CORRECTION - "Evaluation of Organic Fluorine Compounds for Use

May 1, 2002 - CORRECTION - "Evaluation of Organic Fluorine Compounds for Use in Military Aircraft". Harold Rosenberg. Ind. Eng. Chem. , 1954, 46 (10),...
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INDUSTRIAL AND ENGINEERING CHEMISTRY

2260

TABLE XVII. SUNM.4RIllED SOLVEKT AND FREEZE RESISTANCE (Continued)

Monomers BD/S/MIK

BD/MIK BD/MIK

Monomer Ratio

Po!ymerization Temp.,

Emulsion Polymere 67/23/10 62/23/10 57/23/20 52/23/25 42/23/35 80/20 95/5

90/10 90/10 85/15

s0/20 80/20

’ F.

Gehman

InT , ~ ~Vol. creaSea

VaJue C.

-

COR’CLUSIONS 43 34

163 130

-2 49

56 180

86 86 104

70 GO 57

317 244 218

104 86

54 51

41

41 43

238 152 145 144

122

:,”

75/25

41 104

BD/DCBD

85/15 85/15)

122

BD/DCBD

85/15

122

90/10

122

95/5

122

50 70 64 69 66 62 67 70

85/15

122

72 69

141 95 130 125 163 141 129 135 135 130

72

199

67 59 51 46

205 192

90/10

85/15 80/20 95/5 90/10 85/15

BD/TCE BD/MCDFE BD/DCDFE BD/IBM BD/P-EEA

122

~

41

~

75/25 70/30 90/10 85/15 70/30 75/25 90jl0 70/30 70/30 20/50 ,0/25/5 50/45/5 50/40/10 50/30/20

41

i1 1

50/40/10 50/30/20 50/20/30

75/25 BD/S copolymer. The resistance to oils and solvents of the experimental polymers mas relatively unaffected by an increase in the styrene charge (Figure 14). As expected, the Alfin polymers containing oil were poorer than Paracril 18-80 with respect to resistance to oils and solvents.

(7 days a t 77’F),%

80/20

BDIBAP

Vol. 46, No. 10

39

167

;g

g;.54 68

;169 ge; 169

146 180

122

74 70 60 51 60

20.3 205 169 163 192

41

66

41

63 5? 50

173 146 163

104

;; 33

120 86 82 56

47

g

125

52

105

39

104

149

An examination of a large number of elastomers (summarized in Table XVII) revealed that Alfin catalyzed polybutadiene and emulsion copolymers of butadiene with relatively small proportions of acrylonitrile and large proportions of methyl isopropenyl ketone exhibited minimum dimensional changes on prolonged contact with the test oil and solvents. The oil and solvent reEistance of these polymers was comparable to that of Paracril 18-80. However, the flexibility a t low temperatures of the acrylonitrile and methyl ieopropenyl ketone polymers was entirely unsatiefactory. Alfin-catalyzed polybutadiene possessed the requisite freeze resietance but, unfortunately, the compounding of Alfin polybutadiene and mixing of this material in conventional equipment have presented processing problems. LITERATURE CITED

(1) Bartholomew, E. R., Rubber A g e , 72, 84 (1952). (2) Duke, K. G., and Mitchell, W.A., I n d i a Rubber W o r l d , 128,485 (1953). (3) Hohn, F. J., Martin, R. E., and associates, presented at the 122nd lIeeting, B C S , Atlantic City, Tu’. J., September 1952. (4) Laundrie, R. F., Feldon, M., and Rodde, A. L., IND. E m . CHEN., 46, 794 (1954). (5) Marvel, C. S., Clarke, K. G., and associates, Ibid., 45, 2090 (1953). (6) Marvel, C. S . , Fukuto, T. R., and associates, J . Polymer Sci., 8, 599 (1952). (7) Marvel, C. S., Menikheim, V. C., and associates, Ibid., 10, 39 (19531. (8) hlarvel, C. S., Peterson, W. R., and associates, IND.ENO. CHEM.,45, 1532 (1953). (9) Marvel, C. S., Kllliams, J. R., and Baumgarten, H. E., 9. Polymer Sci., 4, 583 (1949). (10) hIoche1, W. E., Salisbury, L. F., and associates, IND. EXQ. CHEM., 40, 2285 (1948). (11) Moll, R. A, Honlett, R. AI,, and Buckley, D. J., I b i d . , 34, 1284 (1942).

(12) Postelnek, W., Chem. Eng. News, 31, 1958 (1953). (13) Saloinon, A, J . Polymer Sei., 3, 32 (1948).

100 86

RECEIVED for review U a r c h 19, 1954.

Alfin Polymers BD BD/S/white oil

100 75/25/33 75/25/33

100

47-126 88-114 124-130

70 45 30

47-125

67 68

%/S

60

59

86

80/20

1

77.5/22.5, 75/25 J

BD/Circ.-2XH BD/S/Circ.-BXH

100/49 97.5/2.5/52 95/5/47 92.5/7.5/53

90/10/52

87.5/12.5/55 a 85/15/82 82.5/17.5/55 80/20/53 77.5/22.5/55 77.5/22.5/76

?53; 50 45 44 40

5G

115 160 44 100 125 146 152 163 lfi3 163 163

193 193

59

looc

57 55 52

115 l5 130’

BQ .37

2;

44 43 38 40 36

l00C 110:

~~~~

120 135 120~ 135 l l 0 C

A C C E P T E D April 5, 1954. Work performed as a part of the research project sponsored by the Reconstruction Finance Corp., Office of Synthetic Rubber, in connection with t h e government synthetic rubber program.

Evaluation of Organic Fluorine cornp o ~ d for s Use in Military AircraftCorrection In the article “Evaluation of Organic Fluorine Compounds for Use in Military Aircraft” [IND. EKG.CHEU.,45, 2283 (1953)], changes are given for the boiling point, peak in the flammability curve, and order of effectiveness on both a volume and weight basis of bromotrifluoromethane in Table I. The authors are indebted to J. E. Malcolm, Engineer Research and Development Labs., Fort Belvoir, Ya.! for calling attention t o the errors in the original table. B.P., O C .

a In mixture of 60% iso-octane, 5% benzene, 15% xylene, and 20% toluene, by volume. b 60/40 iso-octane/toluene, b y volume. Immersed for 9 days.

CFaBr BromotrlAuoromethane -57 WRIQHTAIR DEVELOPMEKT CEUTER AIR FORCE BABE,

WHIGAT-PATTERBOX

peak in Order of Effectiveness Volume Weight Flamm. basis basis Curve. % 3 2

HAROLD ROSENBERQ OEIO