COMPOSITION INCLUDING SILANE-GRAFTED POLYOLEFIN
A silane-grafted polyolefin composition is disclosed, and includes a desired reduced specific weight material. The composition finds application in a wide array of uses, and in particular automotive and uses such as weatherstrips, where this composition is used in place of conventional materials such as TPV and EPDM rubber formulations.
1 . A composition for the formation of an extruded and/or molded article the composition comprising:
a silane-grafted polyolefin component having a density of from about 0.84 g/cm 3 to about 0.96 g/cm 3 ; and
one or more additives selected from the group consisting of polypropylenes, thermoplastic vulcanizates (TPV), olefinic block copolymers, ethylene propylene diene terpolymers (EPDM), ethylene vinyl acetate (EVA) copolymers, ethylene n-butyl acrylate copolymers, and ethylene methacrylate copolymers;
wherein the polyolefin is selected from the group consisting of a blend of propylene/α-olefin copolymer with an ethylene/α-olefin copolymer, and a propylene/α-olefin copolymer.
2 . The composition of claim 1 wherein the composition is in the form of extruded pellets or extruded pillows.
3 . The composition of claim 1 , further comprising one or more fillers selected from the group consisting of antistatic agents, dyes, pigments, UV light absorbers, nucleating agents, fillers, slip agents, plasticizers, fire retardants, lubricants, processing aides, smoke inhibitors, anti-blocking agents, and viscosity control agents.
4 . The composition of claim 1 , wherein the article is selected from molded details, molded corners, convertible top seals, glass encapsulations, greenhouse moldings, occupation detector system sensor switches, outer and inner belts, auxiliary seals, below-belt bracket and channels, automotive hoses, anti-vibration system (AVS) components including mounts, dampers, bushings, strut mounts, and isolators; coatings for brake lines, coatings for fuel lines, coatings for transmission oil cooler lines, coatings for brackets, coatings for cross members, coatings for frame components, coatings for body panels and components, coatings for suspension components, coatings for wheels, coatings for hubs, coatings for springs, coatings for fasteners, air deflectors, spoilers, fascia, trim, building seals, window seals, door seals, boots, bellows, grommets, gaskets, wire and cable sheathing, tires, windshield wipers, squeegees, floor mats, pedal covers, automotive belts, conveyor belts, shoe components, marine bumpers, O-rings, valves, springs, and combinations thereof.
5 . An extruded and/or molded article comprising:
a silane-crosslinked polyolefin component having a density of from about 0.84 g/cm 3 to about 0.96 g/cm 3 ; and
one or more additive components selected from the group consisting of polypropylenes, thermoplastic vulcanizates (TPV), olefinic block copolymers, ethylene propylene diene terpolymers (EPDM), ethylene vinyl acetate (EVA) copolymers, ethylene n-butyl acrylate copolymers, and ethylene methacrylate copolymers;
wherein the polyolefin is selected from the group consisting of a blend of propylene/α-olefin copolymer with an ethylene/α-olefin copolymer, and a propylene/α-olefin copolymer.
6 . The article of claim 5 , wherein the article is selected from molded details, molded corners, convertible top seals, glass encapsulations, greenhouse moldings, occupation detector system sensor switches, outer and inner belts, auxiliary seals, below-belt bracket and channels, automotive hoses, anti-vibration system (AVS) components including mounts, dampers, bushings, strut mounts, and isolators; coatings for brake lines, coatings for fuel lines, coatings for transmission oil cooler lines, coatings for brackets, coatings for cross members, coatings for frame components, coatings for body panels and components, coatings for suspension components, coatings for wheels, coatings for hubs, coatings for springs, coatings for fasteners, air deflectors, spoilers, fascia, trim, building seals, window seals, door seals, boots, bellows, grommets, gaskets, wire and cable sheathing, tires, windshield wipers, squeegees, floor mats, pedal covers, automotive belts, conveyor belts, shoe components, marine bumpers, O-rings, valves, springs, and combinations thereof.
7 . A method for manufacturing an extruded and molded article comprising:
grafting silanes to a polyolefin to form a silane-grafted polyolefin having a density of from about 0.84 g/cm 3 to about 0.96 g/cm 3 ;
extruding a composition comprising the silane-grafted polyolefin, a condensation catalyst, and optionally one or more additives selected from the group consisting of polypropylenes, thermoplastic vulcanizates (TPV), ethylene propylene diene terpolymers (EPDM), ethylene vinyl acetate (EVA) copolymers, ethylene n-butyl acrylate copolymers, olefin block copolymers, and ethylene methacrylate copolymers; and
molding the extruded composition into the article;
wherein the polyolefin is selected from a propylene/α-olefin copolymer, or a blend of propylene/α-olefin copolymer with an ethylene/α-olefin copolymer.
8 . The method of claim 7 , wherein the grafting is performed in a melt, in solution, in a solid state, or in a swollen state.
9 . The method of claim 7 , wherein the composition further comprises one or more fillers selected from the group consisting of antistatic agents, dyes, pigments, UV light absorbers, nucleating agents, fillers, slip agents, plasticizers, fire retardants, lubricants, processing aides, smoke inhibitors, anti-blocking agents, and viscosity control agents.
10 . The method of claim 7 , wherein the article is selected from molded details, molded corners, convertible top seals, glass encapsulations, greenhouse moldings, occupation detector system sensor switches, outer and inner belts, auxiliary seals, below-belt bracket and channels, automotive hoses, anti-vibration system (AVS) components including mounts, dampers, bushings, strut mounts, and isolators; coatings for brake lines, coatings for fuel lines, coatings for transmission oil cooler lines, coatings for brackets, coatings for cross members, coatings for frame components, coatings for body panels and components, coatings for suspension components, coatings for wheels, coatings for hubs, coatings for springs, coatings for fasteners, air deflectors, spoilers, fascia, trim, building seals, window seals, door seals, boots, bellows, grommets, gaskets, wire and cable sheathing, tires, windshield wipers, squeegees, floor mats, pedal covers, automotive belts, conveyor belts, shoe components, marine bumpers, O-rings, valves, springs, and combinations thereof.
11 . A composition for the formation of an extruded and/or molded article comprising a silane-grafted polyolefin having a density of from about 0.84 g/cm 3 to about 0.96 g/cm 3 wherein the polyolefin is a blend of propylene/α-olefin copolymer and an ethylene/α-olefin copolymer.
12 . The composition of claim 11 , further comprising one or more additives selected from the group consisting of polypropylenes, thermoplastic vulcanizates (TPV), ethylene propylene diene terpolymers (EPDM), ethylene vinylacetate (EVA) copolymers, ethylene n-butyl acrylate copolymers, olefin block copolymers and ethylene methacrylate copolymers.
13 . The composition of claim 11 , further comprising one or more fillers selected from the group consisting of antistatic agents, dyes, pigments, UV light absorbers, nucleating agents, fillers, slip agents, plasticizers, fire retardants, lubricants, processing aides, smoke inhibitors, anti-blocking agents, viscosity control agents, metal oxides, metal hydroxides, metal carbonates, metal sulfates, metal silicates, clays, talcs, carbon black, and silicas
14 . The composition of claim 11 wherein the one or more fillers are present in an amount from about 1 wt % to about 20 wt % of the composition.
15 . The composition of claim 11 further comprising one or more tackifying resins selected from the group consisting of aliphatic hydrocarbons, aromatic hydrocarbons, modified hydrocarbons, terpenes, modified terpenes, hydrogenated terpenes, rosins, hydrogenated rosins, and combinations thereof.
16 . The composition of claim 11 , wherein the article is selected from molded details, molded corners, convertible top seals, glass encapsulations, greenhouse moldings, occupation detector system sensor switches, outer and inner belts, auxiliary seals, below-belt bracket and channels, automotive hoses, anti-vibration system (AVS) components including mounts, dampers, bushings, strut mounts, and isolators; coatings for brake lines, coatings for fuel lines, coatings for transmission oil cooler lines, coatings for brackets, coatings for cross members, coatings for frame components, coatings for body panels and components, coatings for suspension components, coatings for wheels, coatings for hubs, coatings for springs, coatings for fasteners, air deflectors, spoilers, fascia, trim, building seals, window seals, door seals, boots, bellows, grommets, gaskets, wire and cable sheathing, tires, windshield wipers, squeegees, floor mats, pedal covers, automotive belts, conveyor belts, shoe components, marine bumpers, O-rings, valves, springs, and combinations thereof.