Paint story: latex paint becomes stinky on the sidelines

Because of the working relationship, recently collated some information about water-based paint sterilization anti-mold agent, has been engaged in solvent-based paint research and development work, these have little experience, but these articles are written in depth, let people feel the complexity and cruelty of "bacterial warfare"!
also reminds me of the summer of 2010, when I was on a business trip with C, a latex paint chemist, to see the scene between 10, 000 people at a dealership in Jinan. A can of white latex paint open, into the eye, the surface of the paint floating some large and small bubbles, with stirring, the appearance of a similar state of latex gel clumps, mixed with gray stripes, and emit a burst of unpleasant odor. Not only C workers, even I am also very embarrassed, C workers stated that the formula has been improved, later will not appear problems
China
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I was working for the old national paint company B company, latex paint odor problem, from the beginning of 2009 onset, until the end of 2012 to completely solve, which is expected to expand the market B company caused some trouble, but also caused a lot of pressure on latex paint chemists. Technical meetings are often discussed, and the quality control, production departments jointly determine countermeasures, but also seek the help of microbicide suppliers, microbial testing agencies.
I've now re-read the relevant reports of the time and consulted some of my colleagues who were there at the time to try to restore the trajectory of the event, which is a thing of the past, but with a new look, the chemists of the future may learn from it."events mainly went through three stages:
1, June 2009, the market complaints latex paint degeneration, mainly odor, statistics found that color paint accounted for a large proportion, so this stage is considered to be the workshop process hygiene caused by the problem, so the direction is mainly warehouse and workshop process health system establishment and inspection, in addition to increasing the amount of fungicides in the formula.
2, 2010, prevention work continued, contact the fungicide company, sample test virulents, and test and evaluate and register new sterilization preservatives. But in the summer, some latex paint products have a bad accident, when in addition to odor, but also accompanied by gel, white paint graying and other phenomena, that is, I and C workers travel together in Jinan that time. However, C workers believe that the new measures have been implemented but have not yet worked, the later should not go bad again.
, in May 2011, the problem of perverting of the disease broke out again, and in June the C worker left his post and the R worker took his place.
first, still according to the idea of fungicides, because the high temperature season is easy to appear, so in other measures continue to find high temperature-resistant fungicides, CIT replaced with BIT, and began to cooperate with the microbicide company to carry out the analysis of latex paint residue of the effective content of fungicides, the result is safe content, but storage experiments proved not to be fully effective.
's the reason for this?
this time, the relevant personnel also from a different perspective to investigate, the Technical W Director noted that a high proportion of fillers in the formula replaced the source, and from the quality control department's test results and procurement department feedback to obtain evidence. The experiments carried out by R engineering show that it is easier to quickly simulate the phenomenon of badening with a storage test of 70 degrees C. So decided decisively to replace the filler with BIT-type fungicides.
by the end of 2012, the latex paint stinking incident subsided!to this point, the trajectory of the approximately reduced destinct event:
First, by the workshop management is not in place, half-products, slurry, paint tank, storage tank and pipe bacterial contamination, and caused by the odor.
Next, due to incremental fungicides and fillers containing sulfur, carbon, iron and other impurities exceeding the standard chemical reaction, and gel gel clumps, color change, odor and other degeneration phenomena;
solution: in addition to qualified fillers in the mining area, coupled with high temperature-resistant fungicides, double insurance, the problem can be completely solved.and understanding, at the same time, the major domestic brands of paint companies, are different degrees of occurrence similar to latex paint stink quality accident. Therefore, who can find out the nature of the problem as soon as possible and find a reasonable solution, in order to better foothold in the market!