Hydrogenated Block Copolymer Molding Processability
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Solution Overview
Problem
Hydrogenated block copolymers with improved molding processability are needed to enhance their properties for applications such as automotive parts and industrial sundries, as existing hydrogenated block copolymers have limitations in this regard.
Innovation Solution
A hydrogenated block copolymer composed of polymer blocks derived from an aromatic vinyl compound, farnesene, and a conjugated diene, with specific hydrogenation rates and structural configurations, is developed, along with a method for producing and incorporating these blocks into compositions for improved molding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional hydrogenated block copolymers are used, then rubber elasticity and weather resistance are achieved, but molding processability remains insufficient
Solution Approach 1:
The patent changes the chemical composition parameters by introducing farnesene-derived structural units (0.1-10 mol%) into the conjugated diene block, which modifies the polymer's physical properties to improve molding processability while preserving rubber elasticity through controlled compositional adjustment
Solution Approach 2:
The patent creates a composite block copolymer structure combining aromatic vinyl compound blocks (providing structural integrity), conjugated diene blocks (providing elastomeric properties), and farnesene-derived units (enhancing processability), where the synergistic interaction of different blocks achieves both improved manufacturing and maintained mechanical properties
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 resulting hydrogenated block copolymer exhibits enhanced molding processability, leading to the creation of high-quality molded articles, laminates, films, fibers, nonwoven fabrics, adhesives, and elastic members with improved mechanical properties and weather resistance.
Implementation Method 1
a hydrogenated block copolymer prepared by hydrogenating a block copolymer that contains a polymer block (A) containing a structural unit derived from an aromatic vinyl compound, a polymer block (B) containing a structural unit derived from farnesene, and a polymer block (C) containing a structural unit derived from a conjugated diene except farnesene
Data Source
AI summary
A hydrogenated block copolymer prepared by hydrogenating a block copolymer that contains a polymer block (A) containing a structural unit derived from an aromatic vinyl compound, a polymer block (B) containing a structural unit derived from farnesene, and a polymer block (C) containing a structural unit derived from a conjugated diene except farnesene, wherein the block copolymer contains at least two above polymer blocks (A), at least one above polymer block (B) and at least one above polymer block (C), and wherein at least one above polymer block (B) is at the terminal, and the hydrogenation rate of the carbon-carbon double bond in the polymer block (B) and the polymer block (C) is 50 mol% or more.