US6486268B2
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Sealants containing multimodal polymer blends
Assignee: 3M Innovative Properties Co
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Filing: 2001-03-09
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Granted: 2002-11-26
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Expires: 2021-03-09
Abstract
Abstract A blend of multimodal average molecular weight sulfur or ether linkage containing organic polymers provides sealants, potting compounds and moldable compositions with good physical properties. In the case of S-containing polythioether or polysulfide, these properties are well suited to the formulation of aerospace sealants even using standard lightweight filler technology. Sealants based upon this multimodal blend concept exhibit improved strength and toughness even when relatively large amounts of lightweight fillers are used. Multimodal polyurethanes and other ether linkage containing polymers also show enhanced physical properties.
Inventors
- 👤 Jonathan D. Zook
- 👤 David W. Jordan
- 👤 Dean M. Willard
- 👤 George Jones
- 👤 Michael Cosman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:27
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/52; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; C08G65/32; C08G65/329; C08G65/333; C08G65/33348; C08L; C08L71/00; C08L71/02; C08L81/00; C08L81/02; C08L81/04; C09K3/1012; C08G2190/00; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/0243; C09K2200/0247; C09K2200/06; C09K2200/0645; C09K2200/0647; C09K2200/067
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
53 words
A composition comprising a multimodal polymer blend containing sulfur or ether linkages therein, said polymer blend having a ratio of between 2 and 4 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight wherein the minimum polymer mode average molecular weight is less than 1000 Daltons.
Claim 2
Dependent Claim
53 words
A composition comprising a multimodal polymer blend containing sulfur or ether linkages therein, said polymer blend having a ratio of between 2 and 4 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight wherein the minimum polymer mode average molecular weight is less than 1000 Daltons.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein said multimodal blend is a bimodal blend.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein the maximal polymer mode average molecular weight component is a weight percent majority constituent of said blend.
Claim 5
Dependent Claim
19 words
The composition of claim 1 wherein the maximal polymer mode average molecular weight is between 1000 and 6000 Daltons.
Claim 6
Dependent Claim
10 words
The composition of claim 1 wherein said blend comprises polythioethers.
Claim 7
Dependent Claim
10 words
The composition of claim 1 wherein said blend comprises polysulfides.
Claim 8
Dependent Claim
15 words
The composition of claim 1 wherein said blend comprises a mixture of polythioethers and polysulfides.
Claim 9
Dependent Claim
24 words
The composition of claim 1 wherein said blend comprises an ether linkage containing polymer selected from the group consisting of: polyurethanes, polyethers and polyesters.
Claim 10
Dependent Claim
34 words
A composition comprising a multimodal sulfur containing polymer blend, said blend having a ratio of greater than 1.5 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight.
Claim 11
Dependent Claim
34 words
A composition comprising a multimodal sulfur containing polymer blend, said blend having a ratio of greater than 1.5 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight.
Claim 12
Dependent Claim
10 words
The composition of claim 9 wherein said blend comprises polythioethers.
Claim 13
Dependent Claim
10 words
The composition of claim 9 wherein said blend comprises polysulfides.
Claim 14
Dependent Claim
15 words
The composition of claim 9 wherein said blend is a mixture of polythioethers and polysulfides.
Claim 15
Dependent Claim
38 words
The composition of claim 9 wherein said blend comprises a sulfur containing polymer having at least two reactive moieties, each reactive moiety independently selected from the group consisting of: mercapto, hydroxyl, primary amino, secondary amino, epoxy, and isocyano.
Claim 16
Dependent Claim
12 words
The composition of claim 13 wherein said sulfur containing polymer is bifunctional.
Claim 17
Dependent Claim
12 words
The composition of claim 13 wherein said sulfur containing polymer is polyfunctional.
Claim 18
Dependent Claim
23 words
The composition of claim 9 wherein the maximal polymer mode average molecular weight component is a weight percent majority constituent of said blend.
Claim 19
Dependent Claim
23 words
The composition of claim 16 wherein the maximal polymer mode average molecular weight constituent is greater than 60 weight percent of said blend.
Claim 20
Dependent Claim
24 words
The composition of claim 17 wherein the maximal polymer mode average molecular weight constituent is from 60 to 80 weight percent of said blend.
Claim 21
Dependent Claim
19 words
The composition of claim 9 wherein the maximal polymer mode average molecular weight is between 150 and 10,000 Daltons.
Claim 22
Dependent Claim
19 words
The composition of claim 9 wherein the maximal polymer mode average molecular weight is between 1000 and 6000 Daltons.
Claim 23
Dependent Claim
33 words
A process for preparing a composition of claim 1 which comprises: blending a plurality of polymer constituents, each having a modal distribution of average molecular weights; and curing said plurality of polymer constituents.
Claim 24
Dependent Claim
15 words
The process of claim 21 wherein said plurality of polymer constituents are sulfur containing polymers.
Claim 25
Dependent Claim
19 words
The process of claim 22 wherein curing said plurality of polymers occurs with an amine as a curing catalyst.
Claim 26
Dependent Claim
10 words
A product obtained by the process of claim 21 .
Claim 27
Dependent Claim
21 words
A commercial package comprising a composition according to claim 1 together with instructions for the use thereof as an aerospace sealant.
Claim 28
Dependent Claim
89 words
A composition comprising a multimodal polymer blend containing sulfur or ether linkages therein, said polymer blend having a ratio of between 2 and 4 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight wherein the minimum polymer mode average molecular weight is less than 1000 Daltons and the maximal polymer mode is no greater than 90 weight percent of the multimodal polymer blend, wherein when said multimodal blend contains only ether linkages that said blend is not uniformly terminated with hydroxyl groups.
Claim 29
Dependent Claim
89 words
A composition comprising a multimodal polymer blend containing sulfur or ether linkages therein, said polymer blend having a ratio of between 2 and 4 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight wherein the minimum polymer mode average molecular weight is less than 1000 Daltons and the maximal polymer mode is no greater than 90 weight percent of the multimodal polymer blend, wherein when said multimodal blend contains only ether linkages that said blend is not uniformly terminated with hydroxyl groups.
Claim 30
Dependent Claim
50 words
A composition comprising a multimodal sulfur containing polymer blend, said blend having a ratio of between 1.5 and 9.0 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight and the maximal polymer mode is no greater than 90% of the multimodal polymer blend.
Claim 31
Dependent Claim
50 words
A composition comprising a multimodal sulfur containing polymer blend, said blend having a ratio of between 1.5 and 9.0 for a maximal polymer mode average molecular weight and a minimal polymer mode average molecular weight and the maximal polymer mode is no greater than 90% of the multimodal polymer blend.
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| 3.5 Years (Year 4) | 2005-11-25 | 2006-05-27 | 2006-11-26 | $2000.00 | Window Closed / Lapsed |
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