Terminal-modified difunctional sulfur-containing polymers, compositions thereof and methods of use
AssigneePRC-DeSoto International, Inc.
InventorsSteven J. Hobbs, Gregory J. McCollum, Lawrence G. Anderson, Renhe Lin
Life of this patent
Estimating the term…
Abstract
Disclosed are terminal-modified difunctional sulfur-containing polymers that are the reaction products of a sulfur-containing diol, an aldehyde or a ketone, and a compound containing a functional group. Compositions comprising the terminal-modified difunctional sulfur-containing polymers useful as sealants are also disclosed.
Claims43
A terminal-modified sulfur-containing polymer of Formula (II):
- wherein:
- n is an integer selected from 2 to 50;
- each p is independently selected from 1 and 2;
- each R1 is independently selected from C2-6 alkanediyl;
- each R2 is independently selected from hydrogen and C1-6 alkyl;
- and
- each R3 comprises a terminal thiol-terminated group.
A terminal-modified sulfur-containing polymer comprising the reaction products of reactants comprising (a) and (b), wherein,
- (a) comprises the reaction products of reactants (i) and (ii), wherein,
- (i) comprises a sulfur-containing polymer of Formula (I):
- wherein:
- n is an integer selected from 2 to 50;
- each p is independently selected from 1 and 2;
- each R1 is independently selected from C2-6 alkanediyl;
- and
- each R2 is independently selected from hydrogen, C1-6 alkyl, C7-12 phenylalkyl, substituted C7-12 phenylalkyl, C6-12 cycloalkylalkyl, substituted C6-12 cycloalkylalkyl, C3-12 cycloalkyl, substituted C3-12 cycloalkyl, C6-12 aryl, and substituted C6-12 aryl;
- and
- (ii) comprises a first compound selected from a diisocyanate, thiourea, an ethylenically unsaturated isocyanate, and a tosylate;
- and
- (b) comprises a mercaptoalkanol when (ii) comprises a diisocyanate;
- (b) comprises a metal hydrosulfide when (ii) comprises thiourea;
- (b) comprises a dithiol when (ii) comprises an ethylenically unsaturated isocyanate;
- and (b) comprises a metal hydrosulfide when (ii) comprises a tosylate.
A terminal-modified sulfur-containing polymer of Formula (II):
- wherein:
- n is an integer selected from 2 to 50;
- each p is independently selected from 1 and 2;
- each R1 is independently selected from C2-6 alkanediyl;
- each R2 is independently selected from hydrogen and C1-6 alkyl;
- and
- each R3 comprises a terminal silyl-terminated group.
Dependencies are inferred from the claim text.