Silicone Elastomer Adhesive Patents: Leaders & Filing Trends 2026
- Filing has cooled, not grown. Filings peaked at 48 in 2020 and had fallen to 14 by the 2022 midpoint, a decline pattern rather than the growth curve most landscape searches expect.
- Adhesives and polymer composition claims dominate. C09J and C08L together cover over 60% of the 855 families, meaning core formulation space is dense while adjacent processing and coating classes are comparatively open.
- No assignee shows recent-year momentum. Every major filer in the ranking, including Shin-Etsu and Dow Silicones, recorded zero filings in the latest year — a sign the field's active filers have shifted timing or that publication lag is masking new activity.
Filing growth compares 2021 (35 records) with 2024 (10) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 855 records in scope (CR5), not by the ranked leaders only.
What the silicone elastomer adhesive formulation patent landscape shows
Silicone elastomer adhesive formulation sits at the intersection of polymer chemistry and adhesive engineering: claims typically combine an organopolysiloxane backbone with curing chemistry and additive packages tuned for pressure-sensitive or self-adhesive performance. Across 855 patent families published between 2015 and the 2026 cut-off, filing activity is concentrated in core composition and adhesive classes, with a visible tail into medicinal preparations, coatings and laminates where silicone adhesives serve as a functional layer rather than the primary invention.
The filing trend is not a growth story. Activity peaked in 2020 and had already declined by the 2022 midpoint, and the most recent year should be read with the usual caveat that publication lags filing by roughly 18 months, so 2025-2026 counts are structurally incomplete rather than evidence of a stopped field.
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Filing trend and technology composition
The two views below cut the same 855-family dataset by year and by IPC subclass, showing when the field was most active and where its claim density actually sits.
A peak-and-decline filing pattern
Filings rose to a peak of 48 in 2020, then fell — by 2022 the annual count was down to 14. That trajectory suggests the field's core formulation chemistry was substantially staked out in the late 2010s, with later years contributing incremental rather than foundational filings.
Adhesives and polymer composition lead, medical and coatings trail
C09J (Adhesives, 275 records) and C08L (Polymer compositions, 267) are the two largest subclasses, followed by C08K additive claims (162) and B32B laminate structures (111). A61K medicinal preparations (79) and C09D coatings (75) show silicone adhesive chemistry migrating into adjacent application domains at meaningfully lower density.
Shares are the percentage of the 855 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Silicone Elastomer Adhesive Formulation with Eureka
This page is one run against one query. Ask Eureka your own question about silicone elastomer adhesive formulation and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited prior art and a representative recent filing
US20220064449A1 — Addition-curable self-adhesive silicone rubber composition
Filed by Shin-Etsu Chemical, this 2022 application claims an addition-curable self-adhesive silicone rubber composition built from an alkenyl-group organopolysiloxane, a phenylene-skeleton organosilicon compound, and an organohydrogen polysiloxane cross-linker — a three-component route to self-adhesion without a separate primer layer.Abstract condensed from the original filing for length.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | JP1992008788A | Cover sponge packing assembly for hard disc device | 114 |
| 2 | US4257936A | Self-bonding silicone compositions | 107 |
| 3 | US4690683A | Transdermal varapamil delivery device | 106 |
| 4 | US5366805A | Polycarbonate resin/silicone rubber integrally molded article and method for making | 101 |
| 5 | US5536803A | Adhesive silicone compositions | 97 |
| 6 | US4837047A | Container and method for storing blood | 95 |
| 7 | WO2006028612A1 | Silicone adhesive formulation containing an antiperspirant | 89 |
| 8 | US5258211A | Coating composition for air bags and air bag | 89 |
| 9 | US5944324A | Article made of brittle material encapsulated in an injection-molded plastic holding frame | 85 |
| 10 | EP3424471A1 | Stool receptacle of stool processing device for use in nursing care | 77 |
Citation counts reflect influence within the searched corpus and skew toward older records; treat them as a signal of foundational status, not current relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns in the data matter more than the raw counts: where claim density sits, how citation age skews the most-cited list, and what the co-filing pairs reveal about how work actually gets done.
Core adhesive and composition claims are the densest ground
Adhesives (C09J) and polymer compositions (C08L) together account for more than 60% of the corpus. A new filing anchored purely on organopolysiloxane-plus-cure-package composition is filing into the most contested part of the landscape.
The most-cited prior art predates the current filing window
The highest-cited records — including a 1992 hard-disc packing patent and a 1980 self-bonding silicone composition — sit well outside the 2015-2026 window. Their citation counts reflect decades of accumulated influence, not that they represent current best practice.
Co-assignee activity is concentrated in one corporate family
Of only 10 identified co-assignee pairs, the strongest pairing links two entities within the same corporate group at 22 shared families — far ahead of the next pairing at 7. Cross-company joint filing is rare in this dataset.
No assignee shows visible recent-year activity
Every major filer in the momentum ranking, from Shin-Etsu to Dow Silicones to Wacker, shows zero filings in the latest tracked year. Given the roughly 18-month publication lag, this is more likely a data-completeness artefact than a true stop in R&D.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to silicone elastomer adhesive formulation, with the prior art for and against each one.
Who holds the claim space
The assignee ranking is dominated by a small set of established silicone chemistry manufacturers, with a long tail of single- or few-filing entrants. Co-filing is rare, and joint activity that does exist tends to sit within a single corporate family.
Established silicone majors anchor the top of the ranking
Shin-Etsu Chemical, Dow Silicones, Wacker Chemie and Shin-Etsu Polymer appear repeatedly across the ranking and the co-assignee data, consistent with formulation know-how concentrated among vertically integrated silicone producers rather than downstream adhesive converters.
Joint filings mostly reflect internal corporate structure
The strongest co-assignee pair links Dow Silicones with Dow Global Technologies — sister entities rather than external collaborators. A second pairing between Shin-Etsu Chemical and Sony Group (7 shared families) is the clearest example of cross-industry collaboration in the dataset.
Medical and coatings applications bring in adjacent filers
The presence of 79 A61K records and 75 C09D coating records suggests filers outside the core silicone-supplier group — medical device and coatings companies — are patenting silicone adhesive formulations tuned to their own application, rather than the base chemistry itself.
| Assignee | Recent year | YoY |
|---|---|---|
| Shin-Etsu Chemical Co., Ltd. | 0 | — |
| Dow Silicones Corporation | 0 | — |
| TEPE Munhygienprodukter AB | 0 | — |
| Wacker Chemie AG | 0 | — |
| Shin-Etsu Polymer Co., Ltd. | 0 | — |
| 3M Innovative Properties Company | 0 | — |
| Dow Global Technologies LLC | 0 | — |
| Adhil | 0 | — |
Where to take this next
The landscape points to a mature core with pockets of open claim space at its edges. Two directions are worth pursuing depending on whether the goal is defensive clearance or new filing.
Run a freedom-to-operate check against the dense classes
Before drafting composition claims in C09J or C08L, screen against the incumbent silicone suppliers' portfolios identified here — this is the most heavily claimed ground in the dataset.
Explore prior art in Eureka →Scope filings toward the under-claimed branches
Primerless self-adhesion, phenylene cross-linker chemistry and medical-grade adhesive packages show lower filing density relative to core composition claims and may offer more open drafting room.
Map white space in Eureka →Frequently asked questions
The ranking is led by established silicone chemistry manufacturers, particularly Shin-Etsu Chemical, Dow Silicones and Wacker Chemie, all of whom appear repeatedly across the 855-family dataset. These companies are vertically integrated silicone producers rather than downstream adhesive converters, which is consistent with formulation know-how concentrating close to the base polymer chemistry. A smaller tail of application-specific filers, including medical device and coatings companies, appears in adjacent IPC classes such as A61K and C09D.
Declining, at least on the data available so far. Filings peaked at 48 in 2020 and had fallen to 14 by the 2022 midpoint, a clear downward trend rather than sustained growth. That said, publication lags filing by roughly 18 months, so the most recent one to two years in any such dataset will always look artificially low and should not be read as a hard stop in R&D activity.
C09J covers adhesives specifically, while C08L covers polymer compositions more broadly, including silicone formulations that are not adhesive-specific. In this dataset the two classes overlap heavily and together account for over 60% of all 855 families, making them the two densest areas of claim coverage. A new filing that only addresses composition without an adhesive-specific application angle risks landing in the most contested part of the landscape.
The clearest under-claimed areas relative to the dense core composition classes include primerless self-adhesion chemistry, phenylene-skeleton cross-linker systems, and medical-grade biocompatible adhesive packages. These sit adjacent to the heavily filed C09J and C08L classes but show comparatively lower density in the current corpus. Any filing here should still be checked against the incumbent suppliers' portfolios, since companies like Shin-Etsu are already active in adjacent cross-linker chemistry.
Citation counts accumulate over time within a searched corpus, so older records such as a 1980 self-bonding silicone composition or a 1992 hard-disc packing patent naturally rank highest simply by having had more years to be cited. This is a signal of foundational influence, not of current commercial relevance or best practice. Readers evaluating today's competitive landscape should treat high citation counts as evidence a record shaped later claim drafting, not as a ranking of present-day importance.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.