Process for increasingly producing D-Lactide and meso lactide by depolymerizing by back biting polylactide (PLA) said process which comprises: (i) Depolymerizing polylactide into its corresponding dimeric cyclic esters by heating the polylactide in the presence of a catalyst system comprising a catalyst and a co-catalyst in a reaction zone at temperature and pressure at which the polylactide is molten; (ii) Forming a vapor product stream from the reaction zone; (iii) Removing the vapor product stream and optionally condense it; (iv) Recovering, either together or separately meso-lactide, D-lactide and L-lactide.

A coated fiber comprising a fiber comprising polyester, and a coating on the fiber, said coating comprising a cross-linked silicone prepared by cross-linking on the fiber one or more silicon-containing compounds selected from an organosilane and organosilicone resin, wherein at least one of said silicon-containing compounds has at least three cross-linking groups is provided, together with a method of preparing such a fiber, a concrete composition comprising such coated fibers, and a method of preparing such a concrete composition.

A coated fiber comprising a fiber comprising polyester, and a coating on the fiber, said coating comprising a cross-linked silicone prepared by cross-linking on the fiber one or more silicon-containing compounds selected from an organosilane and organosilicone resin, wherein at least one of said silicon-containing compounds has at least three cross-linking groups is provided, together with a method of preparing such a fiber, a concrete composition comprising such coated fibers, and a method of preparing such a concrete composition.

Lipophilic fibers are effective media for cleaning non-aqueous fluids out of a subterranean wellbore. The fibers are preferably added to a drilling fluid, a spacer fluid, a chemical wash, a cement slurry or combinations thereof. Non-aqueous fluids, such as an oil-base mud or a water-in-oil emulsion mud, are attracted to the fibers as they circulate in the wellbore.

Lipophilic fibers are effective media for cleaning non-aqueous fluids out of a subterranean wellbore. The fibers are preferably added to a drilling fluid, a spacer fluid, a chemical wash, a cement slurry or combinations thereof. Non-aqueous fluids, such as an oil-base mud or a water-in-oil emulsion mud, are attracted to the fibers as they circulate in the wellbore.

The present invention relates to a coating composition and method of manufacturing said coating composition. The coating composition is a two-component coating composition for construction surfaces. The present coating composition is effectively bonded to the surface without an additional application of intermediate layer overcoming the existing problems associated with conventional concrete surface treatment methods.

The present invention relates to a coating composition and method of manufacturing said coating composition. The coating composition is a two-component coating composition for construction surfaces. The present coating composition is effectively bonded to the surface without an additional application of intermediate layer overcoming the existing problems associated with conventional concrete surface treatment methods.

This disclosure is directed to an improved ballistic concrete barrier for stopping projectiles with a kinetic energy of between about 1.0 kJ (750 foot-pounds) and 20.3 kJ (15,000 foot-pounds) in between about 3 inches and 10 inches.

This disclosure is directed to an improved ballistic concrete barrier for stopping projectiles with a kinetic energy of between about 1.0 kJ (750 foot-pounds) and 20.3 kJ (15,000 foot-pounds) in between about 3 inches and 10 inches.

The present disclosure relates to support blocks that can be used for decks and foundations fabricated from polymer concrete. Yet further, the present disclosure relates to deck, floor, and foundation systems comprising the disclosed support blocks. The support blocks can mate with or otherwise serve as foundation elements for use in conjunction with construction elements such as posts, joists, stringers, mounting frames, and equipment, among other things.