Halogen-Terminated Sulfur Polymer Plasticizer for Polysulfide Compatibility

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional polysulfide polymers face limitations due to high polarity, restricting the use of plasticizers like phthalate esters and chlorinated paraffins, which are hazardous and subject to regulatory restrictions, necessitating the development of a new plasticizer with high compatibility and improved low-temperature flexibility.

Innovation Solution

A halogen-terminated sulfur-containing polymer, represented by the formula X-(R-Sr)n-R-X, where R is an ether bond-containing alkyl group, X is a halogen atom, and n is an integer of 1 to 200, offering high compatibility and plasticizing effects, and can be used as a plasticizer for polysulfide polymers and other high-polar resins.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional plasticizers such as phthalate esters and chlorinated paraffins are used for polysulfide polymers, then plasticizing effects are achieved, but safety hazards and regulatory restrictions occur

Engineering Contradiction:

Improveplasticizing effectVSAvoidsafety hazard

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces hazardous conventional plasticizers with a newly developed halogen-terminated polymer plasticizer that is safe and environmentally friendly. This new plasticizer achieves the same plasticizing effect without the safety hazards and regulatory restrictions associated with phthalate esters and chlorinated paraffins, effectively substituting a harmful material with a benign alternative

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention creates a composite plasticizer system by combining the halogen-terminated polymer with polysulfide polymer, where the unique molecular structure (containing both halogen terminals and polysulfide bonds) enables both plasticizing function and compatibility with the base polymer, while maintaining safety and environmental friendliness

Inventive Principle:

Principle #40Composite materials

2Reliability

If high polarity polysulfide polymer is used, then excellent adhesion and chemical resistance are achieved, but compatibility with plasticizers is limited

Engineering Contradiction:

Improveadhesion and chemical resistanceVSAvoidplasticizer compatibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the chemical structure parameters of the plasticizer to match the high polarity characteristics of polysulfide polymers. The halogen-terminated polymer contains polar groups that are compatible with the high polarity of polysulfide polymers, enabling effective mixing and plasticizing while maintaining the excellent adhesion and chemical resistance properties of the base polymer

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention achieves homogeneity between the plasticizer and polysulfide polymer by designing the halogen-terminated polymer with chemical structure characteristics that match the base polymer. This structural similarity ensures compatible mixing and uniform distribution, maintaining the reliability of adhesion and chemical resistance while enabling plasticizing effects

Inventive Principle:

Principle #33Homogeneity

3Force

If conventional plasticizers are used to reduce viscosity, then fluidity is improved, but low-temperature flexibility deteriorates due to high glass-transition temperature

Engineering Contradiction:

Improveviscosity reductionVSAvoidglass-transition temperature

Core Design Contradiction:

ForceVSTemperature

Solution Approach 1:

The patent changes the molecular structure parameters of the plasticizer to achieve both viscosity reduction and low glass-transition temperature. The halogen-terminated polymer has a molecular structure that interferes with polymer chain packing and reduces intermolecular forces, thereby lowering the glass-transition temperature and improving low-temperature flexibility while effectively reducing viscosity

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2738160B1Halogen-terminated sulfur-containing polymer

Publication Date: 2018.02.14 TORAY FINE CHEMICALS CO LTD

AI summary

The halogen-terminated sulfur-containing polymer of the present invention is a halogen-terminated sulfur-containing polymer represented by the following formula: X-(R-Sr)n-R-X wherein R is an ether bond-containing alkyl group having 3 to 26 carbon atoms, X is a halogen atom, n is an integer of 1 to 200, and r has an average of 1 to 5. The halogen-terminated sulfur-containing polymer of the present invention is industrially very useful as a plasticizer of a polysulfide polymer. In addition, the halogen-terminated sulfur-containing polymer of the present invention can be used as a plasticizer for thioether polymers and high polar resins such as vinyl chloride, and an additive for materials that require a high refractive index such as an optical fiber. The halogen-terminated sulfur-containing polymer of the present invention is effective as an intermediate of a thiol group-terminated polysulfide polymer and the like.