Self-emulsifying anaerobic composition

• US 4,069,378 A
• Filed: 06/17/1976
• Issued: 01/17/1978
• Est. Priority Date: 06/17/1976
• Status: Expired due to Term

• Current Assignee: Loctite Corporation (Henkel AG & Co KGaA)
• Original Assignee: Loctite Corporation (Henkel AG & Co KGaA)
• Inventors: DeMarco, JoAnn
• Primary Examiner(s): Wong, Jr., Harry
• Application Number:
  US05/697,165
• Time in Patent Office: 579 Days
• Field of Search: 526/328
• US Class Current: 526/209
• CPC Class Codes: C08F 220/00 Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
• CPC Class Codes: C09J 4/00 Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
• CPC Class Codes: Y10T 428/31699 Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

A self-emulsifying anaerobic-curing composition is disclosed. The composition is rendered self-emulsifying by incorporating certain anionic and/or nonionic surfactants in a concentration range of about 0.25 to about 10.0 percent. The preferred anionics comprise the petroleum sulfonates and the sodium alkyl or alkylaryl sulfonates. The preferred nonionics comprise the ethoxylated alkyl alcohols, the ethoxylated alkyl phenols, and the polyoxyethylene/polyoxypropylene glycols. Any anaerobic monomer or monomer mixture in which the surfactant is soluble and compatible with the cure system may be used.

These self-emulsifiable compositions have the advantage of being readily removed from surfaces by washing with water, which makes them especially useful in impregnation processes where uncured resin must be removed from areas which are difficult to wash, such as small, blind holes.

Claims

1. An anaerobic curing composition which is self-emulsifiable upon mixing with water comprising:

a. an anaerobically curing acrylate monomer;

b. a peroxy initiator in sufficient concentration to initiate cure of the monomer upon exclusion of oxygen; and

c. about 0.25 to about 10.0 percent by weight of the total composition of an anionic or nonionic surfactant which is dissolved in the composition and which renders the composition self-emulsifying upon mixing with water.

2. A composition of claim 1 wherein the concentration of the surfactant is about 0.5 to 5.0 percent by weight of the total composition.

3. A composition of claim 1 wherein the concentration of the surfactant is about 1.0 to 2.5 percent by weight of the total composition.

4. A composition of claim 1 wherein the surfactant is anionic.

5. A composition of claim 1 wherein the surfactant is nonionic.

6. A composition of claim 1 wherein the surfactant is a mixture of anionic and nonionic surfactants.

7. A composition of claim 4 wherein the surfactant is a petroleum sulfonate.

8. A composition of claim 4 wherein the surfactant is an alkali alkyl sulfonate or alkylaryl sulfonate.

9. A composition of claim 5 wherein the surfactant is an ethoxylated linear or branched primary or secondary alcohol.

10. A composition of claim 5 wherein the surfactant is an ethoxylated linear or branched alkyl phenol.

11. A composition of claim 5 wherein the surfactant is a polyoxyethylene/polyoxypropylene glycol.

12. A composition of claim 1 wherein at least a portion of the polymerizable anaerobic sealant has the formula ##STR8## wherein R⁴ represents a radical selected from the group consisting of hydrogen, lower alkyl of from 1 to about 4 carbon atoms, hydroxy alkyl of from 1 to about 4 carbon atoms, and ##STR9## R³ is a radical selected from the group consisting of hydrogen, halogen and lower alkyl of from 1 to about 4 carbon atoms;

R⁵ is a radical selected from the group consisting of hydrogen, hydroxyl and ##STR10## m is 0 to about 12, n is at least 1, and p is 0 or 1.

13. A composition of claim 1 containing in addition an accelerator of anaerobic polymerization.

14. A composition of claim 13 wherein the accelerator is a sulfimide.