Title: Method of improving the adhesion of propylene polymers to enamel coated metal surfaces

Abstract: Propylene polymers are heat sealed to enamel coated metal surfaces, the enamel having incorporated therein an adhesion promoting carboxyl modified polypropylene resin. The bond strength of the heat seal is improved by incorporating the carboxyl modified polypropylene resin in the enamel coating formulation dissolved in a hot (heated above 100.degree. C) organic solvent solution selected from aliphatic acids, alcohols and hydrocarbons having at least 10 carbon atoms.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Fitko, Chester W. (Chicago, IL, US)

Application Number: 616513
Filing Date: 1975-09-25
Publication_date: 1977-03-15
Assignee: The Continental Group Inc. (New York, NY)
Primary Class(es): 156/309.3 156/308.4, 156/308.6, 156/315, 156/330, 156/334, 220/359.4, 427/386, 427/410, 428/416, 428/418, 525/65, 525/66, 525/110
Other Classes:
US Patent Ref:

2838437	Jun, 1958	Busse et al.	156/308.
3222420	Dec, 1965	Heppolette	260/836.
3375300	Mar, 1968	Ropp	260/837.
3467730	Sep, 1969	Hicks	260/837.
3483276	Dec, 1969	Mahlman	260/33.
3499819	Mar, 1970	Lewis	428/313.
3637579	Jan, 1972	Barie et al.	260/836.
3655818	Apr, 1972	McKown	260/837.
3666138	May, 1972	Morris et al.	428/416.
3671356	Jun, 1972	Keinanen	156/309.

Other Refs:
Primary Examiner: Van Horn, Charles E.
Assistant Examiner: Gallagher, J. J.
Attorney: Shapiro; Paul, Kerwin; Joseph E., Dittman; William A.