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OwnerEduardo Cruz, Michael J. Radler +5inventors
InventorsEduardo Cruz, Michael J. Radler, Ana Cláudia Rueda Nery, Prasanna K. Jog, Gerald F. Billovits, Jonathan D. Moore, Thomas J. Parsons
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The present invention provides bi-component core-shell polymeric microfibers for reinforcing concrete comprising as a first component (shell) ethylene-vinyl alcohol (EVOH) polymer and at least one plasticizer, preferably, polyethylene glycol, and as a second component (core) a polymer chosen from a polyamide, a polyester, such as polyethylene terephthalate, and a polymer blend of a polyolefin and an anhydride grafted polyolefin and having an aspect ratio of length to diameter (L/D) or equivalent diameter of from 300 to 1000. The bi-component polymeric microfibers comprise from 5 to 45 wt. % of the first component, are easily processed, and provide fiber cements having improved mechanical properties at relatively low microfiber loadings.
A composition comprising bi-component polymeric microfibers for reinforcing concrete having as an outer or first component or shell ethylene-vinyl alcohol (EVOH) polymer having from 30 mol % to 50 mol % of ethylene, and at least one plasticizer, and as a second component or core a polymer chosen from a polyamide, a polyester, and a polymer blend of, on one hand, a polyolefin, and, on the other hand, an anhydride grafted polyolefin, the bi-component polymeric microfibers having an aspect ratio of length to diameter (L/D) or equivalent diameter of from 300 to 1000.
Dependencies are inferred from the claim text.