公开(公告)号：CA939438A

公开(公告)日：1974-01-01

申请号：CA782747

申请日：1959-09-18

Applicant: STANDARD OIL CO INDIANA

Inventor： CASEY JOHN A ,  JEZL JAMES L ,  HAGUE LOUISE D

IPC: B29C63/18 ,  C08K5/00 ,  C08K5/13 ,  C08L23/12

Abstract: Polypropylene is stabilized with a composition comprising (a) a hundred phenol selected from 2, 4, 6 - trialkyl phenols, and phenols of the formula, where B is a radical selected from the group consisting of and wherein n is 0 to 8, one A on each ring is a hydroxyl group and the other is R1, X is selected from R and hydroxyl, R is a 1-16 hydrocarbon radical, and R1 is R or hydrogen, and (b) a thio compound selected from (1) metal dialkyl dithiocarbamates of the general formula where M is a Group IIa metal and R1 and R2 are hydrocarbon radicals of 1 to 6 carbon atoms, (2) trialkyl trithiophosphites, (3) thioethers of carboxylic acid esters of the formula, where r is a hydrocarbon radical, and n is an integer from 1 to 6, and (4) thioethers of the formula R-S-R, where R is a hydrocarbon radical. Components (a) and (b) are each present in the composition in an amount of 0,005 to 2 parts by weight. The composition may also include an epoxy resin such as one made by the condensation of a bisphenol and epichlorohydrin. TThe Specification mentions a large number of suitable ingredients for the composition. Compositions exemplified are (1) two ingredient systems consisting of 2,21-methylene-bis-(4-ethyl-6-t-butyl phenol) and zinc dibutyl dithiocarbamate, or dilauryl thiodipropionate, or dihexadecyl sulphide, 4,41\-methylene-bis-(2,6-di-t-butyl-phenol and dilauryl thiodipropionate, bis(2-hydroxy-3-t-butyl-5-methylphenylmethyl) durene and dilauryl thiodipropionate, or trilauryl trithiophosphite, 2-6-bis(2-hydroxy-3-t-butyl-5-methyl benzyl) 4,methyl phenol, and dilauryl thiodipropionate, 2,6-and zinc dibutyl di-thiocarbamate, or dilauryl thiodipropionate, or trilauryl trithiophosphite, or dihexadecyl sulphide, (2) three ingredient systems consisting of 2,21-methylene-bis(4-ethyl-6-t-butyl phenol) zinc dibutyl thiocarbamate, and calcium stearate or barium-cadmium laurate, 2,6-di-t-butyl-p-cresol, calcium stearate and dilauryl thiodipropionate or zinc dibutyl dithio carbamate, 4,41-methylene-bis(2,6-di-t-butyl phenol, dilauryl thiodipropionate, and calcium stearate or barium-cadmium laurate, 2,6-bis(2-hydroxy-3-t-butyl-5-methyl benzyl)-4-methyl phenol, trilauryl trithio phosphite, and butyl epoxy stearate, bis(2-hydroxy-3-t-butyl-5-methyl phenyl methyl) durene, dilauryl thiodipropionate, and calcium stearate, and (3) four ingredient systems consisting of 2,21-methylene-bis-(4-ethyl-6-t-butyl phenol) or 4,41-methylene-bis(2,6-di-t-butyl phenol, calcium stearate, an epoxy resin, and dilauryl thiodi-propionate or dihexadecyl sulphide, and 2,6-di-t-butyl-p-cresol, dihexadecyl sulphide, calcium stearate, and an epoxy resin. Polypropylene stabilized with the above compositions is stated to be resistant to heat degradation for periods in excess of 400 hours at 280 DEG F.

公开(公告)号：CA939439A

公开(公告)日：1974-01-01

申请号：CA811323

申请日：1960-11-18

Applicant: STANDARD OIL CO INDIANA

Inventor： CASEY JOHN A

IPC: C08K5/372 ,  C08K5/524