a dibasic acid component as a raw material A small amount of polyester polyol can be easily produced.
- Dialkyl esters of dibasic acid components used in this reaction include aliphatic dibasic acids such as succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, brassic acid, and dimer acid.
- aliphatic dibasic acids such as succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, brassic acid, and dimer acid.
- Dialkyl esters such as dimethyl ester, diethyl ester, dipropyl ester and dibutyl ester; dimethyl ester of alicyclic dicarboxylic acid such as 1,4-cyclohexanedicarboxylic acid, dialkyl ester such as diethyl ester, dipropyl ester and dibutyl ester Dimethyl esters of aromatic dibasic acids such as phthalic acid, isophthalic acid, terephthalic acid and naphthalenedicarboxylic acid, dialkyl esters such as diethyl ester, dipropyl ester and dibutyl ester.
- dialkyl esters of adipic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid in view of availability.
- the alkali metal content in the dialkyl ester of the dibasic acid component is preferably 2 mass ppm or less, more preferably 1.5 mass ppm or less, and even more preferably 1 mass ppm or less.
- 1,3-propanediol having an alicyclic skeleton in the side chain 1,3-propanediol having an alicyclic skeleton in the side chain described above can be used.
- the polyester polyol of the present invention is an esterification reaction or transesterification of the dibasic acid component or dialkyl ester of the dibasic acid component described above as a raw material and 1,3-propanediol having an alicyclic skeleton in the side chain. It is obtained by reacting.
- As the esterification reaction or transesterification reaction a method generally used as an esterification reaction or transesterification reaction in an organic synthesis reaction can be applied.
- the desired polyester polyol can be obtained by heat condensation of propanediol.
- the temperature of the esterification reaction or transesterification reaction is usually 140 to 240 ° C, preferably 180 to 220 ° C.
- an inert gas such as nitrogen or argon
- the esterification reaction or transesterification reaction may be carried out in the presence of a solvent that does not affect the reaction, but is usually preferably carried out without a solvent.
- the esterification reaction or transesterification reaction is preferably performed in the presence of a catalyst.
- catalysts include titanium compounds such as tetrabutyl titanate, tetraisopropyl titanate, tetra-2-ethylhexyl titanate, titanium acetylacetonate; tin compounds such as dibutyltin oxide, methylphenyltin oxide, hexaethyltin oxide; magnesium carbonate, oxidation
- Magnesium compounds such as magnesium and magnesium alkoxide are preferable, and titanium compounds such as tetrabutyl titanate, tetraisopropyl titanate, tetra-2-ethylhexyl titanate, and titanium acetylacetonate are more preferable.
- the amount of the catalyst used is not particularly limited, but it is usually preferably in the range of 0.5 to 500 ppm by mass with respect to the polyhydric alcohol in terms of metal atom, and preferably in the range of 1 to 100 ppm by mass. More preferred is 2 to 50 ppm by mass. If the amount of the catalyst used is 0.5 mass ppm or more, the polyester polyol can be formed quickly, which is economically advantageous due to a reduction in time. On the other hand, if the amount of the catalyst used is 500 ppm by mass or less, removal and deactivation of the catalyst after the reaction are easy.
- the catalyst used when producing the polyester polyol acts as a catalyst in the later urethanization reaction. Desirably, it is desirable to completely deactivate the catalyst.
- a catalyst deactivation method a catalyst deactivation method used in the production of general polyester polyols can be applied. For example, when a titanium compound is used as a catalyst, there are a method of adding water or a phosphorus compound to deactivate the catalyst, a method of adding a phosphorus compound after adding water, etc. In terms of reduction, a method of further adding a phosphorus compound after adding water is preferable.
- Heating with addition of water in deactivating the catalyst is not particularly limited, but generally a temperature of 70 to 120 ° C is preferable, and a temperature of 90 to 120 ° C is particularly preferable.
- the heat treatment time is not particularly limited, but is usually about 1 to 3 hours.
- Phosphorous compounds to be added include phosphorous acid, phosphoric acid, dimethyl phosphite, diisopropyl phosphite, di-n-butyl phosphite, isobutyl phosphite, di-n-ethylhexyl phosphite, phosphorous acid Dilauryl, dioleyl phosphite, distearyl phosphite, diphenyl phosphite, monomethyl phosphite, monoethyl phosphite, dimethyl phosphate, diethyl phosphate, diisopropyl phosphate, di-n-butyl phosphate, phosphoric acid Examples thereof include isobutyl, di-n-ethylhexyl phosphate, dilauryl phosphate, dioleyl phosphate, distearyl phosphate, diphenyl phosphate, monomethyl phosphate and monoe
- phosphorous acid diphenyl phosphite, distearyl phosphite, and diphenyl phosphate are preferable.
- the polyester polyol manufactured above when using the polyester polyol manufactured above as a raw material of a polyurethane, it is good to remove and use water from the polyester polyol manufactured above.
- the removal of water is preferably performed after the addition of the phosphorus compound, but is not limited thereto, and may be performed after the heat treatment by adding water and before the addition of the phosphorus compound. Water can be removed by any method such as heat drying under reduced pressure. As described above, the polyester polyol of the present invention can be obtained.
- the manufacturing method of the polyurethane in this invention includes the process of making polyester polyol and polyisocyanate react.
- the polyurethane of the present invention can be obtained by the production method.
- a method used as a general urethanization reaction of a polyester polyol can be applied.
- isocyanate examples include diphenylmethane-4,4′-diisocyanate (hereinafter abbreviated as MDI), tolylene diisocyanate, 1,5-naphthalene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, hydrogenated MDI and the like.
- MDI diphenylmethane-4,4′-diisocyanate
- tolylene diisocyanate 1,5-naphthalene diisocyanate
- xylylene diisocyanate xylylene diisocyanate
- isophorone diisocyanate hexamethylene diisocyanate
- hydrogenated MDI hydrogenated MDI and the like.
- chain extenders such as a low molecular polyol and polyamine, etc. can be used together as needed.
- the chain extender is not particularly limited, but is a low molecular compound having at least two active hydrogen atoms mainly composed of an aliphatic diol having 2 to 20 carbon atoms (hereinafter simply referred to as “low molecular compound having an active hydrogen atom”). Is preferred).
- the low molecular compound having an active hydrogen atom include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and 3-methyl-1,5.
- the reactivity of the polyester polyol of the present invention can be evaluated by, for example, reacting the polyester polyol and MDI at 50 ° C. and measuring the apparent reaction rate constant.
- a large apparent reaction rate constant means that the reaction rate between the polyester polyol and the isocyanate is high.
- the urethanization reaction is an exothermic reaction, if the reaction rate is too high, the system is locally localized. Abnormal overheating, side reactions may occur, and in some cases, undesirable results such as gelation may occur. Therefore, in order to obtain a stable quality polyurethane, usually is the apparent reaction rate constant at 50 ° C. with MDI 0.01kg ⁇ mol -1 ⁇ min -1 or more, 0.1kg ⁇ mol -1 ⁇ min -1 or less is preferable.
- the polyurethane obtained by the method of the present invention has excellent mechanical strength and hydrolysis resistance under acidic and basic conditions, and is a sheet, film, foam, roll, gear, solid tire, belt, hose, tube. , Packing materials, anti-vibration materials, shoe soles, sports shoes, machine parts, building materials, automobile parts, furniture, lining, sealing materials, waterproofing materials, sports equipment, elastic fibers, artificial leather, textile treatment agents, adhesives, It can be suitably used for applications such as coating agents, various binders and paints.
- Example 1 Charge 133.4 g of adipic acid and 179.4 g of 1,1-cyclohexanedimethanol having a sodium atom content of 7.6 ppm by mass to the reactor, and heat to 200 ° C. under a nitrogen atmosphere at normal pressure. The esterification reaction was carried out while distilling out. When the amount of produced water was reduced, 5 mg of tetraisopropyl titanate was added, and the reaction was continued under reduced pressure. Next, 5 g of water (corresponding to 2% by weight with respect to the theoretical yield) was added and stirred at 100 ° C. for 2 hours.
- polyester polyol having a number average molecular weight of 2120.
- the sodium atom content in the obtained polyester polyol was 3.7 mass ppm.
- reaction rate constant of the obtained polyester polyol was examined by the above-described measuring method, it was 0.08 kg ⁇ mol ⁇ 1 ⁇ min ⁇ 1 .
- Example 1 A polyester polyol was obtained in the same manner as in Example 1 except that 1,1-cyclohexanedimethanol having a sodium atom content of 213.6 mass ppm was used.
- the obtained polyester polyol had a sodium atom content of 103.2 ppm by mass, and when examined by the reaction rate constant measurement method described above, there was a significant increase in internal temperature immediately after the start of the reaction, which caused gelation and could not be measured. there were. From this comparative example, it can be seen that the polyester polyol using 1,1-cyclohexanedimethanol containing an alkali metal as a raw material has a remarkably high reaction rate with isocyanate and is likely to cause gelation.
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Abstract
Description
本発明の目的は、上記の問題点を解決するものであり、ポリウレタンの製造の際のウレタン化反応におけるゲル化を抑制し、安定した品質のポリウレタンを製造し得るポリエステルポリオールを提供することにある。
すなわち、本発明は、下記[1]~[6]を提供する。
[1] 側鎖に脂環骨格を有する1,3-プロパンジオールと、二塩基酸成分とを構成成分として含む、アルカリ金属含有量が20質量ppm以下である、ポリエステルポリオール;
[2] 前記側鎖に脂環骨格を有する1,3-プロパンジオールが、シクロヘキサン-1,1-ジメタノールである、[1]に記載のポリエステルポリオール;
[3] [1]又は[2]に記載のポリエステルポリオールと、ポリイソシアネートとを反応させるポリウレタンの製造方法;
[4] [3]に記載の製造方法で得られるポリウレタン;
[5] アルカリ金属含有量が40質量ppm以下の、側鎖に脂環骨格を有する1,3-プロパンジオール;および
[6] シクロヘキサン-1,1-ジメタノールである、[5]に記載の側鎖に脂環骨格を有する1,3-プロパンジオール。
本発明によれば、二塩基酸成分と、側鎖に脂環骨格を有する1,3-プロパンジオールとを構成成分として含む、アルカリ金属含有量が20質量ppm以下である、ポリエステルポリオールが提供される。さらに、ポリウレタンの製造方法、及びポリウレタン、並びに側鎖に脂環骨格を有する1,3-プロパンジオールが提供される。
本発明のポリエステルポリオールを構成する二塩基酸成分としては、一般的なポリエステルポリオールにおいて使用される二塩基酸成分を特に制限なく用いることができ、例えばコハク酸、グルタル酸、アジピン酸、ピメリン酸、スベリン酸、アゼライン酸、セバシン酸、ドデカン二酸、ブラシル酸、ダイマー酸などの脂肪族二塩基酸;1,4-シクロヘキサンジカルボン酸などの脂環式ジカルボン酸;フタル酸、イソフタル酸、テレフタル酸、ナフタレンジカルボン酸などの芳香族二塩基酸などが挙げられる。中でも、入手性などを加味すると、アジピン酸、アゼライン酸、セバシン酸、テレフタル酸、イソフタル酸、ナフタレンジカルボン酸を用いるのが好ましい。これらの二塩基酸は一種を単独で使用しても、二種以上を併用してもよい。
本発明の側鎖に脂環骨格を有する1,3-プロパンジオールは、アルカリ金属含有量が40質量ppm以下であり、アルカリ金属含有量が20質量ppm以下であることが好ましく、8質量ppm以下であることがより好ましく、4質量ppm以下であることがさらに好ましく、2質量ppm以下であることが特に好ましい。本発明の側鎖に脂環骨格を有する1,3-プロパンジオールはシクロヘキサン-1,1-ジメタノールであることが好ましい。
触媒を失活させる際の、水を加えての加熱は、特に制限されないが、一般に70~120℃の温度が好ましく、90~120℃の温度が特に好ましい。この加熱処理時間は、特に限定されないが、通常約1~3時間程度行うとよい。
以上のようにして、本発明のポリエステルポリオールを得ることができる。
本発明におけるポリウレタンの製造方法は、ポリエステルポリオールと、ポリイソシアネートとを反応させる工程を含む。本発明のポリウレタンは、該製造方法により得られる。
本発明のポリエステルポリオールを用いてポリウレタンを製造する場合、一般的なポリエステルポリオールのウレタン化反応として用いられている方法を適用できる。イソシアネートとしては、例えばジフェニルメタン-4,4’-ジイソシアネート(以下、MDIと略称する。)、トリレンジイソシアネート、1,5-ナフタレンジイソシアネート、キシリレンジイソシアネート、イソホロンジイソシアネート、ヘキサメチレンジイソシアネート、水添MDIなどの慣用のイソシアネートを使用できる。また、必要に応じて低分子ポリオールやポリアミン等の鎖伸長剤等を共に使用できる。鎖伸長剤としては特に限定されないが、炭素数2~20の脂肪族ジオールを主体とする活性水素原子を少なくとも2個有する低分子化合物(以下、単に「活性水素原子を有する低分子化合物」ということがある)を用いることが好ましい。活性水素原子を有する低分子化合物としては、例えばエチレングリコール、1,3-プロパンジオール、1,4-ブタンジオール、1,5-ペンタンジオール、1,6-ヘキサンジオール、3-メチル-1,5-ペンタンジオール、1,8-オクタンジオール、1,9-ノナンジオール、キシリレングリコール、ビスヒドロキシベンゼン、ネオペンチルグリコール、トリメチロールプロパン、グリセリン、3,3-ジクロロ-4,4’-ジアミノジフェニルメタン、イソホロンジアミン、4,4’-ジアミノジフェニルメタン等が挙げられる。
後述の実施例および比較例で得られたポリエステルポリオール15mmolとMDI(ジフェニルメタン-4,4’-ジイソシアネート)15mmolを、50℃のオイルバスにつけた三口フラスコ中、窒素下で30分間反応させ、系内のイソシアネート基の減少量を追跡して反応速度定数(kg・mol-1・min-1)を求めた。反応速度定数が高くなるにつれ、反応制御が困難になることを表す。
アジピン酸133.4g、ナトリウム原子含量が7.6質量ppmの1,1-シクロヘキサンジメタノール179.4gを反応器に仕込み、窒素雰囲気下、常圧で200℃に加熱し、生成する水を系外に留去しながらエステル化反応を行なった。生成する水の留出が少なくなった段階で、テトライソプロピルチタネート5mgを添加し、減圧しながら反応を続けた。次に、水5g(理論収量に対して2重量%相当)を添加し、100℃で2時間攪拌した。その後、リン酸ジフェニルを0.02g添加して、減圧下で水を留去し、数平均分子量2120のポリエステルポリオールを得た。得られたポリエステルポリオール中のナトリウム原子含量は、3.7質量ppmであった。
得られたポリエステルポリオールの反応速度定数を上記した測定方法により調べたところ、0.08kg・mol-1・min-1であった。
ナトリウム原子含量が213.6質量ppmの1,1-シクロヘキサンジメタノールを用いた以外は実施例1と同様にしてポリエステルポリオールを得た。得られたポリエステルポリオール中のナトリウム原子含量は、103.2質量ppmであり、上記した反応速度定数測定方法により調べたところ、反応開始直後から著しい内温上昇があり、ゲル化してしまい測定不能であった。この比較例から、アルカリ金属を含有する1,1-シクロヘキサンジメタノールを原料として用いたポリエステルポリオールでは、イソシアネートとの反応速度が著しく高く、ゲル化を引き起こしやすいことが分かる。
本出願は、2014年3月28日出願の日本特許出願(特願2014-70036)に基づくものであり、その内容はここに参照として取り込まれる。
Claims (6)
- 側鎖に脂環骨格を有する1,3-プロパンジオールと、二塩基酸成分とを構成成分として含む、アルカリ金属含有量が20質量ppm以下である、ポリエステルポリオール。
- 前記側鎖に脂環骨格を有する1,3-プロパンジオールが、シクロヘキサン-1,1-ジメタノールである、請求項1に記載のポリエステルポリオール。
- 請求項1又は2に記載のポリエステルポリオールと、ポリイソシアネートとを反応させるポリウレタンの製造方法。
- 請求項3に記載の製造方法で得られるポリウレタン。
- アルカリ金属含有量が40質量ppm以下の、側鎖に脂環骨格を有する1,3-プロパンジオール。
- シクロヘキサン-1,1-ジメタノールである、請求項5に記載の側鎖に脂環骨格を有する1,3-プロパンジオール。
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CN201580016805.8A CN106164129A (zh) | 2014-03-28 | 2015-03-26 | 具有脂环骨架的聚酯多元醇 |
US15/300,104 US20170183442A1 (en) | 2014-03-28 | 2015-03-26 | Polyester polyol having alicyclic skeleton |
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