DDI, CAS: 68239-06-5 Dimeryl Diisocyanate, Dimeryl-di-isocyanate
Ko te DDI he diisocyanate aliphatic ahurei ka taea te whakakotahi ki nga pūhui hauwai-kei roto ki te whakarite polymers.He pūhui mekameka roa me te tuara o te waikawa ngako dimerized 36-waro.Ko te hanganga mekameka matua he pai ake te ngawari o te DDI, te aukati wai me te paitini iti atu i era atu isocyanates aliphatic.Ko te DDI he wai iti-potaka, he ngawari te whakarewa i te nuinga o nga whakarewa polar, kore-polar ranei.Nā te mea he isocyanate aliphatic, he āhuatanga kore-kowhai.
He aha te whakamahinga me te painga o te DDI?
Ka taea te whakamahi i te DDI ki te whakarite polymers me te rua, neke atu ranei o nga pūhui hauwai kaha, ka taea te whakamahi ki te whakarite i te polyurethane (urea) elastomers me nga mea motuhake, nga rongoa rongoa mo nga kaitarai toka toka, whakapiri, hiri, whakaoti papanga papanga, pepa, Hiako me te papanga. kaihoko parewai, rauemi hiko, rakau tiaki parewai kaihoko, etc.
1. Kei a DDI nga tono mo te maimoatanga o te aukati wai papanga me te whakangawari o te mahi.He mea ngawari ki te hanga i te whakaehunga wai pumau me te wai, ka taea te whakawhiwhi i nga papanga me te ngawari-roa;hei parenga wai papanga, he pai te aahua o te wai, ka taea hoki te whakapai ake i te painga o te wai papanga me te hinu hinu.
2. Ko nga kapia polyurethane me nga kapia polyurea i hangaia mai i te DDI he kore-kowhai, he pai te elasticity me te ductility, te kaha teitei, te iti o te wai, me te pai o te abrasion, te aukati matū me te iti o te pāmahana.
3.He tino pai te hototahitanga me te tauhohenga o te DDI ki te polybutadiene kua whakamutua te hydroxyl, a ko te polymer kua oti te whakarite me te kore plasticizer he iti rawa te pakeke.
4. Ko nga paninga polyurea-a-DDI e piri pai ana ki te whakarewa me te rakau, kaore he kapiti, me te whakaatu i nga ahuatanga tino pai, nga ahuatanga piri me te aukati huarere.
Hua e pa ana
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