摘要:
The present invention relates to hyperbranched polyaspartate esters containing repeating structural units corresponding to the formula I and/or II ##STR1## The present invention also relates to a process for the preparation of these hyperbranched polyaspartate esters by self condensing, via a transesterification reaction, at least a portion of the hydroxy and ester groups of the hydroxy aspartates corresponding to the above formula at a temperature of 60.degree. to 240.degree. C. to form hyperbranched polyaspartate esters and eliminating alcohols having the formula R.sub.1 --OH and/or R.sub.2 --OH.
摘要:
The present invention relates to hydroxy-functional polyhydantoin prepolymers corresponding to the formula ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from an organic monomeric diisocyanate, a polyisocyanate adduct or an NCO prepolymer containing hydantoin groups, R.sub.2 represents an organic group which is inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.3 and R.sub.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.5 represents the hydrocarbon radical obtained by removing the amino and hydroxyl groups from an amino alcohol, n has a value of 1 to 3 and m has a value of 2 to 6. The present invention is also directed to compositions suitable for the production of coatings, adhesives or elastomers containing these polyhydantoin prepolymers in combination with optionally blocked polyisocyanates or aminoplast resins.
摘要翻译:本发明涉及对应于式(I)的羟基官能聚乙内酰脲预聚物,其中R表示通过从有机单体二异氰酸酯除去异氰酸酯基团,多异氰酸酯加合物或含有乙内酰脲基团的NCO预聚物得到的残基,R2表示 在100℃或更低的温度下对异氰酸酯基团呈惰性的有机基团可以相同或不同,表示在100℃或更低的温度下对异氰酸酯基团呈惰性的氢或有机基团 R 5表示通过从氨基醇除去氨基和羟基而得到的烃基,n表示1〜3的数值,m表示2〜6的数。本发明还涉及适用于生产 包含这些聚乙内酰脲预聚物与任选封闭的多异氰酸酯或氨基塑料树脂组合的涂料,粘合剂或弹性体。
摘要:
The present invention relates to aspartate-functional hydantoin prepolymers prepared by reacting a polyisocyanate having a functionality of at least 1.8 with a polyaspartate corresponding to the formula ##STR1## wherein X represents an organic group which has a valency of n and is inert towards isocyanate groups at a temperature of 100.degree. C. or less, andR.sub.1 and R.sub.2 may be the same or different and represent optionally substituted hydrocarbon radicals,R.sub.3 and R.sub.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less andn has a value of 2 to 6, preferably 2 to 4 and more preferably 2.The present invention is also directed to compositions suitable for the production of coatings, adhesives, elastomers, potting compounds or composite matrices containing these polyhydantoin prepolymers in combination with optionally blocked polyisocyanates.
摘要:
The present invention relates to hydroxy-functional prepolymers containing urea groups and corresponding to the formula ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from an organic monomeric diisocyanate, a polyisocyanate adduct or an NCO prepolymer containing hydantoin groups or hydantoin group precursors, R.sub.1 and R.sub.2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.3 and R.sub.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, R.sub.5 represents the hydrocarbon radical obtained by removing the amino and hydroxyl groups from an amino alcohol, n has a value of 1 to 3 and m has a value of 2 to 6.The present invention is also directed to compositions suitable for the production of coatings, adhesives or elastomers containing these polyhydantoin prepolymers in combination with optionally blocked polyisocyanates or aminoplast resins.
摘要:
The present invention relates to aqueous dispersions of polyurethanes containing hydantoin groups (calculated as C.sub.3 N.sub.2 O.sub.2, MW 96) in an amount of 1 to 40% by weight, based on resin solids. The present invention also relates to the use of these dispersions for preparing coatings with excellent hydrolytic and thermal stability.
摘要翻译:本发明涉及基于树脂固体含有1至40重量%量的乙内酰脲基团(按C 3 N 2 O 2,MW 96计算)的聚氨酯水分散体。 本发明还涉及这些分散体用于制备具有优异的水解和热稳定性的涂料的用途。
摘要:
The present invention relates to aqueous dispersions of polyureas containing hydantoin groups (calculated as C.sub.3 N.sub.2 O.sub.2, MW 96) in an amount of 1 to 40% by weight, based on resin solids. The present invention also relates to the use of these dispersions for preparing coatings having excellent hydrolytic and thermal stability.
摘要翻译:本发明涉及基于树脂固体含量为1至40重量%的含有乙内酰脲基团(按C 3 N 2 O 2,MW 96计算)的聚脲的水分散体。 本发明还涉及这些分散体用于制备具有优异的水解和热稳定性的涂料的用途。
摘要:
The invention is directed to a process for preparing SRIM molded article. The process broadly requires the use of a fiber reinforcement mat which is placed inside the mold cavity, and then a polyurethane reaction system is injected into the mold. The system comprising a polyisocyanate and a blend of active hydrogen containing compounds requires aldimines as part of the blend of active hydrogen containing compounds.
摘要:
The invention relates to a thermoreversible process for the preparation of a hydantoin comprisng(a) reacting an unsaturated polyester with a monofunctional amine to yield a poly(ester aspartate), and(b) reacting said poly(ester aspartate) with an isocyanate to produce a poly(ester urea), and(c) heating said poly(ester urea) to form a hydantoin compound.The process is useful for the preparation of coatings.
摘要:
The present invention relates to heat-curable, cyclic isocyanate addition products i) which are the reaction products of a polyisocyanate having two or more isocyanate groups with a compound containing two or more isocyanate-reactive groups and ii) in which at least 10% by weight of the reaction products are in the form of cyclic groups containing urea and/or urethane groups. The present invention also relates to a process for the preparation of these cyclic isocyanate addition products and to the products obtained by curing these compositions at elevated temperatures, e.g., coatings, adhesives, molded articles, elastomers and foams.
摘要:
The present invention relates to a coating composition for the preparation of a polyurea coating which containsa) a polyisocyanate component,b) at least one compound corresponding to the formula ##STR1## wherein X represents an organic group which has a valency of n and is inert towards isocyanate groups at a temperature of 100.degree. C. or less,R.sup.1 and R.sup.2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less,R.sup.3 and R.sup.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less andn represents an integer with a value of at least 2, andc) 0.001 to 5 weight percent, based on the weight of components a) and b), of a tin(IV) compound which is a catalyst for the reaction between isocyanate groups and hydroxyl groups.