JP2005527645A5

JP2005527645A5 -

Info

Publication number: JP2005527645A5
Application number: JP2003527013A
Authority: JP
Filing date: 2001-09-10
Publication date: 2008-11-06

Claims

A polymer vehicle comprising an aqueous dispersion of a polyester salt, wherein the polyester salt is a residue of a polyester having an acid number of at least 30, a number average molecular weight of at least 1500, and a hydroxyl number of 90 or less, the aqueous dispersion Is a polymer vehicle that is effective to provide said polymer vehicle with less than 5% by weight organic solvent.

The polyester salt, acid value of 40 to 50, hydroxyl number of 90 to 50, the polymer vehicle according to claim 1 is the residue of a polyester having a number average molecular weight of 1,500 to 2,800.

The polymer vehicle of claim 2, wherein the polyester salt in the aqueous dispersion has a particle size of less than 400 nm.

The polymer vehicle is effective to provide a cured primer coating composition film, and the primer coating composition film is part of a multilayer coating having at least two layers including the primer film; polymeric vehicle as claimed in claim 3 which is effective to provide a multi-layer paint coating having a 2 pint chip size of at least 2 pints chip number rating of 5, and at least a.

The polyester polymeric vehicle as claimed in claim 2 containing neutralized, the -COOH group capable of forming a dispersible salts in water.

The polyester polymeric vehicle as claimed in claim 1 comprising neutralized, the -COOH group capable of forming a dispersible salts in water.

The polymer vehicle of claim 3, wherein the polymer vehicle further comprises a cross-linking agent selected from the group consisting of amino resins, isocyanate compounds, and mixtures thereof.

30-50 acid number of the steps of forming a polyester having sufficient -COOH group to provide a polyester having a number average molecular weight, 50 to 90 hydroxyl number of from 1500 to 2800,
Mixing the polyester in an organic hydrophilic solvent, wherein the polyester polymer has a solubility in the hydrophilic solvent of at least 50 wt% , the organic hydrophilic solvent is at least 5 wt% in water Having a solubility in
Neutralizing at least 30% of the ionizable groups of the polyester with an amount of neutralizing agent effective to form a solution of neutralized polymer salt;
Mixing the neutralized polyester salt solution with water to form a water / organic solvent / neutralized polyester blend;
Stripping the organics from the blend of water / organic solvent / neutralized polyester blend at 65 ° C. or less to form a dispersion of the neutralized polyester salt in water. ,
The dispersion has a viscosity of less than 10 poise at a temperature 25 ° C.
Aqueous polymer dispersion .

The neutralizing agent is ammonia, triethanolamine, aqueous polymer dispersion according to claim 8 which is selected from the group consisting of 2-amino-2-methyl-1-propanol, and dimethyl ethanolamine.

9. The aqueous polymer of claim 8 wherein water is added to the neutralized polyester salt solution in an amount effective to provide an initial ratio of organic solvent to water of 0.15 to 0.45. Dispersion.

Organic solvent, an aqueous polymer dispersion according to claim 10 to be removed without inversion.

It said method, an aqueous polymer dispersion according to claim 8 which is effective to provide a polyester salts of said aqueous dispersion having an average particle size of less than or equal to 400 nm.

An aqueous dispersion of a polyester salt, wherein the polyester salt has a number average molecular weight and from 90 to 50 hydroxyl number in the range of 1500 to 2800, and the residue of a polyester having an acid number of 40 to 50, the polyester Is an aqueous dispersion having —COOH groups that can be neutralized to form a water dispersible polyester salt.

The polyester has a number average molecular weight of 1500, and an aqueous dispersion of a polyester salt according to claim 13 having a hydroxyl number of 90.

The polyester has a number average molecular weight of 2800, and an aqueous dispersion of a polyester salt according to claim 13 having a hydroxyl number of 50.

A multilayer paint coating having a two pint tip rating of at least 5 and a two pint chip size of at least A resulting from coating a substrate with a polymer vehicle, wherein the polymer vehicle comprises an aqueous dispersion of a polyester salt. A multilayer paint coating comprising, wherein the polyester salt is the residue of a polyester having a number average molecular weight of at least 1500 and a hydroxyl number of 90 or less.