EPDM ROOFING MEMBRANES WITH EXPANDABLE GRAPHITE AS FLAME RETARDANT

摘要

A method of preparing an EPDM roofing membrane panel, the method comprising preparing a vulcanizable composition including expandable graphite by mixing an EPDM rubber and expandable graphite, forming a sheet from said vulcanizable composition, preparing a green membrane panel using said sheet, and curing said green membrane panel to form the EPDM roofing membrane panel, where said steps of preparing a vulcanizable composition, said step of forming a sheet, said step of preparing a green membrane, an said step of curing each include a peak temperature at which each of said steps respectively take place, and where the expandable graphite has an onset temperature above said peak temperature of each respective step.

主权项

1. A method of preparing an EPDM roofing membrane panel, the method comprising:
(i) preparing a vulcanizable composition including expandable graphite by mixing an EPDM rubber and expandable graphite; (ii) forming a sheet from said vulcanizable composition; (iii) preparing a green membrane panel using said sheet; and (iv) curing said green membrane panel to form the EPDM roofing membrane panel, where said steps of preparing a vulcanizable composition, said step of forming a sheet, said step of preparing a green membrane, an said step of curing each include a peak temperature at which each of said steps respectively take place, and where the expandable graphite has an onset temperature above said peak temperature of each respective step.