Yichang Xingyue New Materials Co., Ltd. won the 2025 Science and Technology Progress Award for its "Key Production Technology of Methyl Vinyl Silicone Rubber Based on Vinyl Molar Content." By precisely controlling vinyl content, it developed a 1.5-million molecular weight raw rubber, setting a new domestic record. Its low volatility (<1%) and high purity (colorless, transparent, odorless) excel in aerospace, new energy, and electronics.

In aviation, seals made from this rubber operate stably from -60℃ to 300℃, used in C919 fuel systems. In new energy, its chemical stability triples lithium battery separator corrosion resistance, extending cycle life to over 5,000 cycles. Electronics leverage its transparency for ultra-thin (0.1mm) flexible PCB substrates, meeting 5G miniaturization needs.

Optimized polymerization narrows molecular weight distribution to ±10,000, resolving batch inconsistency. For example, a model passed olive oil tests with 2 grades higher anti-yellowing and <0.5% defect rates. Annual output now exceeds 1 billion yuan across 110 (vinyl-terminated) and 112 (methyl-terminated) series.

Experts say this breakthrough positions China as a global leader in polymer materials, supporting high-end manufacturing.

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