Blend containing at least a cellulose ester and a block copolymer elastomer

Claim 2

Composition of claim 1 comprising the following additional component: IV. from about 0.5 to about 38 percent by weight of the composition of a plasticizer for said component (I).

Claim 3

Composition of claim 1 comprising the following additional components: III. from about 2 to about 10 percent by weight of the composition of an acrylic polymer or copolymer consisting essentially of 70 to 100 percent of the same or a combination of repeating units having the following formula: wherein R is a hydrogen atom or a methyl group and R'' is a methyl or ethyl group, and up to 30 percent of repeating units having the same formula wherein R'' is hydrogen or units from any other copolymerizable vinyl polymer, said acrylic polymer having an inherent viscosity of at least about 0.3 as measured at about 25* C. at a concentration of about 0.25 percent by weight in dimethylformamide. IV. from about 0.5 to about 38 percent by weight of the composition of a plasticizer for said component (I).

Claim 4

Composition of claim 1 having a transparency ratio greater than 20 wherein said ratio is defined as follows: said ratio being determined for a sheet 0.125 inch thick using a photometer and I is the intensity of light transmitted at 0* and 1* with reference to an incident beam of monochromatic light having a wave length of 546 millimicrons.

Claim 5

Composition of claim 1 having a notched Izod impact strength of at least about 3.

Claim 6

Composition of claim 1 wherein said component (II) has an elongation of at least 300 percent.

Claim 7

The composition of claim 1 in which the cellulose ester is cellulose acetate.

Claim 8

The composition of claim 1 in which the cellulose ester is cellulose acetate propionate.

Claim 9

The composition of claim 1 wherein the cellulose ester is cellulose acetate butyrate.

Claim 10

The composition of claim 1 in which the cellulose ester is cellulose dibenzoate.

Claim 11

A composition pertaining to claim 1 which contains 85 percent of a cellulose acetate butyrate containing 37 percent butyryl groups, 13 percent acetyl groups and 2 percent hydroxy groups; 10 percenT of a block copolyetherester having an inherent viscosity of 2.2 is measured at 25* C. at a concentration of about 0.25 percent by weight in 60/40 parts by weight phenol/tetrachloroethane solution, and consisting of 81 percent of a 3,800 molecular weight poly(tetramethylene glycol) modified with 6 percent of 8-oxabicyclononane, and 19 percent poly(1,4-cyclohexylenedimethylene terephthalate); and 5 percent of a polyethylacrylate having an inherent viscosity in dimethylformamide of 1.0.

Claim 12

The composition of claim 1 in which the elastomeric block copolymer is a polyetherurea prepared from a mixture of 2.2 mole parts of 2,000 molecular weight poly(tetramethyleneglycol) poly(tetramethylene glycol) one mole part of 8-oxabicyclononane modified poly(tetramethylene glycol) containing 8 percent of 8-oxabicyclononane with a polar segment consisting of p-xylene diisocyanate and 1,4-cyclohexane-bis(methylamine) having an inherent viscosity of 4.7.