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US 10,883,016 B2Granted
Actinic radiation-curable urethane/urea-containing aerospace coatings and sealants
AssigneePRC-DeSoto International, Inc.
InventorsBruce Virnelson, Chandra Rao, Renhe Lin
Life of this patent
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Abstract
Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.
Claims20
A composition comprising
- (a) a polythiol, wherein the polythiol comprises a thiol-terminated polythioether urethane-containing prepolymer of Formula (2a), a thiol-terminated urea-containing polythioether prepolymer of Formula (2b), or a combination thereof:
- HS—R1—S—[—(CH2)2—R2—O—C(═O)—NH—R5—NH—C(═O)—O—R2—(CH2)2—S—R1—S—]n—H (2a)
- HS—R1—S—[—(CH2)2—R2—NH—C(═O)—NH—R5—NH—C(═O)—NH—R2—(CH2)2—S—R1—S—]n—H (2b)
- wherein,
- n is an integer from 1 to 20;
- R1 is selected from C2-6 alkanediyl, C6-8 cycloalkanediyl, C6-10 alkanecycloalkanediyl, C5-8 heterocycloalkanediyl, and —[—(CHR3)p—X—]q(CHR3)r—;
- wherein,
- each R3 is independently selected from hydrogen and methyl;
- each X is independently selected from —O—, —S—, —NH—, and —N(—CH3)—;
- p is an integer from 2 to 6;
- q is an integer from 1 to 5;
- and
- r is an integer from 2 to 10;
- each R2 is independently selected from C3-10 alkanediyl, substituted C3-10 alkanediyl, C3-10 heteroalkanediyl, and substituted C3-10 heteroalkanediyl;
- and
- each R5 is independently selected from C2-10 alkanediyl, C2-10, heteroalkanediyl, C5-12 cycloalkanediyl, C5-12 heterocycloalkanediyl, C6-20 arenediyl, C5-20 heteroarenediyl, C6-20 alkanecycloalkanediyl, C6-20 heteroalkanecycloalkanediyl, C7-20 alkanearenediyl, C720 heteroalkanearenediyl, substituted C2-10 alkanediyl, substituted C2-10, heteroalkanediyl, substituted C5-12 cycloalkanediyl, substituted C5-12 heterocycloalkanediyl, substituted C6-20 arenediyl, substituted C5-20 heteroarenediyl, substituted C6-20 alkanecycloalkanediyl, substituted C6-20 heteroalkanecycloalkanediyl, substituted C7-20 alkanearenediyl, and substituted C7-20 heteroalkanearenediyl;
- and
- (b) a polyalkenyl, wherein the polyalkenyl comprises a polyalkenyl-terminated urethane-containing prepolymer;
- a polyalkenyl-terminated urea-containing prepolymer;
- or a combination thereof.
17 more elements
A sealant system comprising:
- (a) a first part, wherein the first part comprises a polythiol, wherein the polythiol comprises a thiol-terminated urethane-containing polythioether prepolymer of Formula (2a), a thiol-terminated urea-containing polythioether prepolymer of Formula (2b), or a combination thereof:
- HS—R1—S—[—(CH2)2—R2—O—C(═O)—NH—R5—NH—C(═O)—O—R2—(CH2)2—S—R1—S—]n—H (2a)
- HS—R1—S—[—(CH2)2—R2—NH—C(═O)—NH—R5—NH—C(═O)—NH—R2—(CH2)2—S—R1—S—]n—H (2b)
- wherein,
- n is an integer from 1 to 20;
- R1 is selected from C2-6 alkanediyl, C6-8 cycloalkanediyl, C6-10 alkanecycloalkanediyl, C5-8 heterocycloalkanediyl, and —[—(CHR3)p—X—]q—(CHR3)r—;
- wherein,
- each R3 is independently selected from hydrogen and methyl;
- each X is independently selected from —O—, —S—, —NH—, and —N(—CH3)—;
- p is an integer from 2 to 6;
- q is an integer from 1 to 5;
- and
- r is an integer from 2 to 10;
- each R2 is independently selected from C3-10 alkanediyl, substituted C3-10 alkanediyl, C3-10 heteroalkanediyl, and substituted C3-10 heteroalkanediyl;
- and
- each R5 is independently selected from C2-10 alkanediyl, C2-10, heteroalkanediyl, C5-12 cycloalkanediyl, C5-12 heterocycloalkanediyl, C6-20 arenediyl, C5-20 heteroarenediyl, C6-20 alkanecycloalkanediyl, C6-20 heteroalkanecycloalkanediyl, C7-20 alkanearenediyl, C720 heteroalkanearenediyl, substituted C2-10 alkanediyl, substituted C2-10, heteroalkanediyl, substituted C5-12 cycloalkanediyl, substituted C5-12 heterocycloalkanediyl, substituted C6-20 arenediyl, substituted C5-20 heteroarenediyl, substituted C6-20 alkanecycloalkanediyl, substituted C6-20 heteroalkanecycloalkanediyl, substituted C7-20 alkanearenediyl, and substituted C7-20 heteroalkanearenediyl;
- and
- (b) a second part, wherein the second part comprises a polyalkenyl, wherein the polyalkenyl comprises:
- an alkenyl-terminated urethane-containing prepolymer;
- an alkenyl-terminated urea-containing prepolymer;
- or a combination thereof.
18 more elements
Dependencies are inferred from the claim text.