Abstract: New hindered piperidinoalcohol 1,1,1-trioxyalkanes are disclosed. In the 1,1,1-trioxyalkanes, at least on 1,1,1-trioxyalkane group is linked to the residue of an alcohol linked to the 4-position of a 2,2,6,6-tetraalkylpiperidine compound having 12 to 75 carbon atoms. For each 1,1,1-trioxalkane group, there are 1 to 3 tetraalkylpiperidine groups. The alkyl groups linked to the piperidine ring have from one to five carbon atoms each. The fourth substituent on the carbon atom of the 1,1,1-trioxyalkane is a hydrogen atom or an aliphatic group having one to five carbon atoms.The disclosed 1,1,1-trioxyalkanes protect a variety of synthetic resins against the deteriorative effects of exposure to actinic light.Stabilizer compositions comprising a disclosed 1,1,1-trioxyalkane and a known polymer stabilizer, as well as synthetic resin compositions stabilized with such stabilizer compositions, are also disclosed.

Abstract: A process is provided for the preparation of mercaptoalkane 1,2-dicarboxylic acid esters from readily available starting materials such as hydrogen sulfide and unsaturated alkene 1,2-dicarboxylic acid compounds. Isolation of the intermediate mercaptoalkanedicarboxylic acid can be avoided when a mercaptoalkanedicarboxylic acid ester is the desired product.

Abstract: Organotin mercapto dicarboxylic acid esters are provided having either substantially no odor or a remarkably low odor, and capable of imparting to polyvinyl chloride resin compositions when heated at elevated temperatures an enhanced resistance to early discoloration as well as an enhanced resistance to long term discoloration, without any obnoxious mercaptide odors.A process is provided for preparing organotin mercapto carboxylic acid esters by reaction of a monohydric alcohol or mixed monohydric alcohol-glycol mercapto dicarboxylic acid ester with an organotin oxide or halide, and then, if the mercapto dicarboxylic acid ester is of a monohydric alcohol only, transesterifying this reaction product with a glycol.Polyvinyl chloride resin compositions are also provided containing such organotin mercapto carboxylic acid esters, and having an enhanced resistance to both early and long term discoloration, without any obnoxious mercaptide odor.

Abstract: Polyvinyl chloride compositions suitable for use as food packaging materials are stabilized against the degradative effects of heat using a mixture of di-n-octyltin-S,S'-bis(isooctyl mercaptoacetate) and an oligomeric form of di-n-octyltin maleate wherein the weight ratio of the two component stabilizers is between 1:3 and 4:1, respectively. The combination of stabilizers imparts a greater degree of stabilization than can be achieved using either component at a concentration equal to that of the mixture, as evidenced by a delay in the appearance of severe discoloration during exposure to temperatures of 250.degree. C. and higher.