Exxonmobil Chemical Patents Inc.

Luis A Sotomayor

Bin Zhao

George James Pehlert

Ryan Winston Impelman

William Michael Ferry

Jennifer J Austin

Eugene R Uhl

Caol P Huff

Diwaker Singh

Giriprasath Gururajan

Michael D Lucas

Corrine L Brandl

Chen Wan

Gregory E Keys

Lauren P Bram

Rui Hoong Chong

Keng-Hua Beh

Anne Bernard-Brunel

Alexandra K Valdez

Disclosed are compositions comprising at least one polyolefin, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 10 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is less than the phenyl phosphite. Also disclosed herein are compositions comprising at least one polypropylene, a neutralizer, a hindered phenol, and a phenyl phosphite; wherein the overall concentration of the hindered phenol and phenyl phosphite is within a range from 1000 ppm to 5000 ppm in the polyolefin, and wherein the amount of the hindered phenol is from 200 to 2000 ppm less than the phenyl phosphite.

Low odor and volatiles polyolefin compositions and methods of production

Gas phase polymerization processes include contacting an input stream comprising a monomer and an induced condensing agent in the presence of an inert gas with a catalyst in a fluidized bed reactor to produce a polymer, unreacted monomer, and an output gas; recycling a recycle stream of the unreacted monomer from the reactor to the input stream; venting at least a portion of the output gas from the reactor; and maintaining a partial pressure of the inert gas in the reactor above a reference inert gas pressure to decrease losses of the recycle stream with the vented output gas. The processes may include controlling the inert gas partial pressure to vary the total reactor pressure up to the maximum safe pressure, without causing carry-over of product polymer.

Optimized inert gas partial pressure in a gas phase polymerization process

A process for producing a nonwoven fabric comprising forming a polymer composition comprising a primary polypropylene and at least one secondary polyolefin; in a spunbond process, forming fibers then fabric from the polymer composition; and exposing the fabric to an heating environment within a range from 50&#xb0; C. to 250&#xb0; C.

Process for producing a non-woven fabric

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Houston, TX, United States of America

Luis A Sotomayor