The invention relates to a copolymer of ethylene and of a 1,3-diene of formula CH.sub.2═CR—CH═CH.sub.2, which copolymer bears a silanol or alkoxysilane function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

The invention relates to a copolymer of ethylene and of a 1,3-diene of formula CH.sub.2═CR—CH═CH.sub.2, which copolymer bears a silanol or alkoxysilane function, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a copolymer improves the compromise between the content of ethylene in the polymer, its crystallinity and the stiffness of a rubber composition containing it.

The present invention relates to a composition comprising a multistage polymer and a (meth)acrylic polymer in form of a porous polymer powder, its process of preparation and its use. The present invention also relates to a composition in form of a porous polymer powder comprising a multistage polymer in form of polymeric particles made by a multistage process and a (meth)acrylic polymer, while the (meth)acrylic polymer possesses a medium molecular weight. The present invention further relates to polymer composition in form of a porous polymer powder comprising polymeric particles made by a multistage process comprising at least two stages and a (meth)acrylic polymer, its process of preparation, its use and compositions and articles comprising it.

The object of the invention is to provide a novel olefin-based molded product useful for various applications. An olefin-based molded product comprising a polymer including a structural unit of at least one polar olefin monomer represented by the general formula (I) CH.sub.2═CH—R.sup.2—Z(R.sup.1).sub.n is provided. In the formula, Z is a hetero atom selected from the group consisting of nitrogen, oxygen, phosphorus, sulfur, and selenium; R.sup.1 is a substituted or unsubstituted hydrocarbyl group having 1 to 30 carbon atoms; n is an integer of 1 or 2 depending on the atomic species of Z; and R.sup.2 is a substituted or unsubstituted hydrocarbylene group having 2 to 20 carbon atoms.

The object of the invention is to provide a novel olefin-based molded product useful for various applications. An olefin-based molded product comprising a polymer including a structural unit of at least one polar olefin monomer represented by the general formula (I) CH.sub.2═CH—R.sup.2—Z(R.sup.1).sub.n is provided. In the formula, Z is a hetero atom selected from the group consisting of nitrogen, oxygen, phosphorus, sulfur, and selenium; R.sup.1 is a substituted or unsubstituted hydrocarbyl group having 1 to 30 carbon atoms; n is an integer of 1 or 2 depending on the atomic species of Z; and R.sup.2 is a substituted or unsubstituted hydrocarbylene group having 2 to 20 carbon atoms.

A resin particle dispersion containing core/shell-type resin particles and water is described. A shell portion resin of the core/shell-type resin particles contains a constitutional unit derived from a (meth)acrylic acid ester containing a hydrocarbon group having from 4 to 8 carbon atoms. A core portion resin of the core/shell-type resin particles contains a constitutional unit derived from a (meth)acrylamide-based monomer whose solubility parameter lies within the range of from 17.0 to 21.0 (J/cm.sup.3).sup.0.5 in an amount of not less than 5% by mass, and a glass transition temperature of the core portion resin is not higher than 50° C. An acid value of the core/shell-type resin particles is from 50 to 100 mgKOH/g. A process for producing the resin particle dispersion and a printing method using the resin particle dispersion is also described.

The present invention relates to an olefin-based polymer satisfying requirements: (1) a melt index (MI, 190° C., 2.16 kg load conditions) ranging from 1.0 to 10.0 g/10 min; (2) a density (d) ranging from 0.875 to 0.895 g/cc; (3) 0.5 J/g≤dH(100)≤3.0 J/g and 1.0 J/g≤dH(90)≤6.0 J/g as measured by successive self-nucleation/annealing (SSA) using a differential scanning calorimeter (DSC); (4) 15≤T(90)−T(50)≤30 and 50° C.≤T(50)≤75° C. as measured by SSA using a DSC; and (5) a melting point (Tm) of 55° C.≤Tm≤80° C. as measured using a DSC. The olefin-based polymer according to the present invention is a low-density olefin-based polymer and has a highly crystalline region introduced therein, thereby exhibiting high mechanical stiffness.

The present invention relates to an olefin-based polymer satisfying requirements: (1) a melt index (MI, 190° C., 2.16 kg load conditions) ranging from 1.0 to 10.0 g/10 min; (2) a density (d) ranging from 0.875 to 0.895 g/cc; (3) 0.5 J/g≤dH(100)≤3.0 J/g and 1.0 J/g≤dH(90)≤6.0 J/g as measured by successive self-nucleation/annealing (SSA) using a differential scanning calorimeter (DSC); (4) 15≤T(90)−T(50)≤30 and 50° C.≤T(50)≤75° C. as measured by SSA using a DSC; and (5) a melting point (Tm) of 55° C.≤Tm≤80° C. as measured using a DSC. The olefin-based polymer according to the present invention is a low-density olefin-based polymer and has a highly crystalline region introduced therein, thereby exhibiting high mechanical stiffness.

A process to prepare an alpha composition comprising a first ethylene/alpha-olefin/interpolymer fraction and a second ethylene/alpha-olefin/interpolymer fraction; said process comprising polymerizing, in one reactor, a reaction mixture, comprising ethylene and an alpha-olefin, a biphenyl phenol metal complex selected from Structure 1, as described herein, and a biphenyl phenol metal complex selected from Structure 2, as described herein; and alpha compositions prepared therefrom.

A process to prepare an alpha composition comprising a first ethylene/alpha-olefin/interpolymer fraction and a second ethylene/alpha-olefin/interpolymer fraction; said process comprising polymerizing, in one reactor, a reaction mixture, comprising ethylene and an alpha-olefin, a biphenyl phenol metal complex selected from Structure 1, as described herein, and a biphenyl phenol metal complex selected from Structure 2, as described herein; and alpha compositions prepared therefrom.