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| Number | Title | Issue Date |
| 6821530 | Polymer composite compositions The invention relates to methods of treating mixtures containing polymeric materials, e.g., collagen, to form a polymer that intercalates into the polymeric material. The treatment provides greater tensile strength to the mixture, among other advantages. The polymer... | 11/23/2004 |
| 6756475 | Preparation of polyoxymethylenes Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polyme... | 06/29/2004 |
| 6565960 | Polymer composite compositions The invention relates to methods of treating mixtures containing polymeric materials, e.g., collagen, to form a polymer that intercalates into the polymeric material. The treatment provides greater tensile strength to the mixture, among other advantages. ... | 05/20/2003 |
| 6506838 | Modified oxymethylene polymers Modified oxymethylene polymers comprising a linear polymer of oxymethylene repeat units, blocked at one end by at least one terminal group selected from the group consisting of an alkylene oxide as an adduct to alcohol and an alkylene oxide as an adduct t... | 01/14/2003 |
| 6447859 | Polyester resin and molded article The polyester resin of the present invention is produced by polymerizing a monomer mixture comprising a glycol component containing 5 to 60 mol % of a spiroglycol represented by Formula I: ##STR1## and 30 to 95 mol % of ethylene glycol, and a dicarboxylic... | 09/10/2002 |
| 6060571 | Acrolein-releasing copolymers Acrolein polymer from acrolein and one or more polyhydric alcohols, characterized by release of monomeric acrolein in aqueous systems and hence by a prolonged effect on microorganisms, is prepared by adding acrolein to a reaction medium containing catalys... | 05/09/2000 |
| 5948709 | Oil resistant polyamide based adhesive Oil resistant adhesive compositions and nonwoven articles comprising an adhesive prepared from polymeric dimer fatty acid polyamide resins which are especially suited for use in the elastic attachment of disposable nonwoven products and particularly for l... | 09/07/1999 |
| 5847027 | Hardeners for elastic epoxy resin systems Hardeners for elastic epoxy resin systems, obtained by reaction of (A) reaction products of epoxide compounds (A1) with sterically hindered amines (A3), and/or (B) cyclic carbonates prepared from the compounds (A) and carbon dioxide, and/or (C) cyclic carbonat... | 12/08/1998 |
| 5837755 | Biodegradable thermosetting urea-resin compositions A urea-resin composition comprising a urea-formaldehyde reaction product, cellulose material, and at least one substance selected from the group cosisting of -amino acid, powdered collagen and gelatin. The present invention provides urea-resin comp... | 11/17/1998 |
| 5811511 | Method for stabilizing unstable terminals of an oxymethylene copolymer Disclosed is a method for stabilizing unstable terminals of a crude oxymethylene copolymer, wherein use is made of an extruder comprising a casing having a supply inlet and an extrusion outlet which casing has at least two rotation shafts extending longit... | 09/22/1998 |
| 5756594 | Polymers containing polyacetal blocks, their preparation and their use Polymers which contain polyacetal blocks are obtainable by polymerizing carboxylates containing aldehyde groups in the presence of initiators and reacting the polymers with at least bifunctional crosslinking agents in the presence of acids or Lewis acids ... | 05/26/1998 |
| 5744571 | Production of particular polyesters using a novel catalyst system This invention relates to a process of producing a moldable polyethylene terephthalate or modified polyethylene terephthalate having an inherent viscosity greater than 0.6 dL/g comprising reacting the diacid component with the diol component such that a c... | 04/28/1998 |
| 5728798 | Process for preparing polyacetal copolymer In preparing a polyacetal copolymer through copolymerization of trioxane as the principal monomer with a cyclic ether or cyclic formal having at least one carbon-carbon bond as the comonomer, 0.05 to 100 ppm (on the weight basis), based on the total amoun... | 03/17/1998 |
| 5710240 | Condensates of butyne-linked hindered amines The invention relates to compounds of the formula I ##STR1## in which n is a number in the range from 1 to 100; X is --R7 --, --CO--, --CO--CO--, --CO--R2 --CO--, --CO--NH--R5 --NH--CO--, --CO--O--R6 --O--C... | 01/20/1998 |
| 5608030 | Process for the preparation of polyacetals Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as... | 03/04/1997 |
| 5500477 | Polyacetal molding materials having high impact resistance, a process for their preparation, and their use A moulding composition based on linear polyoxymethylene copolymers and customary additives with a melt index MFI (2,16 kg, 190° C.) of ࣘ0,8, preferably ࣘ0,5 and especially ࣘ0,2 g/10 min has an extraordinary high toughness, which eliminates an addit... | 03/19/1996 |
| 5430073 | Process for preparing polymers and mouling compounds based thereon The invention relates to a process for preparing a polymer in which in situ polymerization of monomers takes place in the presence of a catalyst, in which the monomers are obtained by in situ activation of precursor monomers. According to the invention a ... | 07/04/1995 |
| 5142022 | Thermosetting resin compositions comprising an unsaturated spirodilactam Novel thermosetting resin compositions are disclosed which comprise a 2,7-dioxo-1,6-dioxaspiro[4.4]nona-3,8-diene compound and at least one other reactive, polymerizable monomer which has at least two functional group substituents which contain active hyd... | 08/25/1992 |
| 4977021 | Methods for forming magnetic coatings using trioxane recording media having such coatings Methods for forming magnetic coatings on a nonmagnetic substrate include the application of a liquid film layer onto the substrate, the film layer being a dispersion of magnetic particles in a liquid resin binder solution which contains trioxane. The trio... | 12/11/1990 |
| 4968771 | Wood adhesives modified with surface active agents The present invention provides an improved adhesive composition for wood gluing, comprising a formaldehyde condensation resin and a minor amount of a surface active agent. This invention further provides a method for manufacture of composite wood products... | 11/06/1990 |
| 4956445 | Process for the preparation of acetal polymer or copolymer Acetal polymer having a high degree of polymerization is obtained using a catalyst of a heteropoly acid or an acid salt thereof in a small amount. The catalyst is represented by formula: Hx [Mm .multidot.M'n Ol ]yH | 09/11/1990 |
| 4954607 | Ferromagnetic organic substance having triaryl methane structure and process for manufacturing the same A ferromagnetic organic substance having a triaryl methane structure and a free radical concentration of methine carbon positions of at least 1017 radicals/g, preferably at least 1018 radials/g, is provided by polycondensing a conden... | 09/04/1990 |
| 4946930 | Biaxially oriented polyoxymethylene film There is disclosed a biaxially oriented film formed of film forming composition comprising a polyoxymethylene polymer in which the major constituent of the main chains of said polymer each of consists substantially of repeating units of oxymethylene group... | 08/07/1990 |
| 4937312 | Process for producing elastomeric acetal polymers There are provided new elastomeric copolymers of about 15 to 45 mol %, preferably about 25 to 35 mol % trioxane, about 55 to 85 mol %, preferably about 65 to 75 mol % of 1,3-dioxolane, said mol percents based on the total of trioxane and 1,3-dioxolane, an... | 06/26/1990 |
| 4931535 | Process for the preparation of acetal polymer or copolymer Acetal polymer and copolymer are prepared by polymerizing formaldehyde or its cyclic oligomer as a principal monomer, or copolymerizing the principal monomer with a comonomer copolymerizable therewith, using an isopoly acid or an acid salt thereof as a po... | 06/05/1990 |
| 4898925 | Elastomeric acetal polymers There are provided new elastomeric copolymers of about 15 to 45 mol %, preferably about 25 to 35 mol % trioxane, about 55 to 85 mol %, preferably about 65 to 75 mol % of 1,3-dioxolane, said mol percents based on the total of trioxane and 1,3-dioxolane, an... | 02/06/1990 |
| 4879085 | Method of manufacturing polyacetal resin film A polyacetal resin is manufactured by an improvement whereby a polyacetal resin having a melt index (MI) of 0.3~5.0 is formed into film by an inflation process within an extrusion resin temperature range according to the following equation: ##EQU1##... | 11/07/1989 |
| 4835245 | Biaxially oriented polyoxymethylene film The present invention provides a biaxially oriented film of a polyoxymethylene polymer having the main part of each of the main chains thereof substantially composed of repeating units of the oxymethylene group, --CH2 --O--, which biaxially ori... | 05/30/1989 |
| 4814424 | Method of stabilizing polyoxymethylene copolymer An improved method of stabilizing a polyoxymethylene copolymer, which comprises (1) heat-melting a crude copolymer of trioxane and a cyclic ether and/or a cyclic acetal to form a first stabilized copolymer having a decomposition ratio (D220 | 03/21/1989 |
| 4788258 | Low Tg non-crystalline acetal copolymers Low Tg copolymers of trioxane and 1,3-dioxolane which have a dioxolane content greater than 65 mol percent and less than about 75 mol percent and an IV of from about 1.0 to about 2.3, and which are non-crystalline at room temperature or above, are disclos... | 11/29/1988 |
| 4758608 | UV curable non-crystalline acetal terpolymers Ultraviolet curable terpolymers of trioxane, from at least 65 weight percent to about 75 weight percent of 1,3-dioxolane and from about 2 weight percent to about 20 weight percent of a monoethylenically unsaturated aliphatic diol formal having at least 4 ... | 07/19/1988 |
| 4751272 | Process for producing oxymethylene copolymer and resinous composition A process for producing an oxymethylene copolymer, comprising the steps of polymerizing trioxane and cyclic ether in the presence of a boron trifluoride catalyst, adding a hindered amine compound to the polymer obtained by said polymerization, and stabili... | 06/14/1988 |
| 4744934 | Process for devolatilizing molten oxymethylene polymer A process is provided for reducing black speck formation which occurs during melt processing of oxymethylene polymer compositions containing polyamide stabilizers having a melting or softening point below the melting point of the oxymethylene polymer and ... | 05/17/1988 |
| 4734481 | Novel organometallic polymers Homopolymers or copolymers of organometallic, end-capped polyphthalaldehydes containing the repeating unit of formula I ##STR1## wherein R1, R2, R3 and R4 are each independently of the other hydrogen, halog... | 03/29/1988 |
| 4727132 | Method of continuous manufacturing of polymers or copolymers of trioxane A trioxane polymer is continuously produced with a continuous stirring-mixing apparatus. The apparatus includes two mutually parallel rotational shafts, a large number of paddles mounted on each rotational shaft and a barrel having an inside wall surface ... | 02/23/1988 |
| 4692505 | Process for preparing oxymethylene polymers using boron trifluoride in admixture with an inert gas Oxymethylene polymers are prepared by the continuous polymerization of trioxane using as a catalyst a blend of boron trifluoride gas and nitrogen gas. Oxymethylene polymers are used in the manufacture of plumbing fixtures, pipes, automobile body parts and... | 09/08/1987 |
| 4692290 | Process for devolatilizing molten oxymethylene polymer A process is provided for removing volatile materials from a molten oxymethylene polymer, according to which the molten polymer is passed through a rotating disk polymer processor having at least three stages; a first devolatilization stage, then a stabil... | 09/08/1987 |
| 4681927 | Process for producing oxymethylene copolyer A process for producing an oxymethylene copolymer by copolymerizing trioxane with at least one cyclic comonomer selected from the group consisting of cyclic ethers and cyclic formals, said process comprising (1) polymerizing trioxane alone or with a cyclic co... | 07/21/1987 |
| 4569983 | Polymer materials A high modulus polymer material is produced by subjecting a crystallizable polymer to a thermal treatment under conditions such that the possibility that a given molecular chain is incorporated in more than one crystal lamella is substantially reduced and... | 02/11/1986 |
| 4543388 | Thermosettable polymers or prepolymers prepared from polymethylated pyrazines and aromatic polyaldehydes and cured products therefrom Thermosettable prepolymers or resins are prepared by reacting a pyrazine containing at least two substituent groups which have a hydrogen atom attached to a carbon atom which is attached to the ring with a material containing at least two aromatic aldehyd... | 09/24/1985 |
