01 / Executive brief
Executive summary
Syntactic foam looks unremarkable, but microscopic hollow spheres let it provide buoyancy under extreme pressure in deep-sea oil, research, and military applications. Trelleborg spent decades developing formulations and manufacturing controls for the material. A China-based venture funded a Houston affiliate led by Shan Shi to acquire and reproduce that capability. S1S2S3
Shi's company recruited people with Trelleborg access, obtained protected recipes and process information, and passed technical data to China. A jury convicted Shi of one trade-secret conspiracy and he received 16 months in prison and more than $330,000 in forfeiture. The jury acquitted him of economic espionage and money laundering, and the D.C. Circuit later affirmed the surviving conviction. S1S2S3
A scanning electron micrograph shows the hollow glass microspheres that give syntactic foam its low density and pressure resistance. This is contextual microscopy, not a Trelleborg exhibit from the trial.
Nikgupt / Wikimedia Commons · Creative Commons Attribution-ShareAlike 3.0 ↗02 / The vignette
What happened
The target was a material system, not a single formula
Deep-rated syntactic foam depends on hollow microspheres, resin chemistry, raw-material selection, mixing, curing, and quality controls working together. The court record described Trelleborg information ranging from formulations and supplier details to manufacturing parameters—exactly the package needed to move from laboratory samples toward repeatable production. S1S3
Recruiting created the acquisition channel
China-based CBMF provided roughly $3.1 million to establish and operate Construct Better Materials International in Houston. Shi's venture identified Trelleborg personnel with relevant access and hired or worked with them. Information then flowed through spreadsheets, messages, samples, and technical collaboration rather than a single dramatic break-in. S2S3
The verdict drew a line between theft and espionage
The jury concluded that Shi joined a conspiracy to steal Trelleborg trade secrets, but it did not convict him of economic espionage or money laundering. The appellate court upheld the trade-secret conviction. That distinction matters: documented China-based funding and customers provide a nexus, while the acquittal prevents this archive from claiming that the government-benefit element was proved beyond a reasonable doubt. S1S2S3
03 / Anatomy
How access became transfer
This chain reconstructs the sequence supported by the cited record. It does not imply that every legitimate relationship follows the same path.
- 01
- 02
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- 04
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04 / Evidence boundary
What is established—and what is not
Established in the record
05 / Sequence
Timeline
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Undercover meeting and arrests
An undercover presentation exposed the program's technical progress and intended applications before arrests. S2
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Mixed jury verdict
Shi was convicted of trade-secret conspiracy and acquitted of economic espionage and money laundering. S1
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Conviction affirmed
The D.C. Circuit rejected Shi's appeal and affirmed the surviving conviction. S3
06 / People and institutions
Who appears in the public record
Shan Shi
President of Houston-based CBMI
Outcome: Convicted of trade-secret conspiracy; acquitted of economic espionage and money laundering
Construct Better Materials International (CBMI)
Houston vehicle used to recruit personnel and develop syntactic foam
CBMF
China-based partner that funded CBMI and received technical information
Originator / affected institution
Trelleborg Offshore
Developer and owner of protected syntactic-foam technology
07 / Consequences
Documented and attributed harm
08 / Hindsight analysis
Where leadership could have seen risk
These are our analytic judgments based on the public record, not court findings. They are framed to improve controls without treating nationality as a risk factor.
The target was a whole production recipe
Individual spreadsheets and supplier details became strategically valuable when combined with formulations, samples, and experienced personnel.
Former and current staff formed a bridge
Recruiting around one specialist company created multiple paths back into the same protected development program.
09 / Apply the lesson
Actions leaders can take
- companies
Model competitor hiring clusters
Review coordinated recruitment of current and former staff who together could reconstruct a protected manufacturing process.
- companies
Protect supplier and parameter data
Treat bills of material, supplier identities, tolerances, and failed experiments as part of the crown-jewel package.
- both
Preserve count-level outcomes
Record each conviction and acquittal separately so a trade-secret finding is not restated as an espionage conviction.
10 / Source record
Sources
Links point to the public record reviewed for this file. Government releases can summarize court proceedings but remain government-authored sources; the source note identifies those limits.
- S1 government release
Texas Man Convicted of Conspiracy to Commit Theft of Trade Secrets ↗
U.S. Department of Justice · Published Jul 29, 2019 · Retrieved Aug 23, 2026
- S2 government release
American Businessman Sentenced in Theft of Syntactic Foam Trade Secrets ↗
U.S. Department of Justice · Published Feb 11, 2020 · Retrieved Aug 23, 2026
- S3 court record
United States v. Shan Shi, Opinion Affirming Conviction ↗
U.S. Court of Appeals for the District of Columbia Circuit · Published Mar 23, 2021 · Retrieved Aug 23, 2026