Method for cross-linking a polymer article
AssigneeBorealis Technology Oy
InventorsMagnus Palmlof, Carl-Gustaf Ek, Gunhild Rohne
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Abstract
The present invention relates to a method for cross-linking a polymer article which comprises a cross-linkable polymer with hydrolysable silane groups and a crystallinity level of at least 30%. The cross-linking is performed in the presence of a silanol condensation catalyst comprising a compound of formula (I): ArSO3H or a precursor thereof, Ar being a hydrocarbyl substituted aromatic group comprising at least 14 carbon atoms.
Claims13
Method for cross-linking a polymer article comprising a cross-linkable polymer with hydrolysable silane groups and a crystallinity level of at least 30% wherein the cross-linking is performed in the presence of a silanol condensation catalyst comprising a compound of formula (I):
- ArSO3H (I)
- or a precursor thereof, Ar being a hydrocarbyl substituted aromatic group comprising at least 14 carbon atoms.
Method according to any of the preceding claims wherein the cross-linking is performed at a temperature below 80° C.
Method according to any of the preceding claims wherein the polymer is a polyethylene with a density of at least 923 kg/m3.
Method according to any of the preceding claims wherein Ar is a hydrocarbyl substituted benzene or naphthalene ring, the hydrocarbyl radical or radicals containing 8 to 20 carbon atoms in the benzene case and 4 to 18 carbon atoms in the naphthalene case.
Method according to any of the preceding claims, wherein the polymer has been produced by the use of a single-site catalyst.
Method according to any of the preceding claims, wherein the polymer has been oriented in at least one direction before the cross-linking is performed.
Dependencies are inferred from the claim text.