Abstract: Phenolic materials containing propargyl groups are prepared by reacting a polyhydric, phenolic material with propargyl bromide, the reaction being conducted in an aqueous sodium hydroxide solution. The products can be thermally polymerized to polymers which are useful as adhesives and as matrix resins in the fabrication of composites.

Abstract: A granular thermosetting novolak resin composition free from a tendency to release dust during handling and transformable into molded articles free from surface defects, is obtained by forming the composition into granules of from 2 to 9 mm in size, mixing said granules with 0.7-2.5 wt. % of a liquid mixture of acetone and polymers of alkyl esters of acrylic and methacrylic acids, and drying the thus impregnated granules.

Abstract: This invention is directed to low molecular weight, solid addition products having a softening point above 100.degree. F. and the method of preparing same and more particularly to the use of said addition products as crosslinking agents in various polymeric powder coatings, e.g. polyesters. The solid, low molecular weight products are derived from the addition reaction of at least one monohydroxy, single-ring aromatic carbon compound and hexakis (alkoxymethyl) amino-triazine.

Abstract: A process for producing a closed cell phenolic-resin foam material comprising a phenolic-resin polymer and a surfactant which is branched, non-ionic, with a hydroxyl value less than 50 achieved by capping excess hydroxyl groups; the material, and a structural laminate employing the material. The material has a thermal conductivity which is low initially and remains low for a long period of time.

Abstract: A resin for printing inks, prepared by the reaction of (A) a conjugated double bond-containing five-membered cyclic compound such as dicyclopentadiene, (B) a phenolic compound such as phenol, (C) an unsaturated carboxylic acid such as maleic anhydride and (D) a resol-type phenol resin obtained from phenol or an alkyl-substituted phenol and formaldehyde. In one embodiment, this invention relates to a process for the preparation of said resin for printing inks.

Abstract: A curable vinyl ester composition is prepared by the process wherein an organic hydroxy compound is reacted with a stoichiometric excess of an ethylenically unsaturated carboxylic acid and, after substantial completion of that esterification, reacting an oxirane compound with the unesterified carboxyl groups.

Abstract: Phenol-formaldehyde resoles and novalacs are cured at temperatures of from about 0.degree. C. to about 150.degree. C. and at pressures ranging from about atmospheric pressure to about 5 atmospheres to produce highly cross-linked resins when divinylbenzene is used as a cross-linking agent together with a minor amount of an acidic catalyst.

Abstract: The invention relates to organic polymers which can be crosslinked under the action of light and which are suitable for carrying out photomechanical processes. These polymers are photochemically considerably more sensitive than known comparable polymers and their sensitivity can additionally also be further increased by means of a combination with sensitizers. The molecular weight is at least 1,000. The polymers contain, as light-sensitive groups, groups of the formula I ##STR1## wherein R and R.sub.1 independently of one another denote alkyl groups with at most 4 C atoms, or R and R.sub.1 conjointly denote the remaining part of a 5-membered to 6-membered carbocyclic ring.