Non-aqueous sound-deadening composition containing a non-pulverulent polyacrylate binder and a radically polymerizable compound

Patent metadata

Field	Value
Publication number	US-9879150-B2
Application number	US-201515306946-A
Country	US
Kind code	B2
Filing date	Apr 17, 2015
Priority date	Apr 29, 2014
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A description is given of a nonaqueous sound deadener composition comprising (a) a nonpulverulent polyacrylate binder having a K value in the range from 10 to 35, measured as a 1% strength solution in tetrahydrofuran; (b) inorganic fillers; and a radically polymerizable compound which has at least one radically polymerizable C—C double bond and possesses a boiling point at atmospheric pressure of greater than 160° C. Also described is a method for damping oscillations or vibrations of components of vehicles and machines, using the sound deadener composition of the invention.

First claim

The invention claimed is:

1. A nonaqueous sound deadener composition, comprising:
(a) at least one nonpulverulent polyacrylate binder having a K value in the range from 10 to 35, measured as a 1% strength solution in tetrahydrofuran at 21° C.;
(b) at least one inorganic filler; and
(c) at least one radically polymerizable compound which has at least one radically polymerizable C—C double bond and possesses a boiling point at atmospheric pressure of greater than 160° C.;
wherein the compound (c) in the polymerized state has a glass transition temperature in the range from −30 to +60° C.

2. The sound deadener composition according to claim 1 , wherein the at least one radically polymerizable compound of component (c) has precisely one radically polymerizable C—C double bond to an extent of 50% to 100% by weight, and has two or more radically polymerizable C—C double bonds to an extent of 0% to 50% by weight.

3. The sound deadener composition according to claim 1 , wherein the at least one radically polymerizable compound of component (c) is at least one monomer selected from the group consisting of a (meth)acrylate monomer, a vinyl ether monomer, a (meth)acrylate oligomer, a vinyl ether oligomer, a monoalkylene glycol diacrylate, a dialkylene glycol diacrylate, a polyalkylene glycol diacrylate, and a urethane acrylate.

4. The sound deadener composition according to claim 1 , further comprising at least one thermally activatable initiator.

5. The sound deadener composition according to claim 1 , further comprising at least one film-forming assistant having a boiling point at atmospheric pressure of greater than 160° C., wherein
the at least one film-forming assistant is present in the sound deadener composition and is present in an amount of less than 10% by weight.

6. The sound deadener composition according to claim 5 , wherein the film-forming assistant is at least one member selected from the group consisting of a polyethylene glycol, an oligopropylene glycol ester, and an oligopropylene glycol ether.

7. The sound deadener composition according to claim 1 , further comprising at least one organic solvent having a boiling point at atmospheric pressure of less than 120° C., wherein
the at least one organic solvent is present in the sound deadener composition and is present in an amount of less than 10% by weight.

8. The sound deadener composition according to claim 1 , wherein the polyacrylate binder comprises:
at least 60% by weight of at least one C 1 to C 10 alkyl (meth)acrylate and,
optionally, at least one further monomer selected from the group consisting of an ethylenically unsaturated, radically polymerizable acid monomer; a vinyl ester of carboxylic acid comprising up to 20 C atoms; a vinylaromatic comprising up to 20 C atoms; an ethylenically unsaturated nitrile; a vinyl halide; a vinyl ether of an alcohol comprising 1 to 10 C atoms; an aliphatic hydrocarbon having 2 to 8 C atoms and one or two double bonds.

9. The sound deadener composition according to claim 1 , wherein the polyacrylate binder has a glass transition temperature in the range from −60 to ±80° C.

10. The sound deadener composition according to claim 1 , wherein the polyacrylate binder does not have a core-shell morphology.

11. The sound deadener composition according to claim 1 , wherein the polyacrylate binder at 130° C. has a zero-shear viscosity of not more than 40 Pa s.

12. The sound deadener composition according to claim 1 , wherein the polyacrylate binder comprises, in polymerized form:
(a1) at least 80% by weight of at least one C1 to C10 alkyl (meth)acrylate; and
(a2) from 0.5% to 20% by weight from at least one monomer having at least one polar group, the polar group being selected from the group consisting of a carboxylic acid group, a carboxamide group, a pyrrolidone group, a urethane group, a urea group, an anhydride group, a sulfate group, a sulfonate group, a phosphate group, and a phosphonate group.

13. The sound deadener composition according to claim 1 , wherein the polyacrylate binder comprises, in polymerized form, methyl (meth)acrylate, at least one C2 to C4 alkyl acrylate, and (meth)acrylic acid, and also, optionally, at least one of allyl methacrylate, dihydrocyclopentadienyl acrylate, and styrene.

14. The sound deadener composition according to claim 1 , wherein the polyacrylate binder comprises, in polymerized form:
(i) 0% to 99% by weight of methyl (meth)acrylate,
(ii) 0% to 99% by weight of at least one C2 to C10 alkyl acrylate,
(iii) 0.5% to 15% by weight of (meth)acrylic acid,
(iv) 0% to 25% by weight of a polyethylenically unsaturated alkyl acrylate, and
(v) 0% to 30% by weight of styrene.

15. The sound deadener composition according to claim 1 , comprising:
(a) 5% to 35% by weight of the at least one nonpulverulent polyacrylate binder,
(b) 40% to 90% by weight of at least one inorganic filler,
(c) 1% to 35% by weight of the at least one radically polymerizable compound,
(d) 0.01% to 10% by weight of initiator,
(e) from 0% to 20% by weight of solvent with boiling point greater than 160° C., and
(f) 0% to 50% by weight of at least one further auxiliary.

16. The sound deadener composition according to claim 15 , wherein the at least one inorganic filler is at least one member selected from the group consisting of kaolin, chalk, barium sulfate, carbon black, graphite, talc, a clay mineral, microdolomite, finely ground quartz, and mica, and
the at least one further auxiliary is present in an amount
of at least 0.1% by weight and comprises at least one member selected from the group consisting a crosslinker, a thickener, a rheological additive, a resin, a plasticizer, a defoamer, a preservative, an antifreeze agent, and a pigment dispersant.

17. The sound deadener composition according to claim 1 , wherein the sound deadener composition is free from organic solvents having a boiling point of less than 120° C. at atmospheric pressure.

18. A method for damping oscillations or vibrations of components of a vehicle or of a machine, the method comprising:
applying a nonaqueous sound deadener composition to a component of a vehicle or of a machine, and, optionally,
drying and/or crosslinking the sound deadener composition;
wherein the nonaqueous sound deadener composition, comprises:
(a) at least one nonpulverulent polyacrylate binder having a K value in the range from 10 to 35, measured as a 1% strength solution in tetrahydrofuran at 21° C.;
(b) at least one inorganic filler; and
(c) at least one radically polymerizable compound which has at least one radically polymerizable C—C double bond and possesses a boiling point at atmospheric pressure of greater than 160° C.

19. A substrate, comprising a sound deadener composition according to claim 1 , wherein
the substrate is at least partly coated with the sound deadener composition.

20. A nonaqueous sound deadener composition, comprising:
(a) at least one nonpulverulent polyacrylate binder having a K value in the range from 10 to 35, measured as a 1% strength solution in tetrahydrofuran at 21° C.;
(b) at least one inorganic filler; and
(c) at least one radically polymerizable compound which has at least one radically polymerizable C—C double bond and possesses a boiling point at atmospheric pressure of greater than 160° C.;
wherein the polyacrylate binder has a glass transition temperature in the range from −60 to ÷80° C.

21. The sound deadener composition according to claim 20 , wherein the at least one

Assignees

• Basf Se

Inventors

• Wulff Dirk
• Licht Ulrike
• Preishuber-Pfluegl Peter

Classifications

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08L2201/56

  Non-aqueous solutions or dispersions · CPC title

• G10K11/162

  Selection of materials · CPC title

• C09D133/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C09D4/06 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 C09D159/00 - C09D187/00 · CPC title