摘要:
A photographic element comprising a support having thereon at least one layer containing acid processed gelatin and a polymeric mordant containing a repeating unit represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents an alkyl group and the total number of carbon atoms in R.sub.1, R.sub.2 and R.sub.3 is 12 or more; and X.sup..crclbar. represents an anion.
摘要:
A photographic element comprising a support, a layer containing certain photographically useful fragments and a layer containing a dye mordant composition comprising a polymer having recurring units of the formula: ##STR1## wherein: A comprises polymerized units of ethylenically unsaturated monomers;R is H or alkyl;R.sup.1 is H, alkyl or is a group containing at least one atomatic nucleus;Q is a linking group;Y is H or an inert group;X is a leaving group;E and F are the atoms necessary to complete a 5-7 membered heterocyclic ring;n is 0 to 2;m is 1 to 3;p is 0 or 1;x is 0 to 90 weight percent; andy is 10 to 100 weight percent of the polymer.The polymeric mordants covalently bond with dyes or dye precursors and are especially useful in diffusion transfer processes.
摘要:
A suitable mordanting polymer for the image receiving layer in a color photographic material for the dye diffusion transfer process is a water-soluble cationic polymer containing glycidyl groups. Such polymers can be made by quaternizing a basic polyurethane, polyurea or polyurea polyurethane of the formula ##STR1## with a quaternizing agent capable of introducing glycidyl groups. The recurring unit contains a quaternizable tertiary amino group, and the recurring unit B is derived from a bis-chloroformate or a diisocyanate.
摘要:
Coating a solution comprising a hydrophilic colloid and ammonia over a receiving layer comprising polyvinylpyridine in an image-receiving element of a photographic film unit significantly reduces haze and facilitates the separation of the image-receiving element from the remainder of the film unit subsequent to diffusion transfer processing.
摘要:
This invention relates to the improvement of the rheological properties of asphalts in addition to the durability of asphalts by modification of the asphaltenes fraction and/or the maltenes fraction of an asphalt by adding thereto elastomers. This may be accomplished by adding either an n-pentane-soluble polymer or an n-petane-soluble polymer or an n-pentane-insoluble polymer or a mixture of the two.
摘要:
A fabric coating comprising a carboxylated butadiene acrylonitrile polymer alone or in combination with a butadiene acrylonitrile-styrene polymer, zinc oxide as a curing agent pigment and optionally a thickener is disclosed. A fabric thus coated has the appearance of leather, is waterproof, oil-proof and useful for wearing apparel.
摘要:
This invention is directed to strongly bonded composite materials and a process for preparing the same, such materials comprising (1) a resinous matrix containing (2) carbon fibers having a Young''s modulus parallel to the fiber axis of at least about 12 X 106 pounds per square inch and having a substantially continuous coating of amorphous carbon applied to the surface of such fibers prior to admixture with the resin matrix.
摘要:
Method for forming a bonded and flame retardant non-woven web of synthetic fibers by treating a web of non-woven synthetic fibers with a thermosetting aminoplast resin, cyanamide and phosphoric acid, and thereafter heating said web at an elevated temperature.
摘要:
This invention fills communication cables with a filling compound of petrolatum mixed with some polyethylene to prevent dripping at temperatures of 80*C and below. A rapid cooling of certain compounds from above the melting point changes the characteristics of the compound so as to bring the drip temperature to this value. An impregnator apparatus is supplied with metered quantities of the compound at a rate coordinated with the speed of travel of a cable through the impregnator apparatus; and the cable is impregnated with the water repellent compound in a solid though soft condition (as opposed to liquid), and with uniform results lengthwise of the cable. The cable itself acts as the impeller for the compound in the impregnator; and the impregnator is kept full under pressure by a pump with a by-pass.
摘要:
A substantially closed shell contains an air pervious liner defining an inner chamber for coating an article with thermoadhesive particles. Air flowing continuously through the liner toward the article in the chamber prevents buildup of the thermoadhesive particles on either the top or sides of the chamber. The chamber may be formed with a pair of openings to permit the entry and exit of pipe to be coated.