Rosin resin
Panguva imwecheteyo, inewo maitiro ecarboxyl akadai se esterification, doro, kuumbwa kwemunyu, decarboxylation, uye aminolysis.
Iyo yechipiri reprocessing ye rosin yakavakirwa pahunhu hwerosin ine mbiri zvisungo uye carboxyl mapoka, uye iyo rosin inogadziridzwa kuti ibudise yakatevedzana yakagadziridzwa rosin, iyo inovandudza kukosha kwekushandisa kwerosin.
Rosin resin inoshandiswa muindasitiri yekunamira kuwedzera viscosity, shandura inonamira inonamira, yakabatana zvivakwa, nezvimwe.
Rosin resin ndeye tricyclic diterpenoid compound, inowanikwa mumonoclinic flaky crystals mune aqueous ethanol. Nzvimbo yakanyunguduka ndeye 172 ~ 175 ° C, uye kutenderera kwemaziso ndeye 102 ° (anhydrous ethanol). Haina kunyungudika mumvura, inonyungudika mu ethanol, benzene, chloroform, ether, acetone, carbon disulfide uye dilute aqueous sodium hydroxide solution.
Icho chikamu chikuru chezvakasikwa rosin resin. Maester emarosin acids (akadai semethyl esters, vinyl alcohol esters, uye glycerides) anoshandiswa mupendi nemavhanishi, asiwo musipo, mapurasitiki, uye resin.
Ndiyo polyol ester ye rosin acid. Ma polyols anowanzo shandiswa glycerol uye pentaerythritol. Iyo polyol
Iko kunyorovesa kwepentaerythritol rosin ester yakakwirira kudarika glycerol rosin ester, uye kuomeswa kwekushanda, kuoma, kudzivirira mvura uye zvimwe zvinhu zvevarnish zviri nani pane zvevarnish yakagadzirwa neglycerol rosin ester.
Kana iyo ester inoenderana yakagadzirwa kubva ku polymerized rosin kana hydrogenated rosin ikashandiswa seyakasvibira, maitiro ekudzikira anoderedzwa, uye zvimwe zvivakwa zvinovandudzwa kune imwe nhanho. Nzvimbo yekunyorovesa yepolymerized rosin ester yakakwirira kupfuura iyo yerosin ester, nepo iyo inopfava yehydrogenated rosin ester yakaderera.
Rosin esters inonatswa kubva kune rosin resins. Rosin resin inogadzirwa ne esterification ye rosin. Semuenzaniso, rosin glyceride inogadzirwa ne rosin ne esterification ye glycerol.
Chinhu chikuru che rosin resin is resin acid, iyo inosanganiswa yeisomers ine molecular formula C19H29 COOH; rosin ester inoreva chigadzirwa chakawanikwa mushure mekusimudzwa kwerosin resin, nekuti chinhu chakasiyana, saka hazvibviri kutaura kuti ndeyaani. hombe.
Rosin-modified phenolic resin ichiri kunyanya kuratidzwa nemaitiro echinyakare synthesis. Iyo imwe-nhanho maitiro ndeyekusanganisa phenol, aldehyde uye zvimwe mbishi zvinhu ne rosin uye wobva waita zvakananga.
Iyo fomu yemaitiro iri nyore, asi zvinodiwa zvekutonga senge kunotevera kupisa kwakakwira; maitiro maviri-nhanho ndeyekugadzira iyo phenolic condensate yepakati pamberi, uyezve kuita nerosin system.
Imwe neimwe chaiyo nhanho yekuita inozopedzisira yagadzira resin ine yakaderera asidhi kukosha, yakakwira kupfava poindi, uye inofananidzwa mamorekuru uye kumwe kunyungudika mumamineral oiri zvinonyungudutsa.
1. Imwe-danho rekuita Rection musimboti:
â Synthesis ye resole phenolic resin: Alkylphenol inowedzerwa kune yakanyungudutswa rosin, uye paraformaldehyde iripo muhurongwa mune granular fomu, uye yobva yaora kuita monomer formaldehyde, iyo inopinda polycondensation reaction nealkylphenol.
Kuumbwa kwemethine quinone: kupera simba kwemvura pakupisa kwakakwirira, mukugadzirisa kupisa, basa remethylol muhurongwa rinowedzera nokukurumidza, kupera kwemvura mukati memethylol molecule kunoitika, uye condensation etherification reaction pakati pe methylol molecules inoitika, ichigadzira. Akasiyana-siyana e phenolic condensates ane madhigirii akasiyana epolymerization anowanikwa.
⢠Kuwedzera rosin kune methine quinone uye maleic anhydride: Wedzera maleic anhydride pa180 ° C, shandisa iyo isina unsaturated kaviri bond ye maleic anhydride uye kaviri bond mu rosin acid kuwedzera, uye panguva imwe chete wedzera methine quinone kune rosin. Iyo asidhi zvakare inosangana neDiels-Alder yekuwedzera maitiro kugadzira maleic anhydride chromofuran makomisheni.
⣠Esterification ye polyol: Kuvepo kwemapoka akawanda e-carboxyl muhurongwa kunoparadza kuenzana kwegadziriro uye kukonzera kusagadzikana kweresin.
Naizvozvo, isu tinowedzera ma polyols uye tinoshandisa esterification reaction pakati pemapoka ehydroxyl e polyols nemapoka ecarboxyl ari muhurongwa kudzikisa kukosha kweasidhi yehurongwa. Panguva imwecheteyo, kuburikidza ne esterification ye polyols, mapolymers akakwirira akakodzera kudhinda inki yekudhinda anoumbwa.
2. Matanho maviri maitiro Rection musimboti:
â Pasi pechiito chechinhu chakakosha, formaldehyde inogadzira zvakasiyana-siyana resole phenolic oligomers ine yakawanda yakawanda inoshanda methylol mumushonga wealkylphenol. Sezvo sisitimu isina inhibitory mhedzisiro yerosin asidhi, condensates ine anopfuura 5 phenolic structural units inogona kugadzirwa.
â¡ Polyol uye rosin inosimbiswa pakupisa kwepamusoro, uye pasi pechiito chechinhu chakakosha, kukosha kweasidhi kunodiwa kunogona kusvika nekukurumidza.
⢠Mu rosin polyol ester yakabatwa, zvishoma nezvishoma wedzera synthesized resole phenolic resin inodonha, dzora kudonha kwekuwedzera mwero uye tembiricha, uye pedzisa kudonha kwekuwedzera. Kupera kwemvura pane tembiricha yakakwira, uye pakupedzisira resin inodiwa inoumbwa.
Kubatsira kweimwe-nhanho nzira ndeyokuti tsvina inobviswa nenzira yemhepo, iyo iri nyore kubata nayo mukuchengetedzwa kwezvakatipoteredza. Nekudaro, iyo phenolic condensation reaction inoitika muyakanyungudutswa rosin inowanzoitika kune akawanda emativi maitiro nekuda kwekukwira kwekushisa kwekuita uye kusaenzana kunyungudika.
Kugadzirisa kwakaoma kudzora, uye hazvisi nyore kuwana yakagadzikana resin zvigadzirwa. Kubatsira kwemaitiro maviri-matanho ndeyekuti phenolic condensation oligomer ine chimiro chakagadzikana uye kuumbwa kunogona kuwanikwa, yega yega nhanho yekuita iri nyore kutarisa, uye mhando yechigadzirwa haina kugadzikana.
Izvo zvisingabatsiri ndezvekuti iyo yechinyakare phenolic pulp condensate inofanirwa kuderedzwa neasidhi uye yosukurudzwa nemvura yakawanda kuti ibvise munyu isati yaita nerosin, zvichikonzera kuwanda kwemvura ine tsvina ine phenol, izvo zvinokonzera kukanganisa kukuru nharaunda uye inopedza nguva yakawanda.
Mubvunzo wezvakanaka nezvakaipa zveimwe-nhanho uye maviri-nhanho maitiro ave kwenguva refu ari kutarisa kwevagadziri veinki. Asi munguva pfupi yapfuura, nekubudirira kwekubudirira kwekusina-kushambidza nzira yekugadzira phenolic condensate, kurongeka kwemaitiro maviri-matanho ekugadzirisa akakurudzirwa zvakasimba.
