litaba

Hona joale batho ba na le likhetho tse ngata tsa tlhokomelo ea letlalo, metsoako e sireletsang letsatsing e feta mefuta e fetang 10, empa lihlahisoa tse ling tsa tlhokomelo ea letlalo li bonahala eka tlhokomelo ea letlalo e hlile e tla senya letlalo la rona. Joale re khetha lihlahisoa tse nepahetseng tsa tlhokomelo ea letlalo bakeng sa letlalo la rona joang? Ha re bue ka benzophenone-4, motsoako oa bohlokoa lihlahisoa tsa tlhokomelo ea letlalo.

Benzophenone-4 ke eng?

Benzophenone-4ke motsoako oa benzophenone, o bitsoang BP-4, formula ea lik'hemik'hale C14H12O6S. Ke phofo e tšoeu kapa e bobebe e mosehla mocheso oa kamore 'me e khona ho monya khanya ea UV ea 285 ho isa ho 325 Im. BP-4 e na le melemo ea sekhahla se phahameng sa ho monya, se se nang chefo, phello e seng ea teratogenic, khanya e ntle le botsitso ba mocheso, joalo-joalo, UV-Absorption BP-4 e khona ho monya UV-A le UV-B. ka nako e ts'oanang, ke sehlopha sa I se sireletsang letsatsi se amohelehang ke United States FDA, United States le linaha tsa Europe li na le maqhubu a phahameng a sebelisoang, haholo-holo a sebelisoang ka tranelate e sireletsang letsatsi le litlolo tse ling tse sireletsang letsatsi.

BP-4 e monyang moeaha e chefo, ha e chese, ha e phatlohe, e bonolo ho monya mongobo moeeng, ke ts'ebetso e babatsehang ea acidic aqueous UV e monyang, e ka monyang khanya ea UV ka matla. E sebelisoa haholo e le mokelikeli oa ultraviolet bakeng sa liphahlo tsa polymer tse entsoeng ka metsi le pente e pherese ho thibela oxidation ea photocatalytic ea liphahlo tsa polymer tse entsoeng ka metsi le pente e pherese; Ke setlolo se sireletsang letsatsi se setle bakeng sa litlolo le sehlaseli sa UV ho ntlafatsa ho hanyetsa boemo ba leholimo ba masela a boea.

Benzophenone e sebelisoa haholo linthong tsa ntlo tse kang likhalase tsa letsatsi, liphutheloana tsa lijo, liaparo le lihlahisoa tsa ho hloekisa ho itšireletsa khahlanong le ho pepeseha ha UV. E ka silafatsa metsi a nooang 'me ea tloha ka har'a sephutheloana sa lijo ho ea lijong. Benzophenone e sebelisoa lienkeng tse ling tsa ho paka lijo 'me e ka fallela lijong. Benzophenone e hlaha ka tlhaho dijong tse itseng (jwalo ka morara wa veine le morara wa Muscat) mme e ekeletswa ho tse ding e le setlolo sa tatso.

Lihlahisoa tsa tlhokomelo ea motho ka mong, benzophenone e sebelisoa e le ntho e matlafatsang monko kapa ho thibela lihlahisoa tse kang lisepa hore li se ke tsa lahleheloa ke monko le 'mala tlas'a khanya ea ultraviolet. Li-derivatives tsa Benzophenone tse kang BP2 le oxybenzone (BP3) lebenzophenone-4 (BP-4)li sebelisoa ho sireletsa letlalo letsatsing. Oxybenzone e sebelisoa e le sehlaseli sa ultraviolet le stabilizer, haholo-holo ka lipolasetiki le litlolo tse sireletsang letsatsi. Benzophenone le oxybenzone le tsona li sebelisoa ho bentša lipekere le setlolo sa molomo.

Benzophenone-4 e sebelisetsoa eng ho hlokomela letlalo?

Uv absorbent BP-4 e na le melemo ea khanya e ntle le botsitso ba mocheso, 'me e sebelisoa haholo ka tranelate e sireletsang letsatsi, tranelate, mahe a linotsi, lotion, oli le litlolo tse ling tse sireletsang letsatsi. Haholo-holo e loketse setlolo se sireletsang letsatsi, lotion, pente, tekanyo e tloaelehileng ke 0.1-0.5%. Tekanyetso e tloaelehileng ke 0.2-1.5%.

Uv absorberBP-4e qhibiliha habonolo ka metsing, 'me tharollo ea metsi e na le asiti, kahoo e hloka ho fokotsoa nakong ea tšebeliso. Tharollo PH e kholo ho feta 9 e tla etsa hore maqhubu a ho monya a fokotsehe, ts'ebeliso e kholo ea letsatsi le letsatsi le lihlahisoa tse ling tsa tlhokomelo ea letlalo ho thibela botsofali ba letlalo bo bakoang ke khanya ea ultraviolet.

Benzophenone-4 e sebelisetsoa eng ho hlokomela letlalo?