Patents Assigned to Roehm GmbH Chemische Fabrik
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Patent number: 5530080Abstract: The invention relates to a polymerization process for the production of polymethacrylate molding compounds having high heat deflection temperature and high stability against thermal degradation, are prepared by polymerizing methacrylate monomer in a reaction medium such that at least 70 wt. % of the polymethacrylate molding compound is produced at a monomer concentration in the reaction medium of at least 5 mol per liter.Type: GrantFiled: December 1, 1994Date of Patent: June 25, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Werner Siol, Michael Wicker, Klaus Koralewski, Ulrich Terbrack
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Patent number: 5527576Abstract: This invention relates to plastic containers hermetically sealed with a peelably heat-sealable plastic film comprised of a polymeric mixture comprised of 1-99 parts by weight (pbw) of an impact-resistant polystyrene resin and 99-1 pbw of a copolymer consisting essentially of:p1) 20-90 weight % methyl methacrylate, ethyl methacrylate or a mixture thereof;p2) 10-80 weight % of at least one monomer of formula (I): ##STR1## and where R.sub.1 represents an alkyl group with 3-24 C atoms; andp3) 0-10 weight %, preferably 1-8 weight %, of a monomer which is copolymerizable with and different from the monomers (p1) and (p2).Type: GrantFiled: November 1, 1994Date of Patent: June 18, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Jurgen Maul, Werner Siol, Ulrich Terbrack
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Patent number: 5523354Abstract: Crosslinked polymers are prepared by reacting mutually reactive side groups, comprising reacting polymer chains containing carbonyl side groups, optionally protected, and 1,2- or 1,3-diol side groups, optionally protected, in the presence of an acid catalyst, thereby forming crosslinking bridges between polymer chains. Crosslinked polymers are also prepared in which polymer chains are bonded together by a low molecular weight crosslinking agent.Type: GrantFiled: July 20, 1994Date of Patent: June 4, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Marita Kaufmann, Volker Kerscher, Werner Siol, Karl J. Folsch
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Patent number: 5492944Abstract: A powdery bonding agent for paints which is soluble in pure aliphatic compounds, and which is in the form of powdery polymerizate particles, which consists of, at least on the particle surface, of a copolymerizate formed of: (i) 60 to 95 percent by weight of units of at least one hardening monomer selected from the group consisting of (A) isobutylmethacrylate and (B) cycloalkylmethacrylate; and (ii) 5 to 40 percent by weight of units of at least one aliphatic-substance-solubilizing monomer selected from the group consisting of (C) alkylmethacrylates having 6 to 18 carbon atoms in the alkyl residue, where the units of isobutylmethacrylate account for no more than 60 percent by weight and the units of cycloalkylmethacrylates account for no less than 10 percent by weight, based on, in each case, the weight of the copolymerizate.Type: GrantFiled: November 25, 1994Date of Patent: February 20, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Wilhelm Elser, Karl J. Folsch, Peter Rossberg, Dieter Tessmer, Michael Wicke
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Patent number: 5489451Abstract: The invention relates to reversibly crosslinked, orientable liquid crystalline (LC) polymer films, comprised ofan LC poly(meth)acrylate PP and/ora mixture of PP with low molecular weight crosslinking components. The inventive films have numerous applications, e.g. for optical information storage, and for surface coatings, laminates, or bonded systems having special anisotropic properties.Type: GrantFiled: November 30, 1992Date of Patent: February 6, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Jurgen Omeis, Joachim Knebel, Karlheniz Goll
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Patent number: 5488128Abstract: The invention relates to a thio(meth)acrylic acid bisester of formula I ##STR1## where R.sub.1 represents hydrogen or methyl;r represents the number 0 or 1; ands, m, and n independently represent an integer from 2 to 6, with the proviso thatwhen r=0, s+n>4; andwhen r=1, s+m+n>6 useful as or monomer for high refractive index plastics.Type: GrantFiled: October 12, 1993Date of Patent: January 30, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Martina Bader, Volker Kerscher
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Patent number: 5483003Abstract: Thermoplastically processible elastomers based on acrylates, which contain 40-100 wt. % of one or more comb polymers having a molecular weight greater than 50,000 Dalton, comprised of:(A) 5-50 wt. % of macromonomers comprised of methyl methacrylate or copolymers of methyl methacrylate with comonomers chosen from other (meth)acrylic acid esters and styrenes;containing a terminal unit with a radically polymerizable group and having a glass transition temperature (Tg) of at least 60.degree. C., a molecular weight in the range 500-100,000 Dalton, and an index of refraction in the range n.sub.D =1.48-1.50;(B) 5-90 wt. %, based on the total weight of the comb polymer, of monomers or monomer mixtures of formula I: ##STR1## where R.sub.1 is a C.sub.1 -C.sub.12 -alkyl group; and (C) 5-50 wt. % based on the total weight of the comb polymer, of a phenyl group-containing radically polymerizable monomer.Type: GrantFiled: March 18, 1994Date of Patent: January 9, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Werner Siol, Klaus Koralewski
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Patent number: 5480934Abstract: An aqueous, low-viscosity, water-soluble polymeric dispersion containing a polymer (A) is prepared by copolymerizing monomers:(a1) 99 to 70 weight % of at least one water-soluble monomer,(a2) 1 to 30 weight % of at least one hydrophobic monomer and,(a3) 0 to 20 weight % of at least one amphiphilic monomer, which monomers constitute 100 weight % of the polymers forming material which polymer (A) has an average molecular weight M.sub.W (mean weight) of at least 5.times.10.sup.5 Dalton, said process comprising:a first step i) of reacting said monomer ingredients in an aqueous dispersion in the presence of at least one polymeric dispersing agent (D) thereby preparing a dispersion of polymer (A); and a second step ii) of adding at least one polymeric dispersion agent (D), in an aqueous solution, to the dispersion.Type: GrantFiled: May 12, 1994Date of Patent: January 2, 1996Assignee: Roehm GmbH Chemische FabrikInventors: Bernfried Messner, Carl Joachim, Gunter Schmitt, Manfred Braum, Peter Quis
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Patent number: 5473019Abstract: The invention relates to a method of manufacturing monodisperse poly(meth)acrylates by the method of precipitation polymerization, comprising polymerizingi) a monomer mixture comprising at least 60 wt. % of monomer of formula I ##STR1## where R represents hydrogen or methyl; and R.sub.1 represents a C.sub.1-8 alkyl group, a C.sub.6-24 aryl group, a C.sub.1-8 alkyl substituted aryl group or an aralkyl group;ii) 0.1-10 wt. % based on the weight of the monomer mixture of a block copolymer having polystyrene components; andiii) 0.02-2 wt. % based on the weight of the monomer mixture of a percarbonic acid ester;in a halogen free solvent comprising 70 to 100 wt. % of cyclohexane.Type: GrantFiled: March 29, 1995Date of Patent: December 5, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Werner Siol, Wilhelm Wopker, Erwin Felger, Markus Parusel
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Patent number: 5468800Abstract: Aqueous binders for liquid coating agents which contain a film-forming, aqueous plastic dispersion and a crosslinking component can be stored in ready-to-use form and quickly harden after being processed into a coating, at room temperature or a temperature just slightly above, forming a hard, dry, crosslinkable film. The plastic dispersion is an emulsion polymer with polymerized units of an ethylenically-unsaturated, radically polymerizable monomer with an alkylene urea side group. The crosslinking agent contains at least two, possibly protected, aldehyde groups.Type: GrantFiled: February 3, 1994Date of Patent: November 21, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Karl J. Folsch, Marita Kaufmann, Jurgen Hartmann
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Patent number: 5464898Abstract: A cast resin suspensions comprising:(A) 40 to 80% by weight of an inorganic filler,(B) 60 to 20% by weight of a liquid polymerizable organic monomer, and(C) 0 to 5 parts by weight based on the sum of (A) and (B) of a polymerizable organosilicon component as coupling agent,wherein inorganic filler (A) is a mixture of at least two filler particle fractions having different median particle sizes, wherein the size ratio of the average particle sizes of the large and small filler particles ranges from 10:1 to 2:1 and wherein the weight ratio of the contents of large and small filler particles is from 4:1 to 1:4.Type: GrantFiled: September 19, 1994Date of Patent: November 7, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Guenther Ittmann, Manfred Krieg
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Patent number: 5458975Abstract: The invention relates to a method of manufacturing monodisperse poly(meth)acrylates by the method of precipitation polymerization, comprising polymerizingi) a monomer mixture comprising at least 60 wt. % of monomer of formula I ##STR1## where R represents hydrogen or methyl; andR.sub.1 represents a C.sub.1-8 alkyl group, a C.sub.6-24 aryl group, a C.sub.1-8 alkyl substituted aryl group or an aralkyl group;ii) 0.1-10 wt. % based on the weight of the monomer mixture of a block copolymer having polystyrene components; andiii) 0.02-2 wt. % based on the weight of the monomer mixture of a percarbonic acid ester;in a halogen free solvent comprising 70 to 100 wt. % of cyclohexane.Type: GrantFiled: December 1, 1994Date of Patent: October 17, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Werner Siol, Wilhelm Wopker, Erwin Felger, Markus Parusel
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Patent number: 5451650Abstract: The invention relates to a method of manufacturing monodisperse poly(meth)acrylates by the method of precipitation polymerization, comprising polymerizingi) a monomer mixture comprising at least 60 wt. % of monomer of formula I ##STR1## where R represents hydrogen or methyl; andR.sub.1 represents a C.sub.1-8 alkyl group, a C.sub.6-24 aryl group, a C.sub.1-8 alkyl substituted aryl group or an aralkyl group;ii) 0.1-10 wt. % based on the weight of the monomer mixture of a block copolymer having polystyrene components; andiii) 0.02-2 wt. % based on the weight of the monomer mixture of a percarbonic acid ester;in a halogen free solvent comprising 70 to 100 wt. % of cyclohexane.Type: GrantFiled: August 10, 1994Date of Patent: September 19, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Werner Siol, Wilhelm Wopker, Erwin Felger, Markus Parusel
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Patent number: 5430104Abstract: Polymer mixtures made from two different polymer components and exhibiting LCST behavior are provided for use in applications which require temperature-dependent light permeability. The polymer mixtures P are made from:P1: from 98 to 2% by weight of poly-.alpha.-methylstyrene (PAMs); andP2: from 2 to 98% by weight of polyvinyl methyl ether (PVMe).Type: GrantFiled: February 14, 1994Date of Patent: July 4, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Werner Siol, Ulrich Terbrack
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Patent number: 5424472Abstract: The invention relates to a method of producing (meth)acryloylthio esters of general formula I ##STR1## where R represents hydrogen or methyl, and R.sup.1 represents a phenyl group, a substituted phenyl group, a C.sub.1-24 alkyl group, a substituted C.sub.1-24 alkyl group, a cyclic C.sub.3-24 alkyl group;comprising reacting (meth)acrylic acid anhydride (formula II) ##STR2## where R represents hydrogen or methyl, with at least the stoichiometric amount with a thiol or thiolate of formula IIIR.sub.1 --S--M, (III)where M represents hydrogen or a metal cation, andR.sub.1 is defined as above.Type: GrantFiled: October 12, 1993Date of Patent: June 13, 1995Assignee: Roehm GmbH Chemische Fabrik PatentabteilungInventors: Martina Bader, Patrik Hartmann, Gerhard Schwinn
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Patent number: 5422422Abstract: The invention relates to a high refractive index plastic produced by reaction of an alkylthiol with a multiply unsaturated monomer, wherein said alkylthiol (A) has at least 2, and up to 20 carbon atoms in the alkyl group, and contains at least 2 thiol groups in the molecule, is reacted with an alkylpolythiol ester (B) having at least 2, and up to 24, preferably up to 12, carbon atoms in the alkyl group, which ester contains at least 2 thiol groups esterified with (meth)acrylic acid in the molecule, said reaction being under conditions of radical polymerization, with the limitation that the numerical ratio of the mercapto groups to the available double bonds is .ltoreq.1, preferably <0.5.Type: GrantFiled: October 12, 1993Date of Patent: June 6, 1995Assignee: Roehm GmbH Chemische Fabrik PatentabteilungInventors: Martina Bader, Volker Kerscher
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Patent number: 5418304Abstract: The invention relates to a coating composition, a method of coating molded articles with the coating composition, and the molded articles so coated, particularly molded articles comprised of thermoplastic or thermoelastic plastics. The coating, in the form of a cured thin layer, is particularly optically clear, scratch-resistant, and weather-resistant. It is produced on the plastic substrate material by polymerization of a layer of flowable coating comprised of the coating material, which layer contains polyfunctional (meth)acrylic monomers, and said layer further contains, as a "leveling" agent, fluoroalkyl (meth)acrylates of formula I ##STR1## where R.sub.1 represents H or CH.sub.3, and R.sub.2 represents a fluorine-containing alkyl group with 2-20 C atoms.Type: GrantFiled: June 9, 1994Date of Patent: May 23, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Michael Mueller, Rolf Neeb
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Patent number: 5403883Abstract: The invention relates to aqueous dispersions of water soluble polymers, formed by polymerization of a mixture A of various monomer components (a1, a2, and possibly a3) in the presence of a polymeric dispersant D; wherewith the mixture A is comprised of the following different monomera1 (in the amount of 99-70 wt. %), comprised of at least one water soluble monomer,a2 (in the amount of 1-30 wt. %), comprised of at least one hydrophobic monomer, and (possibly)a3 (in the amount of 0-20 wt. %), comprised of at least one amphipathic monomer, wherewith in each instance the sum of the amounts of a1, a2, and a3 is 100%;and wherewith the water soluble polymers have a mean molecular weight M.sub.w (gravimetric mean) of at least 10.sup.6 Dalton.Type: GrantFiled: May 13, 1993Date of Patent: April 4, 1995Assignee: Roehm Gmbh Chemische FabrikInventors: Bernfried Messner, Peter Quis, Guenter Schmitt, Gabriele Silva, Manfred Braum
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Patent number: 5399744Abstract: The subject invention pertains to a method of manufacturing isobornyl acrylate or isobornyl methacrylate by reacting camphene with acrylic acid or methacrylic acid, respectively, in the presence of a molybdenum heteropolyacid as a catalyst.Type: GrantFiled: May 13, 1994Date of Patent: March 21, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Martina Pfirmann, Joachim Knebel
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Patent number: 5387634Abstract: Opaque tinted acrylic glass produced with organic pigments or with organic dyes, which in addition to the colorant, also contains an acid in the polymer matrix, exhibits improved resistance to weathering.Type: GrantFiled: January 15, 1993Date of Patent: February 7, 1995Assignee: Roehm GmbH Chemische FabrikInventors: Hans Lichtenstein, Silvia Ebert, Manfred Krieg