Multi-layer compositions comprising a fluoropolymer

A chemically resistant multi-layer article comprising:

• a substantially non-fluorinated layer,
• and a fluorinated layer of fluoropolymer comprising interpolymerized monomeric units derived from
• one or more of hexafluoropropylene and tetrafluoroethylene monomers,
• one or more non-fluorinated olefinically unsaturated monomer,
• and substantially no vinylidene fluoride monomer;
• the multi-layer article further comprising an aliphatic di-, or polyamine, the aliphatic di-, or polyamine providing increased adhesion between the layers as compared to a multi-layer article not containing the aliphatic di-, or polyamine.

A method for increasing the adhesive bond strength between a fluoropolymer and a substantially non-fluorinated polymeric material, the method comprising the steps of:

• (a) providing a substantially non-fluorinated polymeric material comprising an aliphatic di-, or polyamine and a substantially non-fluorinated polymer;
• (b) providing a fluoropolymer comprising interpolymerized monomeric units derived from monomers comprising:
• one or more of hexafluoropropylene and tetrafluoroethylene monomers,
• one or more non-fluorinated olefinically unsaturated monomer, and
• substantially no vinylidene fluoride monomer;
• and
• (c) forming a multi-layer article comprising a substantially non-fluorinated layer made of the substantially non-fluorinated polymeric material contacting a fluorinated layer made of the fluoropolymer, wherein the aliphatic di-, or polyamine is present in the substantially non-fluorinated layer in an amount sufficient to increase the adhesive bond strength between the two layers compared to a multi-layer article without the aliphatic di-, or polyamine.

A method for increasing the adhesive bond strength between a fluoropolymer and a substantially non-fluorinated polymeric material, the method comprising the steps of:

• (a) providing a substantially non-fluorinated polymeric material;
• (b) providing a fluoropolymer comprising interpolymerized monomeric units derived from monomers comprising:
• one or more of hexafluoropropylene and tetrafluoroethylene monomers,
• one or more non-fluorinated olefinically unsaturated monomer, and
• substantially no vinylidene fluoride monomer;
• (c) applying an aliphatic di-, or polyamine to one or more of the substantially non-fluorinated polymeric material and/or the fluoropolymer;
• and
• (d) forming a multi-layer article comprising a substantially non-fluorinated layer made of the substantially non-fluorinated polymeric material contacting a fluorinated layer made of the fluoropolymer;
• wherein the aliphatic di-, or polyamine is applied to one or more of the substantially non-fluorinated layer and/or the fluorinated layer in an amount sufficient to increase the adhesive bond strength between the substantially non-fluorinated layer and the fluorinated layer compared to the adhesive bond strength between the substantially non-fluorinated layer and the fluorinated layer without the aliphatic di-, or polyamine.

A method of using a multi-layer article, comprising the steps of:

• providing a fluid;
• providing a multi-layer article comprising:
• a substantially non-fluorinated layer,
• and a fluorinated layer of fluoropolymer comprising interpolymerized monomeric units derived from
• one or more of hexafluoropropylene and tetrafluoroethylene monomers,
• one or more non-fluorinated olefinically unsaturated monomer,
• and substantially no vinylidene fluoride monomer;
• the multi-layer article further comprising an aliphatic di-, or polyamine, the aliphatic di-, or polyamine providing increased adhesion between the layers as compared to a multi-layer article not containing the aliphatic di-, or polyamine;
• and
• contacting the fluid with the multi-layer article.