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公开(公告)号：JP2000007936A
公开(公告)日：2000-01-11
申请号：JP15537099
申请日：1999-06-02
Applicant: DEGUSSA
Inventor： STUEBBE ANDREAS , KLEINHENZ HORST , LEIMANN JUERGEN DR , KARL ALFONS
Abstract: PROBLEM TO BE SOLVED: To obtain high optical density and excellent abrasion resistance by blending a carbon black, a surfactant and water in a specific ratio. SOLUTION: This carbon black dispersion contains water, 1-40 wt.% carbon black and 1-30 wt.% surfactant. A pigment carbon black with an average primary particle diameter of 8-80 nm and a DBP value of 40-200 ml/100 g can be used as the carbon black. Preferably, a gas carbon black with an average primary particle diameter of 8-30 nm is used. A combination of two nonionic surfactants is used as the surfactant. The combination comprises (A) a crosslinked polyoxyethylene acrylic acid and (B) an alkyloxy ethylene wherein the ratio of B to A is preferably 1:2-1:10. In addition to the nonionic surfactants, anionic surfactants can be additionally used, which can prevent an increase in viscosity of the dispersion during storage.
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公开(公告)号：DE4402369A1
公开(公告)日：1995-08-03
申请号：DE4402369
申请日：1994-01-27
Applicant: DEGUSSA
Inventor： BARTHEL WALTER , KLEINHENZ HORST , LEIMANN JUERGEN DR , MATHIAS JOHANN DR
Abstract: A bitumen/carbon black concentrate (I) contains 1-45 wt.% carbon black (II) and has a Grindometer (RTM) value of less than 50 microns. Concentrates contg. up to 40 wt.% carbon black, e.g. Printex A powder (RTM), were prepd. by mixing bitumen B80 with the powder at 150 deg C. in a LUK 3IInS kneader (RTM). The Grindometer values obtd. (after dilution to 7.5% with more bitumen in a dissolver at 4000 r.p.m.) were less than 10 microns; stirrer speeds of 2000 rm.p.m. or less gave values of above 50 microns. The 7.5% concentrate was mixed with an asphalt compsn. contg. 7.5 wt.% bitumen, 9.98 wt.% filler, 20.4 wt.% sand and 62.6 wt.% grit, to give a final carbon black content of 0.6 wt.%. The prod. had a crack sensitivity (time taken to reach the inflection in the deflection/time curve) of 6300 secs.; this was increased to 11,000 secs. after accelerated weathering (500 hrs. in a Q-U-V appts. (RTM) at 50 deg C. with a 4-hr. moisture/irradiation cycle). (cf. 2900 secs., falling to 2400 secs. after weathering, with 0.6 wt.% pptd. silica instead of carbon black).
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公开(公告)号：DE4402369C2
公开(公告)日：1997-03-13
申请号：DE4402369
申请日：1994-01-27
Applicant: DEGUSSA
Inventor： BARTHEL WALTER , KLEINHENZ HORST , LEIMANN JUERGEN DR , MATHIAS JOHANN DR
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