Abstract: The new compounds consist essentially of ethylene oxide/propylene oxide block polymer units and oxyalkyleneated alkylphenol/aldehyde resin units, which are linked by methylene groups. They are prepared by reacting a block polymer of ethylene oxide and propylene oxide and an oxyalkyleneated alkylphenol/aldehyde resin with formaldehyde. The new compounds constitute especially advantageous breaking agents for petroleum.

Abstract: The invention is an improved hardener for use with phenolresorcinol-formaldehyde wood bonding adhesives. The hardener is conveniently made and shipped as a stable dry powdered material. It is then slurried in water at the point of use for convenience with continuously mixed and dispensed liquid-liquid, two part adhesive systems. The hardener comprises paraformaldehyde or alphapolyoxymethylene, fillers, viscosity and/or rheology control agents, and a solid acidic material. The latter ingredient is a critical component used to adjust the pH of an aqueous slurry to the range of 4.0 to 5.5. Oxalic acid is preferred. In this pH range, the formaldehyde polymers are stable and the slurried hardener does not give off significant formaldehyde odor for periods up to several days. Bonding performance is improved because the characteristics of the hardener and resulting adhesive have very little variation over time.

Abstract: The present invention relates to varnishes for use in the preparation of glasscloth laminates, methods of their production and laminates made therefrom.The varnish is made by dissolving 100 parts of a TFP resin having a number average molecular weight of about 1000 and an oxygen content of about 8% in 60 to 65 parts of butan-2-one or isopropanol. 8 to 12 parts of hexamine are dissolved in a minimum quantity of a solvent comprising water and IMS in a ratio of about 3:5. The two solutions are thoroughly mixed and filtered to produce the varnish.The varnish is used to prepare glasscloth laminates for use as printed circuit boards.

Abstract: A process for the preparation of synthetic resins based on resorcinol compounds which comprises reacting a resorcinol pitch which is obtained in the manufacture of resorcinol from benzenedisulfonic acid in at least one step with an oxo-compound selected from aldehydes, ketones and compounds based on or splitting off at least one of these substances, and the use of the products as binders for abrasive articles.

Abstract: A high-molecular-weight novolak type substituted phenolic resin having a number average molecular weight of at least 1500 is prepared by reacting (A) (i) a phenol comprised mainly of a bifunctional phenol or (ii) a low-molecular-weight novolak type substituted phenolic resin derived from this phenol and an aldehyde with (B) a chain extender selected from the group consisting of (i) a dimethylolated product of a bifunctional or trifunctional phenol, (ii) a low-molecular-weight resol type substituted phenolic resin derived from a phenol comprised mainly of a bifunctional phenol and an aldehyde, (iii) an aldehyde, (iv) a ketone, (v) a diol and (vi) a dihalide in the presence of an acid catalyst, with the proviso that if the reactant (A) is the phenol (i), the chain extender is the resol type substituted phenolic resin (ii).

Abstract: A process for preparing a resin containing phenolic groups, in which an aralkylene ether of formula ROCH.sub.2.Ar. CH.sub.2 OR, wherein Ar represents a phenylene group and R is an alkyl group of 1-4 carbon atoms, is reacted with a phenol containing 1-3 hydroxyl groups and at least 2 hydrogen atoms in the aromatic phenolic nucleus, wherein (1) an ether composition which comprises at least 50 molar % e.g. 50-100% of said ether and the remainder of said composition, if any i.e. up to 50% (such as 0.1-50%) is selected from aromatic compounds each with an Ar nucleus having two substituents selected from CH.sub.3, CH.sub.2 OR, CHO, CH(OR).sub.2, said phenol and (2) an added compound of formula R'CHO or R'CH (OR.sup.2).sub.2, wherein R' is monovalent phenyl group or substituted phenyl group, in which each substituent is an alkyl group of 1-4 carbon atoms or a chlorine atom, and R.sup.

Abstract: Concentrated boric anhydride solutions containing more than 5% of boric anhydride in an organic solvent selected from mono or polyalcohols, trialkylborate and/or dialkylacetal when the solvent also contains an acid selected from sulfuric acid and/or aromatic acids. These solutions are used as hardeners of formo-phenolic resols, more particularly for the manufacture of laminates comprising glass fibers and formo-phenolic resols.

Abstract: Condensation products which are obtained by reaction of aromatic hydroxycarboxylic acids with formaldehyde in a first stage and by a subsequent condensation reaction of the products with phenol and/or phenol derivatives in the molar ratio 1:(0.8-21):(0.6-20) are suitable as fixing agents for basic dyestuffs in paper printing.

Abstract: Phenolic novolak resins are described which are structurally characterized as having from about 55% to about 90% of the available theoretical paraphenyl linkages in the resin chain bridged to a phenyl group. The resin compositions of this invention provide extended resin stability at relatively low temperatures without significant adverse affect on the cure speed at the molding temperature. The resins are especially suited for use in runnerless injection or cold manifold molding processes, but can also be used in transfer, compression and injection molding processes.

Abstract: Phenolic novolak resins are described which provide extended resin stability at relatively low temperatures without significant adverse affect on the cure speed at the molding temperature. The resins are especially suited for use in runnerless injection or cold manifold molding processes, but can also be used in transfer, compression and injection molding processes.

Abstract: Phenolic novolak resins are described which are structurally characterized as having from about 55% to about 90% of the available theoretical paraphenyl linkages in the resin chain bridged to a phenyl group. The resin compositions of this invention provide extended resin stability at relatively low temperatures without significant adverse affect on the cure speed at the molding temperature. The resins are especially suited for use in runnerless injection or cold manifold molding processes, but can also be used in transfer, compression and injection molding processes.

Abstract: Infusible cured phenolic resin fibers of the present invention have a birefringence of at least 2.times.10.sup.-3 with the x-ray diffraction pattern of the fibers showing an amorphous halo. The tenacity of infusible cured phenolic resin fibers is significantly increased by subjecting the fibers to sufficient longitudinal tension as to cause at least about 30% elongation of the fibers. The Young's modulus of elasticity of the fibers is also significantly increased thereby. Preferably the resulting stretched infusible cured phenolic resin fibers have a tenacity of at least about 4 g./den.

Abstract: A resin for coating sand and a resin-coated sand produced therefrom wherein the resin is prepared by incorporating furan into a phenolic novolak resin. In the preferred practice, the resin is produced by reaction of furfuryl alcohol with a phenolic compound at an acid pH to give a furfuryl-phenolic intermediate in a first step, and then, in a second step, reacting the furfuryl-phenolic intermediate with a lower aliphatic aldehyde to produce the resin. The resin-coated sands of the present invention provide unexpectedly improved shakeout and collapsibility characteristics in the shell process.

Abstract: For the production of a powder-like furan resin use is made of a mixture of a ketone pertaining to the furan series, phenol-formaldehyde resin and, if desired, furfurol taken in a weight ratio of 10:3- 15:2-5 respectively. The mixture of said components is heated to a temperature within the range of from 130.degree. to 200.degree. C., whereupon the desired product is formed. The process may be conducted in the presence of a catalyst comprising a mixture of tin dichloride and hexamethylene diamine.The resulting powder-like furna resin is resistant against highly-aggressive media at a temperature of up to 120.degree. C.; it is also resistant against the effect of oxidizing agents at a temperature of up to 80.degree. C. Martens yield temperature of the powder-like furna resin of the present invention is as high as 300.degree. C. The resin yield is as high as 93%.