Sealant remover

Patent metadata

Field	Value
Publication number	US-2024166917-A1
Application number	US-202318387155-A
Country	US
Kind code	A1
Filing date	Nov 6, 2023
Priority date	Nov 9, 2022
Publication date	May 23, 2024
Grant date	—

Abstract

A sealant removal composition provided that includes a pyrrolidone solvent, a non-ionic surfactant, and at least one co-solvent. The composition is well suited to removal sulfur-based polymer and silicone-based polymer sealant. A process of removing a sealant from a substrate is provided that includes applying the composition to the sealant. After allowing dwell time for the sealant to swell on the substrate, the sealant is removed.

First claim

1 . A sealant removal composition comprising:
one or more pyrrolidone solvents; a non-ionic surfactant; at least one co-solvent; and optionally at least one additive of solubilizing agents, dyes, fragrances, thickeners, water, and combinations thereof.

2 . The sealant removal composition of claim 1 wherein said one or more pyrrolidone solvent is present up to 45 total weight percent.

3 . The sealant removal composition of claim 1 wherein said pyrrolidone solvent has the cyclic structure (I):

where R 1 is hydrogen, or C 1 -C 3 linear alkyl; R 2 is hydrogen, C 1 -C 12 linear alkyl, C 1 -C 12 branched alkyl, C 5 -C 12 cyclic alkyl, or C 1 -C 12 linear alkoxy; and R is hydrogen, or —C 6 R 3 5 ; where R 3 in each occurrence is independently hydrogen, —C 6 H 5 , and substituted C 6 aryl with one or more hydrogen substituted by C 1 -C 12 linear alkyl, C 1 -C 12 branched alkyl, or C 5 -C 12 cyclic alkyl.

4 . The sealant removal composition of claim 1 wherein said pyrrolidone solvent is pyrrolidone, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-n-butyl-2-pyrrolidone, N-tert-butyl-2-pyrrolidone, N-cyclohexyl-2-pyrrolidone, N-n-butylpyrrolidone, N-isobutylpyrrolidone, N-t-butylpyrrolidone, N-n-pentylpyrrolidone, N-(methyl-substituted butyl)pyrrolidones, phenyl-methyl-substituted N-propylpyrrolidone, phenyl-methyl-substituted N-butyl pyrrolidone, N-(methoxypropyl)pyrrolidone, 1,5-dimethyl-pyrrolidone, and mixtures of any of the aforementioned.

5 . The sealant removal composition of claim 1 wherein said pyrrolidone solvent comprises 1-butylpyrrolidin-2-one.

6 . The sealant removal composition of claim 1 wherein said first non-ionic surfactant has a first surfactant HLB value of between 6 and 9 and said second non-ionic surfactant has a second surfactant HLB value of between 12 and 16.

7 . The sealant removal composition of claim 1 wherein said at least one co-solvent is present up to 90 total weight percent.

8 . The sealant removal composition of claim 1 said at least one co-solvent comprises at least one of a glyme, a polyether, an amide, or an acetal.

9 . The sealant removal composition of claim 8 wherein said glyme is present and has the structure (IV):
R—(OCHR 1 CHR 1 ) n —OR  (IV)

where R in each occurrence is independently C 1 -C 3 linear alkyl; R 1 in each occurrence is independently C 1 -C 3 linear alkyl and n is an integer value between 1 and 10.

10 . The sealant removal composition of claim 8 wherein said polyether is present and has the structure (IV):
R[—(O—R 1 —O—R 2 —] n   (V)

where R is C 1 -C 12 linear alkyl; R 1 in each occurrence is independently C 1 -C 12 linear alkyl, C 1 -C 12 branched alkyl, C 5 -C 12 cyclic alkyl; R 2 in each occurrence is independently C 1 -C 12 linear alkyl, C 1 -C 12 branched alkyl, C 5 -C 12 cyclic alkyl; and n is an integer value between 1 and 50.

11 . The sealant removal composition of claim 8 wherein said polyether is present and comprises: tetraoxaundecane, 1,3-dioxacyclopentane, 5-hydroxy-1,3-dioxane, 4-hydroxymethyl-1,3-dioxolane, tetrahydrofurfuryl alcohol, and mixtures of any of the aforementioned.

12 . The sealant removal composition of claim 8 wherein said acetal is present and comprises: diethoxymethane, dimethoxymethane, 1,3-dioxolane and mixtures of any of the aforementioned.

13 . The sealant removal composition of claim 8 wherein said polyether is present and has the general formula (VI):

where R is hydrogen, C 1 -C 12 linear alkyl, C 1 -C 12 branched alkyl, C 5 -C 12 cyclic alkyl, or C 1 -C 12 linear alkoxy.

14 . The sealant removal composition of claim 8 wherein said amide is present and comprises: N,N-dimethyl formamide, acetamide, N,N-dimethyl acetamide, N,N-dimethyloctanamide, N,N-dimethyldecanamide, and mixtures of any of the aforementioned.

15 . The sealant removal composition of claim 1 wherein the composition is exclusive of at least one of solvent of d-limonene; acetone, methyl ethyl ketone, methyl isobutyl ketone, mesityl oxide, isophorone; and petroleum distillates or all of the solvents.

16 . The sealant removal composition of claim 1 having a flash point of above >70° C. at 760 torr.

17 . A process of removing a sealant from a substrate comprising:
applying the composition of claim 1 to the sealant; and allowing dwell time for sealant to swell on the substrate.

18 . The process of claim 17 further comprising applying mechanical force to the sealant while the sealant is in contact with the composition.

19 . The process of claim 17 wherein the sealant is a silicone or sulfur-containing polymers.

20 . The process of claim 17 wherein the substrate is one of glass, metal, or concrete.

Assignees

• Illinois Tool Works

Inventors

• Cooper Donald
• Rhodes Matthew
• Long Jonathan A

Classifications

• C09J5/00 Primary

  Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers · CPC title

• C09J2301/502

  process for debonding adherents · CPC title

• C09J2483/00

  Presence of polysiloxane · CPC title

• C09J2481/00

  Presence of sulfur containing polymers · CPC title

• C09J2400/143

  in the substrate · CPC title