Heat-activatable, storage-stable polyurethane powders
One-part, room-temperature latent, curable isocyanate compositions
ApplicationNo. 06/514410 filed on 07/18/1983
US Classes:528/68, With organic compound reactant containing at least two NH, HNH or =NH groups and wherein the reactant composition is devoid of -C-XH, -C(=X)XH or anhydride264/302, Slush casting type264/304, Facilitating removal of article from form264/310, By rotation of material or material shaping member264/45.5, Autogenously formed surface layer or base supplies surface (e.g., skin forming, etc.)427/212, PARTICLES, FLAKES, OR GRANULES COATED OR ENCAPSULATED427/213.3, Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)428/403, Coated521/51, Processes of preparing a cellular product having an integral skin528/44, FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC.528/85With reactant containing at least two -XH groups
ExaminersPrimary: Cockeram, Herbert S.
Attorney, Agent or Firm
International ClassesC08G 18/80 (20060101)
C08G 18/70 (20060101)
C08G 18/08 (20060101)
C08G 18/00 (20060101)
Foreign Application Priority Data1982-08-18 DE
AbstractA process for the production of solid polyisocyanates stabilized by a polymer coating and showing retarded reactivity comprising reacting(1) one or more solid polyisocyanates in particulate form, said polyisocyanates having melting points above 30° C., and(2) from 0.1 to 25 equivalent percent of amine per isocyanate equivalent of an organic compound having a molecular weight of from 32 to 6000, said organic compound being selected from the group consisting of(a) di- or higher functional compounds containing 2 or more aliphatically-bound primary and/or secondary amino groups,(b) compounds containing one or more terminal --CO--, --NH--, --NH2 -- groups,(c) hydrazines, and(d) mixtures thereofsaid reaction being conducted at a temperature below the melting temperature of said solid polyisocyanate, and being conducted in the presence of(3) a liquid medium selected from the group consisting of(a) organic compounds containing one or more hydroxy groups and having molecular weights of from 62 to 6000,(b) organic compounds containing 2 or more aromatically-bound amino groups and having molecular weights of from 108 to 6000,(c) organic compounds containing 2 or more aliphatically-bound amino groups and having molecular weights of from 400 to 6000,(d) plasticizers,(e) water, and(f) mixtures thereofto form a suspension of polyadduct-coated, stabilized polyisocyanate in the liquid medium.
Field of SearchFROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC.
With organic compound reactant containing at least two NH, HNH or =NH groups and wherein the reactant composition is devoid of -C-XH, -C(=X)XH or anhydride
From at least one blocked -N=C=X group