US5276097A — Coating agent based on polymers containing carbox…

Claim 1

Independent Claim 191 words

A coating agent comprising: A) a polymer selected from the group consisting of a copolymer containing carboxyl groups, a polyester containing carboxyl groups and mixtures thereof, said polymer having a number-average molecular weight M n of 500 to 8,000 and an acid number of 15 to 200 mg of KOH/g as the essential binder component; and B) at least one compound containing epoxide groups as crosslinking agents; wherein the compound B containing epoxide groups is a copolymer containing epoxide groups, has a number-average molecular weight M n of 300 to 5,000 and a heterogeneity (M w /M n ), measured by gel permeation chromatography, of ≦3 and has been prepared by continuous bulk polymerization at temperatures between 130° and 350° C. and pressures above 1 bar of a) 10 to 60% by weight of at least one vinylaromatic hydrocarbon; b) 10 to 50% by weight of at least one ethylenically unsaturated monomer containing at least one epoxide group per molecule; and c) 5 to 80% by weight of other ethylenically unsaturated copolymerizable monomers; the sum of the weight contents of components (a) to (c) in each case being 100% by weight.

Claim 2

Dependent Claim 191 words

A coating agent comprising: A) a polymer selected from the group consisting of a copolymer containing carboxyl groups, a polyester containing carboxyl groups and mixtures thereof, said polymer having a number-average molecular weight M n of 500 to 8,000 and an acid number of 15 to 200 mg of KOH/g as the essential binder component; and B) at least one compound containing epoxide groups as crosslinking agents; wherein the compound B containing epoxide groups is a copolymer containing epoxide groups, has a number-average molecular weight M n of 300 to 5,000 and a heterogeneity (M w /M n ), measured by gel permeation chromatography, of ≦3 and has been prepared by continuous bulk polymerization at temperatures between 130° and 350° C. and pressures above 1 bar of a) 10 to 60% by weight of at least one vinylaromatic hydrocarbon; b) 10 to 50% by weight of at least one ethylenically unsaturated monomer containing at least one epoxide group per molecule; and c) 5 to 80% by weight of other ethylenically unsaturated copolymerizable monomers; the sum of the weight contents of components (a) to (c) in each case being 100% by weight.

Claim 3

Dependent Claim 219 words

A process for the preparation of a coating agent comprising: A) a polymer selected from the group consisting of a copolymer containing carboxyl groups, a polyester containing carboxyl groups and mixtures thereof, said polymer having a number-average molecular weight M n of 500 to 8,000 and an acid number of 15 to 200 mg of KOH/g as the essential binder component and B) one or more compounds containing epoxide groups as the crosslinking agent, which comprises: mixing the binder component A and the crosslinking agent B only shortly before application of the coating agent, wherein the compound B containing epoxide groups is a copolymer which contains epoxide groups, has a number-average molecular weight M n of 300 to 5,000, and a heterogeneity (M w /M n ), measured by gel permeation chromatography, of ≦3, and has been prepared by continuous bulk polymerization at temperatures between 130° and 350° C. and pressures above 1 bar of a) 10 to 60% by weight of one or more vinylaromatic hydrocarbons, b) 10 to 50% by weight of one or more ethylenically unsaturated monomers containing at least one epoxide group per molecule and c) 5 to 80% by weight of other ethylenically unsaturaged copolymerizable monomers, the sum of the weight contents of components (a) to (c) in each case being 100% by weight.

Claim 4

Dependent Claim 219 words

A process for the preparation of a coating agent comprising: A) a polymer selected from the group consisting of a copolymer containing carboxyl groups, a polyester containing carboxyl groups and mixtures thereof, said polymer having a number-average molecular weight M n of 500 to 8,000 and an acid number of 15 to 200 mg of KOH/g as the essential binder component and B) one or more compounds containing epoxide groups as the crosslinking agent, which comprises: mixing the binder component A and the crosslinking agent B only shortly before application of the coating agent, wherein the compound B containing epoxide groups is a copolymer which contains epoxide groups, has a number-average molecular weight M n of 300 to 5,000, and a heterogeneity (M w /M n ), measured by gel permeation chromatography, of ≦3, and has been prepared by continuous bulk polymerization at temperatures between 130° and 350° C. and pressures above 1 bar of a) 10 to 60% by weight of one or more vinylaromatic hydrocarbons, b) 10 to 50% by weight of one or more ethylenically unsaturated monomers containing at least one epoxide group per molecule and c) 5 to 80% by weight of other ethylenically unsaturaged copolymerizable monomers, the sum of the weight contents of components (a) to (c) in each case being 100% by weight.

Claim 5

Dependent Claim 23 words

A coating agent as claimed in claim 1, wherein the compound B has a number-average molecular weight M n of 500 to 3,500.

Claim 6

Dependent Claim 27 words

A coating agent as claimed in claim 1, wherein the compound B has a heterogeneity (M w /M n ), measured by gel permeation chromatographly, of ≦2.

Claim 7

Dependent Claim 86 words

A coating agent as claimed in claim 1, wherein the copolymer B containing epoxide groups has been prepared by bulk polymerization of a) 15 to 50% by weight, of one or more vinylaromatic hydrocarbons, b) 15 to 50% by weight of one or more ethylenically unsaturated monomers containing at least one epoxide group per molecule and c) 20 to 50% by weight, of other ethylenically unsaturated copolymerizable monomers, the sum of the weight contents of components (a) to (c) in each case being 100% by weight.

Claim 8

Dependent Claim 28 words

A coating agent as claimed in claim 1, wherein the copolymer B containing epoxide groups has been prepared using glycidyl methacrylate as one of the ethylenically unsaturated monomers.

Claim 9

Dependent Claim 41 words

A coating agent as claimed in claim 1, wherein the copolymer B containing epoxide groups has been prepared using alkyl esters selected from the group consisting of acrylic acid, methacrylic acid or mixtures thereof as one of the ethylenically unsaturated monomers.

Claim 10

Dependent Claim 24 words

A coating agent as claimed in claim 1, wherein the copolymer B containing epoxide groups has an epoxide equivalent weight of 150 to 2,000.

Claim 11

Dependent Claim 24 words

A coating agent as claimed in claim 8, wherein the copolymer B containing epoxide groups has an epoxide equivalent weight of 500 to 1,000.

Claim 12

Dependent Claim 33 words

A coating agent as claimed in claim 1, wherein the polymers which contain carboxyl groups and are employed as the binders A have an acid number of 30 to 120 mg of KOH/g.

Claim 13

Dependent Claim 33 words

A coating agent as claimed in claim 1, wherein the polymers which contain carboxyl groups and are employed as the binders A have an amine number of 0 to 50 mg of KOH/g.

Claim 14

Dependent Claim 33 words

A coating agent as claimed in claim 1, wherein the polymers which contain carboxyl groups and are employed as the binders A have an amine number of 10 to 40 mg of KOH/g.

Claim 15

Dependent Claim 68 words

A coating agent as claimed in claim 1, wherein the polymers which contain carboxyl groups and are employed as the binders A have been prepared by a procedure in which a polymer containing hydroxyl groups and having an OH number of 30 to 200 mg of KOH/g has first been prepared and has then been reacted with carboxylic acid anhydrides to give the corresponding polymers containing carboxyl groups.

Claim 16

Dependent Claim 42 words

A coating agent as claimed in claim 1, wherein the polymers which contain carboxyl groups and are employed as the binders A have likewise been prepared by continuous bulk polymerization at temperatures between 130° and 350° C. and pressures above 1 bar.

Claim 17

Dependent Claim 30 words

A coating agent as claimed in claim 1, wherein the polymers which contain carboxyl groups and are employed as the binders A are copolymers prepared by free radical solution polymerization.

Claim 18

Dependent Claim 118 words

A coating agent as claimed in claim 1, wherein the coating agent contains: A) 10 to 70% by weight, based on the total weight of the coating agent, of binder A containing carboxyl groups; B) 10 to 50% by weight, based on the total weight of the coating agent, of crosslinking agent B containing epoxide groups; C) 20 to 50% by weight, based on the total weight of the coating agent, of one or more organic solvents; and D) 0 to 60% by weight, based on the total weight of the coating agent, of pigments and fillers; and E) 0 to 10% by weight, based on the total weight of the coating agent, of customary auxiliaries and additives.

Claim 19

Dependent Claim 17 words

A process for automobile repair refinishing, wherein a coating agent as claimed in claim 1 is applied.

Claim 20

Dependent Claim 17 words

A process for automobile series painting, where a coating agent as claimed in claim 17 is applied.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-01-03	1997-07-05	1998-01-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-01-03	2001-07-05	2002-01-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-01-03	2005-07-05	2006-01-04	$7700.00	Window Closed / Lapsed

Coating agent based on polymers containing carboxyl groups and crosslinking agents containing epoxide groups, processes for the preparation of the coating agent and its use

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag