36 results about "Branched chain alkene" patented technology

The invention relates to olefin branched macromonomers, olefin graft copolymers and olefin resin compositions having the advantage of good compatibility with polyolefin resins and good moldability and workability. The olefin branched macromonomer satisfies the following (a) and (b):[0001](a) its weight-average molecular weight (Mw) measured through gel permeation chromatography (GPC) falls between 400 and 200000;[0002](b) its vinyl content is at least 70 mol % of all the unsaturated groups in the macromonomer.

A branched olefin copolymer demonstrating excellent performance in various uses, comprising a building block (A) represented by formula (1) below and a building block (B) represented by formula (2) below, obtained by e.g. a method which involves sequentially conducting ( step 1) a step of synthesizing -group-containing olefin copolymer (Q) containing at least one functional group (G) selected from a hydroxyl group, a carboxylic acid group, an ester group, an amino group, an epoxy group, a silanol group and an acid anhydride group, (step 2) a step of converting the functional group (G) into a group having an ability to initiate radical polymerization, and (Step 3) a step of installing a polymer segment (Z) by radical polymerization of a monomer essentially comprising a carbon-carbon double bond-containing compound (R) containing at least one selected from an oxygen atom, a nitrogen atom, a halogen atom and an aryl group; wherein the formula (1), R<1 >represents a hydrogen atom and a C1-18 linear or branched aliphatic hydrocarbon group; in the formula (2), R<2 >represents a C1-18 linear or branched aliphatic or aromatic hydrocarbon group; F represents a heteroatom or a heteroatom-containing linking group; Z represents a polymer segment containing at least one selected from an oxygen atom, a nitrogen atom, a halogen atom and an aryl group and having a molecular-weight distribution of 1.0 to 3.0; W represents a group selected from an alcoholic hydroxyl group, a phenolic hydroxyl group, a carboxylic acid group, a carboxylate group, an acid anhydride group, an amino group, an epoxy group, a siloxy group and a mercapto group; n is an integer of 1 to 3 and m is 0, 1 or 2 provided that when n is 2 or 3, Z may be the same or different to each other, and when m is 2, W may be the same or different to each other; and W may be bound to the same or different atom of R<1 >to form a cyclic structure.

The invention discloses a method for preparing a polyethylene catalyst. The method comprises the following steps that 1, in the presence of inert gas nitrogen, organic oxide and an alkoxy magnesium compound are subjected to a haptoreaction to form a homogeneous system; 2, a granular metallocene compound is added into the homogeneous system, stirring is carried out, and uniform slurry is formed; 3, the slurry is spray-dried, and microsphere particles are obtained; 4, the microsphere particles and a titanium active component are subjected to a haptoreaction, and the solid catalyst is obtained. Ethylene is adopted as a unique monomer, different active components in the catalyst act at the same time, and the polyethylene product with a high branch degree is prepared. It is avoided that when a branched polyethylene product is produced, expensive short-branch alpha olefin is used, and the product production cost is reduced. The problems that in the prior art, multiple compounded catalysts are complex in preparation process, and matching performance is hard to achieve are solved.

Liquid crystal mixtures comprising one or more compounds of formula (I), wherein R 1 is H or a straight chain or branched chain alkyl group of 1 to 20 carbon atoms or a straight chain or branched chain alkenyl group of 2 to 20 carbon atoms, wherein in both cases, optionally one -CH 2 -group replaced by cyclohexa-1,4-diyl, or 1 or 2 -CH 2 -group, if not adjacent to nitrogen (N), optionally replaced by -O-, or by -C(=O)-, -Si(CH 3 ) 2 - replace; and / or one or more H on the alkyl or alkenyl is optionally replaced by F or CH 3 alternative, R 2 Represents a) H or F; b) straight-chain or branched-chain alkyl of 1 to 20 carbon atoms or straight-chain or branched alkenyl of 2 to 20 carbon atoms, wherein in both cases, 1 or 2 -CH 2 - optionally replaced by -O-, -C(=O)O-, -Si(CH 3 ) 2 - Replacement, and / or one or more H on the alkyl or alkenyl group is replaced by F or CH 3 Replacement; c) group (a), wherein independently of the meanings of formula (I), R 3 , R 4 , R 5 , R 6 independently of each other is an alkyl group of 1-8 carbon atoms, M 1 , M 2 Each independently represents a single bond, -OC(=O), -C(=O)O-, -OCH 2 -, -NH-, A is a) a straight-chain or branched alkane-α, ω-diyl group of 1 to 20 carbon atoms or a straight-chain or branched alkene-α, ω of 2 to 20 carbon atoms - Diyl group, if not with M 1 / 2 Adjacent, optional 1 or 2 non-adjacent -CH 2 -may be replaced by -O-; b) a group -C(=Y)-, wherein Y is CH-Z, and Z is benzene-1,4-diyl optionally substituted by 1 to 3 halogen atoms, An alkyl or alkoxy group of 1 to 4 carbon atoms, with the proviso that M 1 and M 2 is -C(=O)O- and -OC(=O)-; c) the group -CHY, wherein Y is CH 2 -Z, and Z is benzene-1,4-diyl optionally substituted by 1 to 3 halogen atoms, an alkyl or alkoxy group of 1 to 4 carbon atoms, with the proviso that M 1 and M 2 Be -C(=O)O- and -OC(=O)-; d) group (b), wherein p, q are 0, 1 or 2, p+q≥1; M 3 is a single bond or -OC(=O)-, -C(=O)O-, -OCH 2 -, -CH 2 O-, -C≡C-, -CH 2 CH 2 -, -CH 2 CH 2 CH 2 CH 2 -, groups (c) and (d) independently of each other are benzene-1,4-diyl optionally substituted by 1, 2 or 3 F, or optionally substituted by 1 CN, CH 3 Or cyclohexa-1,4-diyl substituted by F, or pyrimidine-2,5-diyl optionally substituted by 1 F, pyridine-2,5-diyl optionally substituted by 1 F , or naphthalene-2,6-diyl optionally substituted by 1, 2 or 3 Fs, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl (the aromatic ring is optionally substituted by 1, 2 or 3 F), or decalin-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, Or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)-thiadiazole-2,5-diyl, or (1, 3) Thiazole-2,5-diyl, or (1,3) thiazole-2,4-diyl, or thiophene-2,4-diyl, or thiophene-2,5-diyl, or (1, 3) Dioxane-2,5-diyl, or piperidine-1,4-diyl, or piperazine-1,4-diyl; X is H, OH, a straight chain of 1 to 20 carbon atoms Or branched chain alkyl or alkoxy, of which 1 or 2 -CH 2 - can be replaced by -O-, -C(=O)O-, -Si(CH 3 ) 2 - Replacement, optionally one or more hydrogens are replaced by F or CH 3 Substitution; m is 0 or 1, X and M 1 -(A) m -M 2 -R 2 Together they can constitute a) a 4-16-membered ring optionally substituted by an alkyl group of 1-15 carbon atoms, b) a combination of two directly connected or spiro-connected 4-16-membered rings independently connected to each other, optionally substituted by Alkyl substitution of 1 to 15 carbon atoms, regardless of which of the three cases, the rings can be independently of each other carbocycles or carbocycles containing boron, nitrogen, oxygen or sulfur heteroatoms.