Adhesive compositions free of metallic catalyst
AssigneeHenkel Corporation
InventorsShabbir Attarwala, Qinyan Zhu, Susan Lamtruong Levandoski
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Abstract
The present invention generally relates to anaerobically curable compositions of: (a) a cyanate ester compound having the structure of formula I: R1O—C≡N)m (I) wherein m is from 2 to 5 and R1 is an aromatic nucleus-containing residue; (b) a (meth)acrylate monomer; and (c) an anaerobic cure inducing composition comprising peroxide and saccharin, wherein said composition is free of added metallic catalyst.
Claims15
An anaerobically curable composition comprising:
- (a) a cyanate ester compound having the structure of formula I:
- R1O—C≡N)m (I)
- wherein m is from 2 to 5 and R1 is an aromatic nucleus-containing residue;
- (b) a (meth)acrylate monomer;
- and
- (c) an anaerobic cure inducing composition comprising peroxide and saccharin, wherein said composition is free of added metallic catalyst.
An anaerobically cured composition comprising the reaction product of
- (a) a cyanate ester compound having the formula:
- R1O—C≡N)m (I)
- wherein m is from 2 to 5 and R1 is an aromatic nucleus-containing residue;
- (b) a (meth)acrylate monomer;
- (c) an anaerobic cure inducing composition comprising peroxide and saccharin;
- and
- (d) an active metallic surface, wherein said composition was free of added metallic catalyst.
A method for bonding metallic surfaces comprising:
- (a) providing activated metallic mating surfaces;
- (b) applying to at least one of said mating surfaces an anaerobically curable composition comprising a cyanate ester compound having the formula:
- R1O—C≡N)m (I)
- wherein m is from 2 to 5 and R1 is an aromatic nucleus-containing residue and an anaerobic cure inducing composition comprising peroxide and saccharin, wherein said composition is free of added metallic catalyst;
- and
- (c) mating said surfaces and allowing said anaerobically curable composition to cure therebetween.
An article of manufacture comprising:
- substrates, at least one of which having active metallic surfaces and an anaerobically curable composition therebetween to adhesively join the substrates to one and the other, wherein the anaerobically curable composition comprises a cyanate ester compound and an anaerobic cure inducing composition comprising peroxide and saccharin, and said composition is free of added metallic catalyst.
A cured composition formed by the process of:
- (a) providing a substrate having an active metallic surface;
- (b) applying an anaerobically curable composition thereto wherein the anaerobically curable composition comprises a cyanate ester compound and an anaerobic cure inducing composition comprising peroxide and saccharin, wherein said composition is free of added metallic catalyst;
- and
- (c) subjecting said composition to anaerobic conditions suitable to effectuate cure.
A method for producing threadlocking matable parts said method comprising the steps of:
- (a) applying an anaerobically composition comprising a cyanate ester compound and an anaerobic cure inducing composition comprising peroxide and saccharin, free of added metallic catalyst to at least a portion of an engagement surface of a matable part which is matably engageable with a complimentary engagement structure;
- (b) mating said complimentary engagement structures;
- and
- (c) subjecting said composition to anaerobic conditions suitable to effectuate cure at room temperature, thereby forming threadlocked matable parts.
Dependencies are inferred from the claim text.