Reactive hot melt adhesive with bituminous additive
View Patent ↗A polyurethane hot melt adhesive composition comprising an isocyanate, one or more polyols, one or more bituminous materials and optionally one or more thermoplastic materials. Another embodiment is directed to a method for bonding materials together which comprises applying the reactive hot melt adhesive composition in a liquid form to a first substrate, bringing a second substrate in contact with the composition applied to the first substrate, and subjecting the applied composition to conditions which will allow the composition to cool and cure to an irreversible solid form, said conditions comprising moisture. Still another aspect is directed to an article of manufacture comprising the adhesive.
1. A moisture curable reactive hot melt adhesive composition comprising an isocyanate, one or more polyols, one or more bituminous materials, one or more thermoplastic materials and without utilizing a compatabilizing plasticizer or a tackifier.
2. The reactive hot melt adhesive of claim 1 , wherein the bituminous materials are selected from the group consisting of asphalt, polymer modified asphalt, oxidized asphalt, hot mix asphalt, performance grade asphalt, coal tar and mixtures thereof.
3. The reactive hot melt adhesive of claim 2 , comprising an asphalt modified with one or more polymers selected from the group consisting of polyethylenes, polypropylenes, polystyrenes, different block, graft and random copolymers, virgin rubber, rubber from crumb rubber and mixtures thereof.
4. The reactive hot melt adhesive of claim 1 , wherein the polyols are selected from the group consisting of polyester polyols, polyether polyols, castor oil and vegetable oils of different molecular weight and functionality, other fatty polyols, polybutadiene diol, polyisobutylene diol and mixtures thereof.
5. The reactive hot melt adhesive of claim 1 , wherein the thermoplastic materials are selected from the group consisting of ethylene vinyl acetate copolymer (EVA), ethylene vinyl acetate terpolymers, functional EVA, ethylene acrylate copolymer, acrylic polymers, functional acrylic polymers, non-functional acrylic polymers, acrylic block copolymer, acrylic polymer having tertiary-alkyl amide functionality, polysiloxane polymers, polyesters, polystyrene copolymers, polyvinyl polymers, divinylbenzene copolymers, polyetheramides, polyvinyl acetal, polyvinyl butyral, polyvinyl acetate, polyvinyl chloride, methylene polyvinyl ether, cellulose acetate, styrene acrylonitrile, amorphous polyolefin, thermoplastic urethane, polyacrylonitrile, ethylene butadiene copolymers and/or block copolymers, styrene butadiene block copolymer, and mixtures thereof.
6. The reactive hot melt adhesive of claim 1 , further comprising one or more additives selected from the group consisting of defoamers, curing catalysts, dissociation catalysts, fillers, rheology modifiers, anti-oxidants, pigments, adhesion promoters, stabilizers, aliphatic C5-C10 terpene oligomers, rosin, rosin ester, aliphatic hydrocarbons, aromatic hydrocarbons, aromatically modified aliphatic hydrocarbons, terpenes, terpene phenol, modified terpene, multifunctional phenols such as sulfur and phosphorous-containing phenol, terpene oligomers, DMDEE, paraffin waxes, microcrystalline waxes, hydrogenated castor oil, flame retardant components and mixtures thereof.
7. The reactive hot melt adhesive of claim 1 , wherein the one or more polyols are present in an amount ranging from about 2 to about 98 weight % of the adhesive.
8. The reactive hot melt adhesive of claim 7 , wherein the one or more polyols are present in an amount ranging from about 2 to about 80 weight % of the adhesive.
9. The reactive hot melt adhesive of claim 8 , wherein the one or more polyols are present in an amount ranging from about 5 to about 50 weight % of the adhesive.
10. The reactive hot melt adhesive of claim 1 , wherein the one or more bituminous materials are present in an amount ranging from about 0.1 to about 80 weight % of the adhesive.
11. The reactive hot melt adhesive of claim 10 , wherein the one or more bituminous materials are present in an amount ranging from about 5 to about 50 weight % of the adhesive.
12. The reactive hot melt adhesive of claim 11 , wherein the one or more bituminous materials are present in an amount ranging from about 10 to about 40 weight % of the adhesive.
13. The reactive hot melt adhesive of claim 1 , wherein the one or more thermoplastic materials are present in an amount of up to about 40 weight % of the adhesive.
14. A method of bonding at least two components together using the adhesive of claim 1 .
15. An article of manufacture containing the adhesive of claim 1 .