Specialty chemicals company Perstorp, supplier of caprolactones and its derivatives, has announced the investment to double the production capacity of its Warrington, UK site is on track to reach mechanical completion by the end of the year and begin commissioning in early 2011. The full capacity expansion is expected be on stream in the summer of 2011. According to the company, the market for caprolactone-based technology is growing rapidly by more than five percent per year. Caprolactones are used in coatings, adhesives, sealants and elastomers applications.