Abstract: A discrete device in which a capacitive and inductive function has been integrated is comprised of at least two insulated amorphous ribbons which are spirally wound to form a cylindrical toroid. Each of the amorphous metal ribbons is insulated from each other ribbon by a dielectric layer and wound in a stacked configuration to provide the capacitive function. Two conductive windings are then wrapped around segments of the cylindrical toroid to provide inductive and/or transforming functions as desired. A magnetic circuit is formed through the windings by the amorphous metal ribbons. A dielectric insulating layer between the ribbons is offset from the longitudinal edge of the ribbon so that the longitudinal edge of each ribbon is exposed. One ribbon has its longitudinal edge exposed on one surface of the toroid while another ribbon has its longitudinal edge exposed on the opposing surface of the toroid.

Abstract: A low-profile, high-frequency power transformer is comprised of a plurality of insulated ferrite slabs formed in a stacked array. In one embodiment a pair of slots are defined through the stacked array of insulated slabs. A single-turn metallic ribbon conductor is then looped through each pair of slots to form a corresponding first and second loop which are coupled in a magnetic flux circuit with each other through the stack. The distance separating one pair of slots is unequal to the distance separating the other pair of slots so that the loops formed by the ribbons have a corresponding unequal cross section. Hence the ratio of the voltages on the ribbons is proportional to the ratio of the respective cross-sectional areas of the ribbon loops. In another embodiment, a third ribbon is added having a cross-sectional loop area equivalent to the second ribbon to provide symmetrical, single-turn output coils.

Abstract: A discrete electromagnetic device in which the transformer/inductor function and a capacitive function are integrated is achieved by utilizing both the magnetic permeability and the dielectric constant of one or more soft ferrite layers. The device is comprised of a plurality of soft ferrite planar layers spaced apart in a stacked array. Between each soft ferrite layer is a metallic layer which forms one of the plates of the capacitor. A first and second set of apertures are defined through each of the planar ferrite layers. The first and second set of apertures are aligned among the plurality of ferrite layers so that a conductive element is led through one set of apertures to form a loop or coil. A similar conductive element or coil is led through the second set of apertures to form a second loop. The two loops thus serve as the secondary and primary of a transformer or alternatively as two inductors with the ferrite material acting as the magnetically permeable core.

Abstract: Disclosed are novel compositions capable of catalytically trimerizing organic isocyanates said compositions comprising solutions of the reaction products obtained by reacting in an inert solvent in substantially equimolar proportions electron-rich ketene-aminals with electron-poor olefins having the respective formulae (I) and (II) ##STR1## The variously substituted electron-rich ketene-aminals (I), as the name implies, have high electron density associated with the double bond because of the two tertiary amine groups while the electron-poor olefins (II) have the opposite situation due to the presence of electron withdrawing substituents R.sub.9 and R.sub.10.Also discosed is an improved process for trimerizing organic isocyanates using the above catalyst compositions including the preparation of polyisocyanurate polymers and isocyanurate-modified polyisocyanates.

Abstract: Disclosed are novel compositions capable of catalytically trimerizing organic isocyanates said compositions comprising solutions of the reaction products obtained by reacting in an inert solvent in substantially equimolar proportions electron-rich ketene-aminals with electron-poor olefins having the respective formulae (I) and (II) ##STR1## The variously substituted electron-rich ketene-aminals (I), as the name implies, have high electron density associated with the double bond because of the two tertiary amine groups while the electron-poor olefins (II) have the opposite situation due to the presence of electron withdrawing substituents R.sub.9 and R.sub.10.Also disclosed is an improved process for trimerizing organic isocyanates using the above catalyst compositions including the preparation of polyisocyanurate polymers and isocyanurate-modified polyisocyanates.

Abstract: Molded cellular polymers are disclosed which are derived from the reaction of organic polyisocyanates with novel active hydrogen compositions comprising (A) a polyester polyol mixture derived from (i) an aromatic polycarboxylic compound containing two or more carboxylic groups; and (ii) an excess of at least one polyol having from 2 to 8 hydroxyl groups and an equivalent weight of from about 30 to about 250; and (B) from about 5 to about 30 percent by weight of a primary or secondary amine terminated polyether of greater than 1500 molecular weight and amine functionality of from about 2 to about 8.The molded products are characterized by a combination of excellent impact strength and resistance to high temperatures as well as good resistance to burning.

Abstract: Disclosed is a process for reducing the acid content and thereby increasing the reactivity of a polymethylene polyphenylisocyanate which comprises contacting said polyisocyanate with an effective amount of a poly(N-vinylimidazole).

Abstract: Disclosed are novel compositions capable of catalytically trimerizing organic isocyanates said compositions comprising solutions of the reaction products obtained by reacting in an inert solvent in substantially equimolar proportions electron-rich ketene-aminals with electron-poor olefins having the respective formulae (I) and (II) ##STR1## The variously substituted electron-rich ketene-aminals (I), as the name implies, have high electron density associated with the double bond because of the two tertiary amine groups while the electron-poor olefins (II) have the opposite situation due to the presence of electron withdrawing substituents R.sub.9 and R.sub.10.Also disclosed is an improved process for trimerizing organic isocyanates using the above catalyst compositions including the preparation of polyisocyanurate polymers and isocyanurate-modified polyisocyanates.

Abstract: Disclosed is a novel class of amidinium salts having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 when taken individually are independently selected from lower-alkyl, aralkyl and cycloalkyl, and, when taken together with the respective nitrogen atoms to which they are attached, R.sub.1 together with R.sub.2, and R.sub.3 together with R.sub.4 independently represent heterocyclic groups having 5 to 7 ring atoms, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are independently selected from hydrogen, lower-alkyl, aryl, aralkyl, and cycloalkyl.The amidinium salts are very active catalysts for converting organic isocyanates to products containing isocyanurate and carbodiimide linkages.

Abstract: Disclosed is a novel class of amidinium salts having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 when taken individually are independently selected from lower-alkyl, aralkyl and cycloalkyl, and, when taken together with the respective nitrogen atoms to which they are attached, R.sub.1 together with R.sub.2, and R.sub.3 together with R.sub.4 independently represent heterocyclic groups having 5 to 7 ring atoms, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are independently selected from hydrogen, lower-alkyl, aryl, aralkyl, and cycloalkyl.The amidinium salts are very active catalysts for converting organic isocyanates to products containing isocyanurate and carbodiimide linkages.

Abstract: Polyamide-polyurea containing polymers are disclosed that are derived from the reaction of (A) an organic polyisocyanate; (B) an organic compound having at least two active hydrogen containing groups; and (C) about 15 to about 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) a particular enamine and (ii) an aromatic diamine and optionally (iii) an extender diol wherein the ratio of equivalents of (A) to total equivalents of (B) and (C) is within the range of about 0.90:1 to 1.10:1.The polymers find particular utility in the preparation of RIM parts having excellent physical properties. At the same time, the polymers are characterized by slower gel times than prior art aromatic diamine extended polymers thereby allowing the filling of larger molded parts.

Abstract: An improved process for the reaction injection molding of high flexural modulus polyurea containing elastomers is disclosed. Elastomers of this type when prepared at the prior art molding temperatures are brittle and can shatter like glass while still in the mold. The same elastomers when molded at a temperature of from about 90.degree. to about 220.degree. C. are not at all brittle. These elastomers are also characterized by the other advantageous properties inherent in polyurea elastomers such as high tensile strength, high hardness, and good heat resistance.The improved RIM process finds particular utility in the preparation of auto parts such as panels, engine hoods, and the like.

Abstract: Disclosed are novel compositions capable of catalytically trimerizing organic isocyanates said compositions comprising solutions of the reaction products obtained by reacting in an inert solvent in substantially equimolar proportions electron-rich ketene-aminals with electron-poor olefins having the respective formulae (I) and (II) ##STR1## The variously substituted electron-rich ketene-aminals (I), as the name implies, have high electron density associated with the double bond because of the two tertiary amine groups while the electron-poor olefins (II) have the opposite situation due to the presence of electron withdrawing substituents R.sub.9 and R.sub.10.Also disclosed is an improved process for trimerizing organic isocyanates using the above catalyst compositions including the preparation of polyisocyanurate polymers and isocyanurate-modified polyisocyanates.

Abstract: Disclosed is an improved process for the production of organic polyisocyanate based molded polymers prepared from at least one organic polyisocyanate and at least one polyol in the presence of an internal release agent wherein the improvement comprises employing as said agent a polysiloxane having at least one unit of the formula ##STR1## wherein R is selected from the group consisting of lower-alkyl and aryl, R.sup.1 is a divalent hydrocarbon radical, and R.sup.2 is selected from the group consisting of lower-alkoxy, aryloxy, particular hydroxyalkyleneoxy, alkoxyalkyleneoxy, amino, and hydroxyalkylamino radicals.The molding process can be repeated in many cycles before the molds require cleaning or treatment with release agent. The ease and rapidity with which the present process can be carried out makes it particularly suited to RIM production methods.

Abstract: Polyamide polyurethane polymers are disclosed that are derived from the reaction of (A) an organic polyisocyanate; (B) at least one organic polyol; and (C) a ketene-aminal having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4, when taken separately, are independently selected from the group consisting of lower alkyl, aralkyl, and cycloalkyl and, when taken together as R.sub.1 with R.sub.2 and R.sub.3 with R.sub.4 with the respective nitrogen atoms to which they are attached, represent independently heterocyclic groups having from 5 to 7 ring atoms, wherein the equivalent proportions of said polyol component (B) to said ketene-aminal component (C) fall within the range of about 1:4 to about 1:80 and the ratio of equivalents of said isocyanate to total equivalents of isocyanate reactive ingredients (B) plus (C) is within the range of about 0.95:1 to 6:1.

Abstract: Novel polyketene-aminal polyamides are disclosed which have the following recurring unit ##STR1## wherein R is a divalent hydrocarbon radical, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 when taken separately are independently selected from the group consisting of lower alkyl, aralkyl, and cycloalkyl, and when taken together as R.sub.1 with R.sub.2 and R.sub.3 with R.sub.4 with the respective nitrogen atoms to which they are attached represent independently a heterocyclic group having from 5 to 7 ring atoms.The polyamides are prepared by reacting together the appropriate diisocyanate [R(NCO).sub.2 ] and appropriate ketene-aminal to form the polymer directly without the evolution of any by-products or volatiles.The novel polymers are thermoplastic and can be formed or shaped using any of the techniques known to those skilled in the thermoplastic polymer art.