Functionalized vinyl polymer nanoparticles

Abstract

Nanoparticles of functionalised, cross-linked vinyl polymer, usable as reinforcing filler in a polymeric matrix. The vinyl polymer is a copolymer of at least the following monomers, which are all copolymerisable by free-radical polymerisation: a non-aromatic vinyl monomer “A”; a monomer “B” bearing a function Z of formula ≡Si—X, where X represents a hydroxyl or hydrolysable group; and a cross-linking monomer “C” which is at least bifunctional from the point of view of the polymerisation. The vinyl polymer is preferably a polymethacrylate, in particular a copolymer of methyl methacrylate (monomer A), trimethoxysilylpropyl methacrylate (monomer B) and ethylene glycol dimethacrylate (monomer C), being in the form of nanobeads the diameter of which is of between 10 and 100 nm.

Description

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AI Technical Summary

Benefits of technology

The patent describes how certain materials can be made up of smaller parts called nanoparticles that can aggregate together to create larger structures like secondary particles. These secondary particles can then break down back into individual nanoparticles when exposed to an external force such as mechanical work. This technology allows for better control over the size and structure of material components which could have various applications including improving manufacturing processes and making new products with specific properties.

Problems solved by technology

The patent text discusses the problem of reducing the weight of polymeric matrices, such as rubber used in the manufacture of tyres, while maintaining their strength. The use of new, highly dispersible silicas (“HD” silicas) as reinforcing fillers has increased the weight of the matrices due to their slightly greater density for an equivalent reinforcing ability. However, the patent text describes the discovery of certain synthetic organic fillers that can replace conventional carbon blacks for tyres, providing a solution to reduce the weight of the matrices without compromising their use properties.

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