US 7,320,818 B2 | ||
Multilayers of polyamides and fluorinated copolymers | ||
Julio A. Abusleme, Varese (Italy); and Claudia Manzoni, Bologna (Italy) | ||
Assigned to Ausimont S.p.A., Milan (Italy) | ||
Filed on Mar. 04, 2002, as Appl. No. 10/86,845. | ||
Claims priority of application No. MI2001 A 0525 (IT), filed on Mar. 13, 2001; and application No. MI2001 A 1152 (IT), filed on May 31, 2001. | ||
Prior Publication US 2003/0068499 A1, Apr. 10, 2003 | ||
Int. Cl. B32B 27/02 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/30 (2006.01); B32B 27/34 (2006.01) |
U.S. Cl. 428—36.91 [428/373; 428/378; 428/421; 428/474.4] | 17 Claims |
1. Multilayer manufactured articles consisting essentially of:
A) a layer consisting of thermoprocessable copolymers of ethylene with chlorotrifluoroethylene, and/or tetrafluoroethylene,
and with acrylic monomers of formula:
CH2═CH—CO—O—R2 (a)
wherein R2 is a hydrogenated radical from 1 to 20 carbon atoms, of alkyl, linear or branched type, cycloalkyl type, or H; R2 optionally contains Cl, O, N and/or one or more functional groups selected from —OH, —COOH, epoxide, ester or ether;
wherein the (a) monomer amount is in the range of 0.01-15% by moles with respect to the sum of the monomers of ethylene and
of CTFE and/or TFE and optionally containing additives selected from fillers, lubricants, pigments, fire retardants, plasticizers,
and thermal and UV stabilizers; and
B) a layer consisting of polyamides having an amount of —NH2 end groups in the range of 40-300 μeq/g and optionally containing additives selected from fillers, lubricants, pigments, fire
retardants, plasticizers, and thermal and UV stabilizers;
wherein there is adhesion higher than 10 N/mm between the layers of A) and B), and wherein the adhesion is reached after coextrusion
or coupling the layers at softening temperatures of the copolymers of layers A) and B).
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