A client asked me: When was PDCPD (Polydicyclopentadiene) first used in the United States and Japan? Who invented it?

This is a very insightful question — PDCPD did not appear out of nowhere. It is the result of a breakthrough in catalytic chemistry combined with the maturation of industrial processes. Once we clarify the timeline, the picture becomes very clear.

I. Who Invented PDCPD (The Essential Answer)

Strictly speaking, the PDCPD material itself was not "invented by a single person." It is built upon a more fundamental chemical reaction — Ring-Opening Metathesis Polymerization (ROMP).

Key Figures (The True "Source")

1. 1.

   Yves Chauvin
   Proposed the mechanism of the metathesis reaction (1970s).

2. 2.

   Robert H. Grubbs
   Developed stable, industrially applicable catalysts (1990s).

3. 3.

   Richard R. Schrock
   Advanced the development of metal carbene catalytic systems.

👉 These three scientists were awarded the 2005 Nobel Prize in Chemistry for their contributions to metathesis reactions.

*(Note: The 2005 Nobel Prize in Chemistry was awarded by the Nobel Foundation to Yves Chauvin, Robert H. Grubbs, and Richard R. Schrock for their work on olefin metathesis. The award was announced on October 5, 2005, and the ceremony was held on December 10, 2005, at the Stockholm Concert Hall in Sweden.

• Yves Chauvin: French, Honorary Director of the French Institute of Petroleum, 75 years old at the time of the award.

• Robert H. Grubbs: American, organic chemist who developed widely used ruthenium catalysts.

• Richard R. Schrock: American, organic chemist who was the first to produce effective metal compound catalysts.)*

✔ Key point: Without ROMP (Ring-Opening Metathesis Polymerization), there would be no industrialization of PDCPD.

II. When Was PDCPD "First Used" (United States)

This needs to be divided into two stages:

1. Laboratory Stage (1960s – 1970s)

• DCPD monomer had long existed as a by-product of petroleum cracking.

• However, at that time: catalysts were unstable, and the reaction was uncontrollable.
  👉 It was limited to research and could not be industrialized.

2. Industrial Starting Point (The Real Key)

👉 Late 1980s – United States

Landmark Event: Hercules Incorporated and BFGoodrich began developing:
👉 RIM (Reaction Injection Molding) + PDCPD system

✔ First True Commercial Application (United States)
👉 Time: Approximately 1985–1990
👉 Applications: Engineering equipment housings, agricultural machinery components, automotive structural parts

👉 One-sentence conclusion: The first "practical use" of PDCPD in the United States was in the late 1980s, when it entered the industrial sector through RIM technology.

III. Japan's First Application (Crucial but Little Known)

Japan was not the inventor of PDCPD, but it is one of the countries that "optimized PDCPD for engineering applications" to the greatest extent.

Timeline:
👉 Early 1990s (slightly later than the United States)

Representative Enterprises:
👉 Mitsui Chemicals, Inc.
👉 Zeon Corporation

Application Directions (with a distinct Japanese style):

• Precision structural components (more refined than those in the US)

• Automotive exterior parts

• Industrial equipment housings

What was Japan's contribution?
It was not "invention", but rather: transforming PDCPD from "usable" to "reliable, stable, and mass-producible".
This is reflected in:

• Optimized mold design

• Improved process stability

• Strict control of surface quality

IV. A Common Misconception

Many people ask: "Was PDCPD invented by a specific company?"
Answer: No.
✔ It is the result of the maturation of a complete technological system.

The actual technology chain is:

1. 1.Petrochemical industry → DCPD raw material

2. 2.Catalytic chemistry → ROMP (Ring-Opening Metathesis Polymerization)

3. 3.Process engineering → RIM (Reaction Injection Molding)

4. 4.Industrial manufacturing → PDCPD products

👉 None of these links can be missing for PDCPD to exist as an industrial material!

V. Why Did PDCPD Only Truly Emerge in the 1980s?

The core reason is simple: catalysts were not mature enough before that ❗

Before Robert H. Grubbs' breakthrough:
Catalysts had the following issues:

• Unstable activity

• Prone to deactivation

• High cost
  👉 They were simply not viable for industrial use.

VI. Timeline Summary (A Clear Overview)

• 1950s: DCPD emerged as a petrochemical by-product

• 1970s: Yves Chauvin proposed the ROMP mechanism

• 1980s: Catalysts matured (led by Robert H. Grubbs and others)

• 1985–1990: First industrial application in the US (RIM + PDCPD)

• 1990s: Japan optimized the technology and achieved large-scale production

VII. The Essential Takeaway

PDCPD is not a "material that was invented out of thin air", but rather the convergence of chemistry, process engineering, and industrial demand that took place in the 1980s.

VIII. The Booming Development of PDCPD in China

Since 2015, China has been able to independently mass-produce PDCPD raw material formulations. Among them, the formulations from Dacheng Purui are the most stable. The China PDCPD Industry Alliance was also established, with Jiangsu Judsh New Material Technology Co., Ltd. as one of its members, actively improving PDCPD process advantages.

PDCPD is mainly produced via RIM (Reaction Injection Molding). Under the current manufacturing requirements of high strength, high technology, and high-volume production, Jiangsu Judsh New Material Technology Co., Ltd. provides one-stop services covering mold development, product design, equipment manufacturing, and product production.