Abstract: A simulator for simulating on a test sheet the actions of a dryer section of a paper making machine. The simulator includes a closed chamber to which there is connected a temperature and humidity control system to maintain the chamber in constant temperature and humidity during a test. A dryer fabric web is mounted within the chamber and is so guided as to have two parallel runs thereof in closely spaced relation. A holder is provided for mounting a test sheet between the two runs. Dryers are mounted above and below the two runs. The dryer fabric has openings therein which are selectively positioned in centered relation along the two runs so that the upper dryer may pass through an upper opening, pick up a test sheet and press the same against the dryer fabric of the lower run.

Abstract: Treatment of lignocellulosic materials with monoperoxysulfate to permit more ready separation of non-cellulosic materials therefrom to produce papermaking pulps is disclosed.

Abstract: An integrated process for recovery of heat and chemical values from spent pulping liquors are disclosed. Novel means for recovering heat values and residual entrained solids from the combustion gases are provided.

Abstract: A carton having upper and lower hingedly connected halves with "V" shaped cross sections, adapted to be folded compactly and firmly closeable when erected and filled with contents are disclosed. The cartons are especially suitable for use in packaging fast food items particularly hot or cold sandwiches on rolls or buns.

Abstract: Incorporation of various flame coolants, particularly ferrous oxalate, cupric oxalate and submicron size Fe.sub.3 O.sub.4 in N,N'-dihydroxyethane diamide containing gas generants results in cooler flame temperature and reduced HCN content. Use of downstream coolants further reduces evolved gas temperature and also further reduces HCN content. Devices incorporating these propellants are useful inflators for many devices such as helicopter flotation bags, cargo pallet soft-landing bags, aircraft escape slides, inflatable life rafts and similar items. They are particularly suitable when these items must be man-rated.

Abstract: Treatment of lignocellulosic materials and bleaching of wood pulp with monoperoxysulfate to permit more ready separation of non-cellulosic materials therefrom to produce papermaking and bleached pulps.

Abstract: Press dried paper sheets from certain ozonated high yield pulps are disclosed. Such sheets show substantially improved strength over comparable sheets prepared from non-ozonated pulps and over non-press dried sheets from ozonated pulps.

Abstract: Heat treatment of never-dried dissolving pulps prior to drying prevents or retards the hornification and consequent decrease in esterification reactivity which normally occurs on drying of untreated pulps.

Abstract: Bisdithiocarbamate esters of di-lower alkyl formals and related compounds are disclosed. The final products are useful as rubber cure accelerators, biocides, antioxidants, corrosion inhibitors, and sulfur bearing oil additives.

Abstract: Treatment of high yield wood pulp which has ether extractives of greater than about 3.0% at temperatures of about 105.degree. C. or higher for at least about 16 hours followed by fluffing of the heat treated pulp results in a relatively inexpensive absorbent for oil spills and the like. The oil is readily recovered from the absorbent or the oil and absorbent may be burned as fuel without separation.

Abstract: Treatment of dissolving pulp derived from wood with small quantities of C.sub.2 -C.sub.18 carboxylic acids and subsequent storage of the treated pulp, under conditions where little acid evaporation can occur, for periods of about two hours or more results in a product which has more uniform reactivity toward standard activation techniques in subsequent esterification reactions which produce known cellulose esters. At certain concentrations conventional activation techniques may be dispensed with.

Abstract: Compositions of matter comprising a liquid thiol terminated polysulfide polymer, a liquid epoxy resin and a liquid amine terminated polymer containing from about 1.7 to about 4 amine groups per molecule of the general formula ##STR1## wherein Y is a univalent radical derived by removal of an amine hydrogen from an aliphatic, alicyclic, heterocyclic or aromatic amine containing from 2 to about 20 carbon atoms and at least 2 amino groups and B is a polymeric backbone comprising carbon-carbon linkages are disclosed. Insulated window units fabricated therefrom possess superior mechanical and dewpoint retention properties.

Abstract: High solids mastics comprising a curable liquid resin binder, granular mineral filler and an organo titanate coupling agent, processes and apparatus for their use in continuous filling of defects in cellulosic boards, as well as, articles of manufacture produced therefrom are disclosed. The resin binder in fluid condition may either be a high solids latex emulsion or certain selected curable liquid resin systems.

Abstract: Photopolymerizable screen printing inks comprising a hydroxyalkyl acrylate-type monomeric material, a polyester binder and a free-radical initiating system, such inks having a viscosity of from 5,000 to 200,000 centipoises, an acid number of from 0 to 120 and a thixotropic index of from 1 to 4. The process of using such inks to treat substrates, such as in making printed circuits, which includes the steps of screen printing the photopolymerizable ink on the substrate; exposing the ink to actinic radiation to cure the ink and to form a resist; and permanently modifying the exposed areas on the substrate. The resist may thereafter be removed by dissolving in aqueous dilute alkali or an organic solvent.

Abstract: Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.

Abstract: A new photopolymerizable composition which contains an addition polymerizable monomer, a photoinitiator, and an improved binding agent which is a polymer of three types of monomeric materials, namely, a styrene-type monomer, an acrylate monomer, and an alpha, beta-unsaturated carboxyl-containing monomer. These compositions are useful for flexible photopolymerizable films which, after exposure, may be developed in aqueous alkaline solutions. These films may be used as photo-resists, screen stencils and printing plates.

Abstract: Fully and partially aryl amine terminated polysulfide polymers and processes for their preparation and use are disclosed. The fully aryl amine terminated products are curable with isocyanates to high molecular weight polymers and are thus useful in molding and casting as well as in sealants. The partially aryl amine terminated polymers may be further reacted with polyisocyanates to form thiol terminated polysulfide polymers containing urea chain segments. These compounds are curable in the fashion of standard polysulfide polymers to form firmer polymers. The partially aryl amine terminated polymers may be also chain extended with isocyanate terminated urethane prepolymers. These block copolymers may be cured by standard SH terminated polysulfide polymer cure methods to prepare sealants of exceptional resiliency and weather resistance.

Abstract: Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.

Abstract: Mixtures of alkali metal azides, metal and metalloid oxides, molybdenum disulfide and optionally sulfur are easily pressed into pellets, are rapid, stable and cool burners and give high purity cool nitrogen gas. The compositions are useful in applications such as automotive crash bag inflators and the like.

Abstract: Prepolymers having at least one functional group capable of absorbing actinic radiation resulting in electronic excitation of the molecule, leading to free radical type cure of systems containing these prepolymers and prepolymers capable of curing by a free radical mechanism are disclosed.