초록 ▼

A waterproofing sheet material useful for example as a free floating membrane or flashing material in roofing applications, a pond liner, or a gasketing material, composed of from about 15 wt. % to about 80 wt. % of an ingredient selected from the group consisting of: (a) homopolymers of alkadienes

A waterproofing sheet material useful for example as a free floating membrane or flashing material in roofing applications, a pond liner, or a gasketing material, composed of from about 15 wt. % to about 80 wt. % of an ingredient selected from the group consisting of: (a) homopolymers of alkadienes and substituted alkadienes (b) addition copolymers of alkadienes with unsaturated monomers (c) homopolymers of alkenes and substituted alkenes selected from the group consisting of polyethylene, chlorosulfonated polyethylene and polyisobutylene (d) resin acids and resin acid derivatives (e) highly aromatic bituminous materials, and (f) pine oil and from about 85 wt. % to about 20 wt. % of a plasticized polyvinyl butyral resin. Minor amounts of fatty acids and paraffin wax may be added to improve low temperature properties and to facilitate processing a hot melt admixture of the ingredients into a sheet.

대표청구항 ▼

A self-supporting sheet material suitable for use as a waterproofing membrane in roofing and other structural applications, said sheet material having a thickness within the range of about 20 to about 90 mils and being composed of from about 20 wt.% to about 80 wt.% of a coal tar pitch having a soft

A self-supporting sheet material suitable for use as a waterproofing membrane in roofing and other structural applications, said sheet material having a thickness within the range of about 20 to about 90 mils and being composed of from about 20 wt.% to about 80 wt.% of a coal tar pitch having a softening point as measured by ASTM D-36 within the range of about 100°F. to about 200°F., and from about 80 wt.% to about 20 wt.% of a plasticized polyvinyl butyral resin.