US4489135A — Water-dilutable coating agent for preparing the b…

Claim 1

Independent Claim 199 words

A process for preparing a multilayer coating, in which a substrate is coated with a base layer of a waterdilutable coating agent which contains pigments and a top coat of a transparent coating agent is applied thereto after an air drying period and the coated substrate is then heated, wherein the coating agent for the base layer contains as a binder an aqueous polyurethane dispersion which has been prepared by reacting (A) a linear polyether diol and/or polyester diol having terminal hydroxyl groups and a molecular weight of 400 to 3,000 with (B) a diisocyanate to form a first intermediate product in such a molar ratio that said first intermediate product has terminal isocyanate groups, (C) and reacting said first intermediate product with a compound which has two groups which are reactive toward isocyanate groups and at least one group which is capable of forming an anion, said compound neutralized with a tertiary amine before the reaction and forming a second intermediate product, converting said second intermediate product, obtained from (A), (B) and (C), into a predominantly aqueous phase; and (D) reacting isocyanate groups which are still present with a diamine and/or polyamine having primary and/or secondary amine groups.

Claim 2

Dependent Claim 199 words

A process for preparing a multilayer coating, in which a substrate is coated with a base layer of a waterdilutable coating agent which contains pigments and a top coat of a transparent coating agent is applied thereto after an air drying period and the coated substrate is then heated, wherein the coating agent for the base layer contains as a binder an aqueous polyurethane dispersion which has been prepared by reacting (A) a linear polyether diol and/or polyester diol having terminal hydroxyl groups and a molecular weight of 400 to 3,000 with (B) a diisocyanate to form a first intermediate product in such a molar ratio that said first intermediate product has terminal isocyanate groups, (C) and reacting said first intermediate product with a compound which has two groups which are reactive toward isocyanate groups and at least one group which is capable of forming an anion, said compound neutralized with a tertiary amine before the reaction and forming a second intermediate product, converting said second intermediate product, obtained from (A), (B) and (C), into a predominantly aqueous phase; and (D) reacting isocyanate groups which are still present with a diamine and/or polyamine having primary and/or secondary amine groups.

Claim 3

Dependent Claim 193 words

A process for preparing a multilayer coating, which comprises coating a substrate with a base layer of a waterdilutable coating agent which contains pigments and which contains as a binder an aqueous polyurethane dispersion which has been prepared by reacting (A) a linear polyether diol and/or polyester diol having terminal hydroxyl groups and a molecular weight of 400 to 3,000 with (B) a diisocyanate to form a first intermediate product in such a molar ratio that said intermediate product has terminal isocyanate groups; (C) and reacting said first intermediate product with a compound which has two groups which are reactive toward isocyanate groups and at least one group which is capable of forming an anion, said compound neutralized with a tertiary amine before the reaction and forming a second intermediate product, converting said second intermediate product, obtained from (A), (B) and (C), into a predominantly aqueous phase; and (D) reacting isocyanate groups which are still present with a diamine and/or polyamine having primary and/or secondary amine groups, applying a top coat of a transparent coating agent after an air drying period and then heating the coated substrate and conjointly hardening the coating layers.

Claim 4

Dependent Claim 193 words

A process for preparing a multilayer coating, which comprises coating a substrate with a base layer of a waterdilutable coating agent which contains pigments and which contains as a binder an aqueous polyurethane dispersion which has been prepared by reacting (A) a linear polyether diol and/or polyester diol having terminal hydroxyl groups and a molecular weight of 400 to 3,000 with (B) a diisocyanate to form a first intermediate product in such a molar ratio that said intermediate product has terminal isocyanate groups; (C) and reacting said first intermediate product with a compound which has two groups which are reactive toward isocyanate groups and at least one group which is capable of forming an anion, said compound neutralized with a tertiary amine before the reaction and forming a second intermediate product, converting said second intermediate product, obtained from (A), (B) and (C), into a predominantly aqueous phase; and (D) reacting isocyanate groups which are still present with a diamine and/or polyamine having primary and/or secondary amine groups, applying a top coat of a transparent coating agent after an air drying period and then heating the coated substrate and conjointly hardening the coating layers.

Claim 5

Dependent Claim 196 words

A substrate coated with a multilayer coating which has been obtained by applying a water-dilutable coating agent which contained pigments and by applying a transparent coating agent as a top coat and subsequently heating the coated substrate, in which the coating agent for the base layer contained as binder an aqueous polyurethane dispersion having a polyurethane resin acid number of 5 to 70 and having been prepared by reacting (A) a linear polyether diol and/or polyester diol having terminal hydroxyl groups and a molecular weight of 400 to 3,000 with (B) a diisocyanate to form a first intermediate product in such a molar ratio that said first intermediate product has terminal isocyanate groups; (C) and reacting the intermediate product with a compound which has two groups which are reactive toward isocyanate groups and at least one group which is capable of forming an anion, said compound neutralized with a tertiary amine before the reaction and forming a second intermediate product, converting said second intermediate product, obtained from (A), (B) and (C), into a predominantly aqueous phase; and (D) reacting isocyanate groups which are still present with a diamine and/or polyamine having primary and/or secondary amino groups.

Claim 6

Dependent Claim 196 words

A substrate coated with a multilayer coating which has been obtained by applying a water-dilutable coating agent which contained pigments and by applying a transparent coating agent as a top coat and subsequently heating the coated substrate, in which the coating agent for the base layer contained as binder an aqueous polyurethane dispersion having a polyurethane resin acid number of 5 to 70 and having been prepared by reacting (A) a linear polyether diol and/or polyester diol having terminal hydroxyl groups and a molecular weight of 400 to 3,000 with (B) a diisocyanate to form a first intermediate product in such a molar ratio that said first intermediate product has terminal isocyanate groups; (C) and reacting the intermediate product with a compound which has two groups which are reactive toward isocyanate groups and at least one group which is capable of forming an anion, said compound neutralized with a tertiary amine before the reaction and forming a second intermediate product, converting said second intermediate product, obtained from (A), (B) and (C), into a predominantly aqueous phase; and (D) reacting isocyanate groups which are still present with a diamine and/or polyamine having primary and/or secondary amino groups.

Claim 7

Dependent Claim 44 words

The process as claimed in claim 2, wherein the polyurethane dispersion is prepared by replacing some of component (C) by a compound (E) which has two groups which are reactive toward isocyanate groups but which is free of groups capable of forming an anion.

Claim 8

Dependent Claim 43 words

The process as claimed in claim 4, wherein the coating agent for the base layer contains as an additional binder component a water-dilutable melamine resin in an amount of 1 to 80% by weight, relative to the solids content of the polyurethane dispersion.

Claim 9

Dependent Claim 27 words

The process as claimed in claim 5, wherein the melamine resin content, relative to the solids content of the polyurethane dispersion, is 20 to 60% by weight.

Claim 10

Dependent Claim 72 words

The process as claimed in claim 6, wherein the coating agent for the base layer contains as a further binder component a water-dilutable polyester resin and/or a water-dilutable polyacrylate resin, where the weight ratio of melamine resin to polyester and/or polyacrylate resin is 2:1 to 1:4 and the total melamine resin and polyester and polyacrylate resin content, relative to the solids content of the polyurethane dispersion, is 1 to 80% by weight.

Claim 11

Dependent Claim 32 words

The process as claimed in claim 7, wherein the melamine resin and polyester and polyacrylate resin content is 20 to 60% by weight, relative to the solids content of the polyurethane dispersion.

Claim 12

Dependent Claim 62 words

The process as claimed in claim 4, wherein the coating agent for the base layer contains as additional binder components a blocked polyisocyanate together with a water-dilutable polyester resin and/or a water-dilutable polyacrylate resin, where the polyisocyanate and the polyester resin and/or the polyacrylate resin content is in total 1 to 80% weight, relative to the solids content of the polyurethane dispersion.

Claim 13

Dependent Claim 31 words

The process as claimed in claim 9, wherein the coating agent for the base layer contains 0.5 to 25% by weight of metal pigments, relative to the total binder solids content.

Claim 14

Dependent Claim 9 words

The product obtained by the process of claim 1.

Claim 15

Dependent Claim 9 words

The product obtained by the process of claim 2.

Claim 16

Dependent Claim 19 words

The process of claim 2, further comprising in said coating agent: flow-control agents, thixotroping agents, fillers, and organic solvents.

Claim 17

Dependent Claim 20 words

The coated substrate of claim 3, further comprising in said coating agent: flow-control agents, thixotroping agents, fillers, and organic solvents.

Claim 18

Dependent Claim 19 words

The process of claim 1, further comprising in said coating agent: flow-control agents, thixotroping agents, fillers, and organic solvents.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-12-18	1988-06-18	1988-12-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-12-18	1992-06-18	1992-12-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-12-18	1996-06-18	1996-12-18	$7700.00	Window Closed / Lapsed

Water-dilutable coating agent for preparing the base layer of a multilayer coating

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