摘要:
A liquid system includes a liquid medium and a thickening mixture, the thickening mixture being dispersed in the liquid medium and comprising a synergistic mixture of a gum-type polymer and an acrylic-type polymer. The thickening system is applicable to a wide variety of systems, including detergent and cleaning compositions.
摘要:
Hollow polymer particles having at least two polymer layers, wherein (1) the particles have an average particle diameter in the range of 0.15 to 20 micrometers, (2) each of the particles has an average equivalent hollow diameter/equivalent particle diameter in the range of 0.2 to 0.8, (3) the proportion of a toluene-insoluble portion of the particles is 20 to 90 % by weight, (4) the polymer particles have a melt flow rate at 180 °C under 10 kgf/cm² of 0.1 to 1 g/10min., (5) the inside layer of the two polymer layers is composed of a crosslinked polymer and (6) the outside layer of the two polymer layers is composed of a non-crosslinked polymer. This invention also provides hollow crosslinked polymer particles wherein the proportion of a toluene-insoluble portion of the particles exceeds 85 % by weight, the melt flow rate of the polymer particles at 180 °C under 10 kgf/cm² is less than 0.2 g/10 min., and the outside layer is composed of a crosslinked polymer. The hollow polymer particles are useful, for example, as a pigment and for a paper coating composition and a general-purpose coating composition.
摘要:
An ink jet recording sheet comprising a support and an ink-receptive layer containing polyethylene oxide and a white filler; in accordance with more preferred embodiments, the layer additionally includes a resin to enhance binding strength and a cationic resin or salt.
摘要:
Aqueous vinyl ester/ethylene copolymer emulsions possessing good dry pick and wet pick strengths in paper coating compositions comprise a vinyl ester/ethylene copolymer colloidally dispersed in an aqueous medium, the copolymer consisting essentially of (a) a vinyl ester of a C 1 -C 12 alkanoic acid, (b) about 0.5 to 15 wt% ethylene, (c) about 0.1 to 10 wt% of an ethylenically unsaturated mono- or dicarboxylic acid or half ester thereof, (d) about 0.05 to 10 wt% of a dicyclopentadienyl acrylate, and (e) 0-50 wt% of an alkyl acrylate.
摘要:
High strength pigment binders for paper coating having increased water retention and stability are disclosed. The coating compositions comprise an aqueous synthetic polymer latex and pigment and may contain other additives used in the art of pigmented paper coating. The latex comprises an interpolymer of a vinyl ester, an organofunctional silane, carboxyl and/or amide functionality and optionally an alkyl acrylate, ethylene and/or other polymerizable comonomers.
摘要:
A highly efficient formaldehyde-free coating composition insolubilizer is prepared by reacting about 3 moles of glyoxal with 1 mole of urea resulting in a formation of a low molecular weight oligomer in a yield of 95-96%. The molar ratio of glyoxal to urea is very critical in obtaining the highest efficiency and is kept within narrow limits. The coating compositions of the present invention possess 2 till 4 times higher wet-rub resistance than the prior art compositions.
摘要:
Verfahren zur Herstellung von pulverförmigen Polymerisaten auf Basis von wasserlöslichen ethylenisch ungesättigten Monomeren durch Polymerisieren von Säuregruppen enthaltenden Monomeren, die in Wasser oder Wasser-Isopropanol-Mischungen gelöst sind, in einem Pulverbett in Gegenwart üblicher Polymerisationsinitiatoren unter Aufrechterhaltung des Pulverzustandes, Abführen der Polymerisationswärme durch Abdestillieren der Lösungsmittel und Umwälzung der Reaktionsmasse, wobei 40 bis 95 % der Säuregruppen der Monomeren neutralisiert sind und die Polymerisation in Gegenwart von 3 bis 10 Mol%, bezogen auf die Monomeren einer Thiocarbonsäure, eines Metallsalzes bzw. Chelates, eines Enolethers oder 2-Mercaptoethanol als Regler durchgeführt wird. Die so erhaltenen Homo- und Copolymerisate werden als Mahlhilfsmittel und Dispergiermittel für Pigmente und als Inkrustierungs- und Vergrauungsinhibitoren für Waschmittel verwendet.