Sandra K Rice

US Patent:

51569043, Oct 20, 1992

Filed:

May 18, 1990

Appl. No.:

7/525017

Inventors:

Sandra W. Rice - Greer SC
David Rudd - Naples NC

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

B32B 2708
B32B 2732

US Classification:

428219

Abstract:

Oriented polymeric film coated with polyethyleneimine is disclosed, in which the polyethyleneimine is coated in-line, i. e. , during the film manufacturing process for forming the polymeric film and before heat setting the film. In-line polyethyleneimine coated polymeric film, when used to make a laminate with other polymers such as polyethylene or ionomer type polymers, shows no signs of delamination between the polymeric film and the extrusion coated polymer after 2 hours in water at 121. degree. C. at 15 psi. In-line coating polyethyleneimine on the polymeric film can occur before any orientation of the polymeric film, during interdraw, with respect to biaxially oriented film, or after orienting the film, so long as the coating occurs before heat setting the film. The preferred polymeric film is polyethylene terephthalate.

US Patent:

50229443, Jun 11, 1991

Filed:

Apr 2, 1990

Appl. No.:

7/502964

Inventors:

Howard W. Swofford - Taylors SC
Sandra W. Rice - Greer SC
Grover L. Farrar - Greenville SC
David Rudd - Naples NC

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

B29C 4706

US Classification:

15624411

Abstract:

Oriented polyester film primer coated-in-line with hydrolyzed aminosilane is disclosed. The aminosilanes in the unhydrolyzed state have the formula: (R. sup. 1). sub. a Si(R. sup. 2). sub. b (R. sup. 3). sub. c wherein R. sup. 1 is a functional group with at least one primary amino group; R. sup. 2 is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R. sup. 3 is a nonreactive, nonhydrolyzeable group such as a lower alkyl or a phenyl group; with (a) being greater than or equal to 1; (b) being greater than or equal to 1; (c) being greater than or equal to zero; and with a+b+c=4. The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i. e, before, or during, or after the stretching operation, but prior to heat setting the film. The resultant primed polyester film is found to exhibit excellent adhesion to other polymeric materials.

US Patent:

49543962, Sep 4, 1990

Filed:

Jun 13, 1989

Appl. No.:

7/366051

Inventors:

Howard W. Swofford - Taylors SC
Sandra W. Rice - Greer SC
Grover L. Farrar - Greenville SC
David Rudd - Naples NC

Assignee:

Hoechst Celanese Corporation - Somerville NJ

International Classification:

B32B 2708
B32B 2736

US Classification:

428340

Abstract:

Oriented polyester film primer coated in-line with a hydrolyzed aminosilane is discovered. The aminosilanes in the unhydrolyzed state have the formula: (R. sup. 1). sub. a Si(R. sup. 2). sub. b (R. sup. 3). sub. c wherein R. sup. 1 is a functional group with at least one primary amino group; R. sup. 2 is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R. sup. 3 is a nonreactive, nonhydrolyzeable group such as a lower alkyl or a phenyl group; with (a) being greater than or equal to 1; (b) being greater than or equal to 1; (c) being greater than or equal to zero; and with a+b+c=4. The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i. e. , before, or during, or after the stretching operation, but prior to heat setting the film. The resultant primed polyester film is found to exhibit excellent adhesion to other polymeric materials.