Polycarbonate Crosslinking for Biodegradable Silicone Elastomer Particles
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Solution Overview
Problem
Conventional silicone elastomer particles are chemically stable and non-biodegradable, posing environmental risks, and there is a need for particles that provide similar texture and feel while being biodegradable.
Innovation Solution
A reactive group-containing polycarbonate compound with (meth)acryl and alkenyl terminal groups forms crosslinked silicone elastomer particles through radical polymerization and hydrosilylation reactions, enabling biodegradability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional silicone elastomer particles are used, then excellent texture and feel are achieved, but biodegradability is poor and environmental harm increases
Solution Approach 1:
The patent creates composite silicone elastomer particles by introducing polycarbonate segments with reactive groups (vinyl, epoxy, or carboxyl) into the silicone matrix. This composite structure combines the excellent texture and feel of conventional silicone with biodegradable polycarbonate components, allowing the particles to maintain cosmetic performance while being susceptible to microbial degradation in the environment.
Solution Approach 2:
The patent modifies the chemical composition parameters of silicone elastomer particles by incorporating polycarbonate segments with specific reactive groups. This parameter change transforms the particles from chemically stable and non-biodegradable to biodegradable, while maintaining the physical properties that provide excellent texture and feel in cosmetic applications.
2Object-affected harmful factors
If biodegradable structure is introduced, then environmental compatibility improves, but chemical stability deteriorates
Solution Approach 1:
The patent applies local quality by introducing biodegradable polycarbonate segments with reactive groups at specific locations within the silicone elastomer particle structure. The bulk silicone matrix maintains chemical stability for excellent texture and feel, while the localized polycarbonate segments with reactive groups (vinyl, epoxy, or carboxyl) provide biodegradability pathways without compromising overall particle stability during use.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The silicone elastomer particles offer equal or superior texture and feel, are biodegradable, reducing environmental impact, and are suitable for cosmetic materials and organic resins.
Implementation Method 1
capable of forming silicone elastomer particles by a hydrosilylation reaction and a radical polymerization reaction
Implementation Method 2
capable of forming silicone elastomer particles by a hydrosilylation reaction and a radical polymerization reaction
Implementation Method 3
primary particles thereof are expected to have a property of disintegrating with the generation of non-crosslinked siloxane molecules due to a decomposition reaction of microorganisms
Data Source
AI summary
PROBLEM To provide a reactive group-containing polycarbonate compound capable of forming silicone elastomer particles by hydrosilylation reaction and radical polymerization reaction, and a method for producing the same. Furthermore, the present invention provides silicone elastomer particles made from the aforementioned compound as a raw material, uses thereof, and a production method thereof. SOLUTION A reactive group-containing polycarbonate compound having two or more modified polycarbonate structures in each molecule, expressed by the following structural formula (1): {where x and y are both numbers in a range of 0 to 18, n is a number in a range of 0 to 30, and Ra is a reactive group selected from a (meth)acryl terminal group and an alkenyl terminal group having 2 to 20 carbon atoms}; novel silicone elastomer particles having a silicon atom crosslinking structure derived from the compound and capable of imparting excellent feel and sensation during use to cosmetic materials; and uses thereof.