Document 1Q6Bbx9vOqEGyQgR270mOnLxX
A. B. HOLTON ESQ. 5HEBWIN 7/ILUAMS CO. (CLEVELAND)
SDFPUraUfiST TKOHNICjlX OPERATIONS - BKfOTW -
SBPC. * OCT. 1946. PreBanted gebruary. IS4r?
Series S.53
so?-
*S. 1/2 2/3 3/4 5/6 6/7/8 8/9/10 10/11 11/12/li 13/1V15
Series Wo.53
Tacaaoii, o h s .a t io h s r ev o r t - s k pt /o c t . 194s.
Is'iUEX
Item Uo.
P.43 P.54 P.56 P.82 P.86
P.86
P.116 P.117 P.119
Title
laatroil & Maisone Tinting Colours Flotation of Pignents Pompeian Super Synthetic Enamel Stoving Finishes for
Prefabricated Houses. Finishes for Prefabricated
Houses. Finishes for Subber Keuplastite Kerarist Chlorinated Rubber
Paint.
Acknowledgment is duo to the following, under -/hose supervision the above-mentioned lav* -stigations have 'been made;- .
ir. W. H. Stitson Mr. R. 0. Scsaerville I.r. J. K. barraclough ;r. 0. K. Francis
Varnish said Pevelopnaaiit Paint Control Section. Dry Colour Section. Cellulose Section.
Section
(sea) H. HK.VKEhU
ihKAff- -Technical Operations.
5 UP
u`
(1)
Series 'to. 53
MAgROHi & te JSOKE by
j. g. t o :'is
(P.4-3- J
ingot poraticn of Cellofaa and Bentonite in Maisone formlatioo to replace' iriie of the glue in present Formulation.
?xperimeoatal wirings were made cutting the glue content of present formulae fham to 1/ ;<nd incorporating Casein. Bentonite cr Celiefas tn obtain the necessary condition, without inquiring brushing or applcaionjrc>erties.
' he use of Bentonite necessitates the use of more concentrated Glue-Case in solutions. namely, 2C# and 15/ respectively? in order to obtain enough water in which to soak the Bentonite and giro the oenditicm required during manufacture, This makes the material
very difficult to fill and mpos3i~ ;le to manufacture in K. -'.*pi,,
where a th:n material is required 'inch will fill aaBily and set to
a satisfactory condition after filling.
Brushing properties of t'lis type of material appeared quite satisfactor y when applied on bare plaster. The us of an increased amount of j entonite imparted poor rrushability.
Sinai fern*Taticn3 used were as follows:-*
a) Benton: te Type.
A .50,75 .13-5
U35 Iba. :m,625
5kZ "
JM.8
50 (Solid l/)
13.5 (Solid 2) 9.0
112 " 302 M 200
:55/271/1 (20# Glue Soln.) 153/27V3 {15# Casein) ivsm
2.6 (Solid 0.25:;) 79 "
:55/27Vi (1C(;>
Bent :nite
ao
AJ
Solid 0,01/} '4 " 90
Oellofra Type.
&o93 6119
50.75 15* 5
1155 Vua, JC &2'5
51-2 "
:.M. 3
5,0 (Solid 1<` 13,5 (Solid Si)
5.19
112 :: 302 '
132 !i
:53/27V'i (t.';5 Clap; 5}/Z?h./7, (135 Cases i;) ' 13TSR
5-.6 Solid 0,. ,.5/s' 127 "
iSi/^+A
1,0 Solid 0,:0l= > k-M 90 "
:&c99 111?
UP
Rf
(2) Scries No,53
MATROIL& MAIUONS (Continued)
(P.4-5.)
Neither formula was adopted since Casein and Cellofas became unavai lable.
TINTING COLOURS by
0, STEVE !S
Series No.53
Hejort on one month's exposure of Chrome Yellows, Hanaa Yellow, Cadmium Lithopcne tinted wiOh tfcnaatral Blue and Chin>sae Blue altemai ively. Also exposed were Chromium Oxide, L'onastrjil Green and Cobalt ^Teen. The Base used was 11X6888 Pompeian Sup<2r Synthetic Shite which had an addition of 10> Line Oxide.
Thi 3 series of tests was ns.de to check the action of Sine Oxide on the rapid fading of chromes etc., when used as tintera.
Dai a exposed 7,10.46.
After 1 month's exposure colour and gloss were compared with a masked sec-i ion of the panels.
EXPOSURE NO,
CHROME
BUTE
COLOUR
gl oss
993/1 993/2 993/3 993/4-
99kA
994/2 994/3
994-/4-
995/1
995/2 995/3 995/4996/1
996/2 996/3
996/4996/5
13608
t* 31686
W
C26I?64> K8671(101}
<! 02973
n
03105
ai.3.37
Ho 5incU Oxide.
Hml35 No fine Oxide.
I.Y7890 116462
BY5163 318352 775163 7X8352
Br526? B33352 BY5163
BY8352 BY5163 BY8352 BX5163 BY8352 1515163
BY8352
faction dirty and grey 1*
) taction dirty and blue ; raction dirty, slightly
raiu <a .` lightly dirty traction dirty fnrome almost gone.
gra-7 and dirty. K . It ?
jfirty
fkjod W
tt
r< n r
~t ii'ty ana blue art;/ and bravn J -luiali grey
it
faction dirty
n
it ti
trey lightly dirty
.::,ocr 'k>od
7 SUP
0 F,
Q
(3)
'INC COLO Conn'tinuea}
Series Nc.53 {I-15V,}
SXF0SU11E NO,.
CHHOLIB
997/1 997/2 997/3 997A 997/5
.820137 & Zinc Oxide.
Hi3.57 <fc Line Oxide.
pj,a33 &
line Oxide
:3H8SO &
Zinc Oxide BT6482 & line Oxide
BLUE
COLOUR .
GLOSS
115163 318352
Fraction dirty & brown t n
Enaction dirty
Fairly good Fairly good Fairly good
Grey Slightly dirty
Fair Fairly good
- moat interfacing points already observable are that Oadnuiaa Lit!;ooone primrose ^obalt Veen ore very poor when used in pale tints. Line chrane in this aeries sheers no advantage ov ar Lead Chrome, and lemon Chrome is superior to ilrimrose Chrome. In those oases when duplicate tests have been eonSueted with and vdtheit Line Oxide, only alight differences exist.
FLCTATIQfT OP r-lS.J-Pl'S by
J. F, VEILS
iSeries Kc.53(2?,,56).
Testa were osrried out mainly in respeot to Danish racon
Srey, but also for general information, with regard to flotation, trouble being experienced,
V/fcite, Black and Bias bases were ground in Oil ledir {95529} and Synthetic ledia (SA52S1), using the following -pigr-enta.
Whites:-
HIL713 Rl. blO 12,16.18
R..;, b E..6
1 Itanium White labile Titanium 1,10 / itirriony Oxide Z l ibop-one
Inc Oxide
Blues:.3 tasks:--
PIi. 112 BY726fi
2275155 318352
V -.tra Blue C >balt Blue ' i jncctrsl filer Prussian Blue (02537 `
,,1>5 11.181
?i~57 '215o
1 -getable 2slack C. root. Black .0.'oo ' `.''..n-: ; .
op Bisack & ticojv-' ZuJ/lO.ds;-
.
S/./P
052S90
mgtgssisg.j b gass {Continued)
(1.56.)
She White bases were -tinted with Blacks sad Bless
separately, and made into finish 2& enamels of Pompeian rad fenitone Quality. fees* materials were then brushed over bare sveel and
rndercoating left "ropey" in orcar to accentuate the flctation, with tne following results;-
BMociQ HM.713
Bfi.618 3Mo 8 BM*6
Shows very be I flotation with all Blank and Blue pigments.
Shows very had flctation with Ultra Blue and all Black pi,c :ients Cobalt, Monastrcl and Broasian Blue behave better with this pigment than with RM.blO, Shows seme flotation, particularly with Ultra Blue, Carbon Black and Drop Black Sub*
Gives very gc od results, except in re gard to Carbon Black and Drop Black. Sub
Gives very geod results, except in regard to Carbon Black and Drop Black Sub., but is difficult to brush in Synthetic Itedis. due to feeding of this pigaent with the media.
Ooncluai on*
For Banish Bacon (and similar requirements) Antimony Cscide is indicated, although in no ca3e was there entire freedom from flotati oru
Better results on the srhcle were obtained with Idthopone and Bine Oxide, but these are ur desirable because of their inferior weathering proper-ties an alkyd media.
For Pompeian Quality tints vegetable Slacks (IM.163 Type) and Stop Blades (Bid. 58 Type) are indicated, and also Horastral and Prussian Blue with Zinc Csd.de ac the white constituent.
Synthetic and Oil Media gave similar results.
It is hoped to make use of the above work, alarmstde the conclusions drawn bynJfr. Qrabtree regarding his restricted mobility theory, namely as obtained by t'rs introduction of extenders imparting thixotropy.
Sftg.iJR SYffirUglO flllilSL
by
{K8n >
ffests sarrisd out on Rsapcisn Super Synthetic Berkeley Green .Finishing iiiarasl rGUiSSS taken from stock ax-3 thinned 5l,l and 1Q> wlah (571) {66) oad (414) rnpeetively
Ltrgo steel panels oore- Irushed out to cheek brushiic,flotation, din'ing gloss etc.
Brushing
} flotation
GlOS:
i
Drying
1. sfi-vi)
iirse brushing `
}
flight
is. lOhi xi) . More free
! Colour
than 0%
s ldeoper
little ibo i*o
;
tran on SC iS71) .
3. s^Tes)
Not as free { bad orate
: as &,t[ 571) j
;4.iQ<3e$T~~~ More free
] little wore
then 80{S6) f tran on
not equal to
5 '{86}
10^(571)
l Colour little
.{ asepsr .............
;5. ~5$TZl4)
almost ocual 5 &*>ro then on
to 5(S6} ....... s. 0
..................|
:e,ioS{4.\4) almost eoual j ';jt .^OnCsT'ill 1
to 10{36)
flotation
:
.......................... ...... 4 . CJtour 3eoper__J.
7.Straight
finasel
! Y olif*,ht
' PcS.B.-
sticky
oleoiJ
Cleaty
Fairly toriGtt Stiirljr Txriegfe
S 4-6 lire,' . Slight surface
!.. clemo............ 4 - 6 hrs. Fair surface
; clam
t
.1 ......................... ! 4 - 6 lire j O.K. f 4-6 hrs ; very slight 1 surface clam
Best
! 4-6 hrs
... O.K_._...........
Best
i 4-6 hrs
Close i V.sl.surface
uXsna
good
: o ,k . 4-6 hrs
iJe change ruede to standard fjailae as a result of those tests nevertheless the value of ejaployf.^ either {SR} or {414} in prewar Eenitoae Brushing and Spraying thtaners is Eubstontiotea nltkough a lowering is. cost by the use of petroieuu distillate {>?!< aoefto further investigation*
(6) Series Uo<, 53
k s mp a ii; sares ssn'g-iapic mms&
by
CjSEKB
(P.8B)
Tests have been carried out on P.-rapsiaa Super Syntiietic Srirmels Block* Oreen ?nfl White substituting all the SA .5291 ay an ecus! amount of SA5341 which is SA5291 ja&do cn Pentaoxythxitol* Toricus blends have alec beer, tried nsassly
505' SAS291
50$ SA5291 90?' 8A53S9
:.o &V5341 SA5341 -
:.o% SA5431
SA5S539 SA5291 made on Parala0 11W 1 15*7)
She straight enamels and also the blends have been exposed both on roof and ix. the MAtlas!' Weatharoae'-se* having been applied on steel panels treated as follows:
1 coat Grey ii-ijaex E" 4102 1 coat P.3.S. Bndereorvfcing 1 coat Enamel
All strEdght enamels and blonds ;;cve satisfactory gloss and fiMsh* Ko rivalling van apparent at time of exposure*
jimvxm axtt&aaa m.'i ya ^diHzeiUag b o k s s
by
i^lhSTAR
3ed Pride grii .sr B.6934 to 0*2*2351 norther ; ork has been done in a o. moation x?ith the cboxre m jerial,
following a c:i.j3plsiat that the paint ,:c.s gelling in a dip tarJc* In a pre*. ions report it was atat-;d the u the oxide in She formulation*
155894 was highly acidic* lasts were herefore mode to lotensinc whether this dafset \n s the cause of the instability of the primer*
SUP
Pi S 2 S'P S
(7)
Sori06 Ho. 53.
SgQTOB- gmSHSB 'JOB. raSgAffiXOAT-SD HOUSES
(Continues}
(p.ao)
Washing, t:ats
500 {Jems, of BMB4 were boiled ip twice with 4 litres cS water end filtered, dried and the pK chce :ed Ifter the treatment the pH was still too low. after treatmen; with 10$ of somonia fe Hewed by boiling and washing the pH was f Lnally increased to 7*3 is against 2.8 for the untreated pigment.
Samples of B6934 were then grousd in a ball mill uoing washed and uzsvashed 13504. Besalts ere tabulated below.
In on attempt to confirm the adverse affeot of acidity oa stability some titanium dioxide normally havi ig e pH of 7.6 was treat ad with 0.4$ cone obgSO^ to reduce the pH to 2*78 and ofter drying, this, together with the untreated pigment were used as i.-eplacewente for the oxite la BS234,
Accelerated stability teste in open containers at SSC were perfoso&d on these grindings and the foiltwin,* result obtained!-
Wsshed ; Unwashed s Acidified > Jntraated
; BM94 | KS4
Hm3
|; 5M?13
"1......... .... --.......... ..........
yH of piusnt
| 7.2
| 2.80
2.78
j 7.6
Viscosity of unthinned | paint Seconds a?C.4/ 25C
43
....1 . , ......
j 39
16S | SB
(thixotropic .
Viscosity after thinning before test Viscosity oftor
11 days or. test
1 25
i 26
f ....... i
j 300
| 6GO
I appro
28 } 27 66 } ~I7S
|
Conclaalota
The results confirm that a red;.ctlon la the acidity of BIS4 would greatly in,prove the stability of pai nts in which it was use:!.
In tt.e case of the titanium dicxido testa, the expected thickening with the e old pigment was ecmplotod during grinding, and did not continue during the stability teBt.
SI-IP
052894
(8) Series Bo55
S0yiW3 FlHtUfflS FOR KttRJHXCA.Ha? UD0SE3
(Continued)
(P.86)
Bofomuletion of B.6934
Several oxides have been testad by the Dry Colour Department ss possible replaeaments for Hw4. Dermox TOO from Itarris Ashby was
. .finally selected as the best all round alternative, having s pH of
62
Blanc fixe in the B.6936 was also replaced by whiting since this wee considered to impart greater stability and to give less trouble with settling. In this respect the fomnia has been brou^it into lino nith the off white primer B.6342.
She revised formula is r.ow;-
210 lbs Deanox TOO 170 * K52S Whiting
58 * HE.E7 China clay
54 galls ?.736v
20 "
(458)
15 *
(571)
Theoretical yield - 100 galls.
This .'onnula was tested to SS2251 and found to be satisfactory in all res;>eets. Gloss was slightly lower than the present mterial and stability was good after ageing in a closed drum far 7 weeks.
An accelerated stability test in an open container at 25cC showed no sign of gelation or deterioration of film forming properties after one weak. Viscosity increased *i)n 34 to 59 seconds.
sxaistass f o r msBagaioaMi b p q s is by
'! * it
[ t"o86;
D.D.?.3. 109
i k*
QXzz mQ&tv&a were stzs&e up i'lto fiaJLPMag JionelLs, applied on woefi over present-day priaor and undarcoat, and exposed in the lamp. ii.P.HoQ 971 - 976 jaeposed for 250 lira.
The- oix mediums vsesrei- 8A5->33, Barwlao 163C, Baralao vXX, 3A5239, SA5SJ1, and 3*3341.
-f':er exposure, the preson;-day medium 3A5S3S showed a marked
'-.UP
052S95
(9)
pmsi-ss f o r mmsexaism sgas (Continued)
Series J?o.53 (P.36,)
inferiority, being low in glosr and showing 'bad rain~s; -otting. SA5251 was about enual to 5A52J 3 on both oounta.
The "beat medium for gloss 'ms Peralac XSX, 'but it showed a tendency to fine blistering along the grain.
1118 two next heat wars 5Ai>VjL and Paralac 1XX.
(2) Absorption.
All the mediums used in tut .dag the mixings for the- above exposares were else tested for water absorption by the method given in Spacific&tiaa 2X17.
for the purposes of this fast each varnish was recuced to 2 poises and 1% VitOjL and 3906 were added.
Results in crass- were, dAi;i42 4.6&J .Parslao 11W k<.9M Paralac 16* 59& 8A5291 8.3y>; 1A5239 9.8,* SA5333 17.7&
Paralac llflr was used in these testa in place of 13X as it was considered more suitable.
(3) action.
In view of the general superiority of Parolac llWt it was decided to try to match it with a Berger product. A probable formula was evolved frem such information as was available, and th;3 formula was found to be very close to that of SA.5G72, although SA5172 has a zaich lower viscosity and higher acrid value than far&lac llVT,
Oanplete systems of crimer, Undercoat and fiuishii g were ground on Baralac 11',V, 16X and 3A5072, anu these are now under test.
Meanwhile attempts are being made to inrease the viscosity and decrease the acid value of &&5C72 to scjiieining nearer the figures for paralao 11W, while reducing the cocking time of 5 hours which is at present required, as this presents production difficulties.
''lit reduotian of acid value seems to be obtainable by using a good lop blew, while the inoreese in viscosity is being; sought by replacing part of the Patty Acids with Stand Oil V4201. -desults here are not yet sufficiently complete to be conclusive.
(4) Application Schedule.
Some confusion is still being caused by lack of infamotion as to the precise application schedule which the Blackburr Aircraft Co. is using, particularly as regards the drying time alloved t'er the primer I3DPB107.
Tests v,-ere put in hand to .find out how much the frnai finish is affected by recoating interval variations.
(10)
VmSBBS FOR. .HflSFABS1C AEX> HgCSES (Cctimed)
Series lTo52
One hs if of a wooden panel was -coated with primer ES626P and 22 hours i< ter the; other half was t oated in the same way. After a further i. hours two coats of usdtrcoat were applied all over the panel with a hour interval between coats. One coat finishing enamel was applied after a further hours*
Where the primer had been dri'd for only 2 hours iiacedinta lifting occurred along the grain <x\ application, of the finishing coat. This became less apparent when the enamel bad dried. The gloss on this oyteia ,?as higher than that in which the primer had drier, far 24 hours, tat was inferior to that obtained by allowing each coat of primer sti-i undercoat to ary for 24 hours.
The ps.nei referred to above h-js been placed on exposure on the. roof to see whether the lifting observed affects the weather resistance. E? Ho.1004; Sate exposed 10.10.46.
Valc^prene &.Q.
by J. BATE.
Series No, 53 {P.216,,)
.! new solvent
t o advocated by I.C.l. ltd. {suppliers
of the abate material) to overcome brushing ard spraying dif. icuit5.ee
oar; ourterer. with the criteteiu. solvnt faranla included in' ih-ir
original nctes.
iSixiTl
Dae new solvent form!* .r.sistxng of Xylol : S sxt 1 Stefan 1:1:2 by weigh' ,,,vss used as untier.'-
;
i asediam was sate? as foi' c*?si~
yulorpreus 10 25 .. ss= ;
(240)
- 25 ,
'Allowed ,:c si .:w ir.
-.-te
Sentcssc
-- 25 s:s ' fer 46 hours with c-: oasror.al
(433)
- 5" ax.) stirring.
Die viscous fairly classr-:-x- fcliorri ,;.g paint I'orfivulo.:-*
thus preiinsed w?au xsod ii
A.-:; SV 211715
'dadiuiii
- :ox - -l-'as,. ~ 12 ,na.
115 A-a.
SUP
~i o Q *7
(21)
FINISHES FOE BOBBER (Continued)
Series No. 53 (P.US.)
2his was ground in a psbble mill 72 hours, thinned with 80 gas of the solvent mixture (240): Sextens (433) 1:1:2 by weight. 5gme of Yuloafor Y.C.C. were added, stirred in and the paint brushed out on rubier. & slight tendency tc pull on the brush was noticed although not so bad as on the or iginal solvent mix.
'The paint was thinned rith the new solvent mix to lOJfr solid and sprayed cn to rlibber at 35 pounds air pressure. No ocbwebbing resulted but care was needed to prevent bud runs.
Slims produced whether brushed cr sprayed shewed excellent flexibility, but, although adhesion was good in the main body, the film could still be wariced up at the edges.
The new solvent mixture does not have any noticeable effect on the drying time.
The 1.0.1, claim that it is a better solvent sixture than that originally suggested has best substantiated.
miHmSaiEg
"by D. B. 3EA8
Series No.53. (P.117)
Present position.
large quantities of Seaplastite have bam made Airing recent rfonths. The bulb of production is White and and White base for tints, and these siave given little trouble as regards gloss when ground in a pebble mill for about 40 hours.
In the case of colours, however, there has bee a considerable trouble with haziness ai poor gloss. Grinding for periods up to 120 lours has not entirely eliminated this defact.
Also, there have been ocuplsints that stored films were insufficiently hard. The present medium SA5334 was adopted in place of SA5307 sane snaths ago after jonsideraticn of the preiuotian difficulties of the latter mediua. The possibility cf the hardness of SA5334 being inferior was reconsidered.
Erenar itign of Media.
une pot each of &A5307 ana 3AS334 was made to the present standard formulae, whioh wVe both oentrifuged hot, portions cf unoent'ifugod varnish being set aside far laboratory tests.
7 SUP
05 S 9 P
(12)
KEMEtASTH-S (Continued)
Series No.53 (P.'.l?.)
SSaaufacture
Vise of 50}-o of solids in (2A0) Vise of raedium in standard thinners Acid value of solids Colour cf varnish Solids " "
SA5534/S12
Held 1 hour A0 mins at 500F.
30 pois< s ,/25C
2.75 " 57.8
"
50.05$
3A5307/11A3
To std schedule. Held 5 mins at, 575F
then hosed down.
36 pcxb4e8 /25C.
22.7
"
6 ^,12$
After cooking the beads of tie two media were similar both being tcugh and showing a fracture when cold, the bead fir SA533A was slightly softer particularly when warm.
A small amount of gelatinous material was removed by centrifuging, the quantity being eanewhat greater in the case of SA533A.
Laborat cry grinding trials.
Small ball mill batches of Deep Lapis Keraplaatiue SA3519 were made under identical conditions using centrifuged and uncon1x1fuged SA5334- snd SA530?. Gloss was excellent and hardness satitsfactary in all cases and there was little cr no difference between tiie enamels in this respect.
Works trials.
Works grindings under ic.entical conditions were then made on the two centrifuged batches in a 100 gallon porcelain mil... The material chosen, was Boyal Blue Koiplastite SA3&14 since this has given considerable trouble with haziness in the past.
The grinding time given was i*A hours in each carte. The charge was 35 gallons for the SA5307 batch and 33 gallons for the SA533fe- batch, both to irate 100 gallons.
After grinding both batches were coupleted and centrifuged at the rate of 30 gallons par hour (output of twin centrifuges). Both gave a samewtat hazy film, though rather better in this respec t than recent production.
An increase of 5Qto extra medium was then made ci both batches and they war recentrifugea.
In each case a film of good gloss and hardness eras obtained, the batch made on SA5307 being slightly superior in both respects.
SUP
i
<13)
miTiASTITB (Continual)
Sarto* No. 53 (P.117.)
Conclusions.
SA3334- can be male to giva an entirely satisfactory result when used in Kcaplaatite if the correct prooedure is used in the manufacture jf-both the paint end melius.
To further check the results of SA5334- and SA53C7 five hatches of each are being mode under controlled conditions and these will he tested in works production of Keuplaatlte.
Th j relative inefficiency of the works centrifuge as compared with the laboratory model has again oeen demonstrated.
TmatST CHLOKINATED 3JBBER PAINT
Series No.53 (p. 119.)
ty g. WBTiLS
Performance teats were carried out on White and tinted XEJ.RI3T Paxn;s using 'irace "Dn Allop rene Chlorinated Rubber (High Viscosity), ihe material at present available as a replacement for
prewar Grade "B" (low Viscosity).
2.38 Medium
250 lhs Alloprene Grade "D" ex I.G.I. 85 galls. (1-58) H/g Naptha.
Z. >9 White
190 lhs. RM.713 Titanium White
6G galls. Z.3S.
12 ** C areclcr.
10 ' (+58)
Naptha.
12 " ii6) American `Turps.
Tfai White Finishing Hnamel was then tinted with the various
pigments to iheck comparative results.
i.e. Shade j.rodueed: =
Stone Colour
I'M. 62 Yellow Dobre
RJJ.742 Ferrite Xellcv
Pale Yellow
02664 Hansa Yell on
Pale Green.
C597 lime Green reduced with HM133 Chremiurn Oxide Slone Fixe
02664 Hansa Yellow BX8692 iionastral Blue
reduced with Blanc Fixe
light Red
BM97 Synthetic Danish Oxide RK93 Synthetic Scarlet Oxide 02058 Helio &ed
Pale 31ue
BY8692 Konastral Blue reduced with Blanc Fixe
7 sUP
952909
Kgtfgar 0&J3SXH. 73) mem j s h b t (Continued)
Ssrles Ma.53
(f.us.)
rthMitosI Resistance Test* *r* carried oat ter brushing
c m coat of notarial on tin plots, air dtyiag 2k hours, tlum placing nail amounta of tasting solution on tbs panel far 2k hours. The
panel* eare than cleaned and exaedned. The aoemry of the resalts
obtained la as fallom:-
Alkali, Resistance Acid Haglatanoe
14a Caustic and Caustio Mlat Cdw retention tm good in all oaaes, filata quite intact although softened slightly*
34* ^pdroahlcrio. files and colour retention quits satisfactory. 14* Sulphuric add. Alma and colour retention quite satisfactory. 14* Ittrie Add. Odour retention satist'aotacy. hat films blistered slightly.
104* Sulphuric also 54* Mitrio Add destroyed both files and odour whioh is to be expected from adds of this oonoontration.
lietdcMLd. All files sad odour retention quite satisfactory.
Solvents
xetroD. (569). Odour retention quite good. films brittle due to petard dissolving Oereoljcr ft*cm films.
White Spirit (23). films satisfactory. Colour retention very good except in case
of Usnsa tailor, which is partially reecved by thr.s solvent.
Alcohol (456). films satisfaotcry. Colour reten don very good,except in oases of Hetnsa Yellow, Time "Teen and Hello which are p;rteLally removed by tils advent.
Xylol (24.3)
) All films removed
Ethyl Lactate (631) ) immediately by
Carbon Telraohloride) these solvents.
wi. -------
liners! Oil (42). Colour retention very good, films softened slightly but intact. Caster Oil (197). All films badly softened
and easily removed. Idnsaed Oil (1). All films entirely removed.
SUP
952991
(15)
TCKUSTflT mrLORlHm-D RUBBER AA3HT (Continued)
Series Ho.53 (P.ll?)
general conclusions on above regalta,
Resistance to Acids and Alkalies very good, except in cases of higa concentration.
Contact with fairly strong solvents should he avoided, aid
in the cases of Helio ana lime ^'reen - Alcohol, and Hama - Alcohol and White Spirit should he avoided.
Resistance to mineral oils is satisfactory.
Practical Tests.
Spraying. Present 1 emulation (1 far sjsray applications.
39) ia unsatisfactory
Brushing. One coat application of this material gives quite
good results, hut where a 2 coat finish is required the
application of the second coat is extremely difficult on large surfaces, due to strong solvent action cf second coating, softening previous coat even after air drying for one '.reek. Addition of drying oils on varnishes, although improving recosting ti-ie, reduce the resistance properties of the film considerably. The use of undercosting for this material is still being investigated as the strong solvent action of the Keuriut is again causing trouble.
Attempts to use the substandard grace Alloptane "D" in
Xenriot type formulae are only partially successful. Sloes ia not good and two coat work is net satisfactory because Allcprene "D* is the wrong grade for spray. The subject will he reopened w..en better grades became available.
SUP
952902