Abstract: Thermosetting resins are provided that are toughened with an irradiated thermoplastic toughening agent and which have reduced levels of solvent-induced micro crack formation. The thermoplastic toughening agent is treated with a sufficient amount of high-energy radiation (e.g. electron beam or gamma rays) to cause a reduction in solvent-induced micro crack formation in the cured resin when compared to the same toughened thermosetting resin in which the non-irradiated version of the thermoplastic toughening agent is used.
Type:
Grant
Filed:
April 14, 2008
Date of Patent:
February 3, 2015
Assignee:
Hexcel Composites Ltd
Inventors:
John L. Cawse, Stephen Mortimer, Chrisopher J. Wade
Abstract: Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described.
Abstract: Sulfonated condensation products that are stable in storage and have increased thermal stability are based on aminoplastic formers having at least two amino groups or naphthalene and formaldehyde and, optionally include organic nitrogen bases which additionally contain, as nitrogenous formulation auxiliary agents, compounds of general formula (I) R1—NH—X—Y—R2, wherein R1 and R2 independently represent H, —CH3, —C2H5, —C3H7, —(CH2)n—CH2—; X?—CH2, CO, CS; Y?S, NH, —(CH2)m—; n=0 to 9; m=1 to 4; and/or compounds of general formula (II), wherein Z?—OCH3, —SO3—H, —SO3Na+, —NO2, —NH2, —NH—NH2, —CO2—Na+, —CHO. The mole ratio of aminoplastic formers: formaldehyde: sulfite: nitrogenous formulation auxiliary agents rangin from 1:1.9 to 6.0:1.0 to 2.0:0.01 to 1.5 and/or the mole ratio of naphthalene sulfonic acid: formaldehyde; nitrogenous formulation auxiliary agents equals 1:0.7 to 3.0:0.01 to 1.5. Method for preparing these condensation products of using them, e.g.
Type:
Grant
Filed:
September 29, 2000
Date of Patent:
March 8, 2005
Assignee:
SKW Polymers GmbH
Inventors:
Uwe Holland, Martin Matzinger, Johann Plank
Abstract: Melt-processible, thermoplastic poly(tetrafluoroethylene) (PTFE) compositions are disclosed and methods for making and processing same. Additionally, products comprising these compositions are described.
Type:
Grant
Filed:
February 16, 2000
Date of Patent:
May 18, 2004
Assignee:
Omlidon Technologies LLC
Inventors:
Paul Smith, Jeroen F. Visjager, Cees Bastiaansen, Theodorus Tervoort
Abstract: A melamine-urea-formaldehyde resin modified with a cyclic urea prepolymer and sodium metabisulfite. Products prepared with the binder include wood composites such as particleboard and medium density fiberboard.
Type:
Grant
Filed:
April 29, 2002
Date of Patent:
May 20, 2003
Assignee:
Georgia-Pacific Resins, Inc.
Inventors:
Pablo G. Dopico, Stacey L. Wertz, James C. Phillips, George E. Mirous
Abstract: A process of preparing multicyanate esters by: a) reacting an adduct of a tertiary amine and a phenol-formaldehyde oligomer or derivative thereof with cyanogen halide in a solvent reaction medium under conditions to form a reaction product stream containing at least one of the following compounds selected from the group consisting of tertiary amine-hydrohalide salt, solvent, and impurities, and, based upon the total weight of the reaction product stream excluding the weight of said tertiary amine-hydrohalide salt, from about 10 percent to about 40 percent of a multicyanate ester; b) recycling a portion of said reaction product stream into the mixture of step a; and c) separating and recovering said solvent and tertiary amine from said reaction product stream. The multicyanate ester products produced are useful as bonding agents in friction materials, molding materials, coatings, and adhesives.
Abstract: Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases and formaldehyde, obtainable by(A) sulfonation of phenols with from 1.0 to 1.5 moles of sulfuric acid per mole of phenol and(B) condensation of these sulfonation products with(a) from 0.5 to 1.8 moles of urea per mole of phenol,(b) from 0.001 to 0.5 moles of at least one other organic nitrogen-base per mole of phenol, and(c) from 1.0 to 3.0 moles of formaldehyde per mole of phenol.The condensation polymers are suitable for use as tanning agents in the leather and skin-producing industry and as spraying aids for redispersible polymer powders.
Type:
Grant
Filed:
May 28, 1992
Date of Patent:
August 30, 1994
Assignee:
BASF Aktiengesellschaft
Inventors:
Juergen Weiser, Wolfgang Reuther, Karl Stork, Ortwin Schaffer, Gernot Franzmann, Thomas Schwerzel, Maximilian Angel, Joachim Pakusch, Brigitte Wegner
Abstract: Mineral tanned leather is frequently retanned with synthetic tanning agents to improve the fullness and softness, but leather retanned by the prior art methods is difficult to dye in full shades with anionic dyes. According to the invention, condensation products of C.sub.1-4 aldehydes with certain aromatic sulfonic acids or carboxylic acids containing amino groups are employed for retanning, thereby improving the receptivity of the leather for anionic dyes. These acids have the general formula ##STR1## where X and X' are independently H, --CH.sub.2 --SO.sub.3 H or --CH.sub.2 --OH, A is a benzene radical, Y and Z are independently H, --SO.sub.3 H or --CO.sub.2 H, R is H or C.sub.1-4 -alkyl and n is from 0 to 10, with the proviso that at least one sulfonic acid or carboxyl group is present in the molecule.