| Patent Number |
Title Of Patent |
Date Issued |
| 6951901 |
Method for continuous anionic polymerization of impact-resistant polystyrene |
October 4, 2005 |
| A process for preparing impact-resistant molding compositions by anionic polymerization of vinylaromatic monomers in the presence of a rubber, in a continuous-flow reactor cascade composed of at least two reactors, where the vinylaromatic monomers are fed in substreams to the reactors of |
| 6916885 |
Method for breaking a chain during anionic polymerisation |
July 12, 2005 |
| A process for the preparation of linear polymers or block copolymers of styrene by anionic polymerization comprises carrying out the chain termination with an n-alkyl glycidyl ether or a dialkyl ketone. |
| 6825271 |
Anionically polymerized, impact-resistant polystyrene with capsule particle morphology |
November 30, 2004 |
| The invention relates to an anionically polymerised, impact-resistant polystyrene with a dispersed plasticiser phase, comprising particles with capsule particle morphology and method for production thereof. |
| 6593430 |
Transparent, impact-resistant polystyrene on a styrene-butadiene block copolymer basis |
July 15, 2003 |
| Block copolymers comprise at least two hard blocks S.sub.1 and S.sub.2 made from vinylaromatic monomers and, between these, at least one random soft block B/S made from vinylaromatic monomers and from dienes, where the proportion of the hard blocks is above 40% by weight, based on the to |
| 6518379 |
Method of producing rubber compositions in styrene solutions with sterically superior chelate ca |
February 11, 2003 |
| In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as catalyst and a Lewis acid as cocatalyst and, if desired, an alkylating agent and, if desired |
| 6506846 |
Method for producing impact-resistant modified thermoplastic moulding materials |
January 14, 2003 |
| A process prepares impact-modified thermoplastic molding compositions which comprise a soft phase made from a rubber dispersed in a hard matrix composed of vinylaromatic monomers, where the hard matrix is prepared by anionic polymerization in the presence of a metal alkyl compound or a |
| 6476133 |
Method for producing a solution of diene polymers in vinyl aromatic compounds and method for pro |
November 5, 2002 |
| A process for preparing a solution of high molecular weight polymers of conjugated dienes in a vinylaromatic hydrocarbon by anionic polymerization of the diene in the presence of an alkyllithium as catalyst and a process for preparing impact-modified polymers of vinylaromatic compounds i |
| 6444767 |
Method for retarded anionic polymerization |
September 3, 2002 |
| In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl, at least one magnesium organyl and at least one aluminum organyl. The inventi |
| 6444762 |
Anionic polymerization process |
September 3, 2002 |
| A process for the continuous anionic polymerization or copolymerization of styrene or diene monomers using an alkali metal alkyl compound as polymerization initiator is carried out in the presence of an alkyl- or arylmetal compound of an element which occurs in at least divalent form as |
| 6420483 |
Preparation of impact-modified plastics |
July 16, 2002 |
| The invention relates to a process for preparing an impact-modified plastic, where particles of a crosslinked rubber are produced from a first monomer mixture which has at least 50% by weight of conjugated diene compounds, the rubber particles are added to a second monomer mixture whic |
| 6410654 |
Highly rigid, high-tenacity impact-resistant polystyrene |
June 25, 2002 |
| An anionically polymerized impact-modified polystyrene has a yield stress of at least 24 MPa, measured at 23.degree. C. to DIN 53455 and a hole impact strength of at least 11 kJ/m.sup.2, measured at 23.degree. C. to DIN 53753, measured in each case on a specimen produced to ISO 3167. A |
| 6399703 |
Method for the continuous production of thermoplastic molding materials |
June 4, 2002 |
| A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization i |
| 6388149 |
Process for reacting an organic compound in the presence of a supported ruthenium catalyst |
May 14, 2002 |
| A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, |
| 6369160 |
Polymer mixtures comprised of styrene polymers |
April 9, 2002 |
| Polymer mixtures compriseP1) from 1 to 85% by weight of an elastomeric block copolymer which has been built up from hard blocks S made from vinylaromatic monomers and from random soft blocks B/S made up from dienes and from vinylaromatic monomers, and which contains at least the block st |
| 6353056 |
Method for the production of block copolymers by retarded anionic polymerization |
March 5, 2002 |
| In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal alkoxide and at least one magnesium, aluminum or zinc organyl. |
| 6350834 |
Method for retarded anionic polymerization |
February 26, 2002 |
| In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes in the presence of at least one alkali metal compound and at least one compound of an element of group 3a of the Periodic Table of the elements, the compounds co |
| 6346572 |
Impact-resistant molding compound made of styrene polymers |
February 12, 2002 |
| A molding material as based on from 60 to 98% by weight of a hard matrix A comprising polymerized or copolymerized units of at least one vinylaromatic monomer or at least one vinylaromatic monomer and at least one polar comonomer and from 2 to 40% by weight, the percentages in each c |
| 6303721 |
Process for producing diene polymer solutions in vinyl aromatic monomers |
October 16, 2001 |
| The anionic polymerization of dienes or copolymers of dienes and vinylaromatic monomers in a vinylaromatic monomer or monomer mixture to give homopolydienes or copolymers or mixed homopolydienes and copolymers is carried out in the presence of a metal alkyl or aryl of an element havi |
| 6300441 |
Method for the production of an initiator composition for retarded anionic polymerization |
October 9, 2001 |
| Disclosed are a process for the preparation of an initiator composition comprising an alkali metal organyl and an aluminum organyl and a process for the polymerization of anionically polymerizable monomers. |
| 6262213 |
Anionic polymerization of acrylates and methacrylates |
July 17, 2001 |
| Anionic polymerization is used for the preparation of reaction mixtures comprising homopolymers, copolymers or block copolymers, and of homopolymers, copolymers and block copolymers which comprise acrylates or methacrylates or acrylates and methacrylates, wherein olefinically unsatur |
| 6248924 |
Process for reacting an organic compound in the presence of a supported ruthenium catalyst |
June 19, 2001 |
| A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, |
| 6225413 |
Thermoplastic moulding compounds |
May 1, 2001 |
| A thermoplastic molding material containingA) from 5 to 95% by weight of a vinylaromatic polymer having a syndiotactic structure andB) from 5 to 95% by weight of a copolymer of a vinylaromatic monomer and 1,1-diphenylethylene or its derivatives which may be substituted on the aromatic ri |
| 6211297 |
Process for preparing rubber-modified moulding compounds |
April 3, 2001 |
| Preparation of rubber-modified molding compositions comprisesa.sub.1) anionic polymerization of a mixture (A) comprising acrylate derivatives or methacrylate derivatives or acrylate derivatives and methacrylate derivatives and a solvent, if desired comprising olefinically unsaturated com |
| 6197889 |
Thermoplastic elastomeric block copolymers |
March 6, 2001 |
| Elastomeric block copolymers comprising at least one hard block A composed of styrene monomers and at least one elastomeric block (B/A) composed of styrene monomers and dienes, the glass transition temperature T.sub.g of the block A being more than 25.degree. C. and that of block (B/A) b |
| 6162866 |
Thermoplastic molding compositions based on star polymers with thermoplastic elastomers and poly |
December 19, 2000 |
| Thermoplastic molding compositions comprise: |
| 6143847 |
Method for preparing (co) polymers by metal-free anionic polymerization in the presence of a pho |
November 7, 2000 |
| The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aroma |
| 6031053 |
Thermoplastic elastomer |
February 29, 2000 |
| An elastomeric block copolymer comprising at least one block A having polymerized units of a vinylaromatic monomer and forming a rigid phase and at least one elastomeric block B/A having polymerized units of both vinylaromatic monomers and of a diene and forming a flexible phase, and |
| 5990236 |
Preparation of impact-resistant polystyrene |
November 23, 1999 |
| Abstract of the disclosure: A process is described for the continuous preparation of an impact-resistant molding material by anionic polymerization of styrene or another aromatic vinyl compound or mixtures thereof in the presence of a solvent and a block rubber, wherein the polymeriz |
| 5939595 |
Preparation of diarylethanes |
August 17, 1999 |
| A process for preparing diarylethanes of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each hydrogen or C.sub.1 -C.sub.8 -alkyl, by reacting aromatic compounds of the general formula II ##STR2## where R.sup.2, R.sup.3, R.sup. |
| 5910553 |
Preparation of rubber-modified molding materials by means of groups which are incorporated in th |
June 8, 1999 |
| In the preparation of a rubber-modified molding material, in a first stage, a first mixture (A) contains at least one alkyl acrylate or methacrylate (a) of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2 is alkyl of 1 to 32 carbon atoms, at least one firs |
| 5902865 |
Preparation of polystyrene by continuous anionic polymerization |
May 11, 1999 |
| In a process for preparing polystyrene by continuous anionic polymerization of styrene monomer by means of a catalyst based on a metal alkyl preferably in the presence of a solvent at a temperature in the range from 30 to 70.degree. C., the styrene monomer is fed to an essentially is |
| 5886105 |
Preparation of rubber-modified molding materials from reaction mixtures containing derivatives o |
March 23, 1999 |
| In the preparation of a rubber-modified molding material, in a first stage, a first mixture (A) contains at least one alkyl acrylate or methacrylate (a) of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2 is alkyl of 1 to 32 carbon atoms, a compound (b) of |
| 5880166 |
Expandable styrene polymers |
March 9, 1999 |
| Expandable, rubber-modified styrene polymers for elastic polystyrene foams comprisea) a continuous phase comprising polystyrene or a styrene copolymer containing at most 50% of copolymerized comonomers andb) from 5 to 30% by weight of a butadiene-styrene block copolymer dispersed therein |
| 5854353 |
Thermoplastic molding compound |
December 29, 1998 |
| Thermoplastic molding compounds comprise as essential componentsA) from 10 to 100% by weight of copolymers of the monomers of the general formulae I and II ##STR1## where R.sub.1 is H or alkyl of 1-22 carbon atoms,R.sub.2 is H or alkyl of 1-22 carbon atoms,R.sub.3 is H or alkyl of 1-4 ca |
| 5817266 |
Dewatering of water-moist graft rubber |
October 6, 1998 |
| Essentially dry materials are obtained by mechanically dewatering water-moist rubber, prepared by emulsion polymerization and precipitation, to give a compact material having a rubber content of at least 50%, by a process in which the previously dewatered rubber is fed to the feed se |
| 5795938 |
Preparation of toughened polystyrene molding materials |
August 18, 1998 |
| Toughened vinyl aromatic compounds, in particular high impact polystyrene, are prepared by a continuous process in which the vinyl aromatic compound and the impact modifier, an elastomeric block copolymer, are each prepared separately in a reaction zone by anionic polymerization, with or |
| 5717040 |
Continuous process for polymerizing anionically polymerizable vinyl compounds |
February 10, 1998 |
| Anionically (co)polymerizable vinyl or diene compounds are polymerized in solution and in a reaction zone in the form of a flow tube, using an organometallic initiator, by a continuous process in which the reaction takes place essentially without heat exchange with the environment, the |
| 5700876 |
Thermoplastic molding material |
December 23, 1997 |
| In a process for preparing a thermoplastic molding material comprising from 80 to 50% by weight of a hard matrix of an anionically polymerized aromatic vinyl compound and from 20 to 50% by weight of a soft phase uniformly distributed in the hard matrix, the percentages being based in |
| 5587423 |
Preparation of block copolymers by ionic polymerization |
December 24, 1996 |
| In a process for preparing block copolymers of styrene or its equivalents on the one hand and of butadiene or its equivalents on the other hand by sequential anionic polymerization, in which a first monomer and the organometallic compound serving as initiator are first of all combined to |
| 5391655 |
Preparation of an aromatic vinyl compound |
February 21, 1995 |
| A process is described for preparing styrene polymers by continuous anionic polymerization, the monomer or monomers and the organometallic compound serving as starter (initiator) being added in solution to a tubular reactor operating essentially without backmixing and being left in the |
| 5250611 |
Preparation of ABS molding materials |
October 5, 1993 |
| Impact-resistant polystyrene acrylonitrile (ABS) is prepared by free radical polymernation of monomeric styrene and acrylonitrile or equivalents thereof in the presence of preformed, dissolved polbutadiene as a grafting base, the solvents used being in particular ethylbenzene and, at |
| 5036130 |
Transparent thermoplastic molding material, its preparation and its use |
July 30, 1991 |
| A transparent thermoplastic molding material contains, based on A+B,A: from 5 to 95% by weight of polystyrene andB; from 95 to 5% by weight of a nonelastomeric star block copolymer which is composed of, based on B, b.sub.1 from 60 to 95% by weight of styrene and b.sub.2 from 5 to 40% by weig |
| 5019626 |
Thermoplastic molding materials based on polyphenylene ethers and nylons |
May 28, 1991 |
| Thermoplastic molding materials contain, as essential components,A) 5-92% by weight of a polyphenylene ether which can contain up to 50% by weight of a styrene polymer which differs from C),B) 5-92% by weight of a nylon,C) 3-50% by weight of a copolymer composed of C.sub.1) 97-99.9% by weight |
| 4990564 |
Thermoplastic molding materials |
February 5, 1991 |
| Thermoplastic molding materials containing, as essential components,(A) 5-95% by weight of a partially aromatic copolyamide essentially composed of(A.sub.1) 20-90% by weight of units derived from terephthalic acid and hexamethylenediamine(A.sub.2) 0-50% by weight of units derived from .epsil |
| 4943399 |
Continuous preparation of molding materials based on polyphenylene ethers and nylons |
July 24, 1990 |
| Thermoplastic molding materials based on polyphenylene ethers and nylons are prepared in an extruder by a continuous process in which a modified polyphenylene ether is prepared in a first zone of the extruder and is then mixed with nylons and, if required, further additives in one or mor |
| 4880875 |
Thermoplastic molding material based on polycarbonate, ASA and vinylaromatics/an-containing copo |
November 14, 1989 |
| A thermoplastic molding material containing, based on components A, B and C,A from 10 to 90% by weight of one or more polycarbonates,B from 10 to 50% by weight of one or more graft copolymers,C from 10 to 50% by weight of one or more thermoplastic copolymers containing a vinylaromatic monome |
| 4866114 |
Self-extinguishing, thermoplastic polyphenylene ether/polyamide molding materials and their use |
September 12, 1989 |
| Self-extinguishing, thermoplastic polyphenylene ether/polyamide molding materials contain, as essential components,(A) from 10 to 90% by weight of component (A), which consists of(A.sub.1) from 70 to 99% by weight of a modified polyphenylene ether,(A.sub.2) from 1 to 30% by weight of a compound |
| 4797453 |
Graft polymers of polyphenylene ethers |
January 10, 1989 |
| Graft polymers of(A) a polyphenylene ether as a base polymer and(B) a half ester of an unsaturated dicarboxylic acid of the general formula ##STR1## as a graft monomer, where R.sup.1 is C.sub.1 -C.sub.25 -alkyl, C.sub.2 -C.sub.25 -alkylene or aryl, R.sup.2 and R.sup.3 are each H, Br, Cl |
| 4696996 |
Preparation of polyphenylene ethers, and an apparatus for this purpose |
September 29, 1987 |
| Polyphenylene ethers are prepared from monohydric phenols, which possess alkyl substituents in the two ortho-positions and, if desired, in the meta-position, but not in the para-position, by an oxidative coupling reaction with oxygen at from 15.degree. to 50.degree. C. and under from 1 |
| 4647621 |
Thermoplastic molding material |
March 3, 1987 |
| A thermoplastic molding material comprises copolymers I and II.Copolymer I is a high-impact (graft) copolymer which is derived from a monovinyl-aromatic monomer and a polymer or copolymer predominantly containing polymerized 1,3-diene units, and is present in a proportion of 0.1-1.0% by |
