Adhesion promoting compositions and method of improving fuel resistance of a coated article

1 . A film-forming composition comprising:

A) a non-chlorinated, linear polyolefin polymer comprising 0.5 to 10 percent by weight residues of an ethylenically unsaturated anhydride or acid, based on the total weight of the linear polyolefin polymer;

B) an aminoplast; and

C) a component comprising:

i) at least one non-chlorinated hydrocarbon having at least 18 carbon atoms and which optionally includes aromatic groups and/or oxygen heteroatoms, having a number average molecular weight of 200 to 2500; and/or

ii) an alkyd resin that is different from the component C) i); wherein the linear polyolefin polymer A) is further reacted with a) an isocyanate-functional alkoxysilane, b) a lactone, or c) a lactide.

2 . The film-forming composition of claim 1 wherein the linear polyolefin polymer A) is further reacted with the isocyanate-functional alkoxysilane a), and wherein the isocyanate-functional alkoxysilane a) comprises an isocyanatopropyl trimethoxy silane and/or an isocyanatopropyl triethoxy silane.

3 . The film-forming composition of claim 1 wherein the linear polyolefin polymer A) further comprises residues of an ethylenically unsaturated monomer comprising at least one (meth)acrylic monomer.

4 . The film-forming composition of claim 1 wherein the aminoplast B) is at least partially alkylated and wherein 10 to 35 percent of functional groups on the aminoplast comprise imino groups.

5 . The film-forming composition of claim 1 wherein the component C) comprises the non-chlorinated hydrocarbon i), which in turn comprises:

a) an addition polymer prepared from 1) coumarone and/or indene, and 2) at least one of styrene, alphamethyl styrene, m-methyl styrene, and p-methyl styrene;

b) a hydroxyl functional, branched polyolefin polymer;

c) a polyterpene polymer; and/or

d) a fatty acid oil.

6 . The film-forming composition of claim 1 , wherein the component C) comprises the alkyd resin ii).

7 . The film-forming composition of claim 1 , further comprising a colorant.

8 . The film-forming composition of claim 1 , further comprising a hydroxyl functional (meth)acrylic polymer, a hydroxyl functional polyester polymer, an acid functional (meth)acrylic polymer, and/or an acid functional polyester polymer.

9 . A film-forming composition comprising:

A) a non-chlorinated, linear polyolefin polymer comprising 0.5 to 10 percent by weight residues of an ethylenically unsaturated anhydride or acid, based on the total weight of the linear polyolefin polymer;

B) an aminoplast; and

C) a component comprising:

i) at least one non-chlorinated hydrocarbon having at least 18 carbon atoms and which optionally includes aromatic groups and/or oxygen heteroatoms, having a number average molecular weight of 200 to 2500; and/or

ii) an alkyd resin that is different from the component C) i); wherein the linear polyolefin polymer A) is dispersed with a diepoxide and a monohydric alcohol comprising isopropanol and/or n-butanol in an organic medium; and wherein the linear polyolefin polymer A) is further reacted with the diepoxide and the monohydric alcohol.

10 . The film-forming composition of claim 9 wherein the linear polyolefin polymer A) further comprises residues of an ethylenically unsaturated monomer comprising at least one (meth)acrylic monomer.

11 . The film-forming composition of claim 9 wherein the aminoplast B) is at least partially alkylated and wherein 10 to 35 percent of functional groups on the aminoplast comprise imino groups.

12 . The film-forming composition of claim 9 , wherein the component C) comprises the alkyd resin ii).

13 . The film-forming composition of claim 9 , further comprising a colorant.

14 . The film-forming composition of claim 9 , further comprising a hydroxyl functional (meth)acrylic polymer, a hydroxyl functional polyester polymer, an acid functional (meth)acrylic polymer, and/or an acid functional polyester polymer.

15 . A film-forming composition comprising:

A) a non-chlorinated, linear polyolefin polymer comprising 0.5 to 10 percent by weight residues of an ethylenically unsaturated anhydride or acid, based on the total weight of the linear polyolefin polymer, and residues of an ethylenically unsaturated monomer comprising at least one (meth)acrylic monomer;

B) an aminoplast; and

C) a component comprising:

i) at least one non-chlorinated hydrocarbon having at least 18 carbon atoms and which optionally includes aromatic groups and/or oxygen heteroatoms, having a number average molecular weight of 200 to 2500; and/or

ii) an alkyd resin that is different from the component C) i).

16 . The film-forming composition of claim 15 wherein the linear polyolefin polymer A) is dispersed with a polyepoxide and a monohydric alcohol in an organic medium.

17 . The film-forming composition of claim 15 wherein the linear polyolefin polymer A) is further reacted with a polyepoxide and a monohydric alcohol.

18 . The film-forming composition of claim 15 wherein the aminoplast B) is at least partially alkylated and wherein 10 to 35 percent of functional groups on the aminoplast comprise imino groups.

19 . The film-forming composition of claim 15 , wherein the component C) comprises the alkyd resin ii).