Chinosimbisa chakavakirwa mumvura hachinyungudike mumvura, asi chine hunhu hwekusimba (hachina ionic kana molecular chain hurefu hunosvika 2 ~ 3 levels, nzvimbo yakakura chaiyo yepamusoro) yezvekuwedzera zve organic. Ikirasi yechinosimbisa chakavakirwa mumvura , chinonyanya kushandiswa mu coatings, mapurasitiki, rabha, pendi nezvimwe organic coatings, adhesives nedzimwe maindasitiri. Stiffener ikirasi yema organic compounds ane hydrogenated kuti agadzire emulsion yema ester groups (ona Appendix A), chinosimbisa chakagadzirwa zvakanyanya ne stearic acid (ester), hydroxyl (kunyanya ester group), hydrogen bonding, hydroxyl, carboxyl, uye amide groups. Hydrogen bonding pakati pema ester groups inopa chinosimbisa mvura kuti chitore mvura kana kuzvimba. Nokudaro, chinosimbisa chinogona kukunda pendi, adhesive nekuda kwekuwedzera kupisa kwakanyanya kwe adhesive layer yakakwenya, yakatsemuka kana kukwenya nezvimwe zvikanganiso. Chine resistance yakanaka yekukwegura, acid ne alkali resistance, uye hunhu hwakanaka hwemakanika, resistance yemamiriro ekunze, resistance yekupisa uye resistance yechando.
- tsananguro
Zvinoenderana nechimiro chayo, stiffener inogona kukamurwa muzvikamu zviviri: mafuta-inonyungudika uye inonyungudika mumvura. Oil-soluble stiffener inonyanya kushandiswa mukuputira, mapurasitiki uye rabha uye mamwe organic coatings kudzivirira zvinhu kubva blistering, kuputika, peeling uye kumwe kukanganisa nekuda kwekuwedzera tembiricha. Mvura-soluble stiffener ine mhepo inonyorovesa pamafuta nemvura, izvo zvisingazoiti kuti pendi iparadze, asi musanganiswa wepigment haugone kunyatsogadziriswa kana kuita kuti ive turbid uye zvimwe zvikanganiso. Nekuda kwekuomesera haabudisi ne-zvigadzirwa (zvakadai se acrylic asidhi mhando kana sulfonate ester mhando) kana haibudisi ne-zvigadzirwa, nokudaro kuvandudza dispersibility yehardener uye kuwedzera kuoma kwekugona kuvandudza zvakanyanya kupisa kwayo kupisa, mamiriro ekunze, kutonhora kupikisa uye kuderera-kupisa kwekuita. Panguva imwecheteyo inogona kuderedza nhamba yezvinonyungudutsa mumucheka uye kuwedzera mvura-based stiffener munguva yekuomeswa kwekugadzirisa nguva inodiwa kuderedza mari yekugadzira.
- II. Iyo yakakosha chimiro chemakemikari
MaStiffener anowanzo kuumbwa neacetate esters, fatty acid esters, hydroxy acid esters kana alkyl lipids. Yakawanda yekuomesera ine kunyura kwemvura, saka iyo organic solvents inogona kunyatsoparadzirwa mu emulsion uye kuderedza viscosity yeiyo stiffener system, inogona zvakare kushandiswa seyakagadzikana kana emulsifier. Stiffener zvakare ine yakakosha zvimiro zverudzi, senge: solvent-based stiffener inoshandiswa mumapurasitiki, rabha, machira, anonamira uye mamwe maindasitiri. Solvent-based stiffeners inoshandiswa mupendi uye machira ane yakanaka kuomesa maitiro. Liquid inoshandiswa muindasitiri yechikafu kuchengetedza kuita zvakanaka. Haina kunyungudika mumvura, inonyungudika mune organic zvinonyungudutsa senge acrylates, inogona kuenderana neakawanda organic solvents. Inogona kuburitsa hydrogen bonding neasidhi uye alkali, ine yakasimba chelating simba reanhydride uye mamwe ionic simba, uye inogona kuve polymerized nemhando dzakasiyana dzemapolymer. Iine kumira zvakanaka kwemamiriro ekunze, kuomarara kwepamusoro uye kusagadzikana nekuora.
III. Kushandisa stiffener
Kusanganisa: kuomesa musanganiswa kuchaonekwa kwakawanda kuunganidzwa, mukusanganisa uye kukonzeresa maitiro kuburitsa chiitiko chemabhuru, uye yakawandisa kumiswa. Ichatungamira pakuumbwa kwemulsion firimu pamusoro pepende uye kukonzeresa kuomarara kwemaitiro uye mamwe matambudziko. Naizvozvo, kutarisisa kunofanirwa kubhadharwa kune kuyerwa kwehardener, huwandu hunofanirwa kuve hwakakodzera, uye musanganiswa haufanirwe kunge wakanyanya kukora, kuitira kuti urege kupararira zvisina kuenzana zvichikonzera kuputika, kukanganisa kushandiswa kwemhedzisiro.
Low-speed mixing: low-speed mixing equipment inoshandiswa hydrate the stiffener and form the water mix of uniform consistency. Iyo nzira ine marudzi anotevera: kutanga wedzera yakaderera kusanganiswa kweiyo stearic acid (ester), hydroxyl, hydrogen bonding uye hydroxyl, uyezve yakasanganiswa ne stearic acid kana ester boka kuti iite stiffener; kana maviri ane stiffener musanganiswa mushure mekuwedzera huwandu hwakakodzera hwemvura kuti iite denatured nekudziisa.
Rudzi rwezvinonyungudutsa: rudzi urwu rwechinosimbisa rwakavakirwa pa carboxyl (kana hydroxyl) sekirasi yemakomputa eorganic kana mapolymer, anonyungudutswa mumvura uye anoumba chimiro che copolymer (chinowanzova che ester). Kana kuti polymerization yayo kuti iwane cheni refu yemamorekuru, nzvimbo yakakura, viscosity yakakwira uye ine hunhu hwakanaka hwekupararira uye imwe nhanho yekunamatira mu waterborne coating system (zvikuru zvinoenderana nehuwandu hwe resin system mu stiffener) ye polymer ye crosslinked structure yechigadzirwa. Stiffener imvura ye emulsion, inonyudzwa patembiricha yemukamuri uye inosangana nematanho akasiyana-siyana ekuita kuti igadzire network structure. Stiffeners inowanzova nemunyu mudiki, carboxylic acids (semuenzaniso, hydroxylamine, phosphate esters, kana disodium sulfonate), kana huwandu hudiki hwesimbi ions sekuwedzera. Rudzi rwayo rwekushandiswa rwakakura kwazvo, kusanganisira water-based coatings , plastic films, adhesives uye polymers dzine stiffener zvinogonawo kushandiswa se base material ye coatings kana plastic products.
- Mvura-yakavakirwa kana mafuta-yakavakirwa: inoshanda kune ese marudzi ekupfeka, kazhinji epakati-renji zvigadzirwa;
- isina-mvura yakanyungudika: inogona kunyungudutswa mumvura uye zvishoma nezvishoma yakapararira mu emulsion yakafanana yakaparadzirwa;
- Solid-phase kusanganisa: emulsion fluid inogona kuwedzerwa kune yakasimba zvinhu zvine akasiyana organic adhesives uye yakasimudzwa zvakanaka (ine organic fillers) yekusanganisa; kuwedzera chiyero chakakodzera chekuomesera kuchaita kuti iyo yakaomeswa nehumwe kuomarara kuti ivandudze iyo mechanical properties uye kuchembera kuramba;
- Mvura-based stiffening coating.
- IV. Kushandiswa kwekuomesa mumiriri mune organic coatings, mapurasitiki, rabha uye mamwe maindasitiri
Kushandiswa kwezvisimbiso muzvipfeko zvemvura kunonyanya kuitirwa kugadzirisa mapolyester asina kuguta, ma emulsion e copolymer, nezvimwewo, izvo zvinogona kuvandudza mashandiro ema synthetic resins. Polymer yakaoma haina kusimba kwemhando yepamusoro chete, asiwo ine simba rekudzivirira mvura uye kuramba kukwegura. Kana ichishandiswa, chinhu chinosimbisa chinogona kusanganiswa nemushonga une huwandu hwe20-40%, uye chobva chawedzerwa mu reaction kettle kuti chiite emulsification reaction, uye emulsion yakasimba inogona kuwanikwa mushure mekuwedzera huwandu hwakakodzera hwekunyungudutsa. Kana emulsion iine zvinopfuura chikamu chakati che organic solvents, polymerization uye kuora zvichaitika, izvo hazvingoderedzi mashandiro e resin chete asiwo zvinokonzera kukwegura kwemidziyo kana zvigadzirwa. Nokudaro, kuwedzera huwandu hwakakodzera hwechinhu chinosimbisa mukugadzirwa kwe coating uye polymer system kunogona kuvandudza mashandiro ayo uye kuita kuti chigadzirwa chive nekuchinjika kuri nani uye kuramba kupisa kwakanyanya.
- V. Yambiro
- Iyo inoomesa mumiriri inozoora kuita zvinhu zvepolar pasi pekushisa kwepamusoro uye hunyoro hwepamusoro, saka inofanirwa kuvharwa uye kuchengetwa kudzivirira kubuda uye kusvibiswa kwechigadzirwa.
- Kuchengetera kunofanirwa kuve nemhepo uye kuoma, chengetedza imba yakaoma.
- Dzivisa kuratidzwa nezuva.
- Wedzera uye shandisa zvishoma nezvishoma paunenge uchinyorera.
- Usasanganise kana kunyorovesa chigadzirwa nemvura, kana kusanganisa nemamwe anorapa, mafirita, pigment, mafirita kana pigment kana yashandiswa.
- Izvo zvinorambidzwa zvachose kusanganisa nemutobvu, mercury uye zvimwe zvinorema metal additives.
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