US 11,655,340 B2
Dual cure sealants
JianCheng Liu, Arcadia, CA (US); Srikant Pathak, Diamond Bar, CA (US); and Bruce Virnelson, Valencia, CA (US)
Assigned to PRC-DESOTO INTERNATIONAL, INC., Sylmar, CA (US)
Appl. No. 16/620,759
Filed by PRC-DeSoto International, Inc., Sylmar, CA (US)
PCT Filed Jun. 8, 2018, PCT No. PCT/US2018/036746
§ 371(c)(1), (2) Date Dec. 9, 2019,
PCT Pub. No. WO2018/227149, PCT Pub. Date Dec. 13, 2018.
Claims priority of provisional application 62/517,648, filed on Jun. 9, 2017.
Prior Publication US 2020/0199300 A1, Jun. 25, 2020
Int. Cl. C08G 75/02 (2016.01); C08G 65/00 (2006.01); C08G 75/0222 (2016.01); C08G 75/0231 (2016.01); C08G 75/025 (2016.01); C08J 7/18 (2006.01); C08K 5/00 (2006.01); C08K 5/14 (2006.01); C08K 5/17 (2006.01)
CPC C08G 75/0218 (2013.01) [C08G 65/002 (2013.01); C08G 75/025 (2013.01); C08G 75/0222 (2013.01); C08G 75/0231 (2013.01); C08J 7/18 (2013.01); C08K 5/0091 (2013.01); C08K 5/14 (2013.01); C08K 5/17 (2013.01); C08G 2190/00 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A composition comprising:
a polythiol, wherein the polythiol comprises a thiol-terminated polythioether prepolymer, wherein the thiol-terminated polythioether prepolymer comprises a moiety having the structure of Formula (2c):
—S—R1—[S-A-S—R1-]n—S—  (2c)
wherein,
n is an integer from 1 to 60;
each R1 is independently selected from C2-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanecycloalkanediyl, C5-8 heterocycloalkanediyl, and —[(CHR3)p—X—]q(CHR3)—, wherein,
p is an integer from 2 to 6;
q is an integer from 1 to 5;
r is an integer from 2 to 10;
each R3 is independently selected from hydrogen and methyl; and
each X is independently selected from O, S, and NR, wherein R is selected from hydrogen and methyl; and
each A is independently a moiety derived from a polyvinyl ether of Formula (3) and a polyalkenyl polyfunctionalizing agent of Formula (4):
CH2═CH—O—(R2—O)m—CH═CH2  (3)
B(—R70—CH═CH2)z  (4)
wherein,
m is an integer from 0 to 50;
each R2 is independently selected from C1-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanecycloalkanediyl, and —RCHR)p—X—WCHR3),—, wherein p, q, r, R3, and X are as defined for R1;
B represents a core of a z-valent, polyalkenyl polyfunctionalizing agent B(—R70—CH═CH2)z wherein,
z is an integer from 3 to 6; and
each R70 is independently selected from C1-10 alkanediyl, C1-10 heteroalkanediyl, substituted C1-10 alkanediyl, and substituted C1-10 heteroalkanediyl;
a polyalkenyl, wherein the polyalkenyl comprises an alkenyl-terminated prepolymer, a polyalkenyl monomer, or a combination thereof;
a metal complex; and
an organic peroxide.