Cold-tolerant sealants and components thereof
Assignee3M Innovative Properties Company
InventorsSusan E. DeMoss, Jonathan D. Zook, Matthew Capel
Life of this patent
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Abstract
Polythioether polymers, sealants containing polythioether polymers, and compounds useful as stabilizing monomers in the manufacture of polythioether polymers are provided. In many embodiments the polymers and sealants demonstrate reduced risk of spoilage that may be caused by low temperature storage of the polymer or uncured sealant. Compounds useful as stabilizing monomers include compounds according to formula I: CH2═CR1—CHR2—S—R3—S—CHR4—CR5═CH2 [I] wherein R1, R2, R4 and R5 are independently selected from —H, —CH3 or —C2H5, and wherein R3 is selected from divalent groups comprising 2-12 carbon atoms, 0-5 ether oxygen atoms and 0-5 thioether sulfur atoms, which may be straight, branched or cyclic.
Claims24
A polythioether polymer which is a copolymer of one or more compounds according to formula I:
- CH2═CR1—CHR2—S—R3—S—CHR4—CR5═CH2 [I]
- wherein R1, R2, R4 and R5 are independently selected from —H, —CH3 or —C2H5, and
- wherein R3 is selected from divalent groups comprising 2-12 carbon atoms, 0-5 ether oxygen atoms and 0-5 thioether sulfur atoms, which may be straight, branched or cyclic;
- with one or more polythiols.
A polythioether polymer comprising divalent groups in the polymer backbone according to formula XI:
- —S—R11—S—CH2—CHR12—CHR13—S— [XI]
- wherein R11 is selected from divalent groups comprising 2-12 carbon atoms, 0-5 ether oxygen atoms and 0-5 thioether sulfur atoms, which may be straight, branched or cyclic;
- and
- wherein R12 and R13 are independently selected from —H, —CH3 or —C2H5, provided that at least one of R12 and R13 is not —H.
A polythioether polymer comprising divalent groups in the polymer backbone according to formula XXI:
- —S—R21—S—CH(CH3)—CH2—S— [XXI]
- wherein R21 is selected from divalent groups comprising 2-12 carbon atoms, 0-5 ether oxygen atoms and 0-5 thioether sulfur atoms, which may be straight, branched or cyclic.
Dependencies are inferred from the claim text.