US3925331A
Expired / Lapsed
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Polymeric sealants
Assignee: Solvay Solutions UK Ltd
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Filing: 1973-11-27
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Granted: 1975-12-09
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Expires: 1993-11-27
Abstract
Abstract A moisture curable sealant composition in the absence of polysulphide curing agents which comprises the product of reacting under anhydrous conditions a polysulphide of formula HS ((CH2(R'')bCH2Sa)c (R''''Sa)d(SH)f) CH2(R'')bCH2SH where a is 1-5, b is 0 or 1, c is 1-200 d is 0-0.05c and 0.05c > OR = f > OR = d, 1 > OR = f and f is d times (No. of free valencies in R'''' - 2), R'' is O, S, or divalent saturated radical consisting of CH and optionally O and/or S in COC, CSC or OH links, R'''' is an at least trivalent saturated radical consisting of CH and optionally O and/or S in COC, CSC or OH links, with a silane of formula Qn SiX4-n where n is 1 or 2, Q is organic group containing an epoxide or mercapto group, CH2 CR14COO Cm 1H2m 2or CH2 CR15-Cm H2m-, where mis 0, 1, 2 or 3 and R14 and R15 are hydrogen or C1-4 alkyl, at least 2X are organic hydrolizable groups and the remaining X (if any) is C1-6 alkyl or chloroalkyl, the silane having 1 or 2 groups capable of reaction with SH, the silane reacting with 3-30% of the SH groups of the polysulphide, and the reaction with the mercapto silane occurring in the presence of a base of pK at least 9. The sealant composition when formulated with fillers, and optionally plasticizers, curing catalysts and curing inhibitors is cured with moisture to give a product having an extensibility of 50-200% and recovery of at least 75%.
Inventors
- 👤 Christopher Scott Ely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1012; C08; C08G; C08G75/00; C08G75/02; C08G75/14; C09J; C09J181/00; C09J181/04; C09K2003/1034; C09K2003/1056; C09K2200/00; C09K2200/02; C09K2200/0239
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
40 words
A MOISTURE CURABLE SEALANT COMPOSITION MAINTAINED UNDER ANHYDROUS CONDITIONS AND CONTAINING UNREACTED SH GROUPS AND IN THE ABSENCE OF PEROXIDES OR TIN COMPOUNDS, SAID SEALANT COMPRISING THE PRODUCT OF REACTING UNDER ANHYDROUS CONDITIONS (I) A POLYSULPHIDE OF THE STATISTICAL FORMULA
Claim 2
Dependent Claim
40 words
A MOISTURE CURABLE SEALANT COMPOSITION MAINTAINED UNDER ANHYDROUS CONDITIONS AND CONTAINING UNREACTED SH GROUPS AND IN THE ABSENCE OF PEROXIDES OR TIN COMPOUNDS, SAID SEALANT COMPRISING THE PRODUCT OF REACTING UNDER ANHYDROUS CONDITIONS (I) A POLYSULPHIDE OF THE STATISTICAL FORMULA
Claim 3
Dependent Claim
14 words
A composition according to claim 1 wherein the silane is of formula Q SiX3.
Claim 4
Dependent Claim
12 words
A composition according to claim 1 wherein R'''' is a trivalent radical.
Claim 5
Dependent Claim
10 words
A composition according to claim 3 wherein R'''' is a
Claim 6
Dependent Claim
42 words
A composition according to claim 1 wherein b 1 and R'' is a divalent radical free of aliphatic unsaturation consisting of C and H atoms and at least one of O and S atoms in the form of C-O-C or C-Sa-C links.
Claim 7
Dependent Claim
16 words
A composition according to claim 4 wherein R'' is a CH2 O CH2 O CH2 radical.
Claim 8
Dependent Claim
16 words
A composition according to claim 5 wherein R'' is a CH2 O CH2 O CH2 radical.
Claim 9
Dependent Claim
14 words
A composition according to claim 2 wherein Q is selected from groups of formula
Claim 10
Dependent Claim
14 words
A composition according to claim 8 wherein Q is selected from groups of formula
Claim 11
Dependent Claim
12 words
A composition according to claim 9 wherein Q is a vinyl group.
Claim 12
Dependent Claim
32 words
A composition according to claim 2 wherein at least 2 groups X are alkoxy groups of 1-6 carbon atoms and any remaining group X is an alkyl group of 1-6 carbon atoms.
Claim 13
Dependent Claim
27 words
A composition according to claim 11 wherein 2 groups X are methoxy or ethoxy groups and the remaining group X is a methyl, methoxy or ethoxy group.
Claim 14
Dependent Claim
18 words
A composition according to claim 12 wherein the silane is vinyl triethoxy silane or vinyl methyl dimethoxy silane.
Claim 15
Dependent Claim
18 words
A composition according to claim 1 wherein 3-15% of the SH groups of the polysulphide have been reacted.
Claim 16
Dependent Claim
14 words
A composition according to claim 1 wherein in the polysulphide f is 0.001 -0.2.
Claim 17
Dependent Claim
13 words
A composition according to claim 15 wherein in the polysulphide c is 40-85.
Claim 18
Dependent Claim
19 words
A composition according to claim 15 which comprises the product of reacting under anhydrous conditions a polysulphide of formula
Claim 19
Dependent Claim
19 words
A composition according to claim 1 which comprises the product of reacting under anhydrous conditions a polysulphide of formula
Claim 20
Dependent Claim
15 words
A composition according to claim 18 wherein R'' is a CH2O CH2 O CH2 radical.
Claim 21
Dependent Claim
31 words
A composition according to claim 19 wherein the silane is selected from the group consisting of vinyl triethoxysilane, vinyl methyl dimethoxy silane, 3-triemethoxy silyl propyl methacrylate and 3 - glycidoxypropyl-1-trimethoxy silane.
Claim 22
Dependent Claim
20 words
A composition according to claim 20 wherein the silane has reacted with 5-20% of the SH groups of the polysulphide.
Claim 23
Dependent Claim
41 words
A composition according to claim 1 which also contains 0.5-10% by weight of a silane hydrolysis inhibitor of formula Zn Si(OZ'')4-n , wherein n'' if 0, 1 or 2, Z is alkyl or aryl and Z'' is methyl ethyl or acyl.
Claim 24
Dependent Claim
17 words
A composition according to claim 22, wherein the inhibitor is methyl trimethoxy silane or methyl triacetoxy silane.
Claim 25
Dependent Claim
42 words
A composition according to claim 18 which also contains 0.5-10% by weight of a silane hydrolysis inhibitor of formula Zn Si (OZ'')4-n , wherein n'' is 0, 1 or 2, Z is alkyl or aryl and Z'' is methyl ethyl or acyl.
Claim 26
Dependent Claim
88 words
A process for preparing a moisture curable sealant composition maintained under anhydrous conditions and containing unreacted SH groups, which process comprises reacting under anhydrous conditions in the absence of peroxides, tin compounds a polysulphide as defined in claim 1 with a silane as defined in claim 1, whereby the proportion of the SH groups of the polysulphide which react with the silane is 3-30%, and the reaction with a silane containing a mercapto group being carried out in the presence of a base of pK at least 9.
Claim 27
Dependent Claim
13 words
A process according to claim 25 wherein the silane is of formula QSiX3.
Claim 28
Dependent Claim
12 words
A process according to claim 26 wherein R'''' in the polysulphide is
Claim 29
Dependent Claim
10 words
A process according to claim 27 wherein R'' is CH2OCH2OCH2.
Claim 30
Dependent Claim
28 words
A process according to claim 26 wherein two of groups X represent methoxy or ethoxy groups and the remaining group X represents a methoxy, ethoxy or methyl group.
Claim 31
Dependent Claim
16 words
A process according to claim 29 which comprises reacting under anhydrous conditions a polysulphide of formula
Claim 32
Dependent Claim
24 words
A water impermeable pack maintaining under anhydrous conditions a sealant formulation comprising a sealant composition as claimed in claim 1 together with a filler.
Claim 33
Dependent Claim
21 words
A water impermeable pack maintaining under anhydrous conditions comprising a sealant composition as claimed in claim 18 together with a filler.
Claim 34
Dependent Claim
22 words
A pack according to claim 31 which comprises 10-60% by weight (based on the weight of the formulation) of said sealant composition.
Claim 35
Dependent Claim
11 words
A pack according to claim 33 which also contains a plasticizer.
Claim 36
Dependent Claim
17 words
A pack according to claim 33 which also contains a moisture curing catalyst which is of formula
Claim 37
Dependent Claim
17 words
A pack according to claim 35 wherein the catalyst is tetraisopropyl titanate or diisopropyl titanium bis(acetyl acetonate).
Claim 38
Dependent Claim
25 words
A pack according to claim 34 wherein the formulation comprises 10-60% by weight of sealant composition, 30-40% of filler and 20-45% by weight of plasticizer.
Claim 39
Dependent Claim
47 words
A pack according to claim 33 which also comprises 0.5-10% by weight (based on the weight of the sealant composition) of a hydrolysis inhibitor of formula Zn Si(OZ'')4-n wherein n'' is 0, 1 or 2, Z is alkyl or aryl and Z'' is methyl, ethyl or acyl.
Claim 40
Dependent Claim
14 words
A pack according to claim 38 wherein the inhibitor is methyl trimethoxysilane or methyltriacetoxysilane.
Claim 41
Dependent Claim
26 words
A cured sealant having an extensibility by 50-200% and recovery of at least 75% obtained by treating with moisture a formulation as defined in claim 31.
Claim 42
Dependent Claim
26 words
A cured sealant having an extensibility by 50-200% and recovery of at least 75% obtained by treating with moisture a formulation as defined in claim 37.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |