Patent ID: 8609751

Claim:
A polymer microfiller composite comprising a molecularly self-assembling (MSA) material and a microfiller dispersed in the MSA material, wherein the microfiller is in the form of a particle having an average size of 1.0 micrometer (μm) or larger or a fiber having an average diameter of 1.0 micrometer or larger, and the microfiller comprises a cellulosic material, the microfiller comprising from 1 weight percent (wt %) to 90 wt % of the polymer microfiller composite based on total weight of the polymer microfiller composite; and wherein MSA material comprises a repeat unit of Formula I: at least one second repeat unit selected from the group consisting of Formula II and Formula III: and an ester-urethane unit of Formula IV: wherein: R is at each occurrence, independently a C 2 -C 20 non-aromatic hydrocarbylene group, a C 2 -C 20 non-aromatic heterohydrocarbylene group, or a polyalkylene oxide group having a group molecular weight of from about 100 grams per mole to about 5000 grams per mole; R 1 at each occurrence independently is a bond or a C 1 -C 20 non-aromatic hydrocarbylene group; R 2 at each occurrence independently is a C 1 -C 20 non-aromatic hydrocarbylene group; R N is —N(R 3 )—Ra—N(R 3 )—, where R 3 at each occurrence independently is H or a C 1 -C 6 alkylene and Ra is a C 2 -C 20 non-aromatic hydrocarbylene group, or R N is a C 2 -C 20 heterocycloalkyl group containing the two nitrogen atoms, wherein each nitrogen atom is bonded to a carbonyl group according to formula (III) above; n is at least 1 and has a mean value less than 2; and w represents the ester mol fraction of Formula I, and x, y and z represent the amide or urethane mole fractions of Formulas II, III, and IV, respectively, where w+x+y+z=1, and 0<w<1, and at least one of x and y is greater than zero but less than 1; wherein z is greater than zero and wherein when the MSA material is in a form of a melt, the polymer microfiller composite being characterized by a zero shear viscosity of less than 10,000,000 Pascal-seconds at from above T m up to about 40° C. above T m of the MSA material and wherein the MSA material has a number average molecular weight of less than 7,500 g/mol.