摘要:
Aqueous dispersions of polyesters or alkyd resins for coatings are prepared by co-condensation of 10 to 100 mol-%, calculated on the sum of polybasic carboxylic acids, of polybasic acids whose carboxyl groups are attached to secondary and/or tertiary carbon atoms. Said dispersions are excellently stable and yield coatings with outstanding properties.
摘要:
An aqueous dispersion of an epoxide compound comprising water, one or more water-insoluble 1,2-epoxide compounds having mol weights Mn of from between 150 and 3000 and an emulsifying system comprising:(A) from 9.5 to 35% by weight of at least one polyester resin containing carboxyl groups having an acid number of from 10 to 50 mg KOH/g substance and a molecular weight Mn of from 400 to 4000, at least 30% of the carboxyl groups being neutralized;(B) from 0.5 to 25% by weight of at least one emulsifier having an HLB-value.gtoreq.15 and represented by the formula: ##STR1## wherein R.sup.1 represents a C.sub.1 -C.sub.16 -alkyl group,R.sup.2 represents H or a C.sub.1 -C.sub.16 -alkyl group,R.sup.3 represents H or methyl,n represents a number from 10 to 50;(C) from 40 to 90% by weight of at least one emulsifier having an HLB-value of 15 and the general formula: ##STR2## wherein R.sup.2 is previously defined, R.sup.4 represents C.sub.1 -C.sub.4 -alkyl group, x is a number of from 2 to 3, and m is a number from 15 to 100, the total of the percentage contents from A, B, and C being 100%.
摘要:
Melts of Urethane-modified oligoesters and 1 or polyesters can easily be dispersed in an aqueous phase in the presence of a dispersing agent combination comprising a polyether-modified polyester and a non-ionic dispersing agent having a particular HLB value.
摘要:
Stoving lacquer systems having a high solids content contain a binder consisting of carboxyl and hydroxyl group-containing polyester or alkyd resin including an .epsilon.-caprolactone as a "reactive diluent", and an aminoplast resin as a cross-linking agent.
摘要:
Non-aqueous polyester and alkyd resin stoving lacquers containing .epsilon.-caprolactam as a so-called reactive diluent with a high solids content and containing correspondingly small quantities of volatile solvents and yield excellently hard coatings which are not brittle.
摘要:
A molding composition having good surface gloss, high elongation at break and good thermoplastic processability is disclosed. The composition contains (A) a graft polymer that is obtained by free-radical polymerization of resin-forming vinyl monomers in the presence of rubber in latex form, (B) a copolymer of styrene and acrylonitrile and an optional (C) a resin selected from the group consisting of polycarbonates, polyester-carbonates, polyesters and polyamides. The preparation of the graft polymer is characterized in that (i) before the start of the grafting polymerization reaction the rubber latex is brought to a pH of 9 to 11, (ii) the redox initiator components are employed in amounts of 0.1 to 2.5 wt. % (based on the monomers metered in) and (iii) during the entire grafting polymerization reaction the pH remains constant±0.5 and in the range of 11.0 to 8.8, and (iv) the temperature difference between the start and end of the reaction is at least 10° C.
摘要:
Glass-fiber-reinforced ABS-molding compositions comprising(a) from 60 to 98% by weight of an ABS-plastic;(b) from 2 to 40% by weight of sized glass fiber; and(c) from 0 to 5% by weight of one or more additives,the glass fiber being treated with a size which contains a polymer containing epoxide groups and a copolymer of, on the one hand, styrene, nuclear-methylated styrene, .alpha.-methyl styrene, methylmethacrylate or a mixture thereof and, on the other hand, acrylonitrile.
摘要:
Copolymers of from 65 to 75%, by weight, of .alpha.-methyl styrene and from 35 to 25%, by weight, of .alpha.-methyl styrene and from 35 to 25%, by weight, of acrylonitrile, obtainable by radical emulsion polymerization, the monomers being metered in during the course of the polymerization, wherein the molar ratio: ##EQU1## of the unreacted monomers in the reaction mixture is maintained during the metering phase between 0.7 and 1.25.
摘要:
ABS-moulding compositions consisting of a thermoplastic copolymer and a graft polymer with rubber-like graft base exhibit an improved flame resistance if the total mixture contains a compound corresponding to the formulae ##STR1## polymerized into one or both components, wherein R.sub.1 represents C.sub.2 -C.sub.6 -alkylene,R.sub.2 represents hydrogen or methyl,R.sub.3 represents a direct bond or C.sub.1 -C.sub.4 -alkylene, andR.sub.4 represents hydrogen, methyl or CH.sub.2 --OOC--CH.sub.2 --CO--CH.sub.3.
摘要:
ABS-polycarbonate mixtures consisting of an aromatic polycarbonate A, a graft polymer B having a rubber-like graft base and optionally a thermoplastic copolymer C have improved flame resistance if the total mixture contains a compound corresponding to the formulae ##STR1## wherein R.sub.1 represents C.sub.2 -C.sub.6 alkylene,R.sub.2 represents hydrogen or methyl,R.sub.3 represents a direct bond or C.sub.1 -C.sub.4 alkylene, andR.sub.4 represents hydrogen, methyl orCH.sub.2 --OOC--CH.sub.2 --CO--CH.sub.3Polymerized in B or C or in B and C.