초록

A cryogenic tank that is made leak-proof under cryogenic conditions by successive layers of epoxy lining the interior of the tank.

대표청구항 ▼

1. A cryogenic tank comprising: a tank configuration of suitable material to withstand cryogenic conditions; the interior of said tank configuration lined with consecutive layers of organic coatings, said layers comprising; a first layer of minimum thickness, from about 0.0001 to 0.001 in. thic

1. A cryogenic tank comprising: a tank configuration of suitable material to withstand cryogenic conditions; the interior of said tank configuration lined with consecutive layers of organic coatings, said layers comprising; a first layer of minimum thickness, from about 0.0001 to 0.001 in. thick, to establish a continuous coating for bonding; a layer subsequent to said first bonding layer of suitable thickness, from about 0.0001 to 0.001 in. thick, to establish bonding reliability; a layer subsequent to said bonding reliability layer of suitable thickness, from about 0.001 to 0.010 in. thick, to insure molecular impermeability; a layer subsequent to said molecular impermeability layer of suitable thickness, from about from 0.001 to 0.010 in. thick, to guarantee integrity at cryogenic temperatures; a layer subsequent to said integrity layer of suitable thickness, from about 0.0001 to 0.001 in. thick, to insure a smooth defect-free surface. 2. The cryogenic tank of claim 1 wherein said organic coatings comprise epoxy resins. 3. The cryogenic tank of claim 2 wherein said first bonding layer comprises the epoxy mixture of Table 1 and Table 3, as follows: [TABLE] TABLE 1 ______________________________________ THIN A-COMPONENT COMPOSITION Percent by Wt Ingredient (+0.010%) ______________________________________ Epon 1002 or 1002F 1 54.9 Dye, Oil Red PD15344 2 0.20 Isopropyl Alcohol (ASTM D770) 1.30 Xylene (ASTM D846) 2.80 Methyl Isobutyl Ketone (ASTM D1153) 5.60 Cyclohexanone, Tech. Grade 2.60 Methyl Ethyl Ketone (ASTM D740) 8.20 Normal Butyl Alcohol (ASTM D304) 2.60 1-Methoxy-2-Propanol Remainder ______________________________________ 1 Shell Chemical Co., Polymer Division #1 Shell Plaza, Houston, Texa 77002 2 Eaton Chemical Division, Western Eaton Solvents & Chemical Co., 13395 Huron Dr., Romulus, Michigan, 48174 [TABLE] TABLE 3 ______________________________________ THIN B-COMPONENT COMPOSITION ______________________________________ Ingredient Percent by Wt (+0.05%) ______________________________________ Diethylenetriamine 1.43 AEW = 34.4 to 37.0 g/eq Sp Grav = 0.945-0.955 Amido-Amine 3.53 Celanese, #1 Riverfront Plaza (Epi-Cure 855) Louisville, KY 40202 Epoxy Resin Solution 3.25 Shell, #1 Shell Plaza (Epon 1001 CX 75) Houston, TX 77002 Solvent Mixture Remainder (See Below) ______________________________________ Solvent Weight percent (+0.8%) ______________________________________ Toluene (ASTM D362) 5.24 1-Methoxy-2-Propanol 51.38 Isobutyl Alcohol 23.75 (ASTM D1719) Methyl Ethyl Ketone 7.85 (ASTM D740) Methyl Isobutyl Ketone 10.16 (ASTM D1153) Xylene (ASTM D846) 1.62 ______________________________________ said bonding reliability layer comprises the epoxy mixture of Table 1 and Table 3, said molecular impermeability layer comprises the epoxy mixture of Table 5 and Table 7, as follows: [TABLE] TABLE 5 ______________________________________ THICK A-COMPONENT COMPOSITION Ingredient Percent by Weight ______________________________________ Dye, Oil Red, PD15344 1 0.1 ± 0.01 Liquid Epoxy Resin Remainder Shell Epon 828 2 ______________________________________ 1 Eaton Chemical Division, Western Eaton Solvents & Chemical Co., 13395 Huron Dr., Romulus, Michigan, 48174 2 Shell Chemical Co., Polymer Division #1 Shell Plaza, Houston, Texa 77002 [TABLE] TABLE 7 ______________________________________ THICK B-COMPONENT COMPOSITION Ingredient Percent by Weight ______________________________________ P-Nonylphenol 1 45 ± 0.5 Versamid 125 2 45 ± 0.5 Mix well, then add 1-(2-Aminoethyl)piperazine 3 (Remainder) ______________________________________ 1 Eastman P7956 or equal, CAS Reg. No. 10440-5, Jan. 1979 2 Magnolia Plastics, Inc., Chamblee, CA; or Henkel Corp., Resin Div. 4620 W 77th St., Minneapolis, MN 55435 3 Eastman 10643 or equal, CAS Reg. No. 14031-8 said integrity layer comprises the epoxy mixture of Table 5 and Table 7, and said smooth defect-free layer comprises the epoxy mixture of Table 1 and Table 3.