Asphalt-based reactive hot melt polyurethane adhesive
A novel hot melt adhesive that includes a blend of hot melt polyurethane and petroleum liquid.
1. A hot melt adhesive that includes a blend of three primary components, a first primary component is an isocyanate compound, a second primary component is petroleum liquid, a third primary component is polyol compound, said petroleum liquid selected from the group consisting of asphalt, modified asphalt, bitumen, modified bitumen, coal-tar, modified coal tar, or mixtures thereof, said isocyanate compound including one or more compounds selected from the group consisting of diisocyanate and polyisocyanate, said polyol compound including one or more compounds selected from the group consisting of polyester-polyol, polypropylene glycol, polybutylene glycol, olefinically unsaturated monomers, and alkylene diols, said polyol compound having a weight percent that is greater than a combined weight percent of said petroleum liquid and said isocyanate compound, said hot melt adhesive including one or more compounds selected form the group consisting of an acid stabilizer, a catalyst, and a tackifying agent, said hot melt adhesive comprising:
Acid stabilizer
0.005-0.5
wt %
Catalyst
0.005-1.5
wt %
Propylene Glycol (800-1200 MW)
22-27
wt %
Propylene Glycol (1800-2400 MW)
22-27
wt %
Polyester Polyol
20-23
wt %
MDI
15-18
wt %
Type III Asphalt
5-21
wt %
Tackifying resin
0.1-8
wt %.
2. The hot melt adhesive as defined in claim 1 , wherein a weight ratio of said petroleum liquid to said polyol compound is about 0.06-0.98:1.
3. The hot melt adhesive as defined in claim 2 , wherein a weight ratio of said petroleum liquid to said polyol compound is up to about 0.7:1.
4. The hot melt adhesive as defined in claim 3 , wherein a weight ratio of said petroleum liquid to said polyol compound is up to about 0.6:1.
5. The hot melt adhesive as defined in claim 1 , wherein a weight ratio of said isocyanate compound to said polyol compound is about 0.08-0.9:1.
6. The hot melt adhesive as defined in claim 5 , wherein a weight ratio of said isocyanate compound to said polyol compound is up to about 0.65:1.
7. The hot melt adhesive as defined in claim 6 , wherein a weight ratio of said isocyanate compound to said polyol compound is up to about 0.5:1.
8. The hot melt adhesive as defined in claim 4 , wherein a weight ratio of said isocyanate compound to said polyol compound is up to about 0.5:1.
9. The hot melt adhesive as defined in claim 1 , comprising:
Acid stabilizer
0.01-0.4
wt %
Catalyst
0.005-1
wt %
Propylene Glycol (800-1200 MW)
10-25
wt %
Propylene Glycol (1800-2400 MW)
10-25
wt %
Polyester Polyol
10-20
wt %
Acrylic Copolymer
10-25
wt %
MDI
10-20
wt %
Type I-III Asphalt
5-50
wt %
Tackifying resin
0.1-6
wt %.
10. The hot melt adhesive as defined in claim 8 , comprising:
Acid stabilizer
0.01-0.4
wt %
Catalyst
0.005-1
wt %
Propylene Glycol (800-1200 MW)
10-25
wt %
Propylene Glycol (1800-2400 MW)
10-25
wt %
Polyester Polyol
10-20
wt %
Acrylic Copolymer
10-25
wt %
MDI
10-20
wt %
Type I-III Asphalt
5-50
wt %
Tackifying resin
0.1-6
wt %.
11. The hot melt adhesive as defined in claim 1 , comprising:
Acid stabilizer
0.01-0.2
wt %
Catalyst
0.005-0.5
wt %
Propylene Glycol (800-1200 MW)
15-20
wt %
Propylene Glycol (1800-2400 MW)
15-20
wt %
Polyester Polyol
12-27
wt %
Acrylic Copolymer
15-20
wt %
MDI
15-18
wt %
Type III Asphalt
5-28
wt %
Tackifying resin
0.2-6
wt %.
12. The hot melt adhesive as defined in claim 8 , comprising:
Acid stabilizer
0.01-0.2
wt %
Catalyst
0.005-0.5
wt %
Propylene Glycol (800-1200 MW)
15-20
wt %
Propylene Glycol (1800-2400 MW)
15-20
wt %
Polyester Polyol
12-27
wt %
Acrylic Copolymer
15-20
wt %
MDI
15-18
wt %
Type III Asphalt
5-28
wt %
Tackifying resin
0.2-6
wt %.