Claims
- 1. A two-part adhesive composition comprising an adhesive part and an activator part, wherein said adhesive part comprises acrylic and/or methacrylic monomers, reducing agents and an inhibitor, wherein said activator part comprises at least one initiator, and wherein said reducing agents consist of at least one reducing agent selected from the group consisting essentially of anilines, toluidines, substituted anilines and substituted toluidines, and wherein said adhesive part and said activator part are combinable to form said adhesive composition, wherein said adhesive composition has a working time of approximately 40 minutes or longer at a temperature of 95° C.
- 2. The adhesive composition of claim 1, wherein said adhesive part further comprises, as may be advantageous, toughening agents, impact modifiers, carboxylic acids, retarders and/or chain transfer agents, and wherein said activator part further comprises, as may be advantageous, carriers, thickening agents and/or pigments, thus resulting in an adhesive composition which exhibits resistance to sliding, is non-sagging, does not boil while curing and, once cured, exhibits superior qualities of bonding strength, impact strength, tensile strength and elongation.
- 3. The adhesive composition of claim 1 wherein said acrylic and/or methacrylic monomers are of the following general structure:
Methacrylate esters: 8and Acrylate esters: CH2═CH—COOR, where R=CnH2n+1, and when n=1, 2, 3, . . . 20, and wherein low molecular weight monomers are those of said monomers where n≦2, and high molecular weight monomers are those of said monomers where n>2.
- 4. The low molecular weight monomers of claim 3 wherein n=1.
- 5. The high molecular weight monomers of claim 3 wherein n=10 to 18.
- 6. The adhesive composition of claim 3 wherein said low molecular weight monomers are present in a range of from 80 to 100 weight percent of the monomers, and wherein said high molecular weight monomers are present in a range of from 0 to 20 weight percent of the monomers.
- 7. The adhesive composition of claim 3 wherein said low molecular weight monomers are present in a range of from 86 to 100 weight percent of the monomers, and wherein said high molecular weight monomers are present in a range of from 0 to 14 weight percent of the monomers.
- 8. The adhesive composition of claim 1 wherein said adhesive part comprises said acrylate and/or methacrylate monomers in a range of about 55% to 75% by weight.
- 9. The adhesive composition of claim 1 wherein said adhesive part comprises acrylate and/or methacrylate monomers in a range of 58% to 68% by weight.
- 10. The adhesive composition of claim 1 wherein said adhesive part comprises acrylate and/or methacrylate monomers in a range of 60% to 65% by weight.
- 11. The adhesive composition of claim 1, wherein said reducing agent comprises at least one aniline having the following formula:
- 12. The adhesive composition of claim 1, wherein said reducing agent comprises at least one ortho-toluidine and/or meta-toluidine having the following formula:
- 13. The adhesive composition of claim 1, wherein said substituted aniline of said reducing agent comprises at least one substituted meta-aniline and/or one substituted para-aniline having one of the following general formulas:
- 14. The adhesive composition of claim 1, wherein said reducing agent comprises at least one substituted meta-toluidine and/or one substituted para-toluidine having one of the following formulas:
- 15. The adhesive composition of claim 1, wherein said reducing agent may comprise up to 30 weight percent of reducing agent of at least one para-toluidine having the following formula:
- 16. The adhesive composition of claim 1, wherein said reducing agent may comprise up to 30 weight percent of reducing agent of at least one substituted para-toluidine having the following formula:
- 17. The adhesive composition of claim 1, wherein said reducing agent may comprise up to 30 weight percent of at least one substituted para-toluidine having the following formula:
- 18. The adhesive composition of claim 1, wherein said adhesive part comprises said reducing agent in a range of about 0.02% to about 1% by weight of adhesive part.
- 19. The adhesive composition of claim 1, wherein said adhesive part comprises said reducing agent in a range of 0.05% to 0.8% by weight of adhesive part.
- 20. The adhesive composition of claim 1, wherein said adhesive part comprises said reducing agent in a range of 0.1% to 0.4% by weight of adhesive part.
- 21. The adhesive composition of claim 2, wherein said adhesive part comprises toughening agents in the range of about 1% to about 20% by weight, impact modifiers in the range of about 18% to about 38% by weight, carboxylic acids in a range of 0% to about 10% by weight, and wherein said carboxylic acids can be one or more carboxylic acids, inhibitors in the range of about 0.001% to about 0.15% by weight, retarders in the range of about 0.001% to about 15% by weight and chain transfer agents in the range of 0% to about 1% by weight.
- 22. The adhesive composition of claim 2, wherein said adhesive part comprises toughening agents in the range of 2% to 16% by weight, impact modifiers in the range of 24% to 34% by weight, carboxylic acids in a range of 0.5% to 6% by weight, and wherein said carboxylic acids can be one or more said carboxylic, inhibitors in the range of 0.005% to 0.1% by weight, retarders in the range of 0.005% to 0.1% by weight, and chain transfer agents in the range of 0.2% to 0.8% by weight.
- 23. The adhesive composition of claim 2, wherein said adhesive part comprises said toughening agents in the range of 3% to 10% by weight, impact modifiers in the range of 28% to 32% by weight, carboxylic acids in a range of 1% to 3% by weight, and wherein said carboxylic acids can be one or more said carboxylic acids, inhibitors in the range of 0.01% to 0.08% by weight, retarders in the range of about 0.01% to about 0.08% by weight, and chain transfer agents in the range of 0.4% to 0.6% by weight.
- 24. The adhesive composition of claim 2 wherein said carboxylic acids are comprised of methacrylic acid.
- 25. The adhesive composition of claim 2, wherein said toughening agents are comprised of synthetic polymers selected from the group consisting essentially of polychloroprene, copolymers of butadiene with other monomers such as acrylonitrile, copolymers of isoprene with styrene, acrylonitrile, acrylate esters, methacrylate esters, copolymers of ethylene and acrylate esters, homopolymers of epichlorohydrin and copolymers of epichlorohydrin and ethylene.
- 26. The adhesive composition of claim 2, wherein said toughening agents are comprised of polymers selected from the group consisting essentially of polychloroprene with block copolymers of styrene and butadiene or isoprene, and block copolymers of styrene and diene monomers.
- 27. The adhesive composition of claim 2, wherein said impact modifiers are core-shell graft copolymers.
- 28. The adhesive composition of claim 1, wherein the activator part includes an initiator comprising free radical generators, including those selected from the group consisting essentially of dibenzoyl peroxide, cumene hydroperoxide, tertiary butyl hydroperoxide, dicumyl peroxide, tertiary butyl peroxide acetate, tertiary butyl perbonzoate, ditertiary butyl azodiisobutyronotrile.
- 29. The adhesive composition of claim 1, wherein said initiator is dibenzoyl peroxide.
- 30. The adhesive composition of claim 1, wherein the mole ratio of said initiators to said reducing agents is in the range of 2.2 to 10.
- 31. The adhesive composition of claim 1, wherein the mole ratio of said initiators to said reducing agents is in the range of 3.3 to 5.
- 32. The adhesive composition of claim 1, wherein the volume ratio of the adhesive part to the activator part is from 7:1 to 15:1.
- 33. The adhesive composition of claim 1, wherein the volume ratio of the adhesive part to the activator part is from 10:1.
- 34. The adhesive composition of claim 1, wherein the effective working times are approximately 40 to 80 minutes at 95° F.
- 35. The adhesive composition of claim 1, which does not boil during curing for a bead size of up to approximately 1 inch.
- 36. A two-part adhesive composition comprising an adhesive part and an activator part, wherein said adhesive part comprises acrylic and/or methacrylic monomers, reducing agents and an inhibitor, wherein said activator part comprises at least one initiator, and wherein said reducing agents consist of at least one of said reducing agents selected from the group consisting essentially of:
a) At least one aniline having the following formula: 16wherein R′ and R″ are —CH3 or —C2H5 and may be same or different, b) At least one ortho-toluidine and/or meta-toluidine having the following formula: 17wherein for ortho-toluidines, R′ and R″ are only —CH3, for meta-toluidines, R′ and R″ are —CH3, or CH2CHY2, where Y is H, a weak electron-releasing group or a strong electron-withdrawing group selected from alkyl groups with C1 to C6, OH, CN, a halogen, OCnH2n+1 with n less than 4, OOCCH3 and wherein R′ and R″ may be the same or different, c) At least one substituted meta-aniline and/or one substituted para-aniline having one of the following general formulas: 18wherein R′41 is a halogen, OR where R has C1 to C6, COOCnH2n+1 with n up to 10 and R′ and R″ are —CH3 or —C2H5 and wherein R′ and R″ may be same or different, d) At least one substituted meta-toluidine and/or one substituted para-toluidine having one of the following formulas: 19where R′″ is CHZ′Z″ or CH2Z′, where Z′ and/or Z″ is an alkyl group with C1 to C6, a halogen, OH, OR where R has C1 to C6, COOCnH2n+1 with n up to 10, and the like, wherein Z′ and/or Z″ may be the same, and wherein R′ and R″ are —CH3, or CH2CHY2, where Y is H, a weak electron-releasing group or a strong electron-withdrawing group selected from alkyl groups with C1 to C6, OH, CN, a halogen, OCnH2n+1 with n less than 4, OOCCH3 and wherein R′ and R″ may be the same or different, e) Up to 30 weight percent total reducing agent of at least one para-toluidine having the following formula: 20wherein R′ and R″ are —CH3, or CH2CHY2, where Y is H, a weak electron-releasing group or a strong electron-withdrawing group selected from alkyl groups with C1 to C6, OH, CN, a halogen, OCnH2n+1 with n less than 4, OOCCH3 and R′ and R″ may be the same or different, f) Up to 30 weight percent total reducing agent of at least one substituted para-toluidine having the following formula: 21wherein R′ and R″ are —CH3, or CH2CHY2, where Y is H, a weak electron-releasing group or a strong electron-withdrawing group selected from alkyl groups with C1 to C6, OH, CN, a halogen, OCnH2n+1 with n less than 4, OOCCH3 and R′ and R″ may be the same or different, and wherein Z is either an electron releasing group or an electron withdrawing group with molecular weight less than 300, and the three Zs may be the same or different, and g) Up to 30 weight percent total reducing agent of at least one substituted para-toluidine having the following formula, 22wherein R′ and R″ are —CH3, or CH2CHY2, where Y is H, a weak electron-releasing group or a strong electron-withdrawing group selected from alkyl groups with C1 to C6, OH, CN, a halogen, OCnH2n+1 with n less than 4, OOCCH3 and R′ and R″ may be the same or different, and wherein Z is either an electron releasing group or an electron withdrawing group with molecular weight less than 100, and the three Zs may be the same or different, and wherein said adhesive part and said activator part are combinable to form said adhesive composition, thus resulting in said adhesive composition which exhibits a long working time.
- 37. A composition according to claim 36, wherein said adhesive composition has a working time of approximately 40 minutes or longer at a temperature of 95° C.
- 38. The adhesive composition of claim 36, wherein said adhesive part further comprises, as may be advantageous, toughening agents, impact modifiers, carboxylic acids, retarders and/or chain transfer agents, and wherein said activator part further comprises, as may be advantageous, carriers, thickening agents and/or pigments, thus resulting in an adhesive composition which exhibits resistance to sliding, is non-sagging, does not boil while curing and, once cured, exhibits superior qualities of bonding strength, impact strength, tensile strength and elongation.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority as a continuation-in-part of application Ser. No. 09/568,079, filed May 10, 2000, the contents of which are incorporated herein by reference.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09568079 |
May 2000 |
US |
Child |
09851612 |
May 2001 |
US |