1、MIL-P-50855 13 rn 9973 5*37*1I *_ - . - -_ .- MIL-P-50855 (MU) 31 March 1971 .- = .f MILITARY SPECIFICATION OLYVINYL ACETATE AQUEOUS EMULSION I f . ._ E (PAAE) (FOR USE IN AMMUNITEbN) %-l. SCOPE - 1.1 ?his specification covers one type of polyvinyl cetate aqueous emulsion and an aqueous solution of
2、chromic . - .nitrate catalyst for use as a binder in non-metallic cartridge 2 eases - . _- .2.- APPLICABLE DOCUMENTS . ., . . -%.l The following documents of the issue in effect on . -. . date of invitation for bids or request for proposal, form a par% of this specification to the extent specified h
3、erein. -. . _. -. . .STANDARDS - . :- : -. MILITARY M3UrSTD-109 - Inspection Terms and Definitions . . * . . -(Copies of specifications, standards, drawings and publications required by contractors in connection with specific procurement -Functions should be obtained from the procuring activity or a
4、s .directed by the contracting officer.) -I .2 Other publications,-The following docurhent forms a . i -partcrf this specification to the extent specifiedherein. 1 -Wnless otherwise indicated, the issue in effect on date of invitation for blds shall apply. . =- - -CODE OF FEDERAL mGULATIONS 49 CFR -
5、 171-190 - Interstate Commerce Commission Rules . . and Regulations for the Transportation of Explosives and Other Dangerous Art ic les The Interstate Commerce Commission regulations are now a part dem for the above publications should cite: “49 CFR 171-190 atest revision)“. the. Code of Federal Reg
6、ulations, available from the Superintendent f Documenb, Government Printing Officer, WashAngton, D.C. - .* /- THIS DOCUMENT CONTAINS 5 PAGES. - 7 -. I u- - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. -. .r . .“ -. . :- . . - . . 3* -REQUIREMENT
7、S 3.1 Material,-The solids content of the polyvinyl acetate ueous emulsion copolymer consists of 90 percent minimum by weight 1. :i ftylacetate, 2 to 5 percent N-methyl01 acrylamide and emulsified &y 3 %o 8 gercent polyvinyl.alcoho1. -. - -3*3.,3.- Total solids,-The total solids content of the emuls
8、ion shall be 50 to 53 percent by weight when determined . .* *s qpecified in 4.3.1. *. -. . .3*1.2 Viscosity,-The viscosity of the emulsion shall be Y,s0 to 7,500 centipoise (cps) when deterriiined as specified . 3.1.3 33aked insolubles.-The baked insoluble content of . tfie.emulsion shall be 94 per
9、cent minimum when determined as - 3n 4-3.2, .- -=. . .8.pecified in 4.3.3. af 43 to 46 percent chromic nitrate. .- -3.2 Catalyst.-The catalyst shall be an aqueous solution .-3,2,1 Color.-The oolor of the aqueous solution shall be 1. - in B dkrk green. .- 3.2.2 Specific Gravity,-The speolfic gravity
10、of the -. aqueous solution of the ohromic nitrate shall be 48.5 to . 49*5 degrsees baume when determined as specified in 4.3.4. - and She chromic nitrate aqueous solution shall be free from - . -3.-3 Workmanship,-The polyvinyl acetate aqueous emulsion 3mpurities auch as Good chips, oil, and solvents
11、 not specified. . . _. _. i QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection,-Unless otherwise specified in tihe contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. .or order, the supplier may use his own or an
12、y other facilities - suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections .set .forth in the specification where such inspections are deemed . .necessary to assure suppl
13、ies and services confqrm to prescribed Except as otherwise specified in the conkract irements, Reference shall be made to“Standard MIL-STD-109 der %a de.fne terms used herein. -: . _- -. -. - .- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. - * -
14、 -_ MIL-P-50855 (MU) 4.1.1 Submission of product.-At the tine the completed lot of product Its submitted to the Government for acceptance, the bontractor shall supply the following information, accompanied by.a certifica%e which attests that the information provied $8 correct and applicable to the p
15、roct being submitted: -6 : .- a. A statement that the lot complies with all of $he (aualSty assurance provisions specified within this specification, I . b. Drawing, spe-cification number and date, together with c A statement that all material purchased by the - an 5dentifi-cation and date of change
16、s thereto. . iontractor meets requirements , when such material is controlled -by Government or commercial specifications referenced in any of %he contractual documents, and that certificates of conformance L. are ufi file and available for review. d. Number of items in the lot. e. Date submitted. -
17、 The certificate shall be signed by a responsible agent of the oert%fyIng organization. The initial certificate submitted shall be substantiated by evidence of the agents authority to bind his principal. Substantiation of the agents authority willnot be required wlth subsequent certificates unless,
18、during 1 the course of the contract, this authority is vested in another agent of the certifying organization. z. 3.2 Inspection provisions this specification, refers to an inspection lot, which is -defined as en essentially homogeneous collection of units of poduct from which a,representative sampl
19、e is ,drawn and inspected $0 detemine conformance of the lot with applicable requirements . The sample selected shall respresent only that quantity of units from which the sanple .was drawn and shall not be construe to represent any prior or subsequent quantities presented for inspection. Homogeneit
20、y shall be considered to exist provided the lot has been produced- by one manufacturer, in one unchanged prockss, in accordance with the same drawing, specification, or revision thereof. - Changes to either the process, specification, not affecting safety, performance, interchangeability, or storage
21、, as determined by the Government, shall not be deemed to alter the homogeneity of the lot. -_ -% 4.2.1 Lot formation.-The term lot”, as used throughout . 4.2.2 . TesCing L,. . -. l o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ I - - - - .- -._
22、 . . - MIL-P-50855 (rJIu) 4.2.2.1 Sample,-A random sample of 10 containers shall -. . be seleced From each lot, all containers being of the same size. When lots are comprised of 10 containers or less, each container -_ -. shall be sampled. - . -4.2.2.2 ._ weparation of composite samples.-Four-ounce
23、samples .of PAM3 shall be removed from each of the ten containers selected . to lam a composite 8ample. The four ounces selected shall be lhcted to form two 20-ounce composlte samples. ,.39 eguirements specified, the lot shall be rejected. The two samples 11 be teste in accorclance with the-requreme
24、nts of 3.1 If either of the composite samples fails to meet the . _. + h.3 Test methods and procedures . . . 4.3.1 -T.otal-solld.- Run In dupzicate - Major .defect, Code No. 01001 (see 6.2).-Weigh rapidly into a tared aluminum -dish 1 to 2 grams of the emulsion. Place the dish and sampie . -$h a 130
25、C: oven for 30 minutes. Remob knd cool the dish and “sampe to room temperatur in a dess1ctoP. Reweigh the dish -id . . sample, Place 3n Che o . weight is obtained. . .Y again ad repeat above until .constan% ._ . . Dried Solids Weight X 100 = Percent Solids :. ._ Initial Sample Weight .I .4.3.2 . Vis
26、cosity.-Run in Duplicate, Major defect, Code No, Q200l.-The viscosity shall be determined in accordance with - -ASTM Method D 3084, Method B, using a No. 4 spindle at 20 RPM 4.3.3 .Baked insoluble (Run in duplicate) .- Major defect, -at 72B. .y .J- . Code No. OJOOl,-A six ml1 film shall be cast on a
27、 glass plate. -After the Film is dried, the film shall be stripped and placed - in between release paper. The film shall then be cured at 25OC and a relative humidity of 50 + 2 percent. the cured film shall be weighed in a 250 ml Erlenmeyer flask, and 3.00 rnl of acetone added. The solution shall be
28、 refluxed for 2 hours. The solution shall be cooled and 8 20 rnl portion shall be pipetted into a tared weighing dish. The solvent shall be a evaporated using a steam bath. The dish then shall be placed - in a 13OoC draft oven for 30 minutes or until a constant wecfght is obtained. Calculate the per
29、cent insoluble 88 follows: . A 0.5 gram sample of . - .- Percent insoluble = 100 (i - residue weight X 5) .- Initial film weight. (gms) I _- . . 4 r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- . . .- L - . . . .- . i . . -. 1 3.4 SpecrLfic gra
30、vity (run in duplicate) - M -a ,-The specific gravity shall be deterkned by *I,*- .=-. a stanaara Baume hydrometer for the range specified in paragrap, -. 3*2*2. a.ior defect- ,k *. .- .Fi PREPARATXON FOR DELIVERY -. 5.1 P8cking.-Polytrinyl acetate aGuaouS emulsion shall . be .packed and shipped In
31、such a manner as -%o Ansure acceptance by. ammon or other carrier for safe transportation at the lowest .pase to the point of delivery. Containers shall conform to the . -3CC Regulation, .* . 5.2 Marking.-Marking to insure safe handling shall conform 40 the ICC Regulations stipulated in the Code of
32、Federal . .- ring data.-Procurement documents should .specify tle, number, and date of this specficaton,. -:. . 6,2 Inspection code numbers.-The five-digit code numbers assigned to the.inspections herein are to facilitate future. data collection and analysis by the Government, - 6.3 Test results,-A
33、copy of the test resultsshould be .forwarded to: Commanding Officer, Picatinny Arsenal, ATTN: - SMUPJI-ND2, Dover, New Jer-sey 07801. - -. ., - .-6. 4 Polyvinyl acetate aqueous .emulsion.-An approved source of supply for PAAE Is National Starch and Chemical Corporation, i -75O Third Avenue, N.Y., New York, 10017. . Custodian8 . . .Arrny-MU O Preparing Activity: Army-MU Project Nuber: 1376-A=066 -_ . _. .- 5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
