Abstract: The present invention provides a novel high pressure water cleaning device. The cleaning device of the present invention provides means to mechanically manipulate a high pressure water nozzle. The invention is particularly suitable for cleaning the drier trays of tunnel driers which are used in rubber manufacturing processes.

Abstract: The invention relates to a vulcanizable composition containing a partially hydrogenated nitrile polymer and a resin vulcanization system.

Abstract: A thermoplastic polymer comprising a styrenic monomer, an acrylate, a methacrylate and a block copolymer is provided which possesses an unexpected excellent balance of properties including good physical properties, good elongation and a high degree of transparency. Also provided are processes for the preparation of the thermoplastic polymer.

Abstract: High solids aqueous based pressure sensitive adhesives may be prepared by directly emulsifying the tackifier resin into a polymeric latex provided the tackifier is heated, plasticized and emulsified and mixed with the latex on a high shear mixer. This gives an adhesive which is faster drying and gives comparable properties to lower solids adhesives.

Abstract: Rubbery thermoplastic blends comprise an acrylonitrile-butadiene-styrene or a styrene-acrylonitrile polymer, a rubbery carboxylated butadiene-acrylonitrile polymer and a metal oxide or hydroxide.

Abstract: A new rubber composition, the vulcanizate of which has reduced permeability to gases, comprises: one hundred parts by weight of at least one butyl-type rubbery polymer; from about 3 to about 20 parts by weight of .alpha.-methylstyrene homopolymer having a softening point of from about 93.degree. C. to about 150.degree. C. and a Tg of from about 15.degree. C. to about 75.degree. C.; from about 30 to about 90 parts by weight of at least one carbon black, from 0 to about 7 parts by weight of hydrocarbon extender oil; and a curing system. A process for producing said rubber composition is also provided.

Abstract: A consolidated web may be produced by impregnating it with a compound of latex of a polymer comprising from about 10 to about 45 weight percent of a C.sub.3-6 alkenyl nitrile; from about 36 to 85 weight percent of a C.sub.4-6 conjugated diolefin; from about 5 to 20 weight percent of a monomer mixture comprising from 100 to about 60 percent of a C.sub.8-12 vinyl aromatic monomer which may be unsubstituted or substituted by a C.sub.1-4 alkenyl radical or a chlorine or bromine atom; from 0 to 40 weight percent of a C.sub.1-2 alkyl ester of acrylic or methacrylic acid; from about 0.5 to 10 weight percent of at least one, C.sub.3-6 ethylenically unsaturated carboxylic acid; and from about 0.1 to 5 weight percent of an N-C.sub.1-4 alkylol derivative of an amide of a C.sub.3-6 ethylenically unsaturated carboxylic acid; from 40-100 parts by weight of a filler, an effective amount of a gelling agent and optionally a cure paste.

Abstract: Atmospheric contamination by residual hazardous particles remaining on a substrate following removal from the substrate of a layer of material containing such particles is substantially reduced by coating the substrate with certain aqueous coating compositions which produce tacky films on drying. For example, the health hazard from airborne asbestos fibers remaining attached to a substrate from which a layer of asbestos-containing material has been removed is substantially reduced by coating the substrate with an aqueous latex composition containing certain carboxylated butadiene styrene polymers.

Abstract: Passing a sample of a liquid dispersion or emulsion of solid or immiscible liquid particles through one or more filters having a selected pore size less than 5000 A permits separation of the dispersed phase by particle size and/or separation of the dispersed phase from the continuous phase. The process is applicable to obtaining samples of dispersed particles, particularly latex, for analysis.

Abstract: A thin tough glossy surface may be applied to a flexible substrate in a one step process comprising: applying an aqueous thin film of a compound of a polymer to an endless carrier belt made of a material having a low adhesion to said polymer, contacting the flexible substrate and coated carrier belt and keeping them together while they pass around a hot drum laminator at a temperature of from about 100.degree. to about 150.degree. C.The process is suitable for applying impermeable surfaces to non wovens, and foam backed carpet.

Abstract: Latex may be extended with up to about 40% by weight of an emulsion of asphalt, bitumen or coal tar. The extended latex is useful in adhering scrim to carpet or in the manufacture of attached foamed carpet backing.

Abstract: Rubber compositions for use in tire tread compounds comprise co-vulcanizable blends of high 1,2 (vinyl) content polybutadiene of high molecular weight and high cis-1,4-poly-butadiene of high molecular weight. The blends show a high degree of homogeneity, so that they act effectively as a single polymer, and exhibit a substantial absence of a glass transition temperature. Both of the polymers in the composition should have a relatively high weight average molecular weight. The relative amounts of the two polymers are such as to obtain a 1,2-group content in the blend of from 35-65 percent (i.e. from 35-65 percent of the polymer units are in the 1,2-configuration). The blend may be compounded with conventional compounding ingredients for curing purposes, and optionally with additional polymers as natural rubber and/or SBR. The vulcanizates of the compositions exhibit a superior and unexpected balance of resilience, traction and wear properties.

Abstract: A process is provided for affixing to a substrate a non-tacky, flexible layer consisting of a raw polymer mixture of a minor proportion of high density polyethylene, linear low density polyethylene or isotactic polypropylene and a major proportion of elastomeric polymer of which at least about 50 percent by weight is butyl rubber, by applying a stretching elongation to the flexible layer before application to the substrate. The process may be used in a wide variety of applications, for example, to cover metal parts, make repairs to cracked cover components and electrical wiring splicing and to repair leaks in pipes or hoses.

Abstract: The disadvantages associated with using plastic sheet mulch may be overcome and enhanced crop production obtained by applying to an agricultural domain an aqueous compound capable of forming a durable crust under the condition of use comprising per 100 parts by weight of polymeric binder from about 100 to about 1,600 parts by weight of a fine particulate filler to provide a dry coat weight from 0.1 to 5.0 ounces per square foot.

Abstract: The resistance to heat and light aging of webs of natural or synthetic fibers is improved by using as a binder a composition comprising a latex of a polymer containing a carboxylic acid functional group, which has been neutralized with a fixed alkali, preferably in conjunction with a latent acid.

Abstract: A thermoplastic polymer comprising a styrenic monomer, an acrylate, a methacrylate and a block copolymer is provided which possesses an unexpected excellent balance of properties including good physical properties, good elongation and a high degree of transparency. Also provided are processes for the preparation of the thermoplastic polymer.

Abstract: Many synthetic latices are produced with a small particle size. It is desirable to increase the particle size and concentrate the latex. It is known to use agglomerating agents to increase particle size. The temperature of agglomeration may be reduced if the latex is destabilized with a weak acid, preferably carbonic acid. This results in an energy saving for the process.

Abstract: There is provided a tubeless pneumatic tire with an inner liner having puncture sealing characteristics comprising as the inner liner a puncture sealing laminate having an outer halobutyl polymer containing layer and an inner polymer containing layer, the inner layer of the laminate having been reacted with a zinc peroxide compound.

Abstract: Polymer-fibre mixtures with improved homogeniety of dispersion of fibres throughout the polymer matrix are prepared from fibres prior mixed or coated with a plasticizer which is compatible with both the fibre and the polymer matrix. Then the plasticizer-fibre combination can be mixed into the polymer matrix, using standard polymer mixing equipment and for reasonable lengths of time, to produce a mixture in which agglomerations of fibres are very materially reduced. A preferred fibre is a fibrillated aramid fibre, dispersion of which in polymers has previously caused particular difficulties. Suitable polymers include hydrocarbon elastomers such as SBR, for use with which an aromatic mineral oil is a preferred plasticizer, and oil-resistant NBR elastomers, for use with which an ester plasticizer such as dioctyl phthalate is preferred.

Abstract: A thickening agent having improved resistance under alkaline conditions comprises a synergistic mixture of an acrylate polymer and bentonite. These thickening agents are useful in textile padding and drilling muds.