Polymerizable materials, anaerobically curable compositions, and related methods and products
View Patent ↗Described are polymerizable materials (e.g., compounds, prepolymers, and compositions thereof) useful in curable compositions such as anaerobically curable compositions, the compositions including adhesives, sealants, paints, coatings, and the like, as well as methods of making the polymerizable materials and using the polymerizable materials and curable compositions.
1. An anaerobically curable composition comprising:
at least 5 percent by weight, based on total solids of the composition, prepolymer of the formula:
wherein each R 1 is the same or different, and is a divalent alkylene group having from 2 to 3 carbon atoms that is optionally branched or straight, and wherein m is in a range from 1 to 500 and
an anaerobic cure system comprising polymerization initiator capable of causing the prepolymer to polymerize in the absence of oxygen,
wherein the prepolymer molecules polymerize by reaction between maleic acid unsaturation of the molecules to produce a cured composition.
2. A prepolymer composition of claim 1 wherein m is in a range from 2 to about 65.
3. A prepolymer composition of claim 1 wherein each R 1 is the same or different, and is selected from a divalent ethylene group or a divalent propylene group.
4. A prepolymer composition of claim 3 wherein:
each R 1 is a divalent ethylene group and the group represented by
—O—(—R 1 —O—) m —R 1 —O—
has a molecular weight in a range from about 100 to about 22,000; or
each R 1 is a divalent propylene group and the group represented by
—O—(—R 1 —O—) m —R 1 —O—
has a molecular weight in a range from about 100 to about 4,100.
5. A prepolymer composition of claim 1 comprising at least 80 weight percent of the prepolymer based on total solids of the prepolymer composition.
6. An anaerobically curable composition comprising:
prepolymer of the formula:
H—O—C(O)—CH═CH—C(O)—O-A-O—C(O)—CH═CH—C(O)—O—H
wherein A is a divalent linking group selected from a divalent alkylene group, a divalent oxyalkylene group, or a divalent polyoxyalkylene group, and
an anaerobic cure system comprising polymerization initiator capable of causing the prepolymer to polymerize in the absence of oxygen,
wherein the prepolymer molecules polymerize by reaction between maleic acid unsaturation of the molecules to produce a cured composition.
7. A composition of claim 6 wherein the prepolymer has formula:
wherein each R 1 is the same or different, and is selected from a divalent ethylene group and a divalent propylene group, and wherein m is in a range from 0 to about 500.
8. A composition of claim 7 wherein each R 1 is a divalent ethylene group and the divalent linking group has a molecular weight in a range from about 100 to about 22,000.
9. A composition of claim 7 each R 1 is a divalent propylene group and the divalent linking group has a molecular weight in a range from about 100 to about 4,100.
10. A composition of claim 6 comprising from 5 to 95 weight percent of the prepolymer based on total solids of the composition.
11. A composition of claim 6 comprising
from 5 to 90 weight percent of the prepolymer, and
at least 5 weight percent unsaturated free-radically polymerizable materials, plasticizer, or combinations thereof,
based on total solids of the composition.
12. A composition of claim 6 comprising less than 5 weight percent solvent.
13. A composition of claim 6 comprising from 5 to 75 weight percent solvent.
14. A composition of claim 6 comprising from 5 to 75 weight percent water.
15. A composition of claim 6 wherein the anaerobic cure system includes initiator selected from a peroxide, hydroperoxide, an imide, and a formamide.
16. A composition of claim 15 wherein the anaerobic cure system includes initiator selected from: tertiary butyl hydroperoxide; cumene hydroperoxide; benzoic sulfimide, succinimide, phthalimide, formamide, an N-substituted formamide, and a metallic salt thereof and 1-hydroxycyclohexyl phenyl-ketone.
17. A composition of claim 6 comprising a quinone as polymerization inhibitor.
18. A composition of claim 6 comprising polymerization inhibitor selected from: α-naphthoquinone, β-naphthoquinone, and a derivative thereof.
19. A composition of claim 6 comprising polymerization inhibitor selected from: 2-methoxy-1,4-naphthoquinone; 2-hydroxy-1,4-naphthoquinone; and 2,5-dimethoxy-1,4-benzoquinone.
20. A composition of claim 6 contained in an oxygen-permeable container that also contains oxygen-containing headspace.
21. A composition of claim 1 wherein R 1 is derived from a di-hydroxyl terminal compound having a molecular weight in a range from about 250 to 2,000.
22. A composition of claim 6 wherein the divalent linking group is derived from a di-hydroxyl terminal compound having a molecular weight in a range from about 250 to 2,000.