Chip, method for manufacturing chip, and adhesive composition
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Solution Overview
Problem
Conventional chloroprene-based polymer rubbers suffer from blocking during high-temperature storage, slow dissolution in organic solvents, poor brushability, and layer separation resistance, along with coloration issues, making it difficult to achieve a balanced set of properties in adhesive compositions.
Innovation Solution
Controlled production conditions to manage heat storage and crystallization time, using a coagulant to separate chloroprene-based polymer latex, and molding the chips under specific temperature constraints to produce a chip with improved blocking resistance, rapid solvent dissolution, and enhanced brushability and layer separation resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional chloroprene-based polymer rubber is stored under pressure in high-temperature environment, then adhesive strength is maintained, but blocking occurs and handling deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the heat storage temperature (keeping it below 130°C after 60 seconds at room temperature) and adjusting the crystallization time (keeping it below 500 minutes). These parameter optimizations resolve the contradiction by preventing blocking while maintaining adhesive strength, thereby improving handling characteristics without sacrificing adhesive performance.
2Reliability
If conventional chloroprene-based polymer rubber is used, then adhesive properties are achieved, but dissolution time in organic solvent is excessive
Solution Approach 1:
The patent optimizes dissolution time by controlling the crystallization time parameter to be less than 500 minutes. This parameter change enables the polymer rubber to dissolve in organic solvents within an acceptable time frame while maintaining reliable adhesive properties, thus resolving the contradiction between adhesive reliability and dissolution time.
3Reliability
If conventional chloroprene-based polymer rubber is used, then adhesive composition is obtained, but brushability and layer separation resistance are insufficient
Solution Approach 1:
The patent improves brushability and layer separation resistance by optimizing the heat storage temperature parameter (keeping it below 130°C after 60 seconds at room temperature). This parameter control prevents excessive crystallization that would harm brushability, while maintaining the adhesive composition's reliability and preventing layer separation.
4Reliability
If conventional chloroprene-based polymer rubber is used, then adhesive composition is obtained, but coloration occurs
Solution Approach 1:
The patent reduces coloration by controlling the heat storage temperature parameter to remain below 130°C after 60 seconds at room temperature. This temperature parameter optimization prevents thermal degradation and oxidation that cause coloration, while maintaining the reliability and performance of the adhesive composition.
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 adhesive composition exhibits excellent brushability, layer separation resistance, and minimal coloration, with rapid dissolution in organic solvents, while maintaining effective adhesive properties.
Implementation Method 1
by adding a coagulant to a chloroprene-based polymer latex containing the chloroprene-based polymer rubber, the chloroprene-based polymer rubber is separated from the chloroprene-based polymer latex
Implementation Method 2
time required for A X to exceed A 0 + 20 is less than 500 minutes; A 0 is a Type A durometer hardness measured in accordance with JIS K 6253-3 of a 6 mm thickness sheet, prepared by press molding the chip at 70°C, taken out from a mold and allowed to stand for 1 hour in a 23°C environment
Data Source
Figure 1
AI summary
The chip, which has excellent blocking resistance and dissolves in an organic solvent in a short time, is provided. By the chip also an adhesive composition with excellent brushability and layer separation resistance and little coloration can be obtained. A method for producing the chip, and an adhesive composition that has excellent brushability and layer separation resistance, and little coloring. are also provided. According to the present invention, a chip for an adhesive composition, comprising a chloroprene-based polymer rubber, wherein: a temperature near a center of the chip 60 seconds after the chip heated to 140°C is kept in a room at 23°C is less than 130°C; time required for Ax to exceed A0 + 20 is less than 500 minutes; A0 is a Type A durometer hardness measured in accordance with JIS K 6253-3 of a 6 mm thickness sheet, prepared by press molding the chip at 70°C, taken out from a mold and allowed to stand for 1 hour in a 23°C environment; AX is a Type A durometer hardness after X minutes of placing the 6 mm thick sheet in a thermostatic chamber at -10°C, is provided.