Shaanxi BLOOM Tech Co., Ltd. yog ib tug ntawm cov uas paub txog manufacturers thiab lwm tus neeg ntawm 2,2-bis (hydroxymethyl) butyric acid cas 10097-02-6 nyob rau hauv Suav teb. Txais tos rau cov lag luam wholesale zoo 2,2-bis (hydroxymethyl) butyric acid cas 10097-02-6 muag ntawm no los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.
2,2-Bis (hydroxymethyl) butyric acidyog ib yam tshuaj uas muaj cov mis molecular C6H12O4, uas yog dawb siv lead ua. Soluble hauv dej, methanol, acetone, thiab lwm yam. Nws muaj ntau pab pawg ua haujlwm thiab muaj cov tshuaj zoo sib xws nrog dihydroxymethylbutyric acid. Muaj ob pawg hydroxymethyl txuas nrog quaternary carbon atom, thiab plaub pawg thiab cov quaternary carbon atoms tsim cov qauv covalent zoo ib yam li pob zeb diamond hauv qhov chaw, uas txiav txim siab qhov txheeb ze ruaj khov; Cov pawg hydroxyl thiab carboxyl yog cov pab pawg ua haujlwm ua haujlwm, uas ua rau cov molecule muaj cov yam ntxwv ntawm ob qho tib si cawv thiab cov kua qaub. Cov lipophilic carbon skeleton thiab hydrophilic functional pab pawg qauv ua rau nws muaj ib tug tshwj xeeb solubility thiab ua ib tug zoo heev cross-linking agent thiab organic intermediate, uas yuav siv tau dav hauv dej-soluble polyurethane, polyester, epoxy resin, cross-linking agent thiab lwm yam.
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Tshuaj Formula |
C6H12O4 |
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Exact Mass |
148 |
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Molecular Luj |
148 |
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m/z |
148 (100.0%), 149 (6.5%) |
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Elemental Analysis |
C, 48.64; H, 8.16; O, 43.19 |
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2,2-dihydroxymethylbutyric acid (DMBA) yog dawb crystalline hmoov nrog cov mis mos molecular C6H12O4, muaj ob pawg thawj hydroxyl thiab ib pawg carboxyl hauv nws cov qauv molecular, muaj cov yam ntxwv ntawm ob qho tib si cawv thiab acids. Cov cuab yeej siv ntau yam no ua rau nws yog cov khoom siv tseem ceeb hauv cov dej hauv dej-raws li cov ntaub ntawv polymer, tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus ntawm kev nruj kev cai ib puag ncig thiab cov qauv ntawm cov dej-raws li cov ntaub ntawv hloov cov khoom siv roj, nws cov nqi siv tau nce ntxiv.
DMBA yog cov khoom siv tseem ceeb hauv kev tsim cov dej hauv polyurethane, thiab nws cov txiaj ntsig tseem ceeb nyob hauv lub peev xwm ua kom tau tus kheej emulsification yam tsis tas yuav muaj cov kuab tshuaj organic. Ib txwm siv cov saw txuas ntxiv DMPA muaj qhov siab melting point (180℃-}185 degree) thiab tso siab rau cov kuab tshuaj kub kub xws li N-methylpyrrolidone (NMP) los pab rau kev sib cais, ua rau muaj kev siv zog siab thiab muaj kev pheej hmoo siab ntawm cov organic residue. DMBA muaj cov ntsiab lus melting tsawg (108℃-115 degree) thiab tuaj yeem yaj ncaj qha rau hauv polyols. Cov tshuaj tiv thaiv ua tiav thiab tsis tas yuav tsum tau desolvation, txo qis kev siv hluav taws xob ntau thiab kev nyab xeeb.
Cov methylene pawg (- CH ₂ -) nyob rau hauv nws cov qauv molecular nce qhov deb ntawm carboxyl pawg thiab isocyanates, ua rau muaj peb npaug ntawm cov tshuaj tiv thaiv (txo lub sij hawm cov tshuaj tiv thaiv ntawm prepolymer los ntawm 150-180 feeb mus rau 50-60 feeb). Cov tshuaj pleev dej polyurethane npaj nrog DMBA raws li cov saw txuas ntxiv muaj qhov loj me me (qhov nruab nrab qhov loj me<100nm) and narrower distribution (PDI<0.2). The tensile strength of the adhesive film is increased by 20% -30%, the elongation at break is increased by 15% -25%, and the gloss is increased by 10% -15%. Its comprehensive performance is better than that of DMPA based products.
Daim ntawv thov ntawm DMBA nyob rau hauv daim teb ntawm cov nplaum muaj xws li epoxy resins, unsaturated polyester resins, thiab polyurethane adhesives. Nws cov qauv dihydroxy tuaj yeem hla dhau - txuas cov tshuaj tiv thaiv nrog cov carboxyl lossis epoxy pawg hauv cov cob, tsim peb - cov qauv sib txuas, txhim kho cov dej tsis kam, tshuaj tiv thaiv, thiab thermal stability ntawm cov nplaum. Piv txwv li, nyob rau hauv fiberglass manufacturing, qhov kub tsis kam ntawm DMBA raws li cov nplaum nplaum tau nce los ntawm 120℃mus rau 180 degree, thiab lawv cov kua qaub thiab alkali corrosion kuj (pH 2-12) zoo dua li cov khoom siv.
Nyob rau hauv lub tshav pob ntawm txheej, DMBA raws li ib tug additive tuaj yeem txhim kho qib thiab adhesion ntawm txheej. Nws pab pawg carboxyl tuaj yeem chelate nrog cov hlau ions los tsim cov txheej txheem ruaj khov, tiv thaiv cov txheej txheej los ntawm txheej txheej thiab nag lossis daus thaum khaws cia. Kev sim cov ntaub ntawv qhia tau hais tias qhov sib ntxiv ntawm 0.5% DMBA rau dej-raws li epoxy coatings ncua kev ruaj ntseg ntawm 3 lub hlis mus rau 12 lub hlis, thiab cov txheej hardness (xiav hardness ntau dua los yog sib npaug rau 3H) thiab cuam tshuam tsis kam (50kg · cm) raws li cov qauv kev lag luam.
Cov khoom siv tawv tawv tawv feem ntau yog dej-raws li polyacrylic esters, uas muaj teeb meem xws li dej tsis zoo thiab ua rau yellowing. DMBA raws li waterborne polyurethane tawv txheej tus neeg saib xyuas qhia txog hydrophilic carboxyl pawg rau hauv cov qauv nyuaj los ntawm kev tsim qauv molecular, ua rau cov txheej txheem ob qho tib si saj zawg zog thiab dej -resistant. Tawv kho nrog DMBA muaj qhov qhuav rub nrawm (Ntau dua lossis sib npaug ntawm qib 4) thiab ntub dej nrawm nrawm (Ntau dua lossis sib npaug rau qib 3) uas zoo dua rau cov qauv hauv tebchaws, thiab tswj kev yoog raws qhov kub ntawm -20℃. Nws yog tsim rau high-end tawv khoom xws li cov khoom siv sab nraum zoov thiab lub rooj zaum hauv tsheb.
Organic synthesis: ntsuab tshuaj intermediates
Cov pab pawg hydroxyl thiab carboxyl ntawm DMBA tuaj yeem koom nrog ntau yam kev cuam tshuam cov organic, xws li:
Cov tshuaj tiv thaiv Esterification: Condensation nrog cawv nyob rau hauv acidic tej yam kev mob los tsim ester derivatives, uas yog siv rau synthesizing fragrances thiab yas yas;
Cyclic condensation: Nyob rau hauv qhov kev txiav txim ntawm acyl chloride, lactone cov khoom tsim tawm, uas yog siv los ua cov tshuaj intermediates rau synthesis ntawm cov tshuaj tua kab mob thiab tshuaj tiv thaiv kab mob;
Kev sib xyaw ua ke: Koom tes ua ib qho kev sib koom ua ke ntawm dej- cov khoom siv polymer soluble, xws li sodium polyacrylate thiab polyvinyl cawv derivatives.
DMBA ua raws li cov saw txuas ntxiv nyob rau hauv chav tsev kub vulcanized silicone roj hmab, uas tuaj yeem kho qhov crosslinking ceev thiab txhua yam khoom ntawm silicone roj hmab. Ntxiv 2% DMBA silicone roj hmab tau nce lub zog tensile los ntawm 0.8MPa rau 1.5MPa, lub elongation ntawm so ntawm 300% mus rau 500%, thiab lub sij hawm vulcanization tau luv luv rau ib -feem peb ntawm cov tshuaj formula. Tsis tas li ntawd, DMBA tuaj yeem siv rau hauv kev tsim cov khoom sib xyaw xws li cov khoom siv marble thiab fiberglass. Los ntawm crosslinking nrog unsaturated polyester resin, qhov cuam tshuam tsis kam thiab huab cua tsis kam ntawm cov ntaub ntawv tuaj yeem txhim kho.
Kev npaj ntawm2,2-bis (hydroxymethyl) butyric acid:
Txoj Kev 1:
Ntxiv 72g butyraldehyde thiab 60g polyformaldehyde rau hauv 500mL peb- lub qhov ncauj lub raj mis nruab nrog stirrer, reflux condenser thiab tus pas ntsuas kub, pib nplawm thiab cua sov, preheat mus rau 45 degree, ntxiv 19.7g ntawm 30% trimethyl kua nplaum aqueous, 45 min react degree.
Tom qab cov tshuaj tiv thaiv, tshem tawm cov catalyst thiab los ntawm - cov khoom los ntawm lub tshuab nqus tsev distillation ntawm 60 degree, ntxiv 113g hydrogen peroxide dropwise nyob rau hauv lub cua sov ntawm 50 degree, thiab ces ntxiv 40g sodium hydroxide rau neutralization tom qab tuav ntawm 70℃rau 1 teev, tshem tawm cov dej los ntawm lub tshuab nqus tsev distillation, ntxiv cov nqi tsim nyog, tshem tawm cov ntsev ntawm cov dej lim, thiab tshem tawm cov dej kom tsim nyog. pH ntawm niam cawv rau 4 nrog sulfuric acid, thiab tshem tawm cov ethanol kom tau 104.4g dawb siv lead ua khoom ntawm 2,2-dimethylolbutyric acid nrog purity ntawm 99.5%, yield yog 70.5%.
Txoj Kev 2:
Ib txoj hauv kev rau kev tsim khoom txuas ntxiv ntawm 2,2-dihydroxymethylbutyric acid siv lub microreactor suav nrog cov kauj ruam hauv qab no:
S1. Ntsuas ib qho nyiaj ntawm formaldehyde, butyraldehyde thiab triethylamine nrog lub ntsuas ntsuas lub twj tso kua mis thiab muab tso rau hauv lub tov khoom rau kev sib xyaw, thiab tom qab ntawd nkag mus rau micro-reactor rau cov tshuaj tiv thaiv condensation. Tus nqi ntws ntawm triethylamine, formaldehyde thiab n-butyraldehyde yog 250ml / min, 2000ml / min thiab 1100ml / min feem. Tus nqi ntws ntawm triethylamine, formaldehyde thiab n-butyraldehyde yog 0.1m / s, cov tshuaj tiv thaiv kub yog 50 degree, lub siab yog 0.2MPa, thiab lub sij hawm nyob rau hauv cov tshuaj tiv thaiv yog 70 vib nas this, lub tov khoom yog txuas nrog peb metering twj thiab ib tug micro- reactor. Cov ntaub ntawv ntawm cov khoom sib tov thiab micro-reactor tuaj yeem yog ib qho lossis ntau dua ntawm iav, stainless hlau, resin thiab silicon carbide. Lub micro-reactor tuaj yeem yog ib lossis ntau dua hauv koob. Lub micro-reactor tau teeb tsa nrog lub tshuab hluav taws xob sab hauv kom tau cov kua tshuaj tiv thaiv uas muaj 2,2-dihydroxymethylbutyraldehyde;
S2. Cov tshuaj tiv thaiv feem ntau muaj 2,2-dihydroxymethylbutyraldehyde tau los ntawm S1 yog txuas ntxiv distilled thiab concentrated los ntawm ib tug nyias zaj duab xis teb evaporator, thiab cov uas tsis muaj boiling teeb meem yog recycled thiab thov kom tau cov concentrated tov ntawm 2,2-dihydroxymethylbutyraldehyde;
S3. Tom qab ntawd tso cov hydrogen peroxide mus rau hauv micro-reactor uas muaj cov tshuaj nquag ntawm dimethylol butyraldehyde los ntawm lub twj tso kua mis ntsuas rau oxidation cov tshuaj tiv thaiv. Tus nqi ntws ntawm hydrogen peroxide rau oxidation cov tshuaj tiv thaiv yog 1200 ml / min, lub sijhawm nyob yog 360 vib nas this, thiab lub siab yog 0.2 MPa kom tau txais cov tshuaj tiv thaiv.2,2-bis (hydroxymethyl) butyric acid;
S4. Siv cov tshuaj tiv thaiv ntawm 2,2-dihydroxymethylbutyric acid uas tau txais hauv S3 thiab muab tso rau hauv lub thawv ntim dej kom muaj zog kom tau txais cov tshuaj concentrated ntawm 2,2-dihydroxymethylbutyric acid, thiab tom qab ntawd muab cov tshuaj concentrated ntawm 2,2-dihydroxymethylbutyric acid peb zaug nrog methyl isobutyl ketone, triethylamine thiab hydrogen. peroxide tuaj yeem rov qab los ntawm cov boiling qis, thiab methyl isobutyl ketone tuaj yeem rov qab los ntawm cov kuab tshuaj, ua ke nrog cov tshuaj muab rho tawm, concentrated ntawm atmospheric siab, thiab tom qab ntawd txias thiab txias, cov khoom sib cais yog centrifugally qhuav kom tau txais cov khoom tsim nyog 2,2-dihydroxymethylbutyric acid.
Txoj Kev 3:
Kev npaj cov pa roj carbon activated - txhawb nqa alkali catalyst:
Ntxiv cov activated carbon rau hauv 30% kua alkali, do rau 24 xuab moos, lim, qhuav cov activated carbon, muab tso rau hauv ib tug muffle furnace nyob rau hauv kev tiv thaiv ntawm nitrogen ntawm 600 degree, thiab qhib rau 5 teev, uas yog lub catalyst.
Kev npaj ntawm 2,2-dihydroxymethylbutyric acid:
Ntxiv 45g ntawm formaldehyde, 72g ntawm butyraldehyde thiab 3.6g ntawm catalyst rau hauv lub khob. Tom qab cov tshuaj tiv thaiv ntawm 50℃rau 10 teev, tshem tawm cov catalyst los ntawm kev pom. Tom qab lub unreacted formaldehyde thiab butyraldehyde yog evaporated, txo mus rau ib txwm kub. Ntxiv 72g dej, cua sov rau 80 degree, ntxiv 34g ntawm hydrogen peroxide, hnov mob rau 2 teev, evaporate cov khoom uas tsis muaj tshuaj, thiab txias kom tau dawb crystals, uas yog, 2,2-dimethylolbutyric acid.
Txoj Kev 4:
(1) Ntxiv 1000kg dej rau hauv lub khob ntim dej, ntxiv 12kg ntawm soda tshauv thiab 5kg ntawm sodium hydroxide, ntxiv 650kg ntawm formaldehyde tom qab sib tov, txias rau 10-15 degree, ntxiv 240kg ntawm n-butyraldehyde dropwise, thiab tuav ib qho ntxiv 16 teev tom qab qhov kub thiab txias.
(2) Muab tso rau hauv oxidation kettle, ntxiv formic acid dej thiab, kho tus nqi PH rau 6-7, txo lub siab thiab concentration nqus mus rau -0.085MPa, rov qab n-butyraldehyde nyob rau theem ob, siv dej txias rau thawj theem, thiab siv brine rau txias nyob rau theem ob.
(3) Thaum qhov kub nce mus txog 50 degree, ntxiv 500Kg ntawm hydrogen peroxide los ntawm kev poob. Tom qab poob, khaws qhov kub ntawm 60 ~ 62℃rau 4 teev thiab 70 ~ 72℃rau 4 teev;
(4) Ua kom lub tshuab nqus tsev ntawm -0.060MPa rau concentration, ntxiv 200Kg dej txhua 2 teev, ntxiv tag nrho ntawm 600Kg dej rau azeotropic tshem tawm ntawm formic acid, thiab rov qab 50% ntawm tag nrho cov nyiaj formic acid dej rau neutralization ntawm soda tshauv thiab sodium hydroxide.
(5) Ua kom pom tseeb kom txog thaum cov ntsiab lus dej qis dua 1.0%, thiab ntxiv 100Kg ntawm dichloroethane li diluent.
(6) Tom qab txias, centrifuge thiab rov qab dichloroethane los ntawm niam cawv ntawm atmospheric siab.
(7) Kev kho thawj zaug: muab cov tshuaj methanol thiab cov khoom nyoos rau hauv qhov sib piv ntawm 1.5 ∶ 1, lim kom tshem tawm cov tshuaj insoluble, mloog zoo rau cov lim, txias thiab crystallize, thiab tau txais cov khoom zoo tom qab centrifugation. Niam cawv ntawm thawj refining yog kho nrog methyl isobutyl ketone.
(8) Secondary refining: muab cov khoom ua kom zoo nkauj thiab dej hauv qhov sib piv ntawm 2: 1, thiab txias rau recrystallize. Qhov thib ob zoo tshaj plaws cov khoom ntawm Lixinde. Siv cov kua txiv hmab txiv ntoo refining thib ob.
(9) Kev ziab: tswj qhov kub ntawm chav ziab ntawm 80 degree, txias nws hauv chav ziab tom qab dhau qhov ntsuas dej noo, thiab tom qab ntawd muab nws tawm rau crushing thiab tshuaj ntsuam.
(10) Muab thawj refining niam cawv thiab methyl isobutyl ketone nyob rau hauv qhov kev faib ua feem ntawm 5: 1, txias thiab crystallize, thiab rov qab cov khoom - 2.2 - dihydroxymethyl butyric acid los ntawm centrifugation, thiab ces refine nws dua.
Cim npe nrov: 2,2-bis (hydroxymethyl) butyric acid CAS 10097-02-6, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom