Adhesive compositions comprising maleic acid peroxy compounds as adhesive promoters
First Claim
1. A curable adhesive composition comprising (i) a crosslinkable component containing ethylenic unsaturation and (ii) from about 0.1 to about 10 percent by weight, based on the combined weight of (i) and (ii) of an initiator of the formula:
- ##STR4## wherein R1 is H or lower alkyl and R2 is H or --OR3, where R3 is H or lower alkyl.
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Abstract
An adhesive composition comprising a component which is polymerizable or cross-linkable with a peroxy initator, e.g., a (meth)acrylic ester monomer, thiolene resin, or tough acrylic copolymer, and an initiator of the formula: ##STR1## wherein: R1 is H or lower alkyl; and R2 is H or --OR3, where R3 is H or lower alkyl.
An appertaining method of bonding substrates, and bonded articles formed thereby, are also disclosed. The adhesive composition of the invention is particularly advantageous in bonding of metal substrates, on which the maleic acid peroxy compounds of the invention produce surface bonding enhancement of the adhesive composition, relative to the use of conventional polymerization/crosslinking peroxy initiators such as t-butyl perbenzoate.
28 Citations
19 Claims
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1. A curable adhesive composition comprising (i) a crosslinkable component containing ethylenic unsaturation and (ii) from about 0.1 to about 10 percent by weight, based on the combined weight of (i) and (ii) of an initiator of the formula:
- ##STR4## wherein R1 is H or lower alkyl and R2 is H or --OR3, where R3 is H or lower alkyl.
- View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 19)
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2. An adhesive composition comprising an anaerobically curable ethylenically unsaturated monomer, and a polymerization initiator for said monomer, of the formula:
- ##STR5## wherein;
R1 is H or lower alkyl; and
R2 is H or --OR3, where R3 is H or lower alkyl.
- ##STR5## wherein;
- 12. An improved adhesive composition comprising (i) a curable component containing ethylenic unsaturation and (ii) an effective amount of an initiator therefor wherein the improvement comprises employing as the initiator (ii) a compound of the formula ##STR6## wherein R1 is H or lower alkyl and R2 is H or --OR3, wherein R3 is H or lower alkyl for enhanced adhesion of the cured adhesive composition to metal substrates.
Specification