Article coated with a composition comprising polyethylene prepared with a single site catalyst
View Patent ↗The present invention relates to an article coated with a composition comprising (A) an ethylene homo- or copolymer resin which has been prepared by using a single-site catalyst further characterized in that component (A) has an MFR 21 , measured according to ISO 1133 at 190° C. and under a load of 21.6 kg, from 0.01 to 20 g/10 min. The present invention further relates to an article coated with a composition comprising (A) an ethylene homo- or copolymer resin which has been prepared by using a single-site catalyst further characterized in that component (A) has an impact strength at −40° C. of at least 80 kJ/m 2 in a Charpy notched test according to ISO ISO 179-1/1eA:2000 with a pendulum energy of 15 J. The invention is furthermore directed to the use of the composition for the coating of an article.
1. A pipe coated with a composition comprising
(A) an ethylene homopolymer resin which has been prepared by using a single-site catalyst,
wherein the amount of component (A) is not less than 80 wt % of the composition,
further characterized in that
component (A) has an MFR 21 , measured according to ISO 1133 at 190° C. and under a load of 21.6 kg, from 0.01 to 20 g/10 min, a molecular weight distribution (MWD) of 1 to 5, and a density of at least 940 kg/m 3 , and is unimodal.
2. A pipe coated with a composition comprising
(A) an ethylene homopolymer resin which has been prepared by using a single-site catalyst,
wherein the amount of component (A) is not less than 80 wt. % of the composition,
further characterized in that
component (A) has an impact strength at −40° C. of at least 80 kJ/m 2 in a Charpy notched test according to ISO 179-1/1eA:2000 with a pendulum energy of 15 J, a molecular weight distribution (MWD) of 1 to 5, and a density of at least 940 kg/m 3 , and is unimodal.
3. The pipe according to claim 2 , wherein component (A) has an MFR 21 , measured according to ISO 1133 at 190° C. and under a load of 21.6 kg, from 0.01 to 20 g/10 min.
4. The pipe according to claim 1 or 2 , wherein the amount of component (A) is not less than 85 wt. % of the composition.
5. The pipe according to claim 1 or 2 , which is a steel pipe.
6. A method for coating a pipe with a composition comprising
(A) an ethylene homopolymer resin which has been prepared by using a single-site catalyst,
wherein the amount of component (A) is not less than 80 wt. % of the composition,
further characterized in that
component (A) has an MFR 21 , measured according to ISO 1133 at 190° C. and under a load of 21.6 kg, from 0.01 to 20 g/10 min, a molecular weight distribution (MWD) of 1 to 5, and a density of at least 940 kg/m 3 , and is unimodal.
7. A method for coating a pipe with a composition comprising
(A) an ethylene homopolymer resin which has been prepared by using a single-site catalyst,
wherein the amount of component (A) is not less than 80 wt. % of the composition,
further characterized in that
component (A) has an impact strength at −40° C. of at least 80 kJ/m 2 in a Charpy notched test according to ISO 179-1/1eA:2000 with a pendulum energy of 15 J, a molecular weight distribution (MWD) of 1 to 5, and a density of at least 940 kg/m 3 , and is unimodal.
8. The method according to claim 6 or 7 , further characterized in that the article is a steel pipe.
9. The method according to claim 8 , further characterized in that the composition is used as topcoat material for steel pipes for transport of oil or gas.