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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4504640 | Process for producing monoallylamine polymer By polymerizing an inorganic acid salt of monoallylamine in a polar solvent in the presence of a radical initiator having, in its molecule, an azo group and a group having cationic nitrogen atom, a polymer of monoallylamine having a high degree of polymer... | 03/12/1985 |
| 4485225 | Method for continuous copolymerization of ethylene and vinyl acetate The invention provides a method of continuously copolymerizing ethylene and vinyl acetate in a solvent in the presence of a radical initiator without causing gel formation.... | 11/27/1984 |
| 4476053 | Surface-active azo compounds Surface-active azo compounds corresponding to the following general formula ##STR1## in which ##STR2## R represents C1 -C4 -alkyl, R1 represents the residue diminished by the isocyanate groups of an aliphatic, ar... | 10/09/1984 |
| 4452737 | Surface-active azo compounds The invention relates to surface-active azo compounds obtainable by reacting azo compounds corresponding to the following general formula (I): ##STR1## in which X and Y are the same or different and represent ##STR2## and R represents C1 | 06/05/1984 |
| 4386192 | Process for the preparation of polymers of definite viscosities Process for the preparation of copolymers of definite specific viscosities from hydantoin vinyl ethers of the formula I and olefinically unsaturated compounds by free-radical polymerization of the monomers in a solvent mixture consisting of cyclohexane an... | 05/31/1983 |
| 4373077 | Anaerobically curing compositions Anaerobically-curing compositions are described which are free of peroxy initiators and inorganic salt initiators and which comprise (A) a polymerizable monomer; (B) as a first initiator component, a compound selected from the group consisting of organic ... | 02/08/1983 |
| 4334049 | Process for the preparation of finely divided solid polymers in polyol Finely-divided polymeric solids are prepared by free-radical polymerization on ethylenically unsaturated monomer or monomers in an organic solvent employing an alkylene oxide adduct of a styrene-allyl alcohol copolymer stabilizer.... | 06/08/1982 |
| 4325794 | Combined visible light and thermally activated continuous polymerization process Continuous process for the preparation of water-soluble polymers in which highly concentrated monomer solutions may be polymerized by a combination of a visible light and a thermally initiated process.... | 04/20/1982 |
| 4321349 | Accelerator for curable compositions Curable acrylate ester compositions having as an accelerator for the polymerization a hydrazine derivative of the formula R1 --HN--NH--CO--R2. Typical of the monomers are the polyalkyleneglycol dimethacrylates and the so-called ureth... | 03/23/1982 |
| 4306045 | Process for producing acrylamide polymers In the production of a dried acrylamide polymer by polymerizing, in an aqueous medium, acrylamide alone or a monomer mixture comprising 50 mole % or more of acrylamide and at least one monomer copolymerizable therewith with a radical initiator, and then d... | 12/15/1981 |
| 4287330 | Accelerator for curable compositions Curable acrylate ester compositions having as an accelerator for the polymerization a hydrazine derivative of the formula R1 --HN--NH--CO--R2. Typical of the monomers are the polyalkylene-glycol dimethacrylates and the so-called uret... | 09/01/1981 |
| 4277592 | N-vinylamide polymers and process for their manufacture using two types of initiators A tertiary N-vinylamide is polymerized, optionally together with further monomers, in the presence of an aliphatic hydrocarbon, at a temperature of from 0° to 150° C., using two types of initiator one of which is insoluble and the other soluble in the h... | 07/07/1981 |
| 4268652 | Color styrene-acrylonitrile polymers A process for reducing the color of styrene-acrylonitrile polymers comprising polymerizing a feedstream of styrene and acrylonitrile monomers, optionally admixed with a diluent, in the presence of an unsymmetrical tertiary-aliphatic-alpha-cyano-azoalkane ... | 05/19/1981 |
| 4260713 | Process for producing water-soluble polymers Water-soluble polymers having high molecular weight with little branching and good water solubility, particularly acrylamide series polymers having excellent flocculation effect can be obtained when 2,2'-azobis-(N,N'-dimethyleneisobutylamidine) or an acid... | 04/07/1981 |
| 4258148 | Graft copolymers from unsaturated monomers and azo di-ester polyols and polyurethanes prepared therefrom Graft copolymers are prepared by the polymerization of an ethylenically unsaturated monomer, or a mixture of such monomers, in the presence of an azo di-ester polyol. Presence of the azo group in the polyol reactant itself serves as a free radical initiat... | 03/24/1981 |
| 4256809 | Ambient or low-temperature curable coatings for leather and other flexible substrates Ambient or low-temperature curable aqueous dispersions of (1) an emulsion polymer containing units polymerized from a monomer mixture of (a) from about 0.25% to about 10% by weight of a polymerizable aldehyde, (b) from about 0.5% to about 10% by weight of... | 03/17/1981 |
| 4232141 | Method for the preparation of vinyl chloride polymers An improved method for the polymerization of vinyl chloride or a monomer mixture mainly composed of vinyl chloride in an aqueous polymerization medium is proposed in which a water-insoluble polymerization initiator, being solid at room temperature as disp... | 11/04/1980 |
| 4219476 | Tertiary aliphatic amidazo compound An unsymmetrical azo compound having the formula ##STR1## is provided wherein R" is an alkyl or aralkyl and R3 and R4 are hydrogen or aliphatic. The compound is useful as a vinyl polymerization initiator, a polyester resin curin... | 08/26/1980 |
| 4218370 | Azo monomer useful in polymerization systems An unsymmetrical azo monomer contains t-alkyl, t-cycloalkyl, or t-aralkyl moiety and one polymerizable double bond. This compound is useful in polymerization and crosslinking systems.... | 08/19/1980 |
| 4175101 | Acrylonitrile block terpolymer barrier resins Novel block copolymers of acrylonitrile having good gas-barrier and impact-resistance properties are prepared by copolymerizing acrylonitrile and another comonomer, such as methyl acrylate, using an elastomer prepolymer containing free-radical initiator g... | 11/20/1979 |
| 4174430 | Process for producing porous polystyrene gel A porous polystyrene gel is produced by a suspension polymerization in an aqueous system under an incorporation of more than 5 mole % of a radical polymerization catalyst to a total amount of styrene and divinyl benzene with an inert organic solvent.... | 11/13/1979 |
| 4166169 | High-strength anaerobic sealants containing N-nitrosoamine modifier An anaerobic sealant composition capable of polymerizing upon exclusion of air comprises (1) a polymerizable mixture of polyacrylic ester monomer which includes a polyacrylic ester derived from alkoxylated bisphenol-type compounds, (2) an inorganic salt i... | 08/28/1979 |
| 4161468 | Process for the preparation of graft polymer dispersions employing liquid free radical catalysts Graft polymer dispersions are prepared by the in situ polymerization in the presence of a free radical catalyst of an ethylenically unsaturated monomer or mixture of monomers in a liquid polyol employing as the free radical catalyst a liquid unsymmetrical... | 07/17/1979 |
| 4158726 | Process for preparing bead polymers Disclosed is a process for preparing a water-soluble bead polymer by dispersing drops of an aqueous solution of water-soluble vinyl monomer in a dispersing medium in the presence of a dispersion stabilizer, and polymerizing the monomer by using monomer se... | 06/19/1979 |
| 4151339 | Perester-acyl sulfonyl peroxide co-initiator for vinyl polymerization A process for polymerizing vinyl chloride and for copolymerizing vinyl chloride and up to 30 percent by weight of comonomers in aqueous suspension under heat and pressure in the presence of a mixture of an acyl sulfonyl peroxide and a perester of the form... | 04/24/1979 |
| 4126737 | Anaeorbically hardening adhesives and sealants based on (meth)acrylic esters containing reaction products of glycidyl-(meth)acrylate and half esters containing carbonate groups Reaction products of glycidyl (meth)acrylate with half esters containing carbonate groups are components of anaerobically-setting adhesive compositions based on (meth) acrylic esters and organic peroxides.... | 11/21/1978 |
| 4125695 | Polymerization process with reduced cycle time employing polyfunctional free radical initiators A process for the free radical polymerization of vinyl monomers, including vinyl aromatic monomers, wherein the temperature of the polymerization is progressively increased by at least 30° C during the period of the polymerization a temperature range of ... | 11/14/1978 |
| 4112211 | Process for the manufacture of homo- and copolymers of tetrafluoroethylene employing as the reducing agent in the redox catalyst an ayodicarboxylic acid, salt of ayocarboxylic acid, azodicarbonamide, or mixtures thereof Polymers on the basis of tetrafluoroethylene are produced in the presence of a redox system as catalyst consisting of a usual peroxidic compound as oxidizing component and a water-soluble nitrogen compound liberating in situ a diimine under the polymeriza... | 09/05/1978 |
| 4103077 | Green strength of synthetic elastomers The green strength of synthetic elastomers is improved by mixing a synthetic elastomer such as synthetic cis-1,4-polyisoprene or polybutadiene with from about 0.25 to about 2.0 parts by weight of a dihydrazide compound per 100 parts of the elastomer. Upon... | 07/25/1978 |
| 4096323 | Anaerobically hardening adhesives and sealants based on (meth)acrylic esters containing reaction products of glycidyl(meth)acrylate and half esters of dicarboxylic acids Reaction products of glycidyl (meth)acrylate with linear half esters of dicarboxylic acids are components of anaerobically-setting adhesive compositions based on (meth)acrylic esters and organic peroxides.... | 06/20/1978 |
| 4093792 | Copolymerization product of N-vinylmethylpyrazole and divinyl cross-linking agent and method of preparing same In accordance with the present invention, a copolymerization product of N-vinylmethylpyrazole with a divinyl cross-linking agent has the following formula of its elemental unit: ##STR1## wherein R is CH3 in the position 3 or 5; A is a divi... | 06/06/1978 |
| 4075199 | Tertiary aliphatic alpha-peroxyazo compounds Tertiary-aliphatic alpha-peroxyazo compounds represented by the structure ##STR1## processes for preparing these compounds by reacting ##STR2## with salts or salt solutions of... | 02/21/1978 |
| 4070348 | Water-swellable, bead copolymer Water-swellable, cross-linked, bead copolymers of (A) an ethylenically unsaturated monomer having a carboxylic acid anhydride, glycidyl or succinimide group, (B) a comonomer having at least two radical-polymerizable carbon double bonds, and (C) a radical-... | 01/24/1978 |
| 4069377 | Polymerization of ethylenically unsaturated monomers employing secondary-aliphatic -substituted azoalkanes Secondary-aliphatic -substituted azoalkanes, such as 1-isopropylazo-1-azidocyclohexane, and processes using such azoalkanes as polymerization initiators for vinyl monomers and as curing agents for resins.... | 01/17/1978 |
| 4063012 | Polymerization of ethylenically unsaturated monomers employing catalyst of aliphatic -(hydroperoxy)azo compounds and salts thereof New aliphatic azo compounds containing an -hydroperoxy group and the alkali metal and alkaline earth metal salts thereof as represented by the general structure ##STR1## processes for preparing I where M is H and R is t-aliphatic by reacting ... | 12/13/1977 |
| 4056670 | Anaerobic adhesive and sealant compositions employing as a catalyst - Anaerobic curing compositions useful as anaerobic adhesives and sealants are described. These compositions comprise mixtures of polymerizable acrylic and substituted acrylic monomers together with a catalyst comprising an alpha-amino sulfone compound.... | 11/01/1977 |
| 4049605 | Process for the polymerization of acrylonitrile The present invention relates to a process for the polymerization of acrylonitrile or a monomer mixture containing acrylonitrile as a main component and at least one other ethylenically unsaturated compound, characterized in that the polymerization is con... | 09/20/1977 |
| 4048423 | Process for polymerizing unsaturated monomers and unsaturated polyester resins employing unsymmetrical tertiary-aliphatic azoalkanes Unsymmetrical azo compounds (R")3 C--N.dbd.N--R' where (R")3 C-- is tert.-aliphatic and R' is --C(R1)(R2)(Z) or ##STR1## e.g., 1-t-butylazo-1-chlorocyclohexane, their use as vinyl polymerization initiators ... | 09/13/1977 |
| 4039527 | Unsymmetrical azonitriles Unsymmetrical azonitriles of the formula, ##STR1## wherein R1, R2, R3 and R4 are independently straight- or branched-chain alkyl having 1 to 7 carbon atoms or alkoxy substituted straight- or branched-chain ... | 08/02/1977 |
| 4033983 | Nonflammable coating material An improved nonflammable coating composition containing vinyl chloride, dialkyl maleate, and bis (2-chloroethyl) vinyl phosphonate, the improvement comprising forming a tertelomer using a free radical initiator in the presence of xylene, wherein the alkyl... | 07/05/1977 |
