Tackifier Resin for Low-Temperature Rubber Compounding
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Solution Overview
Problem
Tackifiers with high glass transition points require high compounding temperatures, leading to energy inefficiency and material exposure issues, while those with low glass transition points compromise tackiness and mechanical properties in rubber products.
Innovation Solution
A tackifier comprising resin units with specific alkylen and aliphatic hydrocarbon groups, combined with a non-aromatic compound, allowing for low-temperature compounding without compromising tackiness or mechanical properties, achieved by using a resin like Koresin® and a non-aromatic compound such as polyisobutenyl succinic anhydride.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a tackifier with high glass transition point is used, then high tackiness is achieved, but high compounding temperature is required leading to energy inefficiency and material exposure issues
Solution Approach 1:
The patent modifies the chemical structure of the resin by controlling the ratio of acetylene to phenolic compound (0.05-0.5 mol/mol) and adjusting reaction conditions to produce resins with specific glass transition points (40-110°C). This parameter optimization allows achieving adequate tackiness while enabling compounding at lower temperatures (80-150°C), thus resolving the contradiction between high tackiness and low processing temperature
Solution Approach 2:
The patent creates a composite tackifier system combining resin with controlled molecular weight distribution (Mw/Mn ratio of 1.5-5.0) and specific functional groups. The composite structure of the resin, containing both aromatic and aliphatic components in optimized ratios, provides both the necessary tackiness and reduced processing temperature requirements
2Temperature
If a tackifier with low glass transition point is used, then low compounding temperature is achieved, but tackiness and mechanical properties are compromised
Solution Approach 1:
The patent optimizes the glass transition point parameter to fall within the specific range of 40-110°C, avoiding both extremes. This controlled parameter adjustment ensures the resin remains processable at low temperatures (80-150°C) while maintaining sufficient tackiness for rubber applications, effectively resolving the trade-off between processing temperature and performance
3Stability of the object's composition
If high compounding temperature is used, then homogeneous composition is achieved, but energy consumption increases and material degradation occurs
Solution Approach 1:
The patent changes the physical state parameter of the resin by controlling its glass transition point and melting point through molecular weight and composition optimization. The resin is designed to be processable in a molten state at relatively low temperatures (80-150°C), ensuring homogeneous mixing and dispersion in the rubber compound without requiring high energy input, thus achieving both homogeneity and energy efficiency
Data Source
AI summary
A tackifier comprising a resin with repeating units of formula (I) wherein R1 is a linear or branched alkylen group with 1 to 10 carbon atoms and R2 is a linear or branched, saturated or unsaturated aliphatic hydrocarbon group with up to 20 carbon atoms and a non-aromatic compound which consists to at least 50% by weight of one or more linear or branched, saturated or unsaturated aliphatic hydrocarbon groups with at least 4 carbon atoms.