High performance water and oil repellant

• US 4,788,287 A
• Filed: 09/03/1986
• Issued: 11/29/1988
• Est. Priority Date: 09/17/1985
• Status: Expired due to Fees

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Tamura, Masayuki, Ito, Katsuji, Matsuo, Masashi
• Primary Examiner(s): Schwartz, Richard A.
• Application Number:
  US06/903,197
• Time in Patent Office: 818 Days
• Field of Search: 544/222, 544/196, 544/197, 544/198, 558/232, 558/239, 558/240, 558/241, 560/25, 560/115, 560/158, 564/38, 564/50, 564/57, 564/59, 548/966, 549/473, 549/496
• US Class Current: 544/196
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/2885 containing halogen atoms
• CPC Class Codes: C08G 18/8061 masked with compounds having only one group containing active hydrogen
• CPC Class Codes: D06M 15/576 containing fluorine

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.

Claims

1. A high performance water and oil repellant having a molecular weight of from 800 to 20,000 of the formula:

##STR31## wherein R_f is a perfluoroalkyl group of the formula C_n F_2n+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.