48 results about "Molar mass distribution" patented technology

The invention relates to a polyethylene and catalyst composition for its preparation. Polyethylene which comprises ethylene homopolymers and / or copolymers of ethylene with 1- alkenes and has a molar mass distribution width MW / Mn of from 3 to 30, a density of from 0.945 to 0.965 g / cm3, a weight average molar mass Mw of from 50 000 g / mol to 200 000 g / mol, a HLMI of from 10 to 300 g / 10 min and has from 0.1 to 15 branches / 1000 carbon atoms, wherein the 1 to 15 % by weight of the polyethylene having the highest molar masses have a degree of branching of more than 1 branch of side chains larger than CH3 / 1000 carbon atoms, a process for its preparation, catalysts suitable for its preparation and also injection moldings in which this polyethylene is present.

Pressure-sensitive adhesives containing at least one functionalized polymer or block polymer having a weight average of the molar mass distribution of between 5,000 g / mol and 200,000 g / mol and a difference between Mp and Mmin which is lower than 25,000 g / mol, where Mp represents the peak molar mass of a monomodal polymer or the peak molar mass of the smallest mode in a bimodal or multimodal polymer and Mmin represents the lowest molar mass in the molar mass distribution, defined at each point where the cumulative frequency of the molar mass distribution has a value of 0.05, the functionalized polymer or block polymer carries at least one type of functionalization that can be used for a subsequent cross-linking and the at least one type of functionalization of the functionalized polymer results from the use of at least one type of functionalized monomer during the production of the functionalized polymer.

To provide a method that reduces an influence of dependence of an ionizing beam in an incident direction or uneven irradiation to a sample on a result of mass spectrometry, and can measure mass distribution with high reliability. A mass distribution measuring method according to the present invention includes: changing a direction of irradiating the ionizing beam to a sample surface; acquiring a plurality of mass distribution images in a plurality of incident directions; performing image transform of the mass distribution images according to an angle formed by an incident direction of the ionizing beam and a substrate surface; synthesizing the plurality of transformed images; and outputting the synthesized mass distribution images.

The invention relates to a polyethylene molding composition having a multimodal molar mass distribution particularly suitable for blow molding films having a thickness in the range from 8 to 200 μm. The molding composition has a density at a temperature of 23° C. in the range from 0.953 to 0.960 g / cm3 and an MFR190 / 5 of the final product after extrusion in the range from 0.10 to 0.50 dg / min. The composition comprises from 30 to 60% by weight of a first ethylene polymer fraction made of a homopolymer A having a first molecular weight, from 22 to 40% by weight of a second ethylene polymer fraction made of a further homopolymer or first copolymer B of ethylene and at least one first comonomer from the group of olefins having from 4 to 8 carbon atoms, the first copolymer B having a second molecular weight higher than the first molecular weight, and from 10 to 30% by weight of a third ethylene polymer fraction made of a second copolymer C having a third molecular weight higher than the second molecular weight. The molding composition of the invention allows to produce thin films having improved processability without impairing the mechanical properties.