Cyanoacrylate compositions

Patent metadata

Field	Value
Publication number	US-11725119-B2
Application number	US-202016987648-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Feb 12, 2018
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

This invention relates to cyanoacrylate-containing compositions that include, in addition to the cyanoacrylate component, a polybutylmethacrylate-polymethylmethacrylate copolymer. The inventive cyanoacrylate compositions load up to nearly a threefold increase of polybutylmethacrylate-polymethylmethacrylate copolymer over conventional polymethylmethacrylate and cured products of the inventive cyanoacrylate compositions demonstrate improved flexibility in terms of modulus (at comparable loading levels as well as increased loading levels compared to conventional polymethylmethacrylate) without compromising stability, fixture time or tensile shear strength.

First claim

What is claimed is:

1. A cyanoacrylate composition comprising
(a) a cyanoacrylate component, and
(b) a polybutylmethacrylate-polymethylmethacrylate copolymer having a molecular weight below 80,000 Mn, and
(c) a rubber toughening component,

wherein the rubber toughening component is selected from the group consisting of (a) reaction products of the combination of ethylene, methyl acrylate and monomers reactive with carboxylic acids, (b) dipolymers of ethylene and methyl acrylate, (c) vinylidene chloride-acrylonitrile copolymers, (d) vinyl chloride/vinyl acetate copolymer, (e) copolymers of ethylene and vinyl acetate, and combinations thereof.

2. A cyanoacrylate composition comprising
(a) a cyanoacrylate component, and
(b) a polybutylmethacrylate-polymethylmethacrylate copolymer having a molecular weight below 80,000 Mn, and
(c) a rubber toughening component,

wherein the rubber toughening component is a reaction product of the combination of ethylene, methyl acrylate and monomers reactive with carboxylic acids, wherein the reaction product is free of release agents, anti-oxidants, stearic acid and polyethylene glycol ether wax.

3. The composition according to claim 1 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer has a molecular weight of about 60,000 Mn.

4. The composition according to claim 2 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer has a molecular weight of about 60,000 Mn.

5. The composition according to claim 1 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount up to about 50 percent by weight of the total composition.

6. The composition according to claim 2 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount up to about 50 percent by weight of the total composition.

7. The composition according to claim 1 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount in the range of about 2 percent by weight to about 45 percent by weight of the total composition.

8. The composition according to claim 2 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount in the range of about 2 percent by weight to about 45 percent by weight of the total composition.

9. The composition according to claim 1 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount of about 20 percent by weight of the total composition.

10. The composition according to claim 2 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount of about 20 percent by weight of the total composition.

11. The composition according to claim 1 , wherein the composition is flowable at room temperature.

12. The composition according to claim 2 , wherein the composition is flowable at room temperature.

13. The composition according to claim 1 , wherein the composition has a viscosity up to about 175,000 mPa·s.

14. The composition according to claim 2 , wherein the composition has a viscosity up to about 175,000 mPa·s.

15. The composition according to claim 1 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount up to about 50 percent by weight of the total composition and a viscosity up to about 175,000 mPa·s.

16. The composition according to claim 2 , wherein the polybutylmethacrylate-polymethylmethacrylate copolymer is present in an amount up to about 50 percent by weight of the total composition and a viscosity up to about 175,000 mPa·s.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Kelly Ruth A
• Byrne Laura M

Classifications

• C09J4/06 Primary

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00 · CPC title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• C08F220/1804

  C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate · CPC title

• C08K3/36

  Silica · CPC title

• C08K5/315

  Compounds containing carbon-to-nitrogen triple bonds · CPC title