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US 6,686,416 B2Granted
Storage-stable isocyanate dispersions
AssigneeJowat Lobers und Frank GmbH & Co. KG
InventorsDieter Guse, Theodor Hippold, Christian Terfloth
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Abstract
Disclosed is a storage-stable, essentially aqueous one component dispersion, of a deactivated isocyanate and a isocyanate-reactive polymer which cross-links at low temperatures.
Drawings
Claims40
An aqueous one component dispersion comprising:
- (a) at least one surface-deactivated or encapsulated solid isocyanate wherein the deactivating agent comprises one or more primary and/or secondary amino groups and wherein the degree of deactivation, calculated as the equivalent ratio of amino groups to isocyanate groups, is between 0.009:1.0 and 0.05:1.0;
- and
- (b) at least one polymer reactive with isocyanate.
An essentially aqueous one component dispersion, storage-stable at room temperature, comprising:
- (a) 0.1 to 10 wt. % calculated as NCO content, of at least one surface-deactivated or encapsulated solid isocyanate which was been deactivated with a low-molecular deactivating agent having a molecular weight of less than, or equal to, 200 g/mol wherein the deactivating agent comprises one or more primary and/or secondary amino groups and wherein the degree of deactivation DD, calculated as the equivalent ratio of amino groups to isocyanate groups NNH2/NNCO, is in a range of
- 0.009:1<DD<0.05:1.0;
- (b) 5 to 75 wt. %, based on the total weight of the dispersion, of at least one polymer reactive with isocyanate,
- wherein a film or layer formed from the dispersion is cross-linkable during and/or after the removal of water at a temperature of from 5° C. to 40° C.
1 more element
An essentially aqueous one component dispersion, storage-stable at room temperature, comprising:
- (a) 0.1 to 10 wt. % calculated as NCO content, of at least one surface-deactivated or encapsulated solid isocyanate, said isocyanate selected from the group consisting of toluylene diisocyanate urethdione (TDI urethdione), toluylene diisocyanate urea (TDI urea) and 4,4′-methylene di(phenyl isocyanate) (MD) and deactivated with a low-molecular deactivating agent having a molecular weight of less than, or equal to, 200 g/mol, wherein the deactivating agent comprises one or more primary and/or secondary amino groups and wherein the degree of deactivation DD, calculated as the equivalent ratio of amino groups to isocyanate groups NNH2/NNCO, is in a range of
- 0.009:1.0<DD<0.05:1.0;
- (b) 5 to 75 wt. %, based on the total weight of the dispersion, of at least one polymer reactive with isocyanate, said polymer selected from the group consisting of homopolymers, copolymyers or their mixtures which have isocyante-reactive functional groups.
Dependencies are inferred from the claim text.