Adhesive article

Abstract

An adhesive article comprises a rupturable container and a moisture-curable composition. The rupturable container defines an enclosed cavity. The moisture-curable composition is disposed within the enclosed cavity. The moisture-curable composition comprises a prepolymer comprising the reaction product of an isocyanate component and an isocyanate-reactive component. The moisture-curable composition further comprises a catalyst component and an acid halide component. The adhesive article may be used in various industries and for various applications, such as for construction and remodeling of commercial, industrial, and residential buildings.

1 . An adhesive article comprising:
 A) a rupturable container defining an enclosed cavity; and   B) a moisture-curable composition disposed within said enclosed cavity, said moisture-curable composition comprising
 i) a prepolymer comprising the reaction product of
 an isocyanate component, and 
 an isocyanate-reactive component, 
 
 ii) a catalyst component, and 
 iii) an acid halide component. 
   
   
   
       2 . An adhesive article as set forth in  claim 1  wherein said acid halide component iii) comprises a haloformate. 
   
   
       3 . An adhesive article as set forth in  claim 2  wherein said haloformate is diethylene glycol bischloroformate. 
   
   
       4 . An adhesive article as set forth in  claim 1  wherein said acid halide component iii) comprises a benzoyl halide. 
   
   
       5 . An adhesive article as set forth in  claim 4  wherein said benzoyl halide is t-butyl benzoyl chloride. 
   
   
       6 . An adhesive article as set forth in  claim 1  wherein said catalyst component ii) comprises an organometallic catalyst. 
   
   
       7 . An adhesive article as set forth in  claim 6  wherein said organometallic catalyst is a dibutyltin dilaurate. 
   
   
       8 . An adhesive article as set forth in  claim 1  wherein said catalyst component ii) and said acid halide component iii) are present in said moisture-curable composition B) in a weight ratio of from about 1:1 to about 4:1. 
   
   
       9 . An adhesive article as set forth in  claim 8  wherein said acid halide component iii) comprises a haloformate. 
   
   
       10 . An adhesive article as set forth in  claim 9  wherein said catalyst component ii) comprises an organometallic catalyst. 
   
   
       11 . An adhesive article as set forth in  claim 1  wherein said isocyanate component is selected from the group of polymeric diphenylmethane diisocyanates, diphenylmethane diisocyanates, toluene diisocyanates, hexamethylene diisocyanates, isophorone diisocyanates, and combinations thereof. 
   
   
       12 . An adhesive article as set forth  claim 1  wherein said isocyanate component comprises a polymeric diphenylmethane diisocyanate (pMDI) and a diphenyl-methane diisocyanate (MDI). 
   
   
       13 . An adhesive article as set forth in  claim 1  wherein said isocyanate-reactive component comprises a polyol having at least two hydroxyl functional groups reactive with said isocyanate component. 
   
   
       14 . An adhesive article as set forth in  claim 13  wherein said polyol is a polypropylene glycol. 
   
   
       15 . An adhesive article as set forth in  claim 14  wherein said polypropylene glycol has a hydroxyl number of from about 50 to about 60 mg KOH/gm. 
   
   
       16 . An adhesive article as set forth in  claim 1  wherein said prepolymer i) has a free NCO functional group content of at least about 5% by weight based on 100 parts by weight of said prepolymer i). 
   
   
       17 . An adhesive article as set forth in  claim 1  wherein said moisture-curable composition B) has a viscosity of from about 5,000 to about 12,000 cP at 25° C. according to ASTM D2196. 
   
   
       18 . An adhesive article as set forth in  claim 1  wherein said rupturable container A) ruptures under pressure. 
   
   
       19 . An adhesive article as set forth in  claim 1  wherein said rupturable container A) includes a first layer and a second layer opposite said first layer with said layers affixed along an outer peripheral portion extending between an edge and said enclosed cavity of said rupturable container A). 
   
   
       20 . An adhesive article as set forth in  claim 1  wherein said rupturable container A) has a unitary layer affixed along an outer peripheral portion extending between an edge and said enclosed cavity of said rupturable container A). 
   
   
       21 . An adhesive article as set forth in  claim 1  wherein said rupturable container A) is formed from a plastic material selected from the group of polyethylenes, biaxially-oriented polyethylene terephthalate polyesters, polyolefins, polyethylene terephthalate copolyesters, metallocene polyolefins, thermoplastic olefins, styrenic block copolymers, polyvinyl chlorides, polyethylene terephthalates, polyvinylchlorides, cellulose acetates, polyvinylidene chlorides, polystyrenes, polychlorotrifluoroethylenes, and combinations thereof. 
   
   
       22 . An adhesive article as set forth in  claim 1  wherein said rupturable container A) is formed from a thermoplastic polyurethane (TPU) elastomer. 
   
   
       23 . An adhesive article as set forth in  claim 22  wherein said TPU elastomer is selected from the group of polyether-based thermoplastic polyurethanes, polyester-based thermoplastic polyurethanes, and combinations thereof. 
   
   
       24 . An adhesive article as set forth in  claim 22  wherein said TPU elastomer has an ultimate tensile strength of from about 30 to about 60 MPa according to ASTM D-412. 
   
   
       25 . An adhesive article as set forth in  claim 22  wherein said TPU elastomer has an elongation at break of from about 450 to about 600% according to ASTM D-412. 
   
   
       26 . An adhesive article as set forth in  claim 22  wherein said TPU elastomer has a tear strength of from about 75 to about 125 N/mm according to ASTM D-624, Die C. 
   
   
       27 . An adhesive article as set forth in  claim 22  wherein said rupturable container A) is formed from a film comprising said TPU elastomer. 
   
   
       28 . An adhesive article as set forth in  claim 27  wherein said film has a thickness of from about 0.1 to about 10 mils. 
   
   
       29 . An adhesive article comprising:
 A) a rupturable container defining an enclosed cavity, said rupturable container formed from a film comprising a thermoplastic polyurethane (TPU) elastomer; and,   B) a moisture-curable composition disposed within said enclosed cavity, said composition comprising
 i) a prepolymer comprising the reaction product of
 a polymeric diphenylmethane diisocyanate (pMDI), 
 a diphenylmethane diisocyanate (MDI), and 
 a polyol having at least two hydroxyl functional groups, 
 
 ii) a catalyst component comprising an organometallic catalyst, and 
 iii) an acid halide component. 
   
   
   
       30 . An adhesive article as set forth in  claim 29  wherein said organometallic catalyst and said acid halide component iii) are present in said moisture-curable composition in a weight ratio of from about 1:1 to about 4:1. 
   
   
       31 . An adhesive article as set forth in  claim 30  wherein said acid halide component iii) comprises a haloformate. 
   
   
       32 . An adhesive article as set forth in  claim 31  wherein said haloformate is diethylene glycol bischloroformate. 
   
   
       33 . An adhesive article as set forth in  claim 30  wherein said organometallic catalyst is a dibutyltin dilaurate. 
   
   
       34 . An adhesive article as set forth in  claim 29  wherein said polyol is a polypropylene glycol. 
   
   
       35 . An adhesive article as set forth in  claim 34  wherein said polypropylene glycol has a hydroxyl number of from about 50 to about 60 mg KOH/gm. 
   
   
       36 . An adhesive article as set forth in  claim 30  wherein said rupturable container A) ruptures under pressure. 
   
   
       37 . An adhesive article as set forth in  claim 29  wherein said TPU elastomer is selected from the group of polyether-based thermoplastic polyurethanes, polyester-based thermoplastic polyurethanes, and combinations thereof. 
   
   
       38 . An adhesive article as set forth in  claim 29  wherein said TPU elastomer has an ultimate tensile strength of from about 30 to about 60 MPa according to ASTM D-412. 
   
   
       39 . An adhesive article as set forth in  claim 29  wherein said TPU elastomer has an elongation at break of from about 450 to about 600% according to ASTM D-412. 
   
   
       40 . An adhesive article as set forth in  claim 29  wherein said TPU elastomer has a tear strength of from about 75 to about 125 N/mm according to ASTM D-624, Die C. 
   
   
       41 . An adhesive article as set forth in  claim 29  wherein said film has a thickness of from about 0.1 to about 10 mils. 
   
   
       42 . An adhesive article as set forth in  claim 29  wherein said rupturable container A) includes a first layer and a second layer opposite said first layer with said layers affixed along an outer peripheral portion extending between an edge and said enclosed cavity of said rupturable container A). 
   
   
       43 . An adhesive article as set forth in  claim 29  wherein said film is affixed along an outer peripheral portion extending between an edge and said enclosed cavity of said rupturable container A).