Lanxess AG. said it is increasing its prices for biocidal active ingredients and formulations for industrial preservation by up to eight percent with immediate effect.

This is a result of the increases in the cost of raw materials auxiliaries and supplies over the past few months, according to Peter Weinmar, head of the material protection products business unit. The unit is part of the performance chemicals segment, which achieved total sales of 1.970 billion euros in 2007.


On June 1, The Dow Chemical Co. announced a price increase for all products by up to 20%, depending on the product’s exposure to rising energy, feedstock and transportation costs. The company also announced plans to review all terms to all customers.


Nalco Company, the leading provider of integrated water treatment and process improvement services, chemicals and equipment programs for industrial and institutional applications, is implementing an additional price increase to the Paper industry in North America, effective July 1, 2008. Nalco will also implement price increases in other regions of the world. The amount of those increases will reflect local cost growth.

Customers in the United States and Canada will see a tiered price increase. Pricing for most Nalco programs will increase up to 20 percent. Select programs, including the use of defoamers, gluteraldehyde, phosphate and polyphosphate chemistries, pulp mill surfactants, antiscalants, and pitch control surfactants, will increase 30 percent.

These price increases are driven by increased energy and raw material costs, tightening availability of some raw materials and rising freight costs. Nalco's Paper Services Account Managers will contact individual customers to discuss these increases.


Dow Biocides introduces CANGUARD ULTRA BIT 20 DPG Preservative, an enhanced version and drop-in replacement for CANGUARD BIT 20 DPG. A broad spectrum biocide that does not contain or release formaldehyde, CANGUARD BIT 20 DPG is useful for the protection of industrial water-based products against bacteria, yeasts and fungi and offers a number of benefits, including improved color, lower viscosity at low temperatures, and a slightly higher active percentage than the legacy product.

CANGUARD ULTRA BIT 20 DPG is a high-purity glycolic solution of benzisothiazolinone (BIT) that can be used under a broad range of pH and temperature conditions and under very alkaline conditions where other preservatives are often ineffective. Used for the preservation of polymer latexes and emulsion systems, water-based paints, coatings, adhesives and oil-in-water emulsions, CANGUARD ULTRA BIT 20 DPG is compatible with most anionic, cationic and non-ionic dispersants and provides outstanding chemical stability and good compatibility with most formulations.

"Dow Biocides continues to demonstrate its commitment to the paint and coatings industry by reacting to customer requests and improving upon its already effective in-can preservatives," said Ken Littel, global marketing manager, Dow Biocides. "CANGUARD ULTRA BIT 20 DPG provides customers with a lighter colored product that does not contain or release formaldehyde and offers great thermal stability."

Currently offering the industry's largest and most diverse product portfolio, Dow Biocides offers a product for many types of microbial challenges and system requirements. The performance capabilities range from high to low pH performance, quick kill to sustained performance and a range of registrations unparalleled in the industry.


Findings from independently verified field tests conducted by Viance LLC suggest that micronized copper preservative (MCQ) does not provide adequate protection against premature decay in wood products, particularly in ground-contact applications. Implications for aboveground applications are still unknown. These findings are discussed in a paper entitled, “Field Stake Tests with Copper-based Preservatives,” which were presented at the 39th Annual Conference of the International Research Group on Wood Preservation (IRG) in Istanbul, Turkey, May 25 – 29, 2008. The paper was presented by Viance’s vice president of research and development, Dr. Alan Preston.

Dr. Preston authored the paper with a team of fellow Viance scientists, including Dr. Lehong Jin, Dr. Andrew Zahora, Paul Walcheski and Dr. Kevin Archer, as well as independent scientists Dr. Darrel Nicholas and Dr. Tor Schultz.

Study Results

The on-going tests, set up in three geographically different, but complementary test locations are evaluating the performance of stakes cut from commercially treated wood. At all three locations,  several of the stakes treated with MCQ showed evidence of premature decay after only nine months of exposure. All stakes treated with solubilized copper preservative (alkaline copper quaternary or ACQ), however, showed no signs of decay. An independent wood scientist, Dr. Darrel Nicholas, inspected the stakes at the decay test sites and verified the findings.

The test results suggest that MCQ is not sufficiently active as a fungicide in wood preservatives, and that it does not provide adequate protection against premature decay, particularly in ground contact applications. Premature decay could lead to early product failure of treated wood products in service. “We are aware of how alarming the implications of our findings could be to people in the wood treatment industry,” said Steve Ainscough, president and CEO of Viance LLC. “We are making all the results of the study available to the public through the paper being presented to the IRG, including our test methodology and analytical results. We believe that a transparent dialog about this matter is the best way to prevent early product failure and damage to the industry as a whole.”

What Prompted the Study

“When micronized copper wood preservatives (MCQ) were introduced to the market in 2006,” said Dr. Alan Preston, “some scientists questioned if micronized copper could penetrate wood cell walls to prevent soft rot for wood in service. In the absence of comprehensive, publicly available scientific information about the comparative performance of micronized copper wood preservative systems, our scientists initiated the study to get answers to these questions. The results so far surprised and concerned us, and as a responsible supplier we are sharing our findings with the industry.”