| 摘要 |
The invention relates to a process for preparing compounds containing isocyanate groups and cyclic carbonate structures, by reacting at least A) a monomeric diisocyanate with aliphatically, cycloaliphatically, araliphatically and/or aromatically bonded isocyanate groups with B) a hydroxy-functional cyclic carbonate, characterized in that component A) is reacted with component B) in an equivalents ratio of isocyanate groups to hydroxyl groups of at least 8:1. The invention further relates to the products obtainable by the process according to the invention, and to a composition comprising compounds containing isocyanate groups and cyclic carbonate structures. The invention additionally relates to the use of the products obtainable by the process according to the invention and of the composition as a starting component in the preparation of polyurethanes containing cyclic carbonate structures, crosslinkable binders, and also raw materials for coatings, sealants or adhesives. |
| 主权项 |
1. A composition comprising
a) a compound of the general formula (III) containing an isocyanate group and a cyclic carbonate structure, b) a compound of the general formula (IV) containing cyclic carbonate structures, and c) a monomeric diisocyanate having aliphatically, cycloaliphatically, araliphatically and/or aromatically bonded isocyanate groups, where, in the formulae (III) and (IV),
R is hydrogen or a saturated or unsaturated, linear or branched, aliphatic radical having 1 to 7 carbon atoms,X is a linear or branched organic radical which has 1 to 36 carbon atoms and which may optionally contain ether, ester and/or carbonate groups,n is 0 or 1 andY is a linear or branched, aliphatic or cycloaliphatic radical having 4 to 18 carbon atoms or an optionally substituted aromatic or araliphatic radical having 6 to 18 carbon atoms, wherein, based in each case on the total amount of components a) and b), component a) makes up a proportion of ≧88% by weight, and component b) a proportion of ≦12% by weight, and component c) is present to an extent of ≦1% by weight, in the overall composition. |
