摘要:
A cyclic phosphonite compound having the following formula (I) is disclosed and useful as a stabilizer for a synthetic resin. ##STR1## in which R1 is an alkyl, phenyl or an alkylphenyl, R2 is hydrogen or an alkyl, R3 is an alkyl, R4 is hydrogen or methyl and R1 and R2 may form an alkylene by linking each other.
摘要:
A synthetic resin composition comprises 100 parts by weight of a synthetic resin, 0.001 to 10 parts by weight of a cyclic alkylphosphite compound of 2,2'-alkylidene-bisphenol (I) and 0.001 to 10 parts by weight of beta-(3,5-dialkyl-4-hydroxyphenyl)-propionic acid ester (II) and is stabilized to light and heat.
摘要:
Stabilizers for enhancing the resistance of synthetic resins to deterioration when exposed to elevated temperatures and/or ultraviolet light comprising from about 0.001 to about 10 parts by weight of a bisphenol phosphite having the formula ##STR1## wherein R.sub.1 is tertiary-butyl or tertiary-amyl, R.sub.2 is alkyl having from one to about nine carbon atoms, R.sub.3 is hydrogen or alkyl having from one to about four carbon atoms, and R.sub.4 is alkyl having from one to about thirty carbon atoms; and from about 0.001 to about 10 parts by weight of a phenol having the formula ##STR2## wherein R.sub.5 is alkyl having from one to about four carbon atoms; and R.sub.6 is hydrogen or alkyl having from one to about four carbon atoms; and stabilized synthetic resin compositions comprising such stabilizers.
摘要:
Stabilizers for enhancing the resistance of synthetic resins to deterioration when exposed to elevated temperatures and/or ultraviolet light comprising from about 0.001 to about 10 parts by weight of a bisphenol phosphite having the formula ##STR1## wherein R.sub.1 is tertiary-butyl or tertiary-amyl, R.sub.2 is alkyl having from one to about nine carbon atoms, R.sub.3 is hydrogen or alkyl having from one to about four carbon atoms, and R.sub.4 is alkyl having from one to about thirty carbon atoms; and from about 0.001 to about 10 parts by weight of a phenol having the formula ##STR2## wherein R.sub.5 is alkyl having from one to about four carbon atoms; and stabilized synthetic resin compositions comprising such stabilizers.
摘要:
A synthetic resin composition stabilized particularly against the deterioration caused by the action of heat and light, which comprises 100 parts by weight of a synthetic resin, 0.001 to 10 parts by weight of a cyclic phosphite compound represented by the following general formula (I) and 0.001 to 10 parts by weight of a hindered amine compound having a group represented by the following general formula (II) in its molecule: ##STR1## wherein R.sub.1 stands for a tert-butyl or tert-amyl group; R.sub.2 stands for a C.sub.1.about.9 alkyl group; R.sub.3 stands for a hydrogen atom or a C.sub.1.about.4 alkyl group and R.sub.4 stands for a C.sub.1.about.30 alkyl group.
摘要:
Synthetic polymer compositions comprise 100 parts by weight of a synthetic polymer and 0.001 to 5 parts by weight of a benzotriazol compound, and thus possesses improved stability.
摘要:
A polyolefin composition comprises 100 parts by weight of a polyolefine which has been produced with use of a Ziegler catalyst and has a part or residue of the catalyst left therein, 0.005 to 1 part by weight of a phenol compound having the formula (I) and 0.005 to 1 part by weight of an organic phosphite compound having the formula (II). ##STR1## in which R is a residue group of an alcohol being monohydric, dihydric, trihydric or terahydric, R1 is methyl or tert.-butyl, R2 is an alkyl, --CH2CH2COOR3 or --COOR3, R3 being an alkyl, an aryl or an alkylaryl, and n is a number of 1 to 4.
摘要:
Stabilizer compositions are provided whose ingredients interact synergistically to improve the resistance to deterioration on heating of a variety of synthetic resin compositions. The interacting ingredients are (a) an organic phosphite having linked to phosphorus through oxygen at least two alkyl groups having from 6 to 20 carbon atoms and at least one organic group selected from polycyclic polyhydric phenol groups and pentaerythrityl groups, and (b) at least one carbonate ester of an ortho-substituted polyhydric phenol having in the molecule one to three benzenoid rings, two to three phenolic hydroxyl groups, and in each benzenoid ring one to two alkyl, cycloalkyl, or aralkyl groups of which at least one is positioned ortho to a phenolic hydroxyl group.Synthetic resin compositions are provided that are stabilized with the stabilizer compositions disclosed, including olefin polymers, polyamides, acrylic polymers, and vinyl halide polymers.
摘要:
This invention relates to a new class of polyhydric phenol carbonate esters and to synthetic resin stabilizer compositions comprising these esters as well as to synthetic resins stabilized with such esters and with stabilizer compositions comprising these esters along with known polymer stabilizers.
摘要:
A polycarbonate resin composition improved in heat resistance by the addition of an organic cyclic phosphite represented by the general formula: ##STR1## wherein R.sub.1 represents an alkyl group having 1 to 9 carbon atoms; R.sub.2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and R.sub.3 represents an alkyl group having 1 to 30 carbon atoms.