Pasteurizing paints and method for pasteurizing paints

Patent metadata

Field	Value
Publication number	US-10639386-B2
Application number	US-201515532577-A
Country	US
Kind code	B2
Filing date	Nov 25, 2015
Priority date	Dec 4, 2014
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

Disclosed herein are methods for pasteurizing architectural coating compositions using heat, radiation or other energy sources without additionally polymerizing the compositions and storing same.

First claim

We claim:

1. A method for pasteurizing a paint or stain composition comprising the steps of
(i) preparing the paint or stain composition, wherein the paint or stain composition comprises latex particles that when applied to a substrate form a paint film;
(ii) treating said paint or stain composition with at least a conduction heat source and/or a convection heat source to raise its temperature to a temperature range from about 49° C. to about 72° C. and for a time period from at least about 120 minutes to at least about 2 minutes; and
(iii) storing the treated paint or stain composition in containers.

2. A method for pasteurizing a paint or stain composition comprising the steps of
(i) preparing the paint or stain composition, wherein the paint or stain composition comprises latex particles that when applied to a substrate form a paint film;
(ii) heating the paint or stain composition with at least a conduction heat source and/or a convection heat source to a temperature and time duration between and including the following equations:
T (°C)=0.0025· t (min) 2 −0.489· t (min)+72.224  (1)

T (°C)=0.0044· t (min) 2 −0.652· t (min)+72.224  (2)

wherein T(°C.) is a Pasteurized temperature and t(min) is the minimum time to hold at the Pasteurized temperature,
wherein a domain for equation (1) is from 3 minutes to 120 minutes and a domain for equation (2) is from 2.25 minutes to 90 minutes; and
(iii) storing the treated paint or stain composition in containers.

3. The method of claim 1 , wherein said temperature range is from about 49° C. to about 65° C.

4. The method of claim 1 , wherein said temperature range is from about 60° C. to about 71° C.

5. The method of claim 1 , wherein said temperature range is from about 60° C. to about 65° C.

6. The method of claim 1 , wherein the paint or stain composition is stored in containers before step (ii).

7. The method of claim 1 , Wherein the paint or stain composition contains biocides.

8. The method of claim 1 , wherein the paint or stain composition contains substantially no biocide.

9. The method of claim 1 , wherein step (iii) comprises storing the pasteurized paint or stain composition at temperatures that discourages or inhibits growth of biological agents.

10. The method of claim 9 , wherein said temperatures include temperatures below ambient temperature.

Assignees

• Columbia Insurance Co

Inventors

• Sheerin Robert
• Siegfried David L
• Mardis Wilbur
• Ritzke John
• Tilara Navin

Classifications

• A61L2/04

  Heat (radiation A61L2/08) · CPC title

• C09D5/14

  Paints containing biocides, e.g. fungicides, insecticides or pesticides (C09D5/16 takes precedence) · CPC title

• B65B55/14

  by heat · CPC title

• A61L2/081 Primary

  Gamma radiation · CPC title

• A61L2202/18

  Aseptic storing means · CPC title