Fast and elastic adhesive
The present invention relates to a fast and elastic adhesive. Said adhesive includes two components, one including a monomer having an alkoxyalkyl ester group, a thickener, a thixotropic agent and a stabilizing agent. In the other component, a plasticizing agent, a thixotropic agent, and an initiating agent are included. This adhesive can be used to practically instantaneously bond substrates that can move relative to one another, or which may be bent or have the ability to absorb an impact, or to seal.
1. A cyanoacrylate composition, comprising:
1) a component A comprising:
a. a compound of general formula (I)
wherein
A is selected from the group consisting of CN, CO 2 Me and CO 2 Et, and
D is a group defined by the general formula (II)
wherein
R 1 is selected from the group consisting of H and Me,
R 2 is selected from the group consisting of Si(Me 3 ) 3 , and a C 1 -C 6 linear or branched alkyl chain, and
n is between 1 and 3,
optionally combined with a compound of general formula (III)
wherein
E is selected from the group consisting of CN, CO 2 Me and CO 2 Et, and
G is a carboxylic ester moiety CO 2 R 3 , wherein R 3 is selected from the group consisting of: C 1 -C 18 linear or branched alkyl chain, trimethylsilylated C 1 -C 3 alkyl chain, allyl, propargyl, cyclohexyl, cyclohexenyl, methylcyclohexyl, methylcyclohexenyl, ethylcyclohexyl, ethylcyclohexenyl, furfuryl, phenylethyl, phenoxyethyl, and acrylic ester moiety,
b. a thickener,
c. a thixotropic agent selected from the group consisting of hydrogenated castor oil, hydrogenated castor oil modified by reaction with an amine, polyamides, and silica,
d. a stabilizing agent, and
2) a component B comprising:
a. a plasticizing agent selected from the group consisting of esters of C 2 -C 4 carboxylic acids with C 2 -C 5 alkyl alcohols having 2-4 hydroxyl groups,
b. an initiating agent, and
c. a thixotropic agent selected from the group consisting of hydrogenated castor oil, hydrogenated castor oil modified by reaction with an amine, polyamides, and silica.
2. The composition according to claim 1 , wherein the compound of general formula (I) is 2-methoxyethyl cyanoacrylate, 2-ethoxyethyl cyanoacrylate, or 2-(1-methoxy)propyl cyanoacrylate.
3. The composition according to claim 1 , wherein the thickener is selected from the group consisting of poly(meth)acrylates, polyvinylpyrrolidones, polyvinyl acetates, partially hydrolysed polyvinyl acetates, vinyl acetate copolymers, and acylated cellulose polymers.
4. the composition according to claim 1 , wherein the thixotropic agent of component A and/or component B is silica selected from the group consisting of fumed silica, hydrophobic fumed silica, hydrophilic fumed silica and precipitated silica.
5. The composition according to claim 1 , wherein the thixotropic agent of component A and/or component B is selected from the group consisting of hydrogenated castor oil, hydrogenated castor oil modified by reaction with an amine, and polyamides.
6. The composition according to claim 5 , further comprising an accelerating agent and a plasticizing agent.
7. The composition according to claim 6 , wherein the accelerating agent is selected from the group consisting of crown ether, silylated crown ethers; calixarenes; tetra-t-butyl esters; and dimethyl ethers of PEG 400, PEG 500, PEG 600 and PEG 1000.
8. The composition according to claim 6 , wherein the plasticizing agent is selected from the group consisting of esters of C 2 -C 4 carboxylic acids with C 2 -C 5 alkyl alcohols having 2-4 hydroxyl groups.
9. The composition according to claim 1 , wherein the stabilizing agent is selected from the group consisting of radical stabilizing agents, acid stabilizing agents, and mixtures thereof.
10. The composition according to claim 1 , wherein the component B comprises a plasticizing agent selected from glycerine triacetate and ethylene glycol diacetate.
11. The composition according to claim 1 , wherein the initiating agent is selected from the group consisting of xanthines, quaternary ammonium salts, metal salts of carboxylic acids, and mixtures thereof.
12. The composition of claim 1 , wherein the composition forms an adhesive.
13. A bonding, repair, or sealing method that comprises:
1) combining from 1 to 4 parts by volume of component A and 1 part by volume of component B of the composition of claim 1 ,
2) applying this mixture to a joint or on an upper part of a first substrate and, optionally
3) assembling a second substrate atop the first substrate.
14. The method of claim 13 , wherein an elastic material is formed.
15. An adhesive that comprises the composition of claim 1 .