Coating material and its use for producing filler coats and stone impact protection primers

• US 6,727,316 B1
• Filed: 12/13/2001
• Issued: 04/27/2004
• Est. Priority Date: 06/30/1999
• Status: Expired due to Fees

• Current Assignee: BASF Coatings AG (BASF SE)
• Original Assignee: BASF Coatings AG (BASF SE)
• Inventors: Bremser, Wolfgang
• Primary Examiner(s): Wu, David W.
• Assistant Examiner(s): Sastri, Satya B
• Application Number:
  US10/018,703
• Time in Patent Office: 866 Days
• Field of Search: 525/333.3, 525/105, 525/193, 524/457, 524/458, 524/475, 524/413, 524/451, 524/570, 524/577
• US Class Current: 524/510
• CPC Class Codes: B05D 7/546 each layer being cured, at least partially, separately
• CPC Class Codes: B05D 7/577 some layers being coated "wet-on-wet", the others not
• CPC Class Codes: C08F 212/08 Styrene
• CPC Class Codes: C08F 212/32 containing two or more rings
• CPC Class Codes: C08F 220/06 Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
• CPC Class Codes: C08F 220/14 Methyl esters , e.g. methyl (meth)acrylate
• CPC Class Codes: C08F 220/1804 C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
• CPC Class Codes: C08F 220/1808 C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
• CPC Class Codes: C08F 220/281 and containing only one oxygen, e.g. furfuryl (meth)acrylate or 2-methoxyethyl (meth)acrylate
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 151/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C09D151/04, C09D151/06 take precedence
• CPC Class Codes: C09D 153/00 Coating compositions based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers

Abstract

The use of a copolymer (A) preparable by free-radical polymerization of

a) at least one olefinically unsaturated monomer and

b) at least one olefinically unsaturated monomer different than the olefinically unsaturated monomer (a) and of the general formula I

R¹R²C═CR³R⁴  (I),

in which the radicals R¹, R², R³ and R⁴ each independently of one another are hydrogen atoms or substituted or unsubstituted alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, alkylaryl, cycloalkylaryl, arylalkyl or arylcycloalkyl radicals, with the proviso that at least two of the variables R¹, R², R³ and R⁴ are substituted or unsubstituted aryl, arylalkyl or arylcycloalkyl radicals, especially substituted or unsubstituted aryl radicals;

in an aqueous medium, in a coating material used to produce surfacer coats and antistonechip primer coats.

Claims

1. A coating composition for use as a surfacer coatings and antistonechip primer coating, comprising

A) a binder comprising at least one copolymer made by free-radical polymerization of

a) at least one olefinically unsaturated monomer and

b) at least one olefinically unsaturated monomer different than the olefinically unsaturated monomer (a) and of the general formula I

2. The coating composition of claim 1, wherein the copolymer is obtained by

(i) subjecting at least one monomer (a) and at least one monomer (b) to free-radical polymerization in an aqueous medium to provide a reaction product, and then

(ii) reacting the reaction product with at least one further monomer (a) under free-radical conditions.

3. The coating composition of claim 1, wherein at least one of the aryl radicals R¹, R², R³ or R⁴ of the compound (b) comprise phenyl or naphthyl radicals.

4. The coating composition of claim 3, wherein the substituents in one or more of the radicals R¹, R², R³ or R⁴ of the compound (b) are electron-donating or electron-withdrawing atoms or organic radicals.

5. The coating composition of claim 1, wherein monomers (a) comprise at least one of

a1) (meth)acrylic esters which are essentially free from acid groups;

a2) monomers which carry per molecule at least one hydroxyl group, amino group, alkoxymethylamino group or imino group and are essentially free from acid groups;

a3) monomers which carry per molecule at least one acid group which can be converted to the corresponding acid anion group;

a4) vinyl esters of alpha-branched monocarboxylic acids having 5 to 18 carbon atoms in the molecule;

a5) reaction products of acrylic acid and/or methacrylic acid with the glycidyl ester of an alpha-branched monocarboxylic acid having 5 to 18 carbon atoms per molecule;

a6) cyclic and/or acyclic olefins;

a7) (meth)acrylamides;

a8) monomers containing epoxide groups;

a9) vinylaromatic hydrocarbons;

a10) nitriles;

a11) vinyl compounds;

a12) allyl compounds;

a13) polysiloxane macromonomers having a number-average molecular weight Mn of from 1000 to 40,000 and having on average from 0.5 to 2.5 ethylenically unsaturated double bonds per molecule;

a14) acryloxysilane-containing vinyl monomers, preparable by reacting hydroxyl-functional silanes with epichlorohydrin and then reacting the reaction product with (meth)acrylic acid and/or hydroxyalkyl and/or hydroxycycloalkyl esters of (meth)acrylic acid (monomers a2) and

mixtures thereof.

6. The coating composition of claim 1 further comprising at least one of the following constituents:

A) at least one polymer different than the copolymer (A) and containing at least one functional group (afg) which is able to undergo themal crosslinking reactions with complementary functional groups (cfg) in the crosslinking agent (C);

C) at least one crosslinking agent containing at least two functional groups (cfg) which a re able to undergo thermal crosslinking reactions with complementary functional groups (afg) in the constituent (A),

D) at least one constituent which is crosslinkable with actinic radiation,

E) at least one photoinitiator,

F) at least one thermal crosslinking initiator,

G) at least one reactive diluent curable thermally and/or with actinic radiation,

H) at least one coatings additive,

I) at least one organic solvent, and

mixtures thereof.

7. A method of coating a substrate, comprising

applying the coating composition of claim 1 to a substrate, and

curing the applied coating composition to provide a coated substrate.

8. A coated article, comprising the coated substrate of claim 7.

9. The coating composition of claim 3, wherein at least one of the aryl radicals R¹, R², R³ or R⁴ of the compound (b) comprise phenyl radicals.

10. The coating composition of claim 3, wherein the substituents in one or more of the radicals R¹, R², R³ or R⁴ of the compound (b) are selected from the group consisting of halogen atoms, nitrile, nitro, partially or fully halogenated alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, alkylaryl, cycloalkylaryl, arylalkyl and arylcycloalkyl radicals;

aryloxy, alkyloxy and cycloalkyloxy radicals;

arylthio, alkylthio and cycloalkylthio radicals;

hydroxyl groups, primary, secondary and/or tertiary amino groups, and mixtures thereof.