A process for preparing an olefin polymer, including the steps of forming a particulate olefin polymer in a gas-phase polymerization reactor in the presence of a C.sub.3-C.sub.5 alkane as polymerization diluent, separating discharged polyolefin particles from concomitantly discharged gas at a pressure from 1 to 2.2 MPa, degassing the polyolefin particles at a pressure from 0.1 to 0.4 MPa with a gas made from or containing a C.sub.3-C.sub.5 alkane; and transferring the separated gas and the gas from the degassing to a work-up unit operated at a pressure from 0.001 to 0.2 MPa below the pressure of the separation, wherein the gas for degassing is continuously received from the work-up unit.

The present disclosure provides base stocks and processes for producing such basestocks by polymerizing internal olefins. The present disclosure further provides base stocks, comprising low molecular weight polyolefin products, having one or more of improved flow, low temperature properties, and thickening efficiency. The present disclosure further provides polyolefin products useful as base stocks and or diesel fuel. In at least one embodiment, a process includes introducing a feedstream comprising C.sub.4-C.sub.30 internal-olefins with a catalyst system comprising a nickel diimine catalyst optionally in the presence of a solvent. The method includes obtaining a C.sub.6-C.sub.100 polyolefin product having one or more of a carbon fraction of epsilon-carbons of from about 0.08 to about 0.3, as determined by .sup.13C NMR spectroscopy, based on the total carbon content of the polyolefin product.

The present disclosure provides base stocks and processes for producing such basestocks by polymerizing internal olefins. The present disclosure further provides base stocks, comprising low molecular weight polyolefin products, having one or more of improved flow, low temperature properties, and thickening efficiency. The present disclosure further provides polyolefin products useful as base stocks and or diesel fuel. In at least one embodiment, a process includes introducing a feedstream comprising C.sub.4-C.sub.30 internal-olefins with a catalyst system comprising a nickel diimine catalyst optionally in the presence of a solvent. The method includes obtaining a C.sub.6-C.sub.100 polyolefin product having one or more of a carbon fraction of epsilon-carbons of from about 0.08 to about 0.3, as determined by .sup.13C NMR spectroscopy, based on the total carbon content of the polyolefin product.

A binder includes a copolymer including a building block (I) and a building block (II)

##STR00001##

The building block (I) is formed by copolymerizing a building block (i)

##STR00002##

and a building block (ii)

##STR00003##

A binder includes a copolymer including a building block (I) and a building block (II)

##STR00001##

The building block (I) is formed by copolymerizing a building block (i)

##STR00002##

and a building block (ii)

##STR00003##

A non-fluorinated copolymer composition containing (1) a fluorine-free copolymer and (2) acetylene alcohol. The non-fluorinated copolymer (1) has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; and a repeating unit formed from (c) an acrylic monomer having an olefinic carbon-carbon double bond and an ion donating group. Also disclosed is an oil-resistant agent containing a fluorine-free composition including (1) a fluorine-free copolymer, and (2) an acetylene alcohol, wherein the fluorine-free copolymer (1) has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; an oil-resistant agent kit; a method for producing the fluorine-free copolymer; an oil-resistant paper; and a method for eliminating foam during treatment of paper with the fluorine-free copolymer composition.

A non-fluorinated copolymer composition containing (1) a fluorine-free copolymer and (2) acetylene alcohol. The non-fluorinated copolymer (1) has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; and a repeating unit formed from (c) an acrylic monomer having an olefinic carbon-carbon double bond and an ion donating group. Also disclosed is an oil-resistant agent containing a fluorine-free composition including (1) a fluorine-free copolymer, and (2) an acetylene alcohol, wherein the fluorine-free copolymer (1) has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; an oil-resistant agent kit; a method for producing the fluorine-free copolymer; an oil-resistant paper; and a method for eliminating foam during treatment of paper with the fluorine-free copolymer composition.

Provided are a method of purifying an alpha-olefin and a composition for purifying an alpha-olefin therefor. More specifically, a method of purifying an alpha-olefin having an excellent effect of removing impurities in the alpha-olefin and a composition for purifying an alpha-olefin therefor are provided.

Provided are a method of purifying an alpha-olefin and a composition for purifying an alpha-olefin therefor. More specifically, a method of purifying an alpha-olefin having an excellent effect of removing impurities in the alpha-olefin and a composition for purifying an alpha-olefin therefor are provided.

The invention relates to a process for the preparation of a multimodal polyolefin polymer in a first polymerization reactor and a second polymerization reactor connected in series, wherein a first polyolefin polymer is prepared in the first polymerization reactor in suspension in the presence of hydrogen and a second polyolefin polymer is prepared in the second polymerization reactor in the presence of a lower concentration of hydrogen than in the first polymerization reactor, the process comprising: a) withdrawing a suspension of solid polyolefin particles in a suspension medium from the first polymerization reactor, wherein the suspension medium comprises hydrogen and a hydrocarbon mixture having an initial boiling point of at least 50° C. and a final boiling point of at most 120° C.; b) feeding the suspension to a flash drum having a pressure controlled by a vacuum pump, wherein the pressure of the flash drum is less than 0.1 MPa; c) vaporizing a part of the suspension medium in the flash drum to obtain a hydrogen-depleted suspension and d) withdrawing the hydrogen-depleted suspension from the flash drum and feeding it to the second polymerization reactor.