peptize

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Related to peptizing: peptisation

peptize

(pĕp′tīz′)
tr.v. pep·tized, pep·tizing, pep·tizes
To disperse (a precipitate) to form a colloid.

pep′ti·za′tion (-tĭ-zā′shən) n.
pep′tiz′er n.
References in periodicals archive ?
Table 4 - carbon black incorporation as a function of peptizing agent Recipe A B C D SIR 10 96.
7% of the organic peptizing agent content and is lower by the factor 2-4 than that of the pure booster, Renacit 8 (B 300).
100 [degrees] C) on natural rubber of the commercially available peptizing agents based either on pentachlorothiophenol or on the pure booster Renacit 8 (B 300) were adjusted to similar levels; this is shown for various mastication times in figure 3.
In mastication on a mixing mill (at temperatures below 100 [degrees] C) activated peptizing agents are more effective than the zinc salt of pentachlorothiophenol.
Pandit[8] In systems without fillers these chemicals act virtually as stoppers of peptizing agents.
Hence only peptizing agents with high contents of organic active ingredient are suitable for one-step mixing procedures.
In one-step mixing the peptizing effect is greatest if the natural rubber and peptizing agent are put into the internal mixer first and then carbon black, zinc oxide, stearic acid, and possibly the other ingredients, are added after 60 seconds, for example.
The viscosity drop in the second or third mixing cycle is substantially the same with and without peptizing agents, and not, as might be expected, considerably greater.
Now that the effects of peptizing agents on raw compounds and the interactions of these substances with fillers and rubber chemicals have been discussed, we must consider how the vulcanizate properties are affected.
Not until the compound was softened excessively (Defo hardness 450) was the rebound resilience seen to suffer, but this drop was unrelated to the presence of the peptizing agents.
In addition the fatigue resistance on the fatigue to failure instrument (Monsanto) was determined for the vulcanizates containing the peptizing agents Renacit 7 (P45-B75) and Renacit 9 (P25-B175).
Differences between the pure booster Renacit 8 (B300) and the variously activated pentachlorothiophenol peptizing agents were not found.