Rapid cure polymeric resins
AssigneeThe Boeing Company
InventorAndrew M. Zweig
Life of this patent
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Abstract
A polysulfide material having reactive vinyl end groups and a method of making a vinyl end-capped polysulfide material are described. The vinyl end-capped polysulfide material has potential applications as a sealant, an adhesive, a coating, a caulking, or the like. In a specific example, the polysulfide material may be used as a precursor material for a sealant resin in the manufacturing of an integral fuel tank of an aircraft. An example method for making polysulfide materials includes contacting a vinyl-functionalized aryl halide and/or a vinyl-functionalized heteroaryl halide with dithiols and/or trithiols in the presence of an organic solvent.
Claims19
A polymer of formula (I):
- wherein:
- each instance of R1 is -alkyl-O-alkyl-O-alkyl-;
- each instance of R2 is the same or different and is selected from
- each instance of R24 is the same or different and is selected from hydrogen (H), alkyl, or alkoxy;
- “Linker” is of formula (II):
- c is less than 1.0;
- d is 0 when c is 0;
- and
- a+b+d is from about 7 to about 38.
A method of making a polymer, comprising:
- contacting, in presence of an organic solvent, at least one compound of formula (III):
- at least one compound of formula (IV):
- and
- at least one compound of formula (V):
- wherein:
- each instance of R1 is -alkyl-O-alkyl-O-alkyl-;
- each instance of R2 is the same or different and is selected from
- each instance of R24 is the same or different and is selected from hydrogen (H), alkyl, or alkoxy;
- X is halo;
- n is from about 7 to about 38;
- and
- e+f+g is from about 7 to about 38.
A polymer blend comprising:
- a first polymer of formula (I):
- wherein:
- R1 is -alkyl-O-alkyl-O-alkyl-,
- each instance of R2 is the same or different and is selected from
- each instance of R24 is the same or different and is selected from hydrogen (H), alkyl, or alkoxy;
- “Linker” is of formula (II):
- c is less than 1.0 but greater than 0, and
- a+b+d is from about 7 to about 38;
- and
- a second polymer of formula (I):
- wherein:
- R1 is -alkyl-O-alkyl-O-alkyl-,
- each instance of R2 is the same or different and is selected from
- each instance of R24 is the same or different and is selected from hydrogen (H), alkyl, or alkoxy;
- “Linker” is of formula (II):
- c=0, d=0, and
- a+b is from about 7 to about 38.
Dependencies are inferred from the claim text.