Polymer Composition with Co-Oligomer for Surface Migration
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Solution Overview
Problem
Current polymer compositions face challenges in achieving effective surface migration of additives, leading to inefficient use and potential loss of properties due to overdose and incompatibility, particularly at polymer/air or polymer/metal interfaces, which affects barrier and mechanical properties.
Innovation Solution
A polymer composition comprising a polymer with at least 50% monomeric units derived from an ethylenically unsaturated monomer and a co-oligomer with specific monomeric units, including groups like —CaH2a+1, —(CH2)b—CcF2c+1, —(Si(CH3)2—O)e—Si(CH3)3, COOH, SO3H, and phosphonate groups, which facilitates selective migration and compatibility, allowing for improved surface adhesion and property enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If additives are distributed within the mass of the polymer composition, then effectiveness is improved for bulk properties, but additives are not present at the surface or interface where needed for surface phenomena
Solution Approach 1:
The patent applies local quality by creating a polymer composition with spatially varying properties: the co-oligomer component concentrates additives at the surface and interface regions while the bulk polymer maintains structural integrity. This localized concentration ensures additives are present where surface phenomena occur without compromising bulk properties.
Solution Approach 2:
The invention uses a composite material system combining a polymer matrix with a specific co-oligomer component that has affinity for both the polymer and additives. This composite structure enables selective additive migration to surfaces while maintaining bulk composition stability, resolving the contradiction between uniform distribution and surface concentration.
2Reliability
If additives are introduced in greater amounts to ensure sufficient presence at the surface, then surface effectiveness is improved, but additional costs are incurred and other properties such as barrier and mechanical properties are negatively influenced
Solution Approach 1:
By concentrating additives locally at the surface and interface through the co-oligomer mechanism, the invention achieves sufficient surface effectiveness without requiring excessive additive amounts throughout the bulk material, thereby preserving mechanical properties and reducing costs.
Solution Approach 2:
The co-oligomer acts as an intermediary that facilitates additive migration to the surface. This mediator enables efficient additive delivery to surface regions without requiring high bulk additive concentrations, thus maintaining mechanical integrity while achieving surface effectiveness.
3Reliability
If incompatible additives are used to obtain migration towards the surface or interface, then selective migration is achieved, but additives are rapidly washed from the surface resulting in loss of effectiveness
Solution Approach 1:
The co-oligomer serves as an intermediary that enables selective migration while providing anchoring at the surface. This mediator mechanism allows additives to migrate to the surface through compatibility gradients while the co-oligomer's surface presence prevents rapid washing away, ensuring long-term effectiveness.
Solution Approach 2:
The composite structure of polymer plus co-oligomer creates a stabilized surface layer that retains migrated additives. The co-oligomer component forms a matrix at the surface that holds additives in place, preventing rapid washing while maintaining selective migration capability.
4Device complexity
If a single layer composition is used instead of three separate layers for adhesion, properties, and finishing, then process complexity is reduced, but achieving all functions in one layer is challenging
Solution Approach 1:
The polymer composition achieves multi-functionality by incorporating the co-oligomer component that simultaneously provides adhesion promotion, additive migration capability, and surface property enhancement. This single composition performs multiple functions that traditionally required separate layers.
Solution Approach 2:
The invention merges the functions of multiple coating layers into a single layer by combining polymer, co-oligomer, and additives in one composition. The co-oligomer enables this consolidation by providing both adhesion and surface activity, eliminating the need for separate primer and finishing layers.
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 polymer composition enables targeted migration of additives to surfaces, enhancing adhesion, barrier properties, and surface protection without the need for primers or adhesives, while maintaining mechanical integrity and reducing material costs.
Implementation Method 1
additives capable of migrating preferentially to where they are useful (polymer/air surface, polymer/metal interface, polymer 1/polymer 2 interface, etc.)
Data Source
AI summary
Polymer composition comprising: 1) a polymer (P1) comprising at least 50% by weight of monomeric units derived from an ethylenically unsaturated monomer (M1), and 2) at least one co-oligomer (O1) comprising at least: a) a component (A) comprising at least one monomeric unit identical to that derived from the monomer (M1) on which the polymer (P1) is based, and b) a component (B) comprising at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one group chosen from the following groups: —CaH2a+1 with a between 6 and 30; —(CH2)b—CcF2c+1 with b between 1 and 11 and c greater than or equal to 5; —(CH2)d—(Si(CH3)2—O)e—Si(CH3)3 with d between 1 and 11 and e between 1 and 1000; —COOH; —SO3H, and the phosphonate groups —PO(OH)(OR1) with R1 being a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms.