The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11167499 B1

Date of Patent:

Nov. 09, 2021

Filed:

Aug. 14, 2016

Cleaning composition

Applicant:

Stratasys Ltd., Rehovot, IL;

Inventor:

Mariana Pokrass, Rehovot, IL;

Assignee:

Stratasys Ltd., Rehovot, IL;

Attorney:

Primary Examiner:

Gregory R Delcotto

Int. Cl.

CPC ...

C11D 3/02 (2006.01); C11D 3/08 (2006.01); C11D 7/06 (2006.01); C11D 7/14 (2006.01); B29C 64/40 (2017.01); B33Y 70/00 (2020.01); B29C 64/112 (2017.01); G03G 9/087 (2006.01); C08F 283/06 (2006.01); C08F 220/28 (2006.01); C11D 3/04 (2006.01); C08F 2/48 (2006.01); B33Y 10/00 (2015.01); B33Y 40/00 (2020.01); B29C 64/35 (2017.01); B29C 35/08 (2006.01); G03F 7/00 (2006.01); G03F 7/027 (2006.01); B33Y 80/00 (2015.01); B29K 33/04 (2006.01);

U.S. Cl.

CPC ...

B29C 64/40 (2017.08); B29C 64/112 (2017.08); B29C 64/35 (2017.08); B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); B33Y 70/00 (2014.12); C08F 2/48 (2013.01); C08F 220/28 (2013.01); C08F 283/06 (2013.01); C11D 3/044 (2013.01); C11D 3/08 (2013.01); C11D 7/06 (2013.01); C11D 7/14 (2013.01); G03G 9/08722 (2013.01); G03G 9/08728 (2013.01); G03G 9/08793 (2013.01); G03G 9/08795 (2013.01); B29C 35/08 (2013.01); B29K 2033/04 (2013.01); B33Y 80/00 (2014.12); G03F 7/0037 (2013.01); G03F 7/027 (2013.01);

Abstract

Novel cleaning compositions, usable for removing a cured support material from a printed object obtained by additive manufacturing such as 3D inkjet printing are provided. The cleaning compositions are aqueous alkaline compositions containing a combination of two alkaline substances: an alkali metal hydroxide and an alkali metal silicate, each at a concentration of no more than 3 weight percents of the total weight of the composition. The cleaning compositions are characterized by high and constant dissolution rate, and are particularly useful for removing a cured support material that includes cross-linked polymeric chains such as cross-linked polyacrylate chains. Kits comprising the alkaline substances, and methods of fabricating a three-dimensional model object which utilize the cleaning compositions or the kits, and a three-dimensional model object fabricated thereby, are also provided.

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