Crosslinkable polyolefin composition comprising high molecular weight silanol condensation catalyst
AssigneeBorealis Technology Oy
InventorRoger Carlsson
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Abstract
The present invention relates to a composition comprising (i) a crosslinkable polyolefin with hydrolysable silane groups (A), and (ii) a silanol condensation catalyst comprising an organic sulphonic acid (B) which comprises the structural element Ar—R1 (I) wherein Ar is an aromatic group, which may e.g. be a benzene, naphthalene, phenantrene or anthracene group, and R1 is an organic residue comprising at least 21 C-atoms, the organic sulphonic acid (B) further comprising one, two or more sulphonic acid groups, to an article, in particular a wire or cable, comprising such a composition, and to the use of such a composition for the production of an article.
Claims13
A process for producing an article comprising extrusion of a polyolefin composition comprising
- i. a crosslinkable polyolefin with hydrolysable silane groups (A), and
- ii. a master batch composition, comprising:
- (iia) a matrix polymer, and
- (iib) a silanol condensation catalyst comprising an organic sulphonic acid (B), the organic sulphonic acid (B) comprising one or more sulphonic acid groups and a structural element
- Ar—R1 (I)
- wherein Ar is an aromatic group, and R1 is an organic residue comprising at least 21 C-atoms, and wherein Ar may comprise from one to four R1 organic residues, and
- wherein the extrusion is conducted at a temperature in the range of 140 to 280° C., and wherein the composition is cross-linked to a maximum torque level of more than 50 Nm at a cross-linking rate of above 0.12 Nm/s.
Dependencies are inferred from the claim text.