Abstract:
Flame-retardant polycarbonate compositions and methods for increasing the flame-retardancy of polycarbonate compositions are disclosed. A glass fiber, alumina particles, and wollastonite particles are added to polycarbonate compositions. The addition of the glass fiber, alumina particles, and wollastonite particles to the polycarbonate composition produces a polycarbonate composition having a flame-retardance rating of UL 94 5V-A at 2.3 mm thickness or less. The inventive compositions retain good surface quality.
Abstract:
The present invention provides a dual-cure composition containing multifunctional polyols, uretdiones, peroxide curable monomers containing unsatu ration and crosslinking agents. The dual-cure composition may be used to form a high modulus material useful as the matrix in a prepreg material and in composites. The present invention also relates to methods for the production of the dual-cure composition, prepreg materials comprising the dual-cure composition and a fibrous support, and composites made from the prepreg material.
Abstract:
Aqueous polyurethane coating compositions are disclosed in this specification. The aqueous polyurethane coating compositions contain a polycarbonate-polyurethane resin component, an aminopiast resin component, and a polyacrySic polyol component.
Abstract:
A method of irreversibly immobilizing an enzyme in a polyurethane and an enzyme-containing polyurethane having a degree of immobilization of the enzyme of approximately 100%. The synthesis of waterborne polyurethanes in the presence of enzyme has enabled the irreversible attachment of the enzyme to the polymeric matrix. The distribution of immobilized enzyme as well as activity retention are homogeneous within the polyurethane. Decreasing ECC hydrophobicity, via the use of a less hydrophobic polyisocyanate prepolymer during polymerization, significantly enhanced the intrinsic activity of the ECC.
Abstract:
This invention relates to stable, low-viscosity polymer polyols and to a process for preparing these stable, low-viscosity polymer polyols, These polymer polyols comprise (a) a base polyol component that comprises a natural oil base polyol having a mean hydroxy I functionality of 1.7 to 5.0, a number average molecular weight of about 350 to about 725, and an OH number of 190 to 500.
Abstract:
Polyurethane/polyisocyanurate foams having a NFPA 101 Class A rating (ASTM E-84) are produced from a foam-forming reaction mixture that includes: an organic polyisocyanate, an isocyanate-reactive composition that includes at least one polyether polyol or polyester polyol with a nominal hydroxy I functionality of at least 2.0, a blowing agent composition and at least one halogen-free flame retardant. The blowing agent composition includes: (1) up to 5% by weight, based on total weight of the foam-forming composition, of one or more hydrocarbons having an LEL less than 2% by volume in air; and/or (2) a hydrocarbon having an LEL greater than 2% by volume in air; and (3) up to 1 % by weight, based on total weight of foam- forming composition, of water.
Abstract translation:具有NFPA 101 Class A等级(ASTM E-84)的聚氨酯/聚异氰脲酸酯泡沫体由泡沫形成反应混合物制备,所述泡沫形成反应混合物包括:有机多异氰酸酯,异氰酸酯反应性组合物,其包含至少一种聚醚多元醇或聚酯多元醇 标称羟基I官能度为至少2.0,发泡剂组合物和至少一种不含卤素的阻燃剂。 发泡剂组合物包括:(1)基于泡沫形成组合物的总重量,至多5重量%的空气中LEL小于2体积%的一种或多种烃; 和/或(2)在空气中LEL大于2体积%的烃; 和(3)基于泡沫形成组合物的总重量至多1重量%的水。
Abstract:
A thermoplastic molding composition characterized by its flame retardance and impact strength is disclosed. The composition contains (A) linear aromatic (co)polycarbonate, (B) a graft (co)polymer having core-shell morphology, the shell containing polymerized alkyl(meth)acrylate and the core containing interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate components, (C) a phosphorous-containing flame retardant compound, (D) fluorinated polyolefin and (E) a boron compound, and optionally SAN. The composition is further characterized in that it contains no polyalkylene terephthalate.
Abstract:
A thermoplastic composition suitable for making articles having low gloss and good impact resistance at low temperatures is disclosed. The composition contains (A) 10 to 90 percent relative to the weight of the composition (pbw) of an aromatic (co)poly(ester)carbonate, (B) 10 to 90 pbw of first graft (co)polymer containing a graft base selected from the group consisting of polyurethane, ethylene vinyl acetate, silicone, ethylene-propylene diene rubbers, ethylene propylene rubbers, acrylate rubbers, diene rubbers, and polychloroprene, and a grafted phase, (C) 1 to 20 pbw of a linear glycidyl ester functional polymer comprising repeating units derived from one or more glycidyl ester monomers and (D) 1 to 20 pbw of a second graft (co)polymer containing a core and shell wherein the core contains an interpenetrated network of poly(meth)alkyl acrylate and polyorganosiloxane, and wherein the shell contains poly(meth)acrylate.
Abstract:
Two-component coating compositions, methods for their preparation and use are disclosed. The two-component coating compositions include an isocyanate-functional component and an isocyanate-reactive component comprising a hydroxyl-functional polymer. The isocyanate-functional component includes: (a) an aliphatic polyisocyanate containing allophanate structural units; and (b) a cycloaliphatic polyisocyanate comprising an allophanate group and an isocyanurate trimer group.