US 5,703,154 A · Premolded pipe flashing compositions

Abstract

A premolded EPDM pipe flashing composition comprises 100 parts by weight of an elastomeric polymer comprising from about 70 to 95 parts by weight of at least one amorphous ethylene-propylene-diene terpolymer and from 5 to about 30 parts by weight of at least one crystalline or semi-crystalline ethylene-propylene-diene terpolymer; from about 35 to 175 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of the polymer; from about 30 to 110 parts by weight of a processing material and mixtures thereof, per 100 parts of the polymer; and from about 0.6 to 7.5 parts by weight of a cure package, per 100 parts of the polymer, the cure package comprising from about 0.1 to 1.5 parts by weight sulfur and from 0.5 to 6 parts by weight of at least one sulfur vulcanizing accelerator. The premolded EPDM pipe flashing composition provides dimensional stability substantially equivalent to conventional black EPDM roofing membranes and meets the weathering, UV and heat aging resistance requirements as well as the viscosity, low temperature flexibility, and cured physical properties desired of commercial EPDM pipe flashing compositions.

Claims20

Dependent claims

A premolded pipe flashing composition comprising:

100 parts by weight of an elastomeric polymer comprising
from about 70 to about 95 parts by weight of at least one essentially amorphous ethylene-propylene-diene terpolymer;
and
from about 5 to about 30 parts by weight of at least one essentially crystalline or semi-crystalline ethylene-propylene-diene terpolymer having at least about 3 weight percent unsaturation;
from about 35 to about 175 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing fillers and mixtures thereof, per 100 parts of said polymer;
from about 30 to about 110 parts by weight of a processing material selected from the group consisting of paraffinic oils, naphthenic oils and waxes and mixtures thereof, per 100 parts of said polymer;
and
from about 0.6 to about 7.5 parts by weight of a cure package, per 100 parts of said polymer, said cure package comprising from about 0.1 to 1.5 parts by weight sulfur and from about 0.5 to 6 parts by weight of at least one sulfur vulcanizing accelerator.

5 more elements

A method for developing a water-tight seal around an object protruding from the top of a roof comprising the step of:

positioning a premoled EPDM pipe flashing around said protruding object such that a portion of said pipe flashing is in contact with said object and another portion of said pipe flashing is in contact with said roof, said pipe flashing comprising
100parts by weight of an elastomeric polymer comprising
from about 70 to 95 parts by weight of at least one amorphous ethylene-propylene-diene terpolymer;
and
from 5 to about 30 parts by weight of at least one crystalline or semi-crystalline ethylene-propylene-diene terpolymer;
from about 35 to 175 parts by weight of a filler selected from the group consisting of reinforcing and non-reinforcing materials and mixtures thereof, per 100 parts of the polymer;
from about 30 to 110 parts by weight of a processing material and mixtures thereof, per 100 parts of the polymer;
and
from about 0.6 to 7.5 parts by weight of a cure package per 100 parts of the polymer, the cure package comprising from about 0.1 to 1.5 parts by weight sulfur and from about 0.5 to 6 parts by weight of at least one sulfur vulcanizing accelerator.

6 more elements

Dependencies are inferred from the claim text.

Premolded pipe flashing compositions

Life of this patent

Premolded pipe flashing compositions

Life of this patent

Abstract

Claims20