Document Qk1QELGY2pnwr3MQk592M9Djo

E. 1. DU PONT DE NEMOURS & COMPANY KREBS PIGMENTS DEPARTMENT 256 YANDERPOOl STREET NEWARK. NEW JERSEY Copy No. 1 NEWARK PLANT PIGMENT COLOR RESEARCH REPORT REACTIVITY OF 5N0g2NHg ANISOLE -> NAS-D (RT-588-D) THS EFFECT OF SOLVENT TREATMENT Period Covered: April 22, 1349 - March 15, 1950 FILE: DATE: 8/14/50 N,J*7S Serial S* o. 101*50-13 Copy So. i mmm mm PIG-MEST GQIiOH HtSMRGH 889088 Filial Beporfc 1*1*1 OF IBB SFFiCf OF Period Covered* April 89* 1949 - March 15, m Chargot 1101*11*4 ^AFPBO^BO fflt t 23 * $. 8898189 MM 8tS8ISSK!>t &/4/S0 y//s2> i 8/14/50 DUP050068060 fHTSOOTgfXQjf On* of the imfcrtunabs tpMSNMrliie# of i9f*6ee*35 if Iff . la a good aka? elkyd vehicles. #i^n ... by the Gsnsral Organic Group innedify* .WC'WRWP XU PPwP gs#n WfAflfcivfftJiklK remat&fcndi ( Jar in a :itw#ai#i cook mikyvUoX* SI ofthlswwka modified pa * achieved it# imppevsnsnt la p# additives* :- y^y, repoot point# to another ^protch in achieving a ^ifitlii iVfirif trsi njsiiesM^ibdvte qHjg| AtMMWiihiif^lK ^ ft fiilUft/t satt ll iWlfifut'lfi Itebeiedt -tin' o^^F^giia ^ m^nP. -If^ai^fwke*g ^fjpi9 vrl^Kp^^^rgyvl .^;. degree of reactivity, la addition to being a function of the surface^ area of a crystallite, Is else a significant function of the physical SwISttf A $*3 $**1MS# W JiP 9W wwSrftCw'IIP vWwlS* wmm SjPilpSwIlr Mfiee and the ccnstitasats ef the vehicle, which | respeasibirfer the reactivity of the paint system, can be considerably altered by>; simply changing the saber# of the crystal surface* that coast!tniss this change 1# sot clearly understood* but it probably has be do with bho degree of strain and crystal imperfection enistingat th# surface and perhaps bo a Isseer degree relatee to the crystal habit* the nature of the crystal surface can be changed threofp* solvent action and this report deals with ths offset that too solvents, chloroform and acetic add- have on the reactivity of HfSS8** ' 1 previous menoraadtas report, B&f"dt4S also deals with the effect of solvent treatment on h S*68S*D# The concept of solvent action directly on the pigment to .produce sene desirable change in the nature of a pigment surface la one capable of opening up a large field for practical research* i) Solvent treatment {CEGls or idle) of 8ZHMM># followed by a . grinding step, if capable of producing a product of particle siae smaller than that of the crl^nal pigment but of less reactivity* m . fhfa solvent treatment does not cause a phase change although ' ^^selvsisS treatment a phase change can bo produced* m ill solvent _ Of BT*688*B and ts have been soesewhet on the dull side *B* 4) The solvent treated products of largo particle olio have been , superior in reactivity to either D$*dll*& or MMMtHPt* whereas solvent treated products that have been ground to a snail pertide wise have shown less reactivity than but acre reactivity 6) ISwen though the larae uartide- s ed products are very low In rs&ativity, their opacity makes t: ' unsuitable for use in metallieB* DUP050068061 8| Hi# ooacepfe of a treatment to affect roaotivity is ; it v#n*' worthwhile tbarw is opportraity fop aonaidsnSbly ' * tsronlc In Achieving proper control of tho solvent m tfcs ffmirtti) of IHM* wtaadayd wwa aaposod to ehlerofora or Oieotio acid In various ways* Alton ttxpoiraro* th alurrieo filtwrwd hut. the solvent was titooratid ot modwratw tdapwra" tly offset of this solvent osposoro m tho specific surfao# measurement* by nitrogen adsorption* SFPSOf OF SOLVED MM! OF H0?*588-l> ____________ gJBMWMLmmm;: Dttsaritttlaa 1 HT-58S-D *a Is* n Httflused 8 hrs* In chloroform 5 * 8 hra. la * 4 Soafc 8 days In chloroform i #8*o * i Bftfiux 86 hrs. la Chloroform & naii<it 3-1/2 days la chloroform H#Su g*2%#d*a1y1s1 la aoet*ieoidso*ldBoll* It can ho aeon to Table of 8 hrs* to h olio to o point where the specific surface drops from ffWfwi%g* &I&tyimniia: yg&akMlsdoh**h*.oa sAortiA* iitAhat' h...a... l*l*alllin-g-- th....i.s..- ` S ;* Also surface. Hat *t:t af tho of Table I or for reactivity because it rapidly hooaao of this typo with a specific aurfaoo as loo h ` llhiia *Ftn& flf thft aauialaa aat Lth 104 Bf-617-8. hid ocnaida vehicle o*<p R5-6H-D at may ha 33*8 8*8 l*f 8*8 6*8 6.7 6.8 "S DUP050068062 TABLE II Ago of Enmml (Btya) mjmm STIOXOi *tT11T# mfm to Ti&io i. gttiSJL **>A ^nw^d tothol* 00*00*00 00 N0i m ': ^PiAP"P 0 <fff|f Vitl)#ttt adfldLStttOO ^ .-^ --i w^O^Gi0vJPi*%DJ%jja'm -MWHP jWp4lOw*dT3 VIA ^ ^ A^A -j a--M Ah^i A',^ twOH^ * * wSHSix? w.m ,,,, ,,, it ii lofozdo? to RTHilioD- gat* |g inHoni ill ^w^Ply .,|(VWOWw JW^O "Of appH(Pk ^OPOOO* AAVO tSnMWyjtpOS ASOS TABLE III Ago of Enwml (0y) o .*M>. Btx1# tinatorlallj, w*l^li*J* ** ** fho gtofo data w mo ; t-o p,,.o..i..n_t....d._iro...c...t.l..y. t.o.. t_b__s _____ tb*t to ------- - ---------- -- ,, mmi**y to deorvav* tho psrtlolo also tat, io oo doing* tho pignant uff0i* to tinotoylaXly that this o0f rodutelmng| y(aoaaelhtalvniitoy teoMnmhnfoHwIOBfioiUjta*aaomthicVahli.mw&f-l $0 CfeftlitI^4RMM^jfcl - aoXtant*. m irtativtrrti) oaaetivU pla it ___..... ..,,, ,,..... ..... .of) was ballalUad fop __ lisillV__aftn4<4ilmiii. Soif3iBifftifal ddttifl** <B T-6<B.S>-.D riteun7 BiiiwiBiaBi vravo ootainwa* iv aoova toow o d a oafcM.4 jjithp mq # Sho p mo p s imMiMOimM>dtoo'it io ^^bup"^fcpiyap^pvmpA^Mt k^mPaMjP^*y ^-=y^-APt^a'^yayIKplHj^piw^vfsl*&otaplfywfsp ~<i- aA-^^^^pyouppaaai to.1 TABLE CT Ago of Sf*ill*# SS^^gXBN 0# of Ground (By*) BoaotiTity is toiii **tp* VaMoiO Popd Otto RaadlvaaifSaa.) Ir^flli^O ..0- la 00 00 lot H Itt W t*2a*> 0 W ^6 m m (Tllix) i95 SPOfOP- tO **wi*il-* 0*.-#iitlOW"P '"lyo ww '*y*"^^gr*PW yp^i^^ywftf p* ww .P'yW^-PWIr IO0 wsawr# Hd DUP050068063 it cm fee teen twm fable XV tfeat fealXailllag in tlie iatti reducedthe partlola aiae fee lass tfeat of the origi Theorfginal pigamnfc feed a specific surface of 88*8 aq* g*g tfea ground samples had specific surfaces greater than @9 sq* *09 3JBjpQF*33tv ODfVrTSaAwl xBmK*r Ij Pw w *>P*i Xva ZlwV9TWr| 4:S avast mi tfea high specific surface of 82*1 sq* wg* tfea solvent treated material febe laaa re&otlvitv than tfea iu d Io of apaolflo aurfaoa 88*8 aq* fe/g* Tfea only difference between the two s&**^pi&3 2. ip.- mw 9 w j MI .fsXV1#!* 91 P3r8a*ilqW"wHls tajcHyftuffl'Otivig X*!33 J9W*^WMaV'w9wa treatment -dte mat add or subtract -aaytfefy^ foam tfea plgawnt* The ppa* advent treated aaarale of apaolflo surface 88*1 sq* M/g la also taper la reactivity than "as la** af*088*i> af apaaUla aurfaoa 88*8 sq* w&* Sfeio completely disproves amy thoughts tfeit *no may have that tfea moat important ffgfa consideration atom e^elfrg rlt** ^lyaa of reactivity of a single pigment la' tfea specific aurfaoa* ' Qua moat also give considerable consideration to tfea physical atata of that aurfaoa* mi fable XV It asm alto be seam that goad as tfea solvent treatment and grinding may fee* it doas mot yield a pigment as good ae 82*611*8, but H must be remembered that ttso aolventtreated and ground product oontains no additlvea as data RT*6U*D* Even though tfea ground products give acceptable flaah lm mctalllca, both metallies and neaatona era' still an the dsil sida tinctorially ufeea coshered to ffiMOM or Bt*668*8 It la mot olearly understood why this should fee so for a pigment of apeoific aurfaoa above 80 aq* W& farfeapa a epeoifio surface around that of tfea original pigment will yield tfea optimum intensity, Partial also distribution may also play an Important role in establishing tfea In* tensity of tfea meaatone* it le felt that tfea control of particle also and partiola also distribution of tfela plgaant la a major umdariafeing in itself and no work otfeer cfeao ufeat fees boon reuertoli here t** been attempted* xt efeould fee rea&led (Table %) tfeat tfea early and only attempt at suefe control through solvent exposure brought la light tfea fast tfeat tfea partiola slat lucreaaad very rapidly with even mild expoeure to advent, making any praeiaa control vary dlffloult* Ooneiderably mara work will feava to bo done to obtain proper control through solvent action and tfea concept of tfea control of particle surface through solvent action opens up a largo Hold of research* . Am notebook references adtfe fe** sopk described in this report may be found in S*B* Ss y* .198*' DUP050068064