Elastic methacrylate compositions

Abstract

A two-part adhesive composition exhibiting improved elasticity wherein its composition includes one or more acrylate or methacrylate ester monomers, a sulfur bearing compound, preferably a sulfonyl chloride, an amine promoter, preferably, an amine aldehyde reaction product, and a thermoplastic block copolymer component selected from the group consisting of a. a linear styrene-butadiene-styrene copolymer b. a radial styrene-butadiene-styrene block copolymer with a plasticizer, c. a linear or radial styrene-isoprene-styrene block copolymer, and d. a linear or radial styrene-butadiene-isoprene-styrene block copolymer, and mixtures thereof.

1 . A two-part adhesive composition capable of being mixed in a 1:1 ratio to form elastic or ductile adhesives comprising 
 one or more acrylate or methacrylate ester monomers, a sulfur bearing compound, an amine promoter, and a thermoplastic block copolymer component selected from the group consisting of 
 a. a linear styrene-butadiene-styrene copolymer,  
 b. a radial styrene-butadiene-styrene block copolymer with a plasticizer,  
 c. a linear or radial styrene-isoprene-styrene block copolymer,  
 d. a linear or radial styrene-butadiene-isoprene-styrene block copolymer, and mixtures thereof.  
   
   
   
       2 . The two-part adhesive of  claim 1  further comprising an adhesion promoting polymer.  
   
   
       3 . The two-part adhesive of  claim 2  wherein the adhesion promoting polymer comprises a chlorinated polymer.  
   
   
       4 . The two-part adhesive of  claim 3  wherein the chlorinated polymer is selected from the group consisting of chlorosulfonated polyethylene, chlorinated polyethylene, polychloroprene polymers and mixtures thereof.  
   
   
       5 . The two-part adhesive of  claim 1 , wherein the sulfur bearing compound comprises sulfonyl chloride.  
   
   
       6 . The two-part adhesive of  claim 1 , wherein the amine promoter comprises an amine aldehyde reaction product or dihydropyridine.  
   
   
       7 . The two-part adhesive of  claim 1 , further comprising an impact modifier.  
   
   
       8 . The two-part adhesive of  claim 7 , wherein the impact modifier comprises a core shell impact modifier.  
   
   
       9 . The two-part adhesive of  claim 1 , wherein the acrylate or methacrylate ester monomers are selected from the group consisting of methyl methacrylate monomer, and higher molecular weight acrylate and methacrylate monomers, wherein the alcohol portion of the monomer is based on a C 6  or higher hydrocarbon moiety and mixtures thereof.  
   
   
       10 . The two-part adhesive of  claim 1 , wherein the acrylate or methacrylate ester monomer comprises lauryl methacrylate.  
   
   
       11 . The two-part adhesive composition of claim  1  further comprising an initiator selected from the group consisting of sulfur bearing compounds, peroxides and mixtures thereof.  
   
   
       12 . The two-part adhesive composition of  claim 11 , wherein the peroxides are selected from the group consisting of cumene hydroperoxide, methyl ethyl ketone peroxide, benzoate esters, including t-butyl perbenzoate, and mixtures thereof.  
   
   
       13 . The two-part adhesive of  claim 11 , wherein the initiator does not include benzoyl peroxide.  
   
   
       14 . The two-part adhesive composition of  claim 1  further comprising an activator comprising adducts of butyraldehyde and aniline.  
   
   
       15 . A two-part adhesive composition capable of being mixed in a 1:1 ratio to form elastic or ductile adhesives comprising 
 from about 20 to about 90% by weight of one or more acrylate or methacrylate ester monomers, from about 0.02 to about 30% by weight of a sulfur bearing compound, from about 0.05 to about 10% by weight of an amine promoter, and from about 5 to about 50% by weight of a thermoplastic block copolymer component selected from the group consisting of 
 a. a linear styrene-butadiene-styrene copolymer,  
 b. a radial styrene-butadiene-styrene block copolymer with a plasticizer,  
 c. a linear or radial styrene-isoprene-styrene block copolymer,  
 d. a linear or radial styrene-butadiene-isoprene-styrene block copolymer, and mixtures thereof.  
   
   
   
       16 . The two-part adhesive composition of  claim 15  that does not include benzoyl peroxide.  
   
   
       17 . A two-part adhesive composition capable of being mixed in a 1:1 ratio to form elastic or ductile adhesives comprising 
 from about 20 to about 90% by weight of one or more acrylate or methacrylate ester monomers, from about 0.02 to about 30% by weight of a sulfur bearing compound, from about 0.05 to about 10% by weight of an amine promoter, an adhesion promoter, and from about 5 to about 50% by weight of a thermoplastic block copolymer component selected from the group consisting of 
 a. a linear styrene-butadiene-styrene copolymer,  
 b. a radial styrene-butadiene-styrene block copolymer with a plasticizer,  
 c. a linear or radial styrene-isoprene-styrene block copolymer,  
 d. a linear or radial styrene-butadiene-isoprene-styrene block copolymer,  
   and mixtures thereof, but without the use of benzoyl peroxide.    
   
   
       18 . A process for the formation of an adhesive with an 1:1 ratio comprising 
 preparing component A comprising one or more methacrylate or acrylate ester monomers, and a sulfur bearing compound,    preparing component B, comprising one or more acrylate or methacrylate ester monomers and an amine promoter or activator,    wherein either component A or component B or both further comprise a thermoplastic block copolymer component selected from the group consisting of 
 a. a linear styrene-butadiene-styrene copolymer,  
 b. a radial styrene-butadiene-styrene block copolymer with a plasticizer,  
 c. a linear or radial styrene-isoprene-styrene block copolymer,  
 d. a linear or radial styrene-butadiene-isoprene-styrene block copolymer, and mixtures thereof,  
   wherein the ratio of component A to component B is about 1:1, and    mixing component A with component B to form an adhesive composition.    
   
   
       19 . The process of  claim 18 , wherein benzoyl peroxide is not used with either component A or component B.  
   
   
       20 . The process of  claim 18  further comprising adding an adhesion promoter to component A or B or both.