POLYCHLOROPRENE-BASED BONDING ADHESIVES

1 . An adhesive composition comprising:

i. a solids component, said solids component including a rubber component that includes polychloroprene; and

ii. a solvent component, said solvent component including t-butyl acetate.

2 . The composition of claim 1 , where the solvent component includes a blend of t-butyl acetate, methyl acetate, and acetone.

3 . The composition of claim 2 , where the solvent component includes from 150 to 500 parts by weight t-butyl acetate, from 50 to 300 parts by weight acetone, and from 5 to 100 parts by weight methyl acetate, per 100 parts by weight rubber.

4 . The composition of claim 2 , where the solvent component includes from 285 to 310 parts by weight t-butyl acetate, from 170 to 190 parts by weight acetone, and from 15 to 25 parts by weight methyl acetate, per 100 parts by weight rubber.

5 . The composition of claim 3 , where the solvent component further includes 5 to 300 parts by weight toluene per 100 parts by weight rubber.

6 . The composition of claim 4 where the solvent component further includes 35 to 45 parts by weight toluene per 100 parts by weight rubber.

7 . The composition of claim 1 , where the rubber component further includes poly-(styrene-co-butadiene).

8 . The composition of claim 1 , where the rubber component is devoid of a complementary rubber, and where the solids component includes an adhesion promoter.

9 . An adhesive composition comprising:

i. a solids component, said solids component including a rubber component, a synthetic thermosetting resin, and a hydrocarbon resin, where the rubber component includes polychloroprene; and

ii. a solvent component, said solvent component including t-butyl acetate, toluene, acetone, and methyl acetate.

10 . A method of contact bonding a roofing membrane to a substrate, the method comprising:

i. applying a contact adhesive composition to a portion of a roofing membrane panel to form a wet film on the membrane panel;

ii. applying a contact adhesive composition to at least a portion of a substrate to form a wet film on the substrate;

iii. allowing the wet film on the membrane and the wet film on the substrate to set up for desirable contact bonding; and

iv. mating the membrane to the substrate, where the adhesive composition includes

a. a solids component, said solids component including a rubber component, a synthetic thermosetting resin, and a hydrocarbon resin, where the rubber component includes polychloroprene; and

b. a solvent component, said solvent component including t-butyl acetate, toluene, acetone, and methyl acetate.