Adhesive hot-melt formulations with a main polymeric component, of at least one isotactic metallocene butene-1 polymer composition, that has a low viscosity, and that has a bimodal composition, directly obtained during polymerization, in two consecutive and separate reaction steps. Moreover, said hot-melts include less than 5% by weight of at least one viscosity modifier that is not solid at room temperature. Such unusually low level of said additives, surprisingly allows to attain substantially improved levels both of high adhesiveness and cohesion. The adhesive hot-melt formulations include less than 5% by weight of a polyethylene wax or of a blend of polyethylene waxes, that characterized by a highly linear/non-branched structure and by an exceptionally low Polydispersity Index. The presence of such peculiar polyethylene waxes, that are partially incompatible with the butene-1 polymer composition, allows to use the disclosed hot-melt formulations even in the presence of fibrous or perforated substrates.

Adhesive hot-melt formulations with a main polymeric component, of at least one isotactic metallocene butene-1 polymer composition, that has a low viscosity, and that has a bimodal composition, directly obtained during polymerization, in two consecutive and separate reaction steps. Moreover, said hot-melts include less than 5% by weight of at least one viscosity modifier that is not solid at room temperature. Such unusually low level of said additives, surprisingly allows to attain substantially improved levels both of high adhesiveness and cohesion. The adhesive hot-melt formulations include less than 5% by weight of a polyethylene wax or of a blend of polyethylene waxes, that characterized by a highly linear/non-branched structure and by an exceptionally low Polydispersity Index. The presence of such peculiar polyethylene waxes, that are partially incompatible with the butene-1 polymer composition, allows to use the disclosed hot-melt formulations even in the presence of fibrous or perforated substrates.

A hot melt adhesive composition that includes at least 40% by weight of a metallocene-catalyzed polybutene-1 selected from the group consisting of polybutene-1 homopolymer, polybutene-1 copolymer, and combinations thereof, the metallocene-catalyzed polybutene-1 including at least 30% by weight, based on the weight of the hot melt adhesive composition, of a metallocene-catalyzed polybutene-1 having a melt flow rate of at least 1000 grams per 10 minutes at 190° C., tackifying agent, and at least 15% by weight wax, the hot melt adhesive composition having a specific gravity of less than 0.95.

A hot melt adhesive composition that includes at least 40% by weight of a metallocene-catalyzed polybutene-1 selected from the group consisting of polybutene-1 homopolymer, polybutene-1 copolymer, and combinations thereof, the metallocene-catalyzed polybutene-1 including at least 30% by weight, based on the weight of the hot melt adhesive composition, of a metallocene-catalyzed polybutene-1 having a melt flow rate of at least 1000 grams per 10 minutes at 190° C., tackifying agent, and at least 15% by weight wax, the hot melt adhesive composition having a specific gravity of less than 0.95.

A hot melt adhesive composition that includes at least 40% by weight of a metallocene-catalyzed polybutene-1 selected from the group consisting of polybutene-1 homopolymer, polybutene-1 copolymer, and combinations thereof, the metallocene-catalyzed polybutene-1 including at least 30% by weight, based on the weight of the hot melt adhesive composition, of a metallocene-catalyzed polybutene-1 having a melt flow rate of at least 1000 grams per 10 minutes at 190° C., tackifying agent, and at least 15% by weight wax, the hot melt adhesive composition having a specific gravity of less than 0.95.

Polar silane linkers are provided that attach to resins to form silane-functionalized resins. The functionalized resins can be bound to hydroxyl groups on the surface of silica particles to improve the dispersibility of the silica particles in rubber mixtures. Further disclosed are synthetic routes to provide the silane-functionalized resins, as well as various uses and end products that benefit from the unexpected properties of the silane-functionalized resins. Silane-functionalized resins impart remarkable properties on various rubber compositions, such as tires, belts, hoses, brakes, and the like. Automobile tires incorporating the silane-functionalized resins are shown to possess excellent results in balancing the properties of rolling resistance, tire wear, and wet braking performance.

Polar silane linkers are provided that attach to resins to form silane-functionalized resins. The functionalized resins can be bound to hydroxyl groups on the surface of silica particles to improve the dispersibility of the silica particles in rubber mixtures. Further disclosed are synthetic routes to provide the silane-functionalized resins, as well as various uses and end products that benefit from the unexpected properties of the silane-functionalized resins. Silane-functionalized resins impart remarkable properties on various rubber compositions, such as tires, belts, hoses, brakes, and the like. Automobile tires incorporating the silane-functionalized resins are shown to possess excellent results in balancing the properties of rolling resistance, tire wear, and wet braking performance.

The present invention is concerned with the use of hydrotreated synthetic Fischer-Tropsch waxes in polyolefin-based hot melt adhesive compositions, wherein the hydrotreated synthetic Fischer-Tropsch waxes modify the color degradation in the polyolefin-based hot melt adhesive compositions and are characterized by a polydispersity between 1.02 and 1.06.

The present invention is concerned with the use of hydrotreated synthetic Fischer-Tropsch waxes in polyolefin-based hot melt adhesive compositions, wherein the hydrotreated synthetic Fischer-Tropsch waxes modify the color degradation in the polyolefin-based hot melt adhesive compositions and are characterized by a polydispersity between 1.02 and 1.06.

Described herein is an absorbent article. The absorbent article includes an assembly of components and an adhesive composition joining at least two of the assembly of components together. The adhesive composition includes from about 50 wt. % to about 80 wt. % of one or more copolymers and a blend of one or more heterophase copolymers. The one or more copolymers include from about 30 mole % to about 70 mole % of monomer units selected from ethylene. 1-butene, and mixtures thereof. The one or more copolymers also include from about 30 mole % to about 70 mole % of propene monomer units. The adhesive composition is free of polyisobutylene and has a viscosity of from about 2,000 mPa.Math.s to about 11,500 mPa.Math.s at 150° C.