摘要:
A stabilizer for synthetic resins containing as an effective component a mixture comprising a phenol type compound (I) represented by the formula (I), ##STR1## wherein R.sub.1 represents a C.sub.1 -C.sub.3 alkyl group, and at least one sulfur type compound (II) selected from the group consisting of compounds represented by the formula (II-1), ##STR2## wherein R.sub.2 represents a C.sub.4 -C.sub.20 alkyl group, and compounds represented by the formula (II-2), ##STR3## wherein R.sub.3 represents a C.sub.3 -C.sub.18 alkyl group, and R.sub.4 and R.sub.5 independently represent a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, the weight ratio of phenol type compound (I) to sulfur type one (II) being 1 to 0.5-15.
摘要:
Polyolefin resins are thermally stabilized and are also stabilized against yellowing from nitrogen oxide gases by incorporating 3,9-bis[2- 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy -1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane.
摘要:
Polyurethanes are stabilized against yellowing by incorporating a phenolic type compound represented by the general formula (I) ##STR1## wherein R.sub.1 represents a C.sub.1 -C.sub.3 alkyl group and at least one member selected from a benzotriazole type light stabilizer and a hindered amine type stabilizer.
摘要:
Polyacetal resin compositions are stabilized to heat, oxygen and light by incorporation a phenolic type compound represented by the formula ##STR1##
摘要:
There are provided piperidine derivatives having the formula ##STR1## wherein R represents a hydrogen atom or a C.sub.1 -C.sub.3 group, and R.sup.2 and R.sup.3 represent a hydrogen atom or taken together, form ##STR2## There is also provided a method for producing the above compounds which comprises reacting a tricetonamine derivative represented by the formula ##STR3## wherein R has the same meaning as described above, or its salt with sorbitol.The subject piperdine derivatives are useful as stabilizers for preventing the deterioration of polymers by light.