C08L2203/10

Polyethylene Compositions and Articles With Good Barrier Properties
20220106466 · 2022-04-07 · ·

A dual reactor solution polymerization process gives polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which has a balance of barrier properties, toughness and environmental resistance. The polyethylene compositions are suitable for end use applications which may benefit from low oxygen transmission rates such as closures for bottles or barrier film.

PRE-FORMS FOR MAKING BIODEGRADABLE CONTAINERS AND RESIN THEREFOR
20220089863 · 2022-03-24 · ·

A preform for a biodegradable container wherein the preform includes from about 40 to about 99 weight percent of a polymer derived from random monomeric repeating units having a structure of

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wherein R.sup.1 is selected from the group consisting of CH.sub.3 and a C.sub.3 to C.sub.19 alkyl group, wherein the polymer comprises from about 20 to about 99 wt. % of the preform and wherein the monomeric units wherein R.sup.1═CH.sub.3 comprise 75 to 99 mol percent of the polymer and wherein the preform has a body having a uniform wall thickness throughout the body of the preform. A resin adapted for forming the preform is also disclosed.

Renewably-Sourced Biodegradable Polyolefin Packaging, Utensils, and Containers

Renewably-sourced biodegradable polyolefin packaging, utensils, and containers include a renewably-sourced polyolefin (for example, polyethylene and polypropylene) and a biodegrading agent. The renewably-sourced biodegradable polyolefin packaging is made from plant materials typically by polymerizing olefins that are made from reducing alcohols created by fermenting plant materials. An example of a suitable plant material is sugarcane and its derivatives. The biodegrading agent accelerates the biodegradation of polyolefin packaging even in anaerobic and dark (i.e., absent of ultraviolet light) environments. Such a packaging is particularly useful for packaging frozen food that is to be microwaved in the packaging. The package is also particularly usable as packaging for frozen comestibles, which are often stored at dry-ice temperatures. Ultimately, the renewably-sourced biodegradable polyolefin packaging provides a start-to-finish green packaging that meets the requirements of being renewably sourced, biodegradable in landfills, and having similar performance as traditional polyolefin packaging.

BIODEGRADABLE, CURABLE COMPOSITION AND STRUCTURE USING THE SAME
20210324253 · 2021-10-21 ·

The present disclosure provides a curable composition containing 20 to 30 wt % of boiled meat slices, 1 to 15 wt % of konjac, 30 to 50 wt % of glue, and 5 to 15 wt % of kelp, and a structure using the same.

POLYETHYLENE COMPOSITION FOR HIGH PRESSURE RESISTANT PIPES WITH IMPROVED HOMOGENEITY
20210317290 · 2021-10-14 ·

The present invention relates to a polyethylene composition comprising a base resin having a density of from 952.0 kg/m.sup.3 to 960.0 kg/m.sup.3, determined according to ISO 1183, wherein the polyethylene composition has a melt flow rate MFR.sub.21 (190° C., 21.16 kg), of from 1.0 to 7.5 g/10 min, determined according to ISO 1133, a complex viscosity at a frequency of 0.05 rad/s eta0.05 of from 750 kPa #s to 1900 kPa #s, determined according to ISO 6721-1 and ISO 6721-10, and a white spot rating of not more than 12.0, determined according to ISO 18553, a polyethylene composition obtainable by a multi-stage process, a process for producing said polyethylene composition, an article, such as a pipe or pipe fitting, comprising said polyethylene composition and the use of said polyethylene composition for the production of an article.

Multicomponent copolymer, rubber composition, crosslinked rubber composition and rubber product
11142606 · 2021-10-12 · ·

Provide is a polymer that can provide excellent toughness and weather resistance to a rubber composition and a rubber product such as a tire. The multicomponent copolymer contains a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, where a proportion of conjugated diene units bonded to a unit other than a conjugated diene unit out of the total conjugated diene units is 50% or more.

Solution polymerization process

This disclosure relates to a continuous solution polymerization process wherein production rate is increased. Process solvent, ethylene, optional comonomers, optional hydrogen and a single site catalyst formulation are injected into a first reactor forming a first ethylene interpolymer. Process solvent, ethylene, optional comonomers, optional hydrogen and a heterogeneous catalyst formulation are injected into a second reactor forming a second ethylene interpolymer. The first and second reactors may be configured in series or parallel modes of operation. Optionally, a third ethylene interpolymer is formed in an optional third reactor, wherein an optional heterogeneous catalyst formulation may be employed. In a solution phase, the first, second and optional third ethylene interpolymers are combined, the catalyst is deactivated, the solution is passivated and following a phase separation process an ethylene interpolymer product is recovered.

Polymer nanocomposite comprising poly(ethylene terephthalate) reinforced with an intercalated phyllosilicate

It is provided a phyllosilicate having a layered structure in the form of platelets and comprising an intercalating agent between the platelets, wherein the intercalating agent is a polyester of a molecular weight of 274 to 30,000 g/mol, and wherein the phyllosilicate is other than a phyllosilicate modified through ionic interchange. It is also provides a polymer nanocomposite comprising a polyethylene terephthalate (PET) polymer an the phyllosilicate mentioned above, as well as preparation processes for the preparation of the intercalated phyllosilicate and the PET nanocomposite. The PET nanocomposite is particularly useful for packaging, particularly for food and drink packaging.

Ethylene interpolymers having improved color

This disclosure relates to a continuous solution polymerization process where ethylene interpolymer products having an improved color index; for example, products having higher whiteness (Whiteness Index (WI)) and lower yellowness (Yellowness Index (YI)). Product color was improved by adjusting selected solution polymerization reaction conditions. The disclosed ethylene interpolymer products have improved color relative to comparative polyethylene compositions.

Articles with improved optical properties

Moulded articles comprising a polypropylene homopolymer with rather high melt flow rate, high stiffness, improved optical properties and an advantageous balance between stiffness and optical properties.