Xanthene-based plasticizer of resins and polymers
OwnerJohn G. MacDonald, Teuta Elshani +3inventors
InventorsJohn G. MacDonald, Teuta Elshani, Hristo A. Hristov, Molly K. Smith, Ilona F. Weart
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Abstract
A composition of matter for increasing the relative flexibility and plasticity of crystalline or semi-crystalline resins and polymers is described. In particular, the compositions include xanthene or anthene-based molecular structures that can increase the plastic properties of curable resins or thermosetting polymers when incorporated into the polymer material. Certain uses for such a polymeric composition are also provided.
Claims29
A curable composition of matter comprising a semi-crystalline polymer with a minimal crystalline content of about 40% to about 55% by weight of the polymer, and a compound with a xanthene-based molecular structure in an amount up to about 5% and said composition exhibits a ratio of about 1.3:1.8:1.0 to about 1.6:1.5:1.0, respective of a mesophase:crystalline phase:amorphous phase when cured
An article of manufacture comprising curable polymers, the curable polymer having a semi-crystalline polymer matrix incorporating a plasticizer comprising a xanthene molecule or a compound with a xanthene-based molecular structure.
The article according to claim 23, wherein said semi-crystalline polymer is a copolymer derived from one or more cyanoacrylate monomers or a blend of cyanoacrylate monomers, wherein the cyanoacrylate monomers are selected from alkyl 2-cyanoacrylate, alkenyl 2-cyanoacrylate, alkoxyalkyl 2-cyanoacrylate, or carbalkoxyalkyl 2-cyanoacrylate, wherein the alkyl group may have 1 to 16 carbon atoms and may be methyl 2-cyanoacrylate, ethyl 2-cyanoacrylate, n-propyl 2-cyanoacrylate, iso-propyl 2-cyanoacrylate, n-butyl 2-cyanoacrylate, iso-butyl 2-cyanoacrylate, hexyl 2-cyanoacrylate, n-octyl 2-cyanoacrylate, 2-octyl 2-cyanoacrylate, 2-methoxyethyl 2-cyanoacrylate, 2-ethoxyethyl 2-cyanoacrylate and 2-propoxyethyl 2-cyanoacrylate.
A method of plasticizing a crystalline-phase-containing polymer, the method comprises:
- providing in a mixture a polymer with about 30% to about 70% crystallinity and a plasticizing agent having a xantliene-based molecular structure present in an amount of up to about 2.2 wt. % of total composition;
- agitating and heating said mixture to a temperature of up to about 95° C.;
- and then allowing said mixture to cool to about ambient room temperature.
A flexible barrier coating for mammalian skin, the coating comprising:
- a crystalline or semi-crystalline polymer and a plasticizing agent, said plasticizing agent having a xanthene or xanthene-based molecular structure, and said barrier coating exhibiting an elastic modulus approaching the elastic modulus of human skin.
Dependencies are inferred from the claim text.