Sizing composition for glass fibres, glass fibres sized therewith and process for their preparation, as well as glass fibre composites

摘要

1. Aqueous sizing agents for glass fibres which contain as film formers polyesters which are emulsifiable in water and are modified with polyether units and epoxy groups, characterised in that the modified polyesters contain 4 to 13% by weight of polyethylene oxide units having molecular weights between about 370 and 3,000 and 25 to 50% by weight of polypropylene oxide units having molecular weights of 116 to about 2,000.