High performance water and oil repellant
First Claim
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1. A high performance water and oil repellant having a molecular weight of from 800 to 20,000 of the formula:
- ##STR31## wherein Rf is a perfluoroalkyl group of the formula Cn F2n+1, X is --R--, --CON(R1)--Q-- or --SO2 N(R1)--Q--, each of A, A1 and A2 is --O--, --S-- or --N(R2)--, [Z] Z--A1 is a monovalent alcohol, thioalcohol or primary or secondary amine residue, a is an integer of from 1 to 5, b is an integer of from 0 to 4, a +b is an integer of from 1 to 5, W is a t-valent organic residue obtained by removing the t --NCO groups from a t-functional aliphatic, cycloaliphatic, aromatic or heterocyclic isocyanate compound having t --NCO groups, wherein t is an integer of a +b +1, B is a bivalent organic residue obtained by removing the two --A2 --H groups from a bifunctional polyvalent active hydrogen compound, and wherein B may have another organic group bonded by A2, Y is a bivalent organic residue obtained by removing the two --NCO groups from a bifunctional aliphatic, cycloaliphatic, aromatic or heterocyclic isocyanate compound, and wherein Y may have another organic group bonded by a --NHCO-- group, m is an integer of from 1 to 50, R is a bivalent alkylene group, R1 is a hydrogen atom or a lower alkyl group, Q is a bivalent alkylene group, R2 is a hydrogen atom or a monovalent aliphatic, cycloaliphatic, aromatic or heterocyclic group, or Z and R2 may form a ring.
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Abstract
A high performance water and oil repellant composed of a compound comprising at least two terminal segments and an intermediate segment connecting the terminal segments and having a molecular weight of from 800 to 20,000, each terminal segment containing at least one polyfluoroalkyl group connected by a --CONH-- linking group, said intermediate segment being a urethane oligomer containing at least two --CONH-- linking groups in one molecule, and said terminal segments and intermediate segment being connected by a --CONH-- linking group.
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1 Claim
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1. A high performance water and oil repellant having a molecular weight of from 800 to 20,000 of the formula:
- ##STR31## wherein Rf is a perfluoroalkyl group of the formula Cn F2n+1, X is --R--, --CON(R1)--Q-- or --SO2 N(R1)--Q--, each of A, A1 and A2 is --O--, --S-- or --N(R2)--, [Z] Z--A1 is a monovalent alcohol, thioalcohol or primary or secondary amine residue, a is an integer of from 1 to 5, b is an integer of from 0 to 4, a +b is an integer of from 1 to 5, W is a t-valent organic residue obtained by removing the t --NCO groups from a t-functional aliphatic, cycloaliphatic, aromatic or heterocyclic isocyanate compound having t --NCO groups, wherein t is an integer of a +b +1, B is a bivalent organic residue obtained by removing the two --A2 --H groups from a bifunctional polyvalent active hydrogen compound, and wherein B may have another organic group bonded by A2, Y is a bivalent organic residue obtained by removing the two --NCO groups from a bifunctional aliphatic, cycloaliphatic, aromatic or heterocyclic isocyanate compound, and wherein Y may have another organic group bonded by a --NHCO-- group, m is an integer of from 1 to 50, R is a bivalent alkylene group, R1 is a hydrogen atom or a lower alkyl group, Q is a bivalent alkylene group, R2 is a hydrogen atom or a monovalent aliphatic, cycloaliphatic, aromatic or heterocyclic group, or Z and R2 may form a ring.
Specification