3258 results about "Latex rubber" patented technology

A simple to use, inexpensive and readily portable surgical practice and teaching kit is described that includes in portfolio form a two layer practice suturing pad including a latex rubber layer simulating human skin attached to a plastic foam layer that simulates underlying human tissue, the foam layer having incorporated therein simulated subcutaneous growths or lesions such as simulated lipomas or sebaceous cysts. The practice pad is mounted on a folder or portfolio for convenient access and use by the student or practitioner, the portfolio also including pictorial illustrations showing various proper suturing techniques as a visual guide to the user in practicing suturing procedures.

The invention is directed to latex compositions comprising sequentially designed polymer having a first stage, a second stage and a third stage corresponding to a seed, a core and a shell. The latex polymer is suitable for aqueous low volatile organic compounds (“VOC”) paint (less than 50 g / L) with good block resistance, improved open time and increased water softening resistance. To attain good block resistance, the seed and the core contain monomers that form polymers with relatively harder characteristics and higher glass transition temperature (“Tg”) while the shell contains monomers that form polymers with softer characteristics and lower Tg. To gain improved open time, the latex polymer contains suitable level of hydrophilic monomers necessary to hold water. To achieve water softening resistance, hydrophobic monomers are grafted on hydrophilic portions of the shell or the core layers. The invention is also directed to the process of making the latex by a sequential emulsion polymerization.

A speculum sheath which covers a speculum and methods for using the sheath are described herein. A variety of different types of specula may be covered with the sheath, including anal, vaginal, ear, and nasal specula. The sheath is made of a compliant or partially compliant material, including latex, vinyl, natural and synthetic rubbers, silicone, nylon, polyethylene, polypropylene, and non-degradable or degradable elastomers. The material may be transparent or opaque. In the preferred embodiment, the material is transparent. The sheath may contain one or two openings. Optionally, the sheath contains an affixing means on the inside of or at least one of the openings on the sheath to prevent slippage when in contact with the speculum. Optionally, the sheath contains an active agent, such as hemostatic agents, anti-infectives, antibiotics, antimitotics anti-inflammatory, or other chemotherapeutic agents. In the preferred embodiment, the sheath is placed on a vaginal speculum and supports loose vaginal tissue when inserted into a patient. In the most preferred embodiment, the material is transparent so that medical provider may view the lumen.

The invention relates to compound thermal insulation plastering material for external wall, which consists of a compound cementing material and a lightweight aggregate. The compound cementing material consists of cement, active admixture, lime powder, promoter, surfactant, anti-crack and waterproof agent, water retaining agent, flame retardant, re-dispersible emulsion powder, alkali-resistance fiber and coal flying ash cenosphere; the lightweight aggregate consists of EPS grain and expanded perlite. The invention has the advantages of low density, thermal performance, high strength, good impact resistance, bond strength and low shrinkage. The compound cementing material adopts a plurality of polymeric cementing materials, allows the insulation material to have good bond performance and simultaneously ensures falling and slipping resistance performance. The invention has good water resistance and high softening coefficient. By using cement-based cementing material as main material and organic reinforced material and waterproof component as auxiliary materials, the invention has a hydrophobic rate more than 98 percent and a softening coefficient more than 0.7. The invention can save energy and protect environment. A great deal of industrial waste residue is used in the materials, which can save a great number of energy, realize resource utilization of the waste residue and is in favor of environmental protection.

The present invention discloses one kind of green powdered paint and its preparation process. The green powdered paint consists of re-dispersible polymer latex powder 5-20 wt%, white cement 20-40 wt%, calcium carbonate 20-45 wt%, titanium white powder 5-25 wt%, diatomite 2-8 wt%, bentonite 1-2 wt%, cellulose ether 0.2-0.5 wt%, defoaming agent 0.2-0.5 wt% and coloring pigment 0-4 wt%. It is prepared through mixing all the components in a stirrer, and packing. It is used after mixing with water in construction site. It has the combined decoration functions of both putty and emulsion paint and may be used widely for decorating inner and outer wall.

The invention provides a fluorine-silicon modified self-crosslinking acrylic ester emulsion and a preparation method thereof, belonging to the technical field of polymer synthesis. The emulsion is a product formed by organosilicon monomers, fluoride-containing acrylic monomers, (methyl) acrylic monomers and self-crosslinking monomers through core-shell emulsion polymerization. The preparation method adopts a core-shell emulsion polymerization method, thereby ensuring that the fluoride-containing acrylic monomers tend to surface polymerization, and fluorine atoms tend to polymer surface in emulsion film forming process; moreover, the monomers capable of self-crosslinking is added to a shell layer, so as to utilize the crosslinking of the monomers to fixedly limit the migration of the fluorine atoms towards the inside of latex particles, as well as the swing of chains, thereby ensuring that the performances of the fluoride-containing emulsion are completely embodied. The preparation method improves the water resistance, stain resistance, solvent resistance, weather resistance and other comprehensive performances of the emulsion. The fluorine-silicon modified self-crosslinking acrylic ester emulsion prepared through the preparation method can be widely applied to high-grade building paint, industrial paint and wooden ware varnish. Moreover, the preparation method has the characteristics of simple manufacturing process, easy reaction condition control, good emulsion stability and environment-friendly property.

Compositions and methods for release of adherent deposits from surfaces and substrates are provided. The compositions are low volatile organic compound (low VOC) compositions, solutions or mixtures. Adherent deposits removed using the compositions include grease and oil, shoe polish, crayons, candle wax, gum, lipstick, stickers, adhesives, tape and others. The compositions may be used on any surface or substrate including carpet, fabrics, metals, painted surfaces (oil and latex), wallpapers and plastics, without harming the surface or substrate.

The present invention finds that a detackified natural rubber latex product can be provided by a combination of treatment with a hydrophilic group sealant, coating with a detackifying polymer, halogenation and the like. The present invention also finds that a detackified natural rubber latex product which causes no discoloration of a metallic product surface can be provided by coating it with a detackifying, carboxylated latex vulcanized without using sulfur. The present invention also finds that a detackified natural rubber latex product of controlled protein elution can be provided by chemically modifying protein present in the natural rubber latex with an anionic group, cationic group or the like.

The invention relates to a test method for simulating the shear resistant strength change of foundation pit precipitation soil. The test method comprises the following steps of: firstly, preparing an original-shape soil sample by using a fret saw, a soil cutter, a soil cutting disk, and the like; secondly, carrying out exhausting and water injection on the sample in a vacuum tank to be saturated;thirdly, mounting a test sample in which a latex film is sleeved in a three-axle pressure chamber; fourthly, solidifying the test sample at two phases through a three-axle ambient pressure system, wherein the test sample is restored to be in a natural self-weight stress state of a soil body by using the first-time solidification and the stress state of the soil body subjected to precipitation is simulated by using secondary solidification; fifthly, carrying out an un-drained shear test on the test sample through an axial loading system; and sixthly, after the test is ended, closing a motor and a valve and detaching the test sample. According to the test method disclosed by the invention, the influence of the reduction for water content of the foundation pit precipitation soil, the increase of effective stress and soil solidification and compaction on the soil shear resistant stretch is considered so as to provide reference for accurately selecting shear resistant strength indexes of the foundation pit precipitation soil and further provide guarantee for designing and constructing deep foundation pits of soft soil water-rich stratum safely, economically and reasonably.

The invention discloses low-density composite foaming cement and a preparation method thereof, relating to a light building material. The foaming cement is prepared by adopting a normal-temperature foaming technology, and comprises the following components in parts by weight: 100 parts of cement, 10-50 parts of active admixture, 1-5 parts of redispersible emulsion powder, 1-4 parts of water repellent, 0.5-1.5 parts of cellulose ether, 0.3-0.7 parts of reinforced fiber, 0.2-0.5 parts of foam stabilizer, 3-8 parts of foaming agent and 50-80 parts of water. The method comprises the following preparation steps of: proportionally mixing and stirring the cement, active admixture, redispersible emulsion powder, water repellent, cellulose ether, reinforced fiber, foam stabilizer, and water into cement slurry; adding the foaming agent; and stirring, molding by casting and naturally curing. The foaming cement disclosed by the invention has the advantages of low volume weight, small heat conducting coefficient, small shrinkage ratio, high intensity, integration of heat preservation, sound insulation, fire prevention and low carbon, simple and convenient production preparation process and easiness in controlling.

Disclosed is a nonwoven airlaid fabric comprising a combination of synthetic fibres and of natural fibres which has been consolidated by application and crosslinking of a crosslinkable polymer dispersion. These products can be used as acquisition and distribution layers in personal care products.

The invention relates to a sulfur and a phosphate cement insulation mortar or an insulation board, the insulation mortar and the insulation board are prepared by uniformly mixing the following raw materials by weight: 9-36 parts of heavy roasted magnesium oxide, 9-32 parts of dihydric phosphate, 0.5-7 parts of thickening time control agent, 6-25 parts of light roasted magnesium oxide, 0.5-7 parts of sulfur-containing component, 1-25 parts of industrial waste residue powder, 0-25 parts of reinforced thickening agent, 1-20 parts of diatomite, 5-35 parts of expansion aggregate, 0-5 parts of polystyrene foam particles, 1-15 parts of dispersible latex powder and 0-0.2 parts of chopped fiber. The insulation board can be a solid board material or a hollow board material. The sulfur and phosphate cement insulation mortar or the insulation board enables simple technology, and is especially suitable for constructing in low temperature season, no hollowing crack phenomena can be generated after constructing, and the sulfur and phosphate cement insulation mortar or the insulation board is especially suitable for insulation heat insulation material of building walls.

A simple to use, inexpensive and readily portable surgical practice and teaching kit is described that includes in portfolio form a two layer practice suturing pad including a latex rubber layer simulating human skin attached to a plastic foam layer that simulates underlying human tissue, the foam layer having incorporated therein simulated subcutaneous growths or lesions such as simulated lipomas or sebaceous cysts. The practice pad is mounted on a folder or portfolio for convenient access and use by the student or practitioner, the portfolio also including pictorial illustrations showing various proper suturing techniques as a visual guide to the user in practicing suturing procedures.

The invention discloses an energy-saving type concrete crack repairing agent which comprises the following components in parts by weight: 12-18 parts of sand, 5-10 parts of a quartz powder, 20-35 parts of ordinary portland cement, 10-18 parts of sulphoaluminate cement, 6-12 parts of sodium silicate, 5-9 parts of a polyvinyl acetate emulsion powder, 3-7 parts of silica fume, 7-10 parts of a slag powder, 6-9 parts of fly ash, 8-10 parts of an expansive agent, 0.4-0.6 part of a polycarboxylic acid type high-efficiency water-reducing agent, and 0.2-0.4 part of polypropylene fiber. The concrete repairing agent has high bonding strength, and significantly improves the binding force between a new concrete interface and an old concrete interface; the concrete repairing agent is short in congealing curing time, fast in development of strength after congealing, and suitable for rapid repairing; the concrete repairing agent has the advantages of environmental protection, no toxicity, no smell, harmlessness to human bodies, single-component construction, and no pollution to the environment; and the concrete repairing agent can be used for repairing of concrete cracks, holes, honeycombs and pock marks, and drawing repairing of seams of face bricks and mosaic.

The invention belongs to the building material field, relates to vitrification bead, thermal insulation mortar and preparation method thereof. A sepiolite fiber modified vitrification bead thermal insulation mortar has the following components of the mass percentages of: 52.5R common portland cement 35-55% fly ash5-15%, heavy calcium powder 1-5%, vitrification bead 35-55%, redispersable latex powder 0.5-2%, cellulose ether 0.1-0.3%, starch ether 0.025-0.07%, air-entrainer 0.01-0.02%, and sepiolite fiber 0.5-2%; wherein, the grades and proportions of the sepiolite fiber are: 3-5mm 30-40%, 5-10mm 40-50%, 10-15mm 20-30%. The epiolite fiber modified vitrification bead thermal insulation mortar of the present invention achieves the advantages of excellent construction performance, no-cracking, good bonding performance to wall, high strength, good thermal insulation performance and low cost.

The invention discloses a silicone modified acrylic ester emulsion and a preparation method thereof. The emulsion is prepared from the following raw materials in parts by weight: 6.5-9 parts of acrylic ester mixed monomers, 1-3.5 parts of an organosilicone monomer, 0.4-0.6 part of an emulsifier, 0.2-0.3 part of an initiating agent, 0.01-0.03 part of a pH conditioning agent, 28-32 parts of deionized water, wherein the acrylic ester mixed monomers are methyl methacrylate and butyl acrylate with the mass ratio of (5.5-6.5):(3.5-4.5); the organosilicone monomer is gamma- 3-[Tris(trimethylsiloxy)silyl]propyl methacrylate. According to the emulsion, the reactive emulsifier is adopted for polymerization reaction, the prepared emulsion is stable, and the latex film of the emulsion has lower surface energy and better water resistance, and can be used as the main film forming matter of a metal anti-corrosion coating.

The invention belongs to the technical field of building materials, and particularly relates to an internal wall putty which comprises the following components in parts by weight: 150-300 parts of white cement, 500-900 parts of calcium carbonate powder, 10-50 parts of grey desert soil, 1-8 parts of cellulose ether, 7-30 parts of polymer latex powder, 1-10 parts of water repellent, 0.05-3 parts of starch ether and 0.5-7 parts of wood fiber. Compared with the prior art, the internal wall putty has the advantages that 107 glue water or 801 glue water is not used, thus formaldehyde is not contained, the environment is protected; and pregelatinized starch is not used, and the water repellent is added, thus the internal wall putty has the function of preventing water and moisture. In addition, with the white cement and the calcium carbonate powder as the strength basis and the grey desert soil as an auxiliary strength material, the strength of the internal wall putty is ensured; due to the synergistic effect of the cellulose ether and the starch ether, the water-retaining property and the application property of the internal wall putty are ensured; and because the polymer latex powder is added, the flexibility of the internal wall putty and the adhesion of the polymer latex powder and the wall are improved.

Flooring that utilizes sophisticated, self-stabilizing, woven face fabric using relatively heavy "carpet weight" nylon, polyester, PTT or other yarns on modern Jacquard computer controlled looms to produce flat-weave fabrics that are bonded to engineered backing structures. Urethane modified bitumen may be used as a backing layer, and an optional latex precoat may be used on the fabric layer, together with an optional antimicrobial in the precoat.

A handheld apparatus including (a) a motorized hand-piece including a mechanical rotatable coupling shaft which is caused to rotate so that it imparts a rotating motion to the coupling shaft; (b) an interface cup member which includes a body with an exterior surface having hook and loop fasteners thereon and a lower surface with an interface opening which is affixed to the coupling member of the mechanical rotatable shaft; and (c) the hand-piece individually retaining a multiplicity of different interchangeable components which are used for different purposes, each different component affixed on one surface to the hook and loop fasteners of the interface cup and which rotate when the motorized hand piece is energized and causes the interface cup to rotate.

The invention discloses light thermal insulation soundproof damping floor mortar, which is prepared by mixing the following components in percentage by mass: 30 to 40 percent of cement, 0 to 28 percent of coarse elastic rubber aggregate, 5 to 50 percent of fine elastic rubber aggregate, 5 to 15 percent of inorganic vitrified microsphere aggregate, 0.5 to 3 percent of redispersible emulsion powder, 0.05 to 0.15 percent of cellulose ether, 0.02 to 0.06 percent of 6mm fiber and 0.05 to 0.1 percent of hectorite aid. Inorganic silicate is taken as a binding material, so the light thermal insulation soundproof damping floor mortar has good compatibility with cement mortar and a concrete base, is firmly bound, avoids a hollowing phenomenon, is suitable for various base conditions, has a leveling function under the condition of poor evenness, is easy and convenient to construct, and can be scraped after being added with water and uniformly stirred; the whole soundproof layer is a whole, sound bridges are greatly reduced, the compression strength is moderate, the deformation hardly occurs, and the load of a building cannot be increased greatly; and the light thermal insulation soundproof damping floor mortar has low coefficient of heat conductivity, makes floors soundproof, and has the thermal insulation effect.

A system, apparatus, and method for coating and curing disposable containers, e.g. cups that are made from thermoplastic particles, e.g. expandable polystyrene particles (EPS), and that are coated with a coating, e.g. latex coating. The system comprises a preparation station, a coating station, a curing station, and a container handling station. An apparatus comprising a rotatable wheel is used to position the containers into the several stations. The rotatable wheel contains a plurality of container holding means that consists of vacuum means selectively operable for retaining and releasing the containers relative to the stations and a rotatable platform for selectively rotating the containers to evenly apply and / or dry the coating on the containers and to increase the production rate for coating and / or curing the containers.

Latex foams for filling cavities and crevices and for forming foamed products are provided. The latex foam includes a functionalized latex, a crosslinking agent and a blowing agent package, and optionally a non-functionalized latex. The foamable compositions may be two-part, having an A-side and a B-side to keep reactants separate until use. The blowing agent package may be the combination of two or more chemicals, such as acid and base, that when mixed together form a gas. In two-part compositions, the acid and base preferably are in separate sides to prevent premature gassing; in alternative one-part compositions, the spray latex foam may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application. The acid and / or base are preferably dry powder particulates, for example milled bicarbonate having a median particle diameter of from about 0.5 to about 40 microns, e.g. from about 2 to about 40 microns or from about 0.5 to about 5 microns.

The invention relates to dry powder paint for construction, which is prepared from polymer latex powder, titanium pigment, calcium carbonate, calcined kaolin, talcum powder, cellulose ether, a solid defoaming agent, a solid dispersing agent, a solid thixotropic agent and coloring pigment. The preparation method of the dry powder paint comprises the following steps: putting the components of the dry powder paint into a dry powder mixer for mixing for 20-40min, and then, removing bigger particles by using a vibratory screen with 120 meshes. The use method of the dry powder paint comprises the following steps: carrying out surface pretreatment on a wall body; pouring the dry powder paint into clear water and stirring and mixing evenly, standing, and then stirring again; and applying the obtained liquid paint by adopting a roller painting, spray painting or brush painting mode. The formed paint film has the characteristics of good water resistance, alkali resistance, weather resistance, washing resistance, dirt resistance and the like, has the performances of the traditional latex paint and does not contain components of VOC (zero VOC), heavy metals and the like harmful to the environment and the human health.

The invention relates to a preparation method of styrene-acrylate copolymer painting emulsion for elastic painting of inner and outer walls of a building. The preparation of styrene-acrylate copolymer painting emulsion comprises the preparation method of styrene-acrylate seed emulsion and the preparation method of painting emulsion and the styrene-acrylate copolymer painting emulsion mainly comprises styrene, acrylate, silane coupling agent, emulgator, initiator, defoamer, pH adjusting agent, molecular weight regulator and water. By utilizing the strong surface effect of organic nano particles and designability of the distribution of inner and outer polymers of emulsion particles and combining the seed emulsion aggregation method and the phase-control dispersion film formation technology, the painting emulsion with high performance is produced by utilizing conventional raw materials; and the compactness, mechanical property and the outdoor aging resistance problems of a paint film can be successfully solved. The painting emulsion can be used as a film formation substance for the inner-outer wall emulsion paint of different buildings and also can be used for preparing anticorrosion metal anti-corrosive primer and varnish of wooden doors and windows.

The object of the present invention is to provide a non-adhesive clean latex product and a method for manufacturing the same. A non-adhesive clean emulsion latex product is manufactured by adding a carboxyl-group blocking agent to a carboxylated latex or by providing a layer treated with the carboxyl-group blocking agent on one or both surfaces of a film of the carboxylated latex. Further, a non-adhesive, easy-to-wear-and-remove emulsion latex product is manufactured by affording a layer treated with a carboxyl group blocking agent on the inside surface of a carboxylated latex film and providing a chlorination treatment on the outside thereof. Furthermore, a sulfur-free, highly durable latex product can be manufactured by adding an aluminate or an aluminumhydroxide gel to the latex. The present invention also provides a non-powdered, clean, on-machine wound fingerstall.

The present disclosure provides for a formula and process for making elastomeric rubber thin film articles. In particular, the formula and process is a system which produces non-Hevea or Guayule natural rubber latex (GNRL) thin film articles which have a thickness of 30-80 microns (0.03-0.08 mm), and preferably less than 40 microns (0.04 mm). These thin film articles exhibit physical strength properties similar to that of Hevea brazilensis natural rubber latex (NRL). More specifically, the disclosed thin rubber thin film articles exhibit unaged tensile strength of at least 24 MPa (about 3500 psi) and aged tensile strength of at least 19 MPa (about 2800 psi).

The invention relates to an environment-friendly inner wall dry powder latex coating and a preparation method thereof. The compositions according to weight percentages are as follows: 10-40% of re-dispersible polymer latex powder, 10-40% of titanium dioxide, 10-40% of ground calcium carbonate, 5-20% of calcined kaolin, 5-10% of talcum powder, 0.1-0.5% of cellulose ether, 0.2-0.6% of solid defoamer, 0.2-1.0% of multifunctional auxiliary agent, and 0.01-10% of tinting pigment. The inner wall dry powder latex coating formed in the invention can have scumble construction after thinning by being added with two to three times of water, and the thickness of dry film is 20 microns to 200 microns; the color is tunable; the storage is stable, and the transportation is convenient; the VOC thereof cannot be detected (real zero VOC), and the coating film performances meet the technical requirements of national standard of inner wall latex coating; and the combination properties of products can reach international most advanced level of similar products.

The invention relates to desulfurized gypsum based antistatic self-leveling mortar and its preparation method. Adopting calcined desulfurized gypsum as the main raw material, the desulfurized gypsum based antistatic self-leveling mortar comprises the following components by weight: 25-45 of desulfurized gypsum, 5-10 of slag powder, 3-10 of fly ash, 5-12 of portland cement, 15-25 of quartz sand, 15-25 of steel slag sand, 0.03-0.2 of modified carbon fiber, 0.5-2.0 of redispersible emulsion powder, 0.02-0.07 of cellulose ether, 0.10-0.25 of a water reducer, 0.1-0.4 of an antifoaming agent, 1.2-2.5 of an early strength agent, 0.02-0.06 of a retarder, and 0.002-0.005 of a carbon nanotube. The desulfurized gypsum based antistatic self-leveling mortar has good antistatic performance, bonding property, wear resistance, as well as high compressive strength, and overcomes the defect of poor water proofness of gypsum based materials. By utilizing a lot of industrial solid waste, the self-leveling mortar of the invention has the advantages of environmental protection, energy saving, and low cost, etc., and can be applied in various building ground projects with requirements for electrostatic protection and levelability.

The invention relates to a desulfurization gypsum-based thermal insulation mortar and a preparation method of the mortar, belonging to the technical fields of solid waste comprehensive utilization and building material. The desulfurization gypsum-based thermal insulation mortar comprises the components in parts by weight: 1000 parts of desulfurization gypsum, 3-10 parts of white cement, 350-450 parts of glass beads, 5-15 parts of redispersible latex powder, 1-5 parts of wood fiber, 5-25 parts of sepiolite fiber, 1.5-5 parts of polypropylene (PP) fiber, 1-8 parts of polyvinyl alcohol, 1-5 parts of hydrophobic agent, 0.4-3 parts of retarder, 1-5 parts of water reducing agent and 2-6 parts of thickening agent. The desulfurization gypsum-based thermal insulation mortar is convenient to transport and has very strong thermal insulation performance and fireproof performance.

The invention discloses a making method of concave-convex bar-stone and natural rubber nanometer composite material, which comprises the following steps: dispersing through ultraviolet; modifying; blending; conglutinating; thinning; washing; dehydrating; melting; sulfurizing. The invention disperses nanometer crystal of concave-convex bar-stone in the natural rubber base, which improves rubber property.