Block polymers from isocyanurate-based polyesters and conventional polyester segments
AssigneeArmstrong Cork Company
InventorsJohn E. Herweh, William Y. Whitmore
Life of this patent
Estimating the term…
Abstract
A substantially linear segmented copolymer of the formula (MX).sub.n where n is an integer greater than 0 and M is a bivalent organic radical segment of the formula ##STR1## wherein R is hydrogen, C.sub.1 to C.sub.4 alkyl, aryl, or C.sub.1 to C.sub.4 alkyl substituted aryl; A is C.sub.1 to C.sub.4 alkylene; A' is C.sub.1 to C.sub.4 alkylene the same or different than A, phenylene or alkyl substituted phenylene; and y is an integer greater than 0; and X is a bivalent organic radical segment of the formula ##STR2## WHEREIN G is a long chain radical segment of recurring linkages selected from the group consisting of ester and ether; and z is an integer greater than 0 the same or different than y.
Claims8
A substantially linear segmented copolymer having the formula (MX).sub.n wherein n is an integer greater than 0 and M is a bivalent organic radical segment of the formula ##STR9## wherein R is hydrogen, C.sub.1 to C.sub.4 alkyl, aryl or C.sub.1 to C.sub.4 alkyl substituted aryl;
- A is C.sub.1 to C.sub.4 alkylene;
- A' is C.sub.1 to C.sub.4 alkylene the same or different from A, phenylene or alkyl substituted phenylene;
- and y is an integer greater than 0, said segment M of molecular weight from 1,000 to 20,000;
- and X is a bivalent organic radical segment of the formula ##STR10## wherein G is a long chain radical segment of recurring linkages selected from the group consisting of ester and ether;
- and z is in integer greater than 0 the same or different than said segment X of molecular weight 1,000 to 20,000;
- wherein the difference between the glass transition temperature of said segment M and said segment X is from about 50.degree. to about 200.degree. C.
A process for preparing a substantially linear segmented copolymer which comprises the steps of:
- a. reacting a linear isocyanurate-containing polymer segment of the formula ##STR12## wherein R is hydrogen, C.sub.1 to C.sub.4 alkyl, aryl or C.sub.1 to C.sub.4 alkyl-substituted aryl;
- A is C.sub.1 to C.sub.4 alkylene;
- A' is C.sub.1 to C.sub.4 alkylene, the same or different from A, phenylene, or alkyl-substituted phenylene, and y is an integer greater than 0, said linear isocyanurate-containing polymer having a molecular weight of 1,000 to 20,000 and terminally reactive groups selected from the group hydroxy, thiol and amine;
- b. an organic polymer of the formula --O--G].sub.z wherein G is a long chain radical segment of recurring linkages selected from the group ester and ether and z is an integer greater than 0, the same or different than y, said organic radical segment having a molecular weight of 1,000 to 20,000 and at least two reactive hydrogens;
- and
- c. a coupling agent wherein the difference between the glass transition temperature of said linear isocyanurate-containing polymer segment and said organic polymer segment is from about 50.degree. to about 200.degree..
Dependencies are inferred from the claim text.