摘要:
A crosslinked polyurethane polyurea spherically particulate polymer having an average particle diameter of 0.1 to 500 .mu.m, wherein the polymer molecule contains an isocyanurate ring in an amount of 10 to 30% by weight is disclosed. A process for producing the crosslinked polyurethane polyurea spherically particulate polymer is also disclosed. The process comprises the steps of: reacting an isocyanurate ring-containing polyisocyanate compound with a polyhydroxy compound to form an organic phase capable of forming a three-dimensional crosslinked structure due to the reaction, wherein the amount of isocyanate groups in the polyisocyanate compound is stoichiometrically larger than that of hydroxyl groups in the polyhydroxy compound; finely dispersing the organic phase into water; and adding a polyamine to the dispersion to make interfacial polymerization between the organic phase and the polyamine and a polyurethane-forming reaction within particles, wherein the amount of the polyamine is stoichiometrically equivalent to or smaller than the stoichiometrical excess of isocyanate groups. The particulate polymer is excellent in solvent resistance and has a completely spherical shape without wrinkle on the particle surface. The particulate polymer has a good toughness and mechanical properties. Further, the particulate polymer has no reactive isocyanate group in the polymer molecule.
摘要:
Finely dispersed polyurethane polyurea crosslinked particles having an average particle diameter of not greater than 1 .mu.m and essentially comprising (A) an ion-forming polyol, (B) a polyisocyanate, and (C) a polyamine; and a process for producing the same are disclosed. The present invention provides finely dispersed polyurethane polyurea crosslinked particles and a process for producing the same; the dispersed particles being firmly crosslinked and having an average particle diameter of not greater than 1 .mu.m, and the particle dispersion having high preservation stability, preventing the core substance, if encapsulated therein, from undergoing denaturation, and exhibiting per se film-forming properties to provide a film excellent in water resistance, solvent resistance and chemical resistance.
摘要:
A process for producing a polyisocyanate containing an isocyanurate ring, which comprises reacting at least one diisocyanate compound selected from the group consisting of alkylene diisocyanates, cycloalkylene diisocyanates and aralkylene diisocyanates with a diol having a molecular weight of 100 to 1,000 and containing at least 3 hydrocarbon substituents per molecule in the presence of an isocyanurating catalyst. A resin composition for urethane paints comprising the polyisocyanate as an essential ingredient.
摘要:
A process for producing a polyisocyanate containing an isocyanurate ring which comprises reacting at least one diisocyanate compound selected from the group consisting of alkylene diisocyanates, cycloalkylene diisocyanates and aralkylene diisocyanates with a cycloalkylene diol in the presence of an isocyanurating catalyst; and a resin composition for use in non-yellowing fast-drying urethane paints, comprising (A) the aforesaid polyisocyanate and (B) an acrylic polyol having a number average molecular weight of 2,000 to 30,000 and a hydroxyl value of 20 to 200.
摘要:
An urethane coating resin composition comprising as essential components (A) an isocyanurate-type polyisocyanate derived from hexamethylene diisocyanate and containing at least 65% by weight of a mononuclear compound and (B) an acrylic polyol having a number-average molecular weight of 5,000 to 25,000 and a hydroxyl value of 40 to 160.
摘要:
A resin composition comprising (A) a polyisocyanate having an isocyanurate ring obtained by reacting at least one diisocyanate selected from alkylene diisocyanates, cycloalkylene diisocyanates and aralkylene diisocyanates with a diol having 10 to 40 carbon atoms or with a polyester polyol containing 12-hydroexystearic acid as an essential component in the presence of an isocyanuration catalyst, and (B) a nonpolar organic solvent. The composition is useful, for example, as a point, an adhesive or a molding material.
摘要:
Disclosed is a process for preparing isocyanurate-type polyisocyanates characterized by reacting an aliphatic or alicyclic diisocyanate compound comprising hexamethylene diisocyanate as a major component in the presence of an isocyanuration catalyst represented by general formula [I], ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent a hydrocarbon group containing 1 to 20 carbon atoms, or a hydrocarbon group containing one or more hetero atoms; at least two of R.sup.1, R.sup.2 and R.sup.3 may be linked to each other; R.sup.4 indicates a hydrogen atom or a hydrocarbon group containing 1 to 20 carbon atoms; and R.sup.5, R.sup.6 and R.sup.7 independently represent a hydrocarbon group containing 1 to 20 carbon atoms. Diol-modified isocyanurate-type polyisocyanates can be prepared additionally using a hydrocarbon diol in the process.
摘要:
Disclosed is a construction material containing bitumen comprising (A) a polyol component, the polyol component consisting essentially of (a-1) a hydroxy-polyoxyalkylene ether of bisphenol A and/or bisphenol F, and (a-2) an aliphatic polyol, (B) a polyisocyanate component, (C) a bitumen, and/or (D) an aggregate. The construction material has improved water-proof and mechanical properties.
摘要:
A working material for construction or repair comprising (A) a mixture of 0.5 to 30% by weight of (a-1) a hydroxide of a divalent or higher basic metal, 10 to 99% by weight of (a-2) an aggregate and 0.5 to 70% of (a-3) a bituminous substance, the total amount of these materials (a-1), (a-2) and (a-3) being 100% by weight, and covering the mixture (A), (C) oxidized rosin or a mixture of (C) oxidized rosin with (D) a compound containing more than one carboxy group per molecule on an average and/or (B) a liquid hydrocarbon or a vegetable oil.
摘要:
An epoxy resin composition is provided consisting essentially of(a) an epoxy compound having at least two epoxy groups in each of its molecules,(b) an ester of a mercaptoalkylcarboxylic acid having on an average more than two thiol groups in each of its molecules and in which the number of carbon atoms of the alkylene groups between the ester groups and the thiol groups is in excess of one on an average, and(c) a tertiary amine-type curing accelerator.This resin composition is used for new construction or repairs either as such or in the form of a construction material obtained by mixing this composition with aggregates and optionally with additives.