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WO/1999/001490A1 |
The invention relates to methods for producing polymers by coupling living polymer blocks, formed from an anionic polymerization initiator and anionically polymerizable monomers, with glycidyl ether of aliphatic alcohols as coupling agents.
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WO/1999/001483A1 |
The invention relates to a method for producing homopolymers, copolymers or block copolymers by anionic polymerization of acrylates and/or methacrylates in the presence of an initiator composition containing A) an alkali organic compound...
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WO/1998/059002A1 |
A heterophasic polypropylene copolymer having a tensile modulus of 420 MPa or less comprising: i) a semi-crystalline propylene:ethylene: and optionally other $g(a)-olefin polymer matrix; ii) an elastomeric propylene:ethylene and optional...
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WO/1998/058971A1 |
A process for producing terpolymers of propylene, comprising: a) feeding into a slurry reactor a reaction mixture containing 50-85 wt.% of propylene, 1-10 wt.% of ethylene, 15-40 wt.% of another C¿4?-C¿8? alpha-olefin, a catalyst syste...
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WO/1998/058975A1 |
Described herein is a process and an apparatus for preparing propylene homopolymers and copolymers, which comprises polymerizing propylene optionally with comonomers in the presence of a catalyst at elevated temperature and pressure in a...
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WO/1998/058978A1 |
A viscosity modifier comprising a low molecular weight block copolymer including A blocks and B blocks, wherein the A blocks comprise at least about 93 wt.% polyethylene and the B blocks comprise a copolymer of between about 40 wt.% to 7...
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WO/1998/058976A1 |
Described herein is a process for preparing propylene copolymers. The process comprises the steps of polymerizing propylene with comonomers in at least one slurry reactor and at least one gas phase reactor, at least 10 % of the polymer p...
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WO/1998/058977A1 |
Described herein is a process and an apparatus for polymerizing propylene. The process comprises carrying out the polymerization in at least one slurry reactor and at least one gas phase reactor without recycling unreacted monomers to th...
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WO/1998/055519A1 |
A continuous process for obtaining propylene polymers in the presence of a catalytic system of the Ziegler-Natta type containing a catalytic solid comprising chlorine, magnesium and titanium atoms and at least one internal donor, a cocat...
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WO/1998/055516A1 |
A process for making hydrogenated conjugated diene polymers is presented, comprising the steps of: polymerizing of one or more conjugated dienes in the presence of a lithium initiator in a polymerization zone; optionally introducing a te...
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WO/1998/054258A1 |
A polypropylene resin composition is disclosed which comprises (a) 50-80 % by weight of a specific polypropylene/ethylene-propylene copolymer composition, (b) 5-40 % by weight of a specific ethylene/$g(a)-olefin copolymer rubber, (c) 1-1...
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WO/1998/054232A1 |
A process for the preparation of polyolefins having a bi- or multimodal molecular weight distribution which comprises: (i) contacting olefin monomer and a first co-reactant with a catalyst system in a first reaction zone under first poly...
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WO/1998/046651A2 |
Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or th...
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WO/1998/046678A1 |
The invention relates to a molding material comprising 45 to 95 wt. % styrene and 1.1-diphenylethylene copolymer(S/DPE copolymer) with 37 to 85 wt. % polymerized styrene units and 15 to 63 wt. % polymerized 1.1-diphenylethylene units or ...
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WO/1998/045342A1 |
The invention relates to the production of homopolymers, co-copolymers or block copolymers from cycloolefinic monomer units characterized in that polymerization occurs in the presence of a catalyst of general formula (I), and optionally ...
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WO/1998/045368A1 |
The invention provides an olefin (co-)polymer composition having a high melt tension, high crystallization temperature and high rigidity. A method of producing the composition comprises: preparing a preactivated catalyst by forming a sma...
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WO/1998/036001A1 |
A method of forming a branched polymer includes forming a plurality of growing linear polymer chains by polymerizing a monomer which is protected against branching and which forms a reactive end group which is in a first condition which ...
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WO/1998/034970A1 |
The invention relates to a thermoplastic elastomer composition comprising a branched olefin copolymer derived from olfinically unsaturated monomers capable of insertion polymerization having A) a T�g? as measured by DSC less than or eq...
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WO/1998/034971A1 |
A polyolefin product is provided which comprises a branched olefin copolymer having an isotactic polypropylene backbone, polyethylene branches and, optionally, one or more comonomers. The total comonomer content of the branched olefin co...
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WO/1998/034985A1 |
The invention is a polyethylene composition having a polydispersity index of less than or equal to 3, an average branching index (g') as measured by GPC/Vis$m(G)0.9, and a melt strength (MS) (centipoise, 190 �C) that satisfies the rela...
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WO/1998/034965A1 |
Polymeric compositions of matter are described comprising olefin polymer chains having M�n? of about 400 to 75,000, a ratio of vinyl groups to total olefin groups according to formula (1), where a = -0.24 and b = 0.8, and where the tot...
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WO/1998/034986A1 |
The invention is directed to essentially saturated hydrocarbon polymer composition comprising essentially saturated hydrocarbon polymers having A) a backbone chain; B) a plurality of essentially hydrocarbyl sidechains connected to A), sa...
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WO/1998/031690A1 |
An organic compound (i) containing an alkali metal or alkaline earth metal is reacted with a compound (ii) containing a leaving group and either silicon or germanium in the presence of a nitrogenous heterocyclic aromatic compound (iii), ...
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WO/1998/031746A1 |
The invention concerns a mixture of a copolymer (A) comprising between 50 and 99 mol % polymerized-in styrene units and between 1 and 50 mol % polymerized-in units of 1,1-diphenylethylene and/or a block copolymer comprising at least one ...
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WO/1998/030634A1 |
The present invention relates to bituminous compositions used for roofing and waterproofing membranes or material comprising asymmetrical coupled polyvinyl aromatic-polydiene block copolymers having improved physical properties over broa...
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WO/1998/025980A1 |
The invention concerns a process for preparing rubber-modified moulding compounds, characterized in that: a�1?) a mixture (A) comprising acrylate or methacrylate derivatives or acrylate and methacrylate derivatives and a solvent, optio...
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WO/1998/025977A1 |
Random or block copolymers of a (meth)acrylic ester, which comprise structural units represented by general formulae (I) and (II) and have a number-average molecular weight of 1,000 to 50,000, a weight-average molecular weight (M�w?) t...
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WO/1998/025975A2 |
A process is disclosed for producing reaction mixtures including homopolymers, copolymers or block copolymers, and for producing homopolymers, copolymers and block copolymers containing acrylates and/or methacrylates. The process is char...
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WO/1998/023651A1 |
The invention relates to the production of homoplymers, copolymers or block copolymers by anionic polymerization of acrylates and/or methacrylates in the presence of an initiator composition containing A) an alkaline organic compound, B)...
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WO/1998/020069A1 |
Thermoplastic polyolefin blends having improved resistance to fluids such as petroleum fuels after being painted with flexible coatings such as polyurethanes paints and the like are disclosed. These blends include a crystalline or semi-c...
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WO/1998/018840A1 |
An aromatic vinyl/isoprene block copolymer comprising 5 to 50 wt. % of a branch component represented by the general formula: (A-B)�n?X (wherein A is an aromatic vinyl polymer block; B is an isoprene polymer block; and X is a residue o...
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WO/1998/017696A1 |
The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have been hydrogenated and functionalized. The dispersant substances include compositions including a copolymer...
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WO/1998/015584A1 |
Glycidyl methacrylate - alkylene (pref. butadiene) - glycidyl methacrylate triblock copolymers of potentially interesting reactive character. These epoxy-modified methacrylate triblocks may be useful for making oil-extended gels and poss...
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WO/1998/014323A1 |
A metal/synthetic resin laminate comprising a metal substrate layer, an epoxy resin-based adhesive layer (a first adhesive layer), an adhesive layer (a second adhesive layer) comprising an epoxidized styrenic thermoplastic elastomer D pr...
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WO/1998/013392A1 |
The invention pertains to a process for pseudo-living radical polymerization's in which use is made of specific NO-compounds, called initers, according to formula (I) or (II) wherein: R represents a group which has at least one carbon at...
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WO/1998/013443A1 |
A dispersant viscosity index improver linear diblock copolymer or radial or star block copolymer, wherein the linear diblock copolymer and each arm of the radial or star block copolymer, respectively, has an overall number average molecu...
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WO/1998/012240A1 |
Thermoplastic elastomer moulding compounds based on a rubber elastic block copolymer are obtained by hydrogenating a styrene-butadiene block copolymer composed of at least one block A that forms a hard phase and contains polymerised styr...
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WO/1998/012256A1 |
Thermoplastic moulding compounds contain: (A) 30 to 98 wt % of a graft polymer which consists of (ak) 30 to 90 wt % of a cross-linked acrylic rubber graft nucleus; (as) 10 to 70 wt % of a graft shell made of (as/1) 50 to 100 wt % of a st...
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WO/1998/011143A1 |
The invention concerns a process for preparing polymers, characterized in that polymerization is carried out in the presence of radicals of general formula (I), in which Q means NR?2� or S and T means CR?4�R?5� or S, and R?1�, R?...
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WO/1998/010016A1 |
This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in oriented film applications. Specifically, this invention relates to crystalline propylene polymer composi...
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WO/1998/008881A1 |
Star polymers are obtained by polymerising vinyl aromatic monomers with a branching monomer component which contains at least two vinyl aromatic functional radicals in the presence of a catalyst obtained from (A) a transition metal compl...
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WO/1998/007766A1 |
A process is disclosed for anionically polymerising dienes or for copolymerising dienes and vinyl aromatic monomers in a vinyl aromatic monomer or monomer mixture into homopolydienes or copolymers or mixed homopolydienes and copolymers i...
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WO/1998/007765A2 |
A continuous anionic polymerisation or copolymerisation process of styrene or diene monomers with alkali metal alkyl as polymerisation initiator is carried out in the presence of a metal alkyl or aryl of an at least bivalent element as r...
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WO/1998/005691A1 |
The synthesis and characterization of novel linear polymers and multi-arm star polymers comprising polyisobutylene arms connected to a well-defined calixarene core are described. The synthesis has been achieved using the 'core first' met...
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WO/1998/004605A1 |
Modified polymers containing a poly(2-hydroxyethyl (meth)acrylate) chain as the hydrophilic polymer segment in which a hydrophobic polymer chain or a lipid residue of a sterol is bound to either end of the poly(2-hydroxyethyl (meth)acryl...
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WO/1998/003559A1 |
Certain olefins such as ethylene, $g(a)-olefins and cyclopentene can be polymerized by using catalyst system containing a nickel or palladium $g(a)-diimine complex, a metal containing hydrocarbylation compound, and a selected Lewis acid,...
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WO/1998/002469A1 |
Metallocene catalysts useful for the preparation of syndiotactic/atactic block polyolefins have the general formula: R'(C�4?R'�m?C�5?C�4?R'�n?) XMeQ wherein X is a hetero-atom ligand with one or two lone pair electrons selected...
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WO/1998/002471A1 |
A process for polymerizing ethylene, $g(a)-olefin and optionally diene monomers is disclosed. The process comprises the steps of contacting: (1) ethylene, (2) at least one C�3?-C�20? aliphatic $g(a)-olefin, (3) optionally, at least o...
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WO/1998/001480A1 |
The present invention is directed to a process of atom (or group) transfer radical polymerization for the synthesis of novel homopolymer or a block or graft copolymer, optionally containing at lest one polar group, with well defined mole...
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WO/1997/049743A1 |
A block copolymer (1) comprising a block of a conjugated diene polymer and a block of a random copolymer of a conjugated diene with an aromatic vinyl, (2) having a weight ratio of the polymer block A to the copolymer B of (5 : 95) to (95...
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