Abstract: A method of accelerating tests for the delayed failure of coatings and coated substrates caused by degradation is provided wherein the coated substrate is subjected to a controlled level of strain during testing.

Abstract: A method of manipulating the rate of homogeneous nucleation of silicon as either a particulate solid or liquid settling out of the gaseous phase during the pyrolysis of silane homologs by controlling the quantity of halogen within the pyrolysis medium. The rate of homogeneous nucleation can be maintained sufficiently low (below 1 silicon nucleus/cm.sup.3 /sec) so as to avoid power formation with a minimum amount of halogen.

Abstract: This invention relates to an improved interfacial polycondensation aromatic polycarbonate process which does not require large quantities of strong base to provide a particulate product. The process is specific to interfacial polycondensation processes wherein the polycarbonate is formed in the aqueous phase by using a low organic to aqueous phase volume ratio. The quantity of strong base required to provide a particular product is reduced by adding the aromatic dihydroxy compound to the reaction mixture in small increments. This maintains a high mole ratio of strong base to aromatic dihydroxy compound during reaction.

Abstract: A method is provided for selectively depositing tungsten metal at thicknesses over 1000 angstroms or more on silicon and other conductor and semiconductor surfaces, wherein a substrate containing such surfaces is exposed to a chlorine or bromine containing solution to prevent deposition of tungsten on the insulator surfaces.

Abstract: A method is provided for separating alkylated phenols based on differences in their dissociation constants without the consumption of neutralizing acid or base. This is accomplished by selectively reacting the mixed alkylated phenol having the having dissociation constant to the salt form and isolating the salts from the mixture in an aqueous solution. The alkylated phenols are then recovered from the aqueous solution in unreacted form with an organic solvent. Essentially all solvents and solutions can be recycled.

Abstract: A method is provided for producing thermoplastic polymer blends with the exposure of blend constituents to extreme blending conditions minimized by melting the thermoplastic polymers and adjusting their viscosity and elasticity values, through control of their melt temperatures, prior to blending. Where the viscosity and elasticity values are adjusted properly, the desired thermoplastic polymer blend can be produced with a minimum effort.

Abstract: Selective catalytic steam dealkylation of ortho- and para-positions of alkylated phenols is accomplished by reacting ortho- and/or para-alkylated phenols with steam in the presence of a catalyst comprised of magnesium oxide, optionally manganese oxide and optionally an organic binder; said reaction may preferably takes place in the presence of an oxidizing atmosphere to extend catalyst life. High degrees of conversion are obtained without loss of the hydroxyl radical of the alkylated phenols.

Abstract: Selective catalytic steam dealkylation of ortho- and para-positions of alkylated phenols is accomplished by reacting ortho- and/or para-alkylated phenols with steam in the presence of a catalyst comprised of zinc oxide, optionally manganese oxide and optionally an organic binder and preferably an oxidizing atmosphere. High degrees of conversion are obtained without loss of the hydroxyl group of the alkylated phenols.

Abstract: A method for producing high yields of aryl substituted esters of the formula ##STR1## by reacting sterically hindered phenols with a stoichiometric excess of an olefinic ester in the presence of a base catalyst at a temperature in the range of 150.degree. to 250.degree. C.

Abstract: This invention is directed to a method of purifying crude bisphenol-A by crystallization with agitation in phenolic water having less than 30 weight percent phenol. The crystals obtained have a morphology similar to that of aqueous crystallized bisphenol-A with a significantly higher degree of purity than crystals obtained from an aqueous crystallization. The use of an organic solvent, foreign to the bisphenol-A synthesis reaction, for either washing or crystallization can be avoided and only small quantities of phenol and water are required when providing pure bisphenol-A for polycarbonate synthesis by this process.

Abstract: Siloxane polymers containing zwitterions on tertiary silicone atoms and their aminoalkyl siloxane polymer intermediates are provided. Methods of their production are also provided. The aminoalkyl siloxane polymer intermediates and the zwitterionic siloxane polymers are obtained by co-polymerizing trifunctional aminoalkyl silanes or zwitterionic silanes, respectively, with hydroxy-terminated siloxane oligomers in the presence of an acid catalyst. The aminoalkyl siloxane polymer intermediates are converted to zwitterionic siloxane polymer by reaction with an organosultone or an organolactone. Trifunctional aminoalkyl silanes are readily available and utilizing these silanes provides an economical route to obtaining zwitterionic siloxane polymers.

Abstract: Zwitterionic siloxane polymers containing tertiary silicone atoms with zwitterions and their aminoalkyl siloxane polymer intermediates production are provided. Methods of their production are also provided. The aminoalkyl siloxane polymer intermediates and the zwitterionic siloxane polymers are obtained by co-polymerizing trifunctional aminoalkyl silanes or zwitterionic silanes, respectively, with hydroxy-terminated siloxane oligomers in the presence of an acid catalyst. The aminoalkyl siloxane polymer intermediates are converted to zwitterionic siloxane polymer by reaction with an organosultone or an organolactone. Trifunctional aminoalkyl silanes are readily available and utilizing these silanes provides an economical route to obtaining zwitterionic siloxane polymers.

Abstract: This invention relates to a catalyzed interfacial polycondensation aromatic polycarbonate process which comprises forming an agitated two-phase mixture comprising an organic solvent phase with catalyst and an aqueous phase containing an aromatic dihydroxy compound, a base and an ionic surfactant. A carbonyl halide is added to the mixture and reacted with the aromatic dihydroxy compound to form an aromatic polycarbonate. The aromatic polycarbonate is recovered from the aqueous phase.

Abstract: A method for purifying water-crystallized bisphenol-A involving treatment with an aqueous alkaline solution. The concentration of base preferably ranges from 0.1 to 25 weight percent of crude bisphenol-A. The crude bisphenol-A is a solid and preferably at a temperature in the range of about 10.degree. to 80.degree. C.

Abstract: A method is provided for producing 2,3,6 trimethylphenol by rearrangement of 2,4,6 trimethylphenol in the presence of an aluminum based catalyst, such as AlCl.sub.3, and an acid upon heating the mixture to a temperature within the range of 80.degree. C. to 150.degree. C.

Abstract: A method for making diarylthioethers including thioetherbis(phthalic anhydrides) and thioetherbis(phthalimides) in the absence of a solvent medium by the interaction of sulfide compounds, including alkali metal sulfides and alkali metal hydrogen sulfides, with molten organo-substituted aromatic compounds including phthalic anhydrides and phthalimides mediated by a phase transfer catalyst.

Abstract: A method of upgrading silicon resin coating compositions is provided wherein the coating compositions are filtered prior to application on a substrate. The filters utilized are 5 microns or less.

Abstract: A method is provided for producing aminoalkyl-siloxane polymers of a high molecular weight by hydrolyzing a difunctional aminoalkyl-silane prior to incorporation into the siloxane polymer. The high molecular weight siloxane polymers obtained may be converted to zwitterionic siloxane rubbers with excellent engineering properties and integrity.

Abstract: Linear, branched and/or cross-linked block copolymers of poylphenylene oxide and polystyrene obtained using phosphoryl coupling agents is disclosed.

Abstract: A method is provided wherein ionically cross-linked zwitterionic siloxane polymers are solubilized by the addition of a weak base to a combination of the zwitterionic siloxane polymers and an organic solvent. Where a weak base having a high vapor pressure is utilized, the zwitterionic siloxane polymers can be recured by evaporation of the organic solvent and base.