UN PROCEDIMIENTO DE PREPARACION DE UNA COMPOSICION ADHESIVA ACUOSA.COMPRENDE PREPARAR UNA DISPERSION EN DISOLVENTE MEZCLANDO CAUCHO, NEGRO DE CARBONO, UN AGENTE DE VULCANIZACION, UNA RESINA DE PEGAJOSIDAD Y UN ACELERADOR CON SUFICIENTE DISOLVENTE ORGANICO PARA FORMAR UNA DISPERSION EN DISOLVENTE, Y EMULSIONAR SEGUIDAMENTE LA DISPERSION EN DISOLVENTE EN PRESENCIA DE AGUA PARA FORMAR UNA EMULSION AC...

METODO PARA PREPARAR UN GENERO COMPUESTO ENREDADO.CONSISTE EN HACER PASAR A TRAVES DEL LAMINADO (9, 18) QUE ESTA SOPORTADO POR EL ELEMENTO DE SOPORTE (12) PERMEABLE A LOS LIQUIDOS, UNAS CORRIENTES DE LIQUIDO (14) SEPARADAS LONGITUDINAL Y TRANSVERSALMENTE, PARA ENREDAR MUTUAMENTE LAS FIBRAS DE LA SEGUNDA CAPA (9) CON LA CAPA BASE (18) Y PRODUCIR UN GENERO COMPUESTO (28), SIN QUE AFECTE AL TRAZADO N...

A sealing cap for mating to cylindrical parts such as the bolt guide of a spot-type disk brake. The cap includes a resilient boot one end portion of which is adapted to be secured circumferentially to a first cylindrical part and the other end portion of which is adapted to be secured circumferentially to a second cylindrical part. At least one of said end portion comprises a rigid insert member. ...

A method for producing low density polyester foam includes heating the resin to a temperature in the range of from 80 DEG to 140 DEG F, combining the resin with a blowing agent such as a suflonyl hydrazide, combining the resulting admixture with a catalyst, and depositing the catalyzed resin on a surface. The density of the resulting foam can be decreased by incorporating a flourinated hydrocarb...

Acrylic-type normally tacky and pressure-sensitive adhesives are firmly bonded to polyolefn substrates that have been primed by coating with a monomer composition and subjecting the coated substrate to actinic radiation to effect graft-polymerization.

Low density foams are prepared from an admixture which comprises a medium which is polymerizable and/or crosslinkable by free radical initiation, carbonylhydrazine blowing agent, a peroxide curing agent, a suitable surfactant, and at least one transition metal salt promoter wherein at least one of the metal salts is a compound of iron or copper. The blowing agent in the presence of an effective am...

1. A sheet of transparent plastics material of high optical quality comprising a layer based on polyurethane having energy-absorbing properties, characterised in that the layer having energy-absorbing properties is formed essentially of a polyurethane obtained by reactive casting on a flat horizontal support of a reaction mixture of an isocyanate component of viscosity less than 5 Pas at 40 degree...

Ethylene vinyl alcohol copolymer (60 - 99 wt.%) is blended with polyetheramide block copolymer (1 to 40 wt.%) to produce a film-forming composition of matter useful in packaging films into which the blended composition can be extruded and/or coextruded with other layer materials. For example, the blend is one layer in a plural layer film, and at least the blend layer is molecularly oriented uniaxi...

The substitution chlorination reactions of organic compounds are carried out by means of molecular chlorine, using, as a radical initiator, decachlorobutane or an octachlorobutane such as octachlorobut-1-ene or a mixture containing these two products. Good degrees of conversion and good yields are obtained at moderate temperatures. The process is, for example, applicable to the substitution chlori...

A method of treating teeth with a photopolymerizable composition comprising at least one olefinically unsaturated monomer and an acylphosphine oxide catalyst.

An electric cigar lighter, such as used in a motor vehicle, has a bimetallic switch in the form of a snap disk positioned within a socket. When using commercial appliance plugs with such a snap disk, the diameter of the socket does not need to be enlarged compared to conventional sockets. Contact bounce and contact interruptions are prevented. These advantages are achieved by placing the contact d...

Bioreactive materials, for use in forming implants or prostheses, obtained by fusion of a mixture of 20 to 50% by weight of SiO2, 15 to 25% by weight of CaO, 5 to 10% by weight of P2O5, 15 to 25% by weight of Na2O and 3 to 15% by weight of Al2O3, or their metallic precursors yielding equivalent quantities of oxides by fusion.

1. A paste for haemostasis and temporary bridging of defects in cases of bone trauma, characterized in that it contains from 3 to 60 % by weight of prolamin and from 5 to 20 % or tricalcium phosphate or hydroxyl apatite in finely dispersed form and a physiologically compatible diluent.

A ferrous sulphate hydrate product for use as chromate reducing agent for dry cement is made from a technical or commercial grade ferrous sulphate heptahydrate by one or more treatments selected from moderate drying, powder dilution, physical absorption, and chemical absorption. In particular, the technical grade ferrous sulphate heptahydrate is mixed with fly ash or gypsum and subjected to a mode...

A method for sealing a rim-like opening in a glass container is described. The surface of the opening is treated with tin and/or titanium oxide precursors and with or without one or more of the groups consisting of fluorides, sulfur oxides and sulfur oxide precursors and then overcoated with a chromium III organic metallic complex. A membrane comprising a thermoplastic film is pressed onto the coa...

A transducer system that provides accurate measurements of a physical variable such as pressure for any one of a number of different transducers. Each transducer includes special calibration indicators for identifying any inaccuracies in its output signal, and monitoring and correcting circuitry is selectively attachable to any one of the transducers, to read the calibration indicators and apropri...

Endoprosthesis for cotyloid cavity, comprised of an implantable support (1) and of an insertion piece (2) secured thereto and forming the articulation surface (14), the support and the insertion piece having contact surfaces (5, 6) which co-operate and are symmetrically arranged as to the rotation or star mounting to a medial axis of the support (9), whereas the shape of the articulation surface (...

Two pharmaceutically useful fractions of hyaluronic acid are obtained comprising a first fraction with a molecular weight between 50,000 and 100,000 which is useful for wound healing, and a second fraction having a molecular weight between 500,000 and 730,000 which is useful for intraocular and intraarticular injections. The fractions of hyaluronic acid are further useful as vehicles for opthalmic...

Hirudin can be obtained using a specific DNA sequence in a genetic engineering process. The gene is advantageously synthesised in the form of several fragments which are enzymatically ligated to give two larger part-sequences which are incorporated into hybrid plasmids and amplified in host organisms. The part-sequences are reisolated and then combined to form the complete gene which is incorporat...

The invention relates to a probe constituted by an oligonucleotide fragment of structure predetermined by the application envisaged, wherein at least a part of the adenine groups therein is replaced by modified adenine groups so that they can form three hydrogen bonds with the reactive groups of thymine or uracil. This probe is useful in the field of biological analyses and extractions.