DETAILED DESCRIPTION OF THE INVENTION The composition which has a tendency to delaminate is comprised of at least two structurally dissimilar organic polymers.
The polymers should be so structurally dissimilar that the two polymers should not be totally soluble in each other under the conditions which the admixture is prepared and/or at room temperature.
Examples of thermoplastic polymers useful in accordance with this invention include polyolefins such as polyethylene, polypropylene, polyisobutylene, polyhexene, linear low density polyethylene and in general polyolefins derived from monomers having from two to about ten carbon atoms; ethylene propylene diene (EPDM) polymers, for example those wherein the diene is butadiene, polyesters such as those having all aliphatic units such as adipates, azelates, and succinates, a mixture of aliphatic and aromatic units such as polyalkylenephthalates, for example, polyethylene terephthalate, polybutylene terephthalate, polypropylene isophthalate and the like as well as those esters which are completely aromatic, sometimes known as polyarylates, for example polyester derived from bisphenols such as 2,2-bis(4-hydroxyphenyl)propane (bisphenol-A) and various diacids such as isophthalic acid, terephthalic acid, and naphthenic carboxylic acids.
Aromatic polycarbonates are also useful polymers and are those derived from bisphenol-A as well as those with other groups between the phenols to be further elaborated upon.
Aromatic copolyestercarbonates, for example, those polymers disclosed in Goldberg U.
S.
Pat.
No.
3,169,121 incorporated by reference and having carbonate as well as ester linkages present in the backbone of the polymer may also be employed.
Other thermoplastic families which may be employed with facility are the polyphenylene oxides, polyetherimide, polysulfones, polyethersulfones, styrenics, polyamides, polysulfides, polyurethanes, polyvinylhalides and rubbery type polymers such as butadienes, acrylates and alkacrylates.
Aromatic groups in these polymers are preferred
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