摘要:
Copolymers containing triarylsilyl(meth)acryloyl units are erodible in seawater and can be used to formulate antifouling marine paints. The copolymers are characterized by low levels of triarylsilyl(meth) acrylate units and an erosion rate in seawater of 2 to about 15 µm per month.
摘要:
Copolymers of at least three monomer units selected from the group consisting of fluorinated acrylic (methacrylic) monomers, triorganosilylacrylic (e.g. trimethylsilyl methacrylate) monomers and acrylic monomers not containing an organosilyl moiety, (e.g. methyl methacrylate) and optionally containing from 0-5 weight percent of a cross-linking agent are novel compositions useful as polymeric binders in long life marine antifoulant coatings. The erosion rate and resistance to cracking of the copolymer of the present invention when used as a binder in a marine antifoulant paint is controlled by adjusting the proportions of each monomer and the amount of crosslinking agent in the copolymer of the present invention
摘要:
A method of purifying acrolein or propionaldehyde with a single column distillation system is provided, where the distillation system has a side-draw take-off outlet for recovering purified acrolein or propionaldehyde located between the crude product feed point and the light-boiling impurities distillation site.
摘要:
A method for isolating 32 from a crude mixture containing HCl and an azeotropic mixture of 32 and HF is provided without the need to isolate any HF azeotrope.
摘要:
The invention concerns a composition of organotin maleates of high molecular weight resulting from reacting an alcohol or an epoxyalkane of high molecular weight with maleic anhydride, then in contacting the resulting medium with a dialkyltin oxide. The invention also concerns the polyvinyl chloride (PVC) stabilised with said composition with base of organotin maleates of high molecular weight and the rigid extruded objects formed from said PVC compositions.
摘要:
The invention relates to a combination of compounds and a process using such combination useful for reducing or preventing coke formation in thermal cracking furnaces such as ethylene steam crackers. The combination is comprised of one or more compound of the formula R-S x -R ' and one or more compound selected from the following group: