Adhesion promoter for bonding fluoropolymer layers in a multi-layered article
View Patent ↗The present invention is directed to an adhesion promoter for bonding fluoropolymers and, more specifically, for bonding a fluoroplastic layer to a fluroelastomer layer in a multi-layered article, such as a fuel filler hose. In one embodiment, the adhesion promoter includes a solvent, a polyallyamine (PAA), and an organo-onium compound. The solvent can include an organic solvent, such as an alcohol, e.g., methanol, ethanol, or isopropanol. The polyallylamine includes a homopolymer of 2-propen-1-amine, and the organo-onium compound can include an organic phosphonium salt. The final composition of the adhesion promoter can include solvent in the range of about 80% by weight to about 99% by weight; polyallylamine in the range of about 0.5% by weight to about 10% by weight; and organo-onium compound in the range of about 0.5% by weight to about 10% by weight. Such adhesion promoter may further optionally include a silane, such as an organosilane.
1. An adhesion promoter comprising:
a solvent;
a polyallylamine defined by the structural formula: [—CH 2 CH(CH 2 NH 2 )—] n , wherein n=2 to about 175;
an organo-onium compound; and
a silane compound.
2. The adhesion promoter of claim 1 wherein organo-onium compound is an organic phosphonium salt.
3. The adhesion promoter of claim 1 wherein the solvent is an organic solvent.
4. The adhesion promoter of claim 3 wherein the organic solvent is a lower alcohol containing from about 1 to about 4 carbon atoms.
5. The adhesion promoter of claim 1 wherein the solvent is an alcohol, the polyallylamine is defined by the structural formula: [—CH 2 CH(CH 2 NH 2 )—] n , wherein n=2 to about 175, and the organo-onium compound is an organic phosphonium salt.
6. The adhesion promoter of claim 1 comprising:
about 80% by weight to about 99% by weight solvent;
about 0.5% by weight to about 10% by weight polyallylamine;
about 0.5% by weight to about 10% by weight organo-onium compound; and greater than 0% by weight to about 10% by weight silane compound.
7. The adhesion promoter of claim 6 wherein the polyallylamine is defined by the structural formula: [—CH 2 CH(CH 2 NH 2 )—] n , wherein n=2 to about 175.
8. The adhesion promoter of claim 6 wherein organo-onium compound is an organic phosphonium salt.
9. The adhesion promoter of claim 6 wherein the solvent is an organic solvent.
10. The adhesion promoter of claim 6 wherein the solvent is an alcohol, the polyallylamine is defined by the structural formula: [—CH 2 CH(CH 2 NH 2 )—] n , wherein n=2 to about 175, and the organo-onium compound is an organic phosphonium salt.
11. The adhesion promoter of claim 6 wherein the solvent is in the range of about 89% by weight to about 96% by weight; the polyallylamine is in the range of about 1.5% by weight to about 7% by weight; the organo-onium compound is in the range of about 2.5% by weight to about 4% by weight, and the silane compound is in the range of about 6.7% by weight to about 10% by weight silane compound.
12. An adhesion promoter comprising:
about 80% by weight to about 99% by weight alcohol;
about 0.5% by weight to about 10% by weight polyallylamine defined by the structural formula: [—CH 2 CH(CH 2 NH 2 )—] n , wherein n=2 to about 175; and
about 0.5% by weight to about 10% by weight organic phosphonium salt.
13. The adhesion promoter of claim 12 wherein the alcohol is a lower alcohol containing from about 1 to about 4 carbon atoms.
14. The adhesion promoter of claim 12 wherein the alcohol is in the range of about 89% by weight to about 96% by weight ; the polyallylamine is in the range of about 1.5% by weight to about 7% by weight; and the organic phosphonium salt is in the range of about 2.5% by weight to about 4% by weight.