Deformable polyurethane having improved cure time
First Claim
1. A reaction system for use in making molded objects by an open or closed casting process, said system comprising the following components:
- (A) an aromatic polyisocyanate; and
(B) an active hydrogen-containing composition comprising(i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4;
(ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and
(iii) a secondary monoamine of the formula
space="preserve" listing-type="equation">R--NH--R'"'"' wherein R and R'"'"' are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that R and R1 together contain at least 4 carbon atoms, the ratio of (A) to (B) being such that the reaction of said system is conducted at an isocyanate index between about 0.90 and about 1.15,wherein said system, components (A) and (B), react to form a polyurethane partially capped with disubstituted urea groups.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for use in making molded polyurethane objects by an open or closed casting process, said system comprising
(A) an aromatic polyisocyanate; and
(B) an active hydrogen-containing composition comprising
(i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4;
(ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and
(iii) a secondary monoamine of the formula
R--NH--R'"'"'
wherein R and R'"'"' are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that said secondary monoamine contains at least 4 carbon atoms.
-
Citations
52 Claims
-
1. A reaction system for use in making molded objects by an open or closed casting process, said system comprising the following components:
-
(A) an aromatic polyisocyanate; and (B) an active hydrogen-containing composition comprising (i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4; (ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and (iii) a secondary monoamine of the formula
space="preserve" listing-type="equation">R--NH--R'"'"'wherein R and R'"'"' are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that R and R1 together contain at least 4 carbon atoms, the ratio of (A) to (B) being such that the reaction of said system is conducted at an isocyanate index between about 0.90 and about 1.15, wherein said system, components (A) and (B), react to form a polyurethane partially capped with disubstituted urea groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A polyurethane which is the reaction product of:
-
(A) an aromatic polyisocyanate; and (B) an active hydrogen-containing composition comprising (i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4; (ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and (iii) a secondary monoamine of the formula
space="preserve" listing-type="equation">R--NH--R'"'"'wherein R and R'"'"' are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that R and R1 together contain at least 4 carbon atoms, the ratio of (A) to (B) being such that said reaction is conducted at an isocyanate index between about 0.90 and about 1.15. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
-
-
44. An active hydrogen composition comprising, in the proportions noted,
(i) 100 parts by weight of a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4; -
(ii) 2 to 10 parts by weight of a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and (iii) 2 to 60 parts by weight of a secondary monoamine of the formula
space="preserve" listing-type="equation">R--NH--R'"'"'wherein R and R'"'"' are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that R and R1 together contain at least 4 carbon atoms. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52)
-
Specification