Sealants: Patent Titles
Patents with Abstracts
LaFevre and Patil of Dryvit Systems, Inc., Rhode Island, sealed a construction joint by applying a polymeric sizing to the edges forming the joint, applying a mesh to the joint and applying a further coating of the sizing to said deposited mesh. The sizing material can comprise a styrene-butadiene latex, a filler and at least one of a colorant, an acrylic thickener, dispersant, biocide, defoamer, antifoamer, surfactant and an acid. (RDC 8/16/2012)
Crosslinkable compositions based on organosilicon compounds
Scheim et al of Wacker Chemie, Germany, developed sealants based on organosilicon compounds contain at least one heterocyclic compound A[CR12SiRa(OR2)3-a]x which contains at least one heteroatom from main groups 3 or 5 and is bonded to CR12 through one of these heteroatoms. (RDC 7/30/2012)
Rapid deep-section cure silicone compositions
Ramakrishnan and Nesakumar of Momentive Performance Materials Inc., New York, developed siloxane polymers and zinc oxide and their uses in sealant formulations possessing rapid deep-section cure. This sealant consists of a) silanol-terminated diorganopolysiloxane; b) crosslinker for the silanol-terminated diorganopolysiloxane(s); c) a catalyst for the crosslinking reaction; d) a rapid deep-section curing amount of zinc oxide. The silicone sealant compositions of the present invention find application in insulating glass units as elements of windows, skylights, doors and related products. (RDC 7/27/2012)
Plasticizer free caulks and sealants having improved aged wet adhesion
Demarest et al of Rohm and Haas, Pennsylvania, developed filled aqueous caulk and sealant compositions made from high solids aqueous binders chosen from copolymers having a mixture of backbone acid and hydroxyl groups that are copolymerized from 0.5 to 7.5 wt. %, based on total monomer weight, of an hydroxyl group containing monomer, and mixed backbone acid copolymers that are copolymerized from methacrylic acid (MAA) with a second acid monomer having a lower pKa than the pKa of MAA. Preferred, compositions comprise one or more organosilane exhibit the adhesion and joint movement capability required by ASTM C-920-08, as well as good weatherability and aged wet adhesion to glass, even at a filler to binder ratio of 0.2:1 to 4:1. (RDC 6/27/2012)
Jeeng et al of the Industrial Technology Research Institute, Taiwan, develop a sealant consisting of (a) an oligomer including an unsaturated mono-carboxylic acid modified bisphenol A epoxy resin and an unsaturated mono-carboxylic acid modified bisphenol F epoxy resin, wherein an equivalence ratio of the bisphenol A epoxy resin to the bisphenol F epoxy resin is 0.05:0.95 to 0.3:0.7, the bisphenol A epoxy resin has a melting point higher than 40.degree. C. and the bisphenol F epoxy resin has a melting point lower than 40.degree. C.; (b) an epoxy resin having at least two or more than two epoxy groups; and (c) a photoinitiator. (RDC 6/26/2012)
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Roger D. Corneliussen
Maro Polymer Links
Tel: 610 363 9920
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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 6/26/2012.