John G Paul

Title: John G Paul: Innovator in Photopolymerization Processes

Introduction

John G Paul is a notable inventor based in Falkirk, GB. He has made significant contributions to the field of photopolymerization, holding a total of 3 patents. His work has advanced the understanding and application of photopolymerization processes, which are crucial in various industries.

Latest Patents

One of his latest patents is a photopolymerization process with two exposures of a single layer. This process involves a liquid composition containing a compound (A) that has at least one (meth)acryloyl group and a bicyclo[2.2.1]hept-2-ene-6-yl unit. The layer is exposed to actinic radiation, solidifying due to photopolymerization of (A) through the (meth)acryloyl group(s), while remaining photocrosslinkable. When desired, the solidified layer can be further exposed to a greater amount of actinic radiation, resulting in parts that become more highly photocrosslinked and hence insoluble. This innovative method allows for the production of images that can be developed using suitable solvents. Examples of compound (A) include 3-(methacryloyloxy)-2-hydroxypropyl bicyclo[2.2.1]hept-2-ene-6-carboxylate and 2-(acryloyloxy)ethyl methyl-5-carboxybicyclo[2.2.1]hept-2-ene-6-carboxylate.

Another significant patent by John G Paul is a photopolymerization process employing compounds containing acryloyl. This three-stage process also involves a liquid composition containing a compound (A) with at least one (meth)acryloyl group and a 2,3-disubstituted maleimido group. Similar to the previous patent, the layer solidifies upon exposure to actinic radiation, remaining further photocrosslinkable. The solidified layer can be exposed to a greater amount of actinic radiation, leading to parts that become more highly photocrosslinked through the disubstituted maleimido group(s). This process also allows for the development of images using suitable solvents. Examples of compound (A) in this patent include N-(2-(acryloyloxy