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Master Bond adhesives

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Covestro Desmodur 352 + Baytec 352P + Baytec XL B 76A Polyurethane, MDI Ester
Categories: Polymer; Thermoset; Polyurethane, TS

Material Notes:

Information provided by Covestro

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.22 g/ccat processing temp, Desmodur 352
Viscosity 8.0 cPat processing temp, Baytec XL B
 105 - 175 cPat processing temp, Desmodur 352
 1620 cP
@Temperature 73.0 °C
at processing temp, Baytec 352P
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 76ASTM D2240
Tensile Strength at Break 16.6 MPaASTM D412
Elongation at Break 409 %ASTM D412
Resilience 27[%], Bayshore; ASTM D2632
Tear Strength 74.0 pliSplit; ASTM D1938
 409 pliDie C; ASTM D624
Taber Abrasion, mg/1000 Cycles 80mg loss; ASTM D3489
Compression Set 69 %
@Temperature 70.0 °C,
Time 79200 sec
ASTM D395-B
 
Processing PropertiesOriginal ValueComments
Processing Temperature 25.0 °CDesmodur 352
 45.0 - 60.0 °CBaytec XL B
 80.0 °CBaytec 352P
Mold Temperature 110 °C
Pot Life 4.00 - 5.00 min
 
Descriptive Properties
AppearanceliquidDesmodur 352
 liquidBaytec XL B
 white solidBaytec 352P
Content0.025Parts by weight of Dabco T-12 per 100 parts of Baytec XL B
 100Parts by weight of Desmodur 352 prepolymer
 1145 EWNCO, Baytec 352P
 15.11Parts by weight of Baytec XL B per 100 parts of Desmodur 352 prepolymer
 25.5-26.5%NCO, Desmodur 352
 302.11Parts by weight of Baytec 352P polyol per 100 parts of Desmodur 352 prepolymer
 45 EWNCO, Baytec XL B

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