The present invention relates to a polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst, and (A) a compound containing one or more POm(OnR)(OoR)(OpR″) groups, wherein R, R′, and R″ are the same or different organic residues;
The present invention relates to a polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst, and (A) a compound containing one or more POm(OnR)(OoR)(OpR″) groups, wherein R, R′, and R″ are the same or different organic residues; m is 0 or 1; n, o, and p each are 0 or 1; and n+o+p=1 to 3; a master batch for a crosslinkable polyolefin composition comprising a polymer and a silanol condensation catalyst and component (A), a stabilized polyolefin containing cross-linked silane groups wherein cross-linking has been performed by the use of a silanol condensation catalyst, further comprising component (A), and to the use of component (A) for stabilizing a polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst. The polyolefin composition of the invention can be used for pipe, wire & cable, film, fiber and molding applications.
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1. Polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst, characterized in that said silanol condensation catalyst is an organic sulphonic acid comprising 10 C-atoms or more and that said polyolefin composition further compri
1. Polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst, characterized in that said silanol condensation catalyst is an organic sulphonic acid comprising 10 C-atoms or more and that said polyolefin composition further comprises (A) from 0.04 to 0.4 wt % of a compound selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritoldiphosphite and di-stearyl-pentaerythrityl-di-phosphite; and(B) from 0.08 to 1.5 wt % of a non-phosphorous containing antioxidant selected from the group consisting of 1,3,5-tri-methyl-2,4,6-tris-(3,5-di-tert.butyl-4-hydroxyphenyl)benzene, 2,5,7,8-tetramethyl-2(4′,8′,12′-trimethyltridecyl)-chroman-6-ol, a butylated reaction product of p-cresol and dicyclopentadiene, and tetrakis-(methylene-(3,5-di-tert.butyl-4-hydrocinnamate))-methane. 2. Polyolefin composition according to claim 1 wherein the organic sulphonic acid contains the structural element Ar(SO3H)x with Ar being an aryl group which may be substituted or non-substituted, and x being at least 1. 3. Polyolefin composition according to claim 1 wherein the silanol condensation catalyst is present in an amount of 0.0001 to 6 wt %. 4. Polyolefin composition according to claim 1 wherein the crosslinkable polyolefin with hydrolysable silane groups is a polyethylene with hydrolysable silane groups. 5. Polyolefin composition according to claim 1 wherein in the crosslinkable polyolefin with hydrolysable silane groups the silane groups are present in an amount of 0.001 to 15 wt %. 6. Polyolefin composition according to claim 1 wherein the composition has an oxygen induction time of more than 30 min. 7. Article comprising the polyolefin composition according to claim 1. 8. Pipe comprising the polyolefin composition according to claim 1. 9. A polyolefin composition according to claim 1, wherein the total amount of compound (A) and antioxidant (B) in the composition is from 0.2 to 1 wt. %. 10. A polyolefin composition according to claim 1, wherein antioxidant (B) is selected from the group consisting of 1,3,5-tri-methyl-2,4,6-tris-(3,5-di-tert.butyl-4-hydroxyphenyl)benzene and tetrakis-(methylene-(3,5-di-tert.butyl-4-hydrocinnamate))-methane. 11. A polyolefin composition according to claim 1, wherein compound (A) is present in an amount of 0.4 wt. %; and wherein antioxidant (B) is present in an amount of 0.15 wt. %. 12. Polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst, characterized in that said silanol condensation catalyst is an organic sulphonic acid comprising 10 C-atoms or more and that said polyolefin composition further comprises (A) a compound selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritoldiphosphite and di-stearyl-pentaerythrityl-di-phosphite; and(B) a non-phosphorous containing antioxidant selected from the group consisting of 1,3,5-tri-methyl-2,4,6-tris-(3,5-di-tert.butyl-4-hydroxyphenyl)benzene, 2,5,7,8-tetramethyl-2(4′,8′,12′-trimethyltridecyl)-chroman-6-ol, a butylate reaction product of p-cresol and dicyclopentadiene, and tetrakis-(methylene-(3,5-di-tert.butyl-4-hydrocinnamate))-methane;wherein the amount of compound (A) and (B) is from 0.02 to 3 wt %. 13. Masterbatch for a crosslinkable polyolefin composition comprising a polymer and a silanol condensation catalyst, characterized in that said silanol condensation catalyst is an organic sulphonic acid comprising 10 C-atoms or more and that said masterbatch further comprises (A) from 0.5 to 3.5 wt % of a compound selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritoldiphosphite and di-stearyl-pentaerythrityl-di-phosphite; and(B) from 4 to 15 wt % of a non-phosphorous containing antioxidant selected from the group consisting of 1,3,5-tri-methyl-2,4,6-tris-(3,5-di-tert.butyl-4-hydroxyphenyl)benzene, 2,5,7,8-tetramethyl-2(4′,8′,12′-trimethyltridecyl)-chroman-6-ol, a butylated reaction product of p-cresol and dicyclopentadiene, and tetrakis-(methylene-(3,5-di-tert.butyl-4-hydrocinnamate))-methane. 14. Stabilized polyolefin containing cross-linked silane groups wherein cross-linking has been performed by the use of a silanol condensation catalyst, characterized in that said silanol condensation catalyst is an organic sulphonic acid comprising 10 C-atoms or more and that said stabilized polyolefin comprises (A) from 0.04 to 0.4 wt % of a compound selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritoldiphosphite and di-stearyl-pentaerythrityl-di-phosphite; and(B) from 0.08 to 1.5 wt % of a non-phosphorous containing antioxidant selected from the group consisting of 1,3,5-tri-methyl-2,4,6-tris-(3,5-di-tert.butyl-4-hydroxyphenyl)benzene, 2,5,7,8-tetramethyl-2(4′,8′,12′-trimethyltridecyl)-chroman-6-ol, a butylated reaction product of p-cresol and dicyclopentadiene, and tetrakis-(methylene-(3,5-di-tert.butyl-4-hydrocinnamate))-methane. 15. A stabilized polyolefin containing cross-linked silane groups wherein cross-linking has been performed by the use of a silanol condensation catalyst, characterized in that said silanol condensation catalyst is an organic sulphonic acid comprising 10 C-atoms or more and that said stabilized polyolefin comprises (A) a compound selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritoldiphosphite and di-stearyl-pentaerythrityl-di-phosphite; and(B) a non-phosphorous containing antioxidant selected from the group consisting of 1,3,5-tri-methyl-2,4,6-tris-(3,5-di-tert.butyl-4-hydroxyphenyl)benzene, 2,5,7,8-tetramethyl-2(4′,8′,12′-trimethyltridecyl)-chroman-6-ol, a butylated reaction product of p-cresol and dicyclopentadiene, and tetrakis-(methylene-(3,5-di-tert.butyl-4-hydrocinnamate))-methanewherein the total amount of compound (A) and antioxidant (B) from 0.1 to 2 wt. %.
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