摘要:
An adhesive composition comprising a copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and C4-20α-olefins, the copolymer having (i) a content of units derived from propylene of greater than about 50 mole percent, (ii) a Brookfield viscosity at 190 C from about 50 to about 100,000 cP, (iii) an MWD from about 1.5 to about 15, and (iv) containing less than about 50 ppm residual catalyst metal.
摘要:
An adhesive composition comprising a copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and C4-20α-olefins, the copolymer having (i) a content of units derived from propylene of greater than about 50 mole percent, (ii) a Brookfield viscosity at 190 C from about 50 to about 100,000 cP, (iii) an MWD from about 1.5 to about 15, and (iv) containing less than about 50 ppm residual catalyst metal.
摘要:
The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least on comonomer selected from the group consisting of C3-C20 α-olefins, dienes, and cycloalkenes, wherein the interpolymer is characterized as having a high degree of processability, good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.
摘要:
The invention is an article comprising at least two layers, a low crystallinity layer and a high crystallinity layer. One or both layers is capable of being elongated so that a pre-stretched article is capable of being formed.
摘要:
The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films. In molding applications, the mixture is well-suited as freezer-to-microwave food storage containers and lids which maintain good flexibility at low temperature to allow easy openability of such containers.
摘要:
The invention includes an interlayer film and composition comprising a polymer composition obtainable from (a) at least one low crystallinity propylene polymer, and at least one (b) internal adhesion enhancer, (c) at least one clarity enhancer or (d), more preferably, both (b) and (c). The invention also includes a process of preparing a film comprising (a) supplying at least one first component, a low crystallinity propylene polymer, (b) supplying at least one second component, selected from at least one an internal adhesion enhancer, at least one clarity enhancer or a combination thereof; and, (d) admixing the first and second components and optional additives. Additionally, the invention includes a process of making a laminate comprising steps of (a) positioning at least one layer of the interlayer film directly adjacent to at least one layer of substrate (b) applying sufficient heat or other energy to result in softening of the interlayer directly adjacent the substrate with simultaneous application of sufficient pressure to press polymer into intimate contact with substrate. The invention also includes laminates and articles comprising the composition or film of the invention or a combination thereof.
摘要:
This invention relates to fabricated articles, including films or sheets prepared from blends of substantially random ethylene/propylene/vinyl aromatic monomer interpolymers with propylene homopolymers or copolymers. The fabricated articles exhibit high toughness, tensile properties and heat resistance and low stress whitening, and further can exhibit desirable optical properties, especially when in the form of a film or sheet.
摘要:
The subject invention provides a film having at least one layer comprising an interpolymer of ethylene and at least one comonomer selected from the group consisting of C3-C20 &agr;-olefins, dienes, and cycloalkenes, wherein the interpolymer is characteried as having a high degree of processability good optical performance, and good mechanical properties. The subject invention further provides film fabrication processes and polymer compositions which are useful in preparing the subject films.
摘要:
The subject invention provides a thermoset elastomer comprising a crosslinked pseudorandom or substantially random interpolymer of: (a) from 15 to 70 weight percent of at least one .alpha.-olefin, (b) from 30 to 70 weight percent of at least one vinylidene aromatic compound, and (c) from 0 to 15 weight percent of at least one diene. The subject invention further provides a thermoplastic vulcanizate comprising the thermoset elastomers of the invention as provided in a thermoplastic polyolefin matrix. The subject invention further provides processes for preparing the inventive thermoset elastomers and thermoplastic vulcanizates, as well as parts fabricated therefrom. The inventive materials have a superior balance of properties, as compared to EPM and EPDM based materials. The subject invention also pertains to foams and methods for their preparation.
摘要:
The invention is an article comprising at least two layers, a low crystallinity layer and a high crystallinity layer. One or both layers is capable of being elongated so that a pre-stretched article is capable of being formed.