Abstract: A floor mat is formed essentially of cross-linked polyolefin foam for the lining of the floor interiors of motor vehicles. This mat includes a cross-linked polyolefin foam floor mat base having at least one preselected surface area covered with a permanently applied floor-protecting surface layer. The layer is made up of cross-linked polyolefin foam layer and a thermoplastic polymeric film which is heatable in a high-frequency electrical field in dielectric fashion and which exhibits wear resistance superior to the cross-linked polyolefin foam or base. The cross-linked polyolefin foam base is preshaped to conform to the contours of the floor interior of a motor vehicle.

Abstract: New process for making esters of .alpha.-hydroxymethylene arylacetic acid from the corresponding arylacetic acid ester by conversion with an alkali alcoholate and carbon monoxide. The resulting hydroxy methylene compound can be obtained from the resulting alkali salt by release with an acid.

Abstract: A process for effecting the recovery and use of a heavy metal oxidation catalyst from a high-boiling distillation residue obtained during the Witten process for the production of dimethyl terephthalate involves the extraction of the high-boiling distillation reside with water or dilute aqueous solution of low molecular weight aliphatic monocarboxylic acids or alcohols and recycling of the extract into the oxidation stage of the Witten process. In the extract the quantitative ratio of the sum of the amount of trimellitic acid and monomethyl ester of trimellitic acid to the amount of heavy metal catalyst is controlled to be at a value of no more than 1.8:1 and in the oxidation stage of the Witten process the catalyst concentration (c), expressed in p.p.m., is represented by the formula:c=44.multidot.(a/b)+dwherein a represents the sum of trimellitic acid and monomethyl ester of trimellitic acid, b is the amount of heavy metal oxidation catalyst within the extract, and d is in a range of from 60 to 300 p.p.m.

Abstract: A sliding window with a frame provided with a glazing adapted to be mounted in a wall of masonry, wood, or the like. The frame is composed of frame profiles joined at the corners and contains glass panes inserted therein. The glass panes are guided in grooves of the frame profiles and are horizontally displaceable. The frame profile members are constructed of an extrudable synthetic resinous material, with the profile members having a U-shaped cross sectional configuration made up of two projections fashioned as hollow chambers. An undercut mounting groove is arranged between the two projections and a web, connecting the projections, is formed of two juxtaposed hollow chambers. One of the juxtaposed hollow chambers facing a weather side of the window is provided with perforations for draining the mounting groove, with a second of the juxtaposed hollow chambers containing, if desired, an inserted reinforcing profile.

Abstract: A molding composition contains an ester-compatible, thermoplastic and/or elastomeric synthetic resin, optionally other additives including plasticizers, stabilizers, pigments, mold lubricants fillers, antioxidants, high-polymeric additives and bitumen and the DMT distillation residue formed during the manufacture of dimethyl terephthalate by the Witten process. Generally the composition contains at least 5 parts by weight of the residue per 100 parts by weight of the synthetic resin.

Abstract: An improved process for the preparation of oligomeric bromine containing xylylene bisphenol ethers is described wherein xylylene dichlorides and/or dibromides are reacted with bisphenols at 85.degree. to 160.degree. C. in the presence of an alkaline compound or employing the bisphenol in the form of an alkali salt wherein the reaction is conducted employing a ketone as solvent.

Abstract: Process for purifying hexamethyldisiloxane contaminated with toluene or other solvents that cannot be completely separated from the hexamethyldisiloxane by distillation, based on the discovery that hexamethyldisiloxane forms a previously unknown azeotrope with acetonitrile. This azeotrope has a heavier phase that is rich in acetonitrile and a lighter phase that is rich in hexamethyldisiloxane. These phases are mutually immiscible. The azeotrope starts to boil at 71.4.degree. C., which permits the hexamethyldisiloxane to be separated at relatively low temperatures from the impurities. The process involves one or more entrainment distillations in the presence of an excess of acetonitrile and the re-separation of the acetonitrile from the resulting lighter phase by distillation. Two further novel azeotropic systems, one consisting of hexamethyldisiloxane and toluene and the other of acetonitrile and toluene, are provided.

Abstract: A dome-shaped molded component or device for use with an operative element, e.g. a hollow-charge mine, is adapted to be connected at a continuous rim with the operative element. The device comprises a flexible body formed of an elastic material and at least one venting means for venting a cavity defined by the body when the device is placed in its functional or operative position. The device also has a rib arranged on the body for causing the body to deploy from a collapsed introverted inoperative initial position to an extended extroverted, operative position. The body part of the device is compressed under elastic deformation and is held in this position by a retaining unit for applying an external force to the device so that the device is collapsed within the operative element. Upon release of the externally effective force, the rib effects the deployment of the body into its functional or operative position.

Abstract: The present invention relates to foams made of resol-type phenolic resins which do not discolor as quickly as prior-art phenolic foams. With the additive in accordance with the invention, even colored foams will not darken as readily. The foams in accordance with the invention contain as stabilizers salts of phosphinic acid or phosphonic acid, such as the primary alkali phosphites or the alkali phosphinates. The stabilizers, which protect the foams against the action of light and/or air and/or heat, are used in amounts ranging from 0.1 to 5 weight percent. The present invention further relates to methods of preparing such foams. In a preferred method, the stabilizers are admixed with an expandable resol-type phenolic resin, the mixture so obtained is mixed with the other substances necessary to formation of a foam, and the whole mixture is then foamed conventionally.

Abstract: An insulating panel suitable for the covering of roof structures includes a core layer of a synthetic foam material bonded adhesively on its top side to a sealing thermoplastic layer. The core layer is formed of an elastic closed-cell crosslinked polyolefin foamed material.

Abstract: Completely biodegradable, toxicologically innocuous, oxidation-resistant, flavorless and odorless, light-colored, homogeneous liquid ester mixtures with low turbidity points, low evaporation losses at elevated temperatures, and viscosities and densities adjustable as desired, comprising the products of esterification of 1 mol of glycerin with from 1.4 to 2.8 mols of a saturated aliphatic monocarboxylic acid having from 6 to 10 carbon atoms, or mixtures thereof, and from 0.1 to 0.8 mol of a saturated aliphatic dicarboxylic acid, or mixtures or anhydrides thereof, said ester mixtures having hydroxyl numbers ranging from 5 to 20 and an acid number of less than 5.

Abstract: A process for promoting the oxidation of an explosive-containing mixture or a pyrotechnical mixture involves utilizing zinc peroxide as the sole or predominant oxidant in the mixture. Preferably the zinc peroxide has an available oxygen content of more than 12.3% by weight.

Abstract: A plasticizer-containing film of a partially acetalized polyvinyl alcohol resin contains as the plasticizer a mixture of an ester of an organic cyclic acid and/or a conventional acetal plasticizer for said resin, and an ester of an oxygen acid of phosphorus.

Abstract: A base material for the production of printed circuits according to the additive method includes a laminate base made up of laminated-together core sheets impregnated with hardenable resin, and a cover layer made up of a substrate sheet preimpregnated with phenolic resol resin and provided with an adhesive layer of an elastomeric polymer. The preimpregnated substrate sheet is also provided with a further resin impregnation containing a self-crosslinking copolymer of acrylic monomers and up to 30% by weight of a hardenable phenolic resol resin.

Abstract: A process for obtaining solid alkali metal aluminates from an alkali metal aluminate aqueous solution by spray drying an alkali metal aluminate aqueous solution having an alkali metal oxide concentration of 1 to 6 mols per liter and an alkali metal oxide to alumina molar ratio of greater than 1. Also disclosed is an apparatus employed for effecting spray drying in which a spray drier of unidirectional flow is employed whose longitudinal axis is substantially horizontally disposed.

Abstract: A propellant charge igniter includes a casing that contains a central contact member, an igniter element, a sealing element associated with the igniter element, and a powder charge. The sealing element has on a side facing the powder charge, an annular collar in sealing contact with an inner wall of the casing.

Abstract: This invention relates to solutions of silanols prepared by hydrolysis of alkyltrialkoxysilanes whose alkoxy groups are partially or completely hydrolyzed.Preferred hydrolyzed alkyltrialkoxysilanes are of the formula CH.sub.3 --CH.sub.2 --CH.sub.2 --Si(OH).sub.n (OH').sub.3-n.

Abstract: A process for the production of colorful and figurative designs of shaped synthetic-resin articles with the use of colorants, involves the step of coloring a shaped article formed of a synthetic resin at least partially with a colorant that changes color by being exposed to ionizing rays and the step of exposing the article to ionizing rays in selected zones corresponding to the figurative design until color changes are achieved.

Abstract: There are disclosed substituted lactones of the formula ##STR1## wherein A stands for --CH--CH.sub.2 X (X being Cl, Br or OH), --CHY--CHY-- (Y being Cl or Br), or ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are the same or different radicals from the group of hydrogen and C.sub.1 to C.sub.10 alkyls, at least one of the radicals R.sup.1, R.sup.2 and R.sup.3 being such an alkyl radical, and process for making the same.

Abstract: A process for the preparation of dimethyl terephthalate by the oxidation of p-xylene/methyl p-toluate mixtures, preferably with air, esterification of the resulting acid products, and recycling of the methyl p-toluate to the oxidation stage, employs an oxidation catalyst consisting of a combination of cobalt and manganese compounds. The concentration of manganese (Mn.sup.++) ranges between about 0.0001% and about 0.005% by weight.