Hoechst Aktiengesellschaft

Heinz Schmelzer

Richard Sattelmeyer

Gerhard Werner

Manfred Kuechler

Claus Godau

Manfred Marten

Richard Gutte

Erich Schunck

Walter Vost

Peter Grafe

Holt melt adhesive compositions having longer pot lives and comprising adhesive thermoplastic compositions having high cohesion and low flowability based on copolymers A) composed of ethylenically unsaturated monomers containing chelating metal compounds B) and, if desired, other conventional additives C), these hot melt adhesive compositions additionally containing an alkylphenolic resin or an arylphenolic resin in amounts of up to 20% by weight, relative to copolymer A), as crosslinking regulator in order to extend the pot life and to improve their processibility like a thermoplastic, and processes for preparing hot melt adhesive compositions by mixing the starting components.

Hot melt adhesives having improved pot lives and processes for their

Hot melt adhesive compositions having longer pot lives and comprising adhesive thermoplastic compositions having high cohesion and low flowability based on copolymers A) composed of ethylenically unsaturated monomers containing chelating metal compounds B) and, if desired, other conventional additives C), these hot melt adhesive compositions additionally containing an alkylphenolic resin or an arylphenolic resin in amounts of up to 20% by weight, relative to copolymer A), as crosslinking regulator in order to extend the pot life and to improve their processibility like a thermoplastic, and processes for preparing hot melt adhesive compositions by mixing the starting components.

Fibrous material, in particular shoddy from synthetic fiber wastes, can be compacted into thermally and acoustically insulating boards and moldings by mixing with a pulverulent adhesive comprising a hot-melt adhesive and a solid epoxy resin/curing agent system and heating the mixture under pressure in a mold to a temperature at which the hot-melt adhesive becomes liquid and the epoxy resin reacts with its curing agent.

Process for preparing moldings by compacting and simultaneously bonding

Use of polyamidoamines as curing agents for epoxy resins and curable mixtures containing these substances. The invention relates to the use of polyamidoamines (A) containing primary and/or secondary amino groups as curing agents for epoxy-containing compounds (B), wherein the polyamidoamines (A) used are those compounds which have been obtained by polycondensation of (a) compounds from the group of dicarboxylic acids containing oxyalkylene groups, or derivatives thereof (esters), with (b) polyamines containing at least two amino groups which are condensable with (a). The invention furthermore relates to curable mixtures containing the abovementioned components (A) and (B). The cured products obtainable according to the invention have advantages with regard to impact strength and shock resistance, to flexibility even at relatively low temperatures and crack-bridging properties.

Use of polyamidoamines as curing agents for epoxy resins and curable

Thermoplastic composition having high cohesion and a reduced tendency to flow, based on a copolymer of ethylenically unsaturated monomers obtained by conventional methods in the presence of polymerization initiators and a chelating agent based on

Thermoplastic composition of acrylic copolymers and crosslinking agents

An adhesive binding agent based on at least one polymer of dicyclopentadiene and at least one aromatic hydrocarbon wherein the polymer comprises from 40 to 80% by weight of cyclopentadiene units and from 20 to 60% by weight of at least one aromatic hydrocarbon having a boiling point in the range from 110.degree. to 220.degree. C., selected from the group consisting of alkylaromatic hydrocarbons and tetrahydronaphthalene, said polymers having a mean molecular weight of from 300 to 5000, an iodine number (measured according to DIN Standard 53241, part 2) of from 0 to 60, and a melting point in the range of from 30.degree. to 150.degree. C., and an adhesive containing said binding agent in combination with a rubber or an ethylene-vinylacetate copolymer.

Adhesive binding agents and adhesives containing them

An adhesive composition based on I. 100 parts by weight of a block copolymer with at least two polymer blocks (A) and at least one polymer block (B), wherein the polymer blocks (A) comprise non-elastomeric blocks with an average molecular weight of from 2000 to 125,000 derived from an aromatic hydrocarbon substituted by one of the groups consisting of the members monoalkenyl and monoalkylidene and wherein not more than 25% of the original double bonds are hydrogenated, and polymer block (B) is an elastomeric block with an average molecular weight of from 10,000 to 250,000 derived from a conjugated diene, wherein at least 75% of the aliphatic unsaturated bonds are hydrogenated; Ii. 10 to 200 parts by weight of at least one cohesion-increasing resin selected from the group consisting of an alkylphenol resin, an arylphenol resin, a phenol-colophony-adduct and a rosin-modified phenol resin; The components dissolved in at least one solvent and a process of bonding one substrate to another substrate which comprises applying to the surface of either substrate an adhesive composition as claimed in claim 1 and placing the surfaces to be bonded together.

Adhesive compositions

A process for the preparation of a hydrocarbon resin which comprises polymerizing a mixture of (a) from 30 to 90% by weight of a dicyclopentadiene component comprising dicyclopentadiene and up to 30% by weight of an at most dialkylated dicyclopentadiene having from 1 to 4 carbon atoms in each alkyl substituent and (b) from 10 to 70% by weight of an aliphatic olefin containing 8 carbon atoms in the presence of a Friedel-Crafts catalyst and a solvent at a temperature of from 30.degree. to 140.degree. C wherein the polymer obtained is isolated as such or subsequently hydrogenated, and hydrocarbon resins prepared according to said process.

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Rummelsheim, Germany

Heinz Schmelzer