Aqueous Surface-Treating Agent for Rubber Seal Anti-Sticking
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Solution Overview
Problem
Existing rubber seal materials face issues with sticking to themselves or other surfaces during assembly, leading to friction and assembly challenges, and previous solutions either cause environmental concerns or result in inadequate durability and adhesion.
Innovation Solution
An aqueous surface-treating agent comprising a silicone oil emulsion, a polyurethane resin emulsion, and a silane compound, with a high polyurethane resin content to ensure adhesion and durability, and a silanol-modified polyurethane resin for improved solvent resistance and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid material such as wax or grease is applied to seal materials to prevent sticking, then the assembling work is improved, but the liquid material deposits onto surroundings and causes blocking
Solution Approach 1:
The patent changes the physical state of the treating agent from liquid to fine powder form, and controls particle size within specific ranges (0.1-10 μm for graphite, 0.1-5 μm for silica). This parameter change allows the material to prevent sticking without the deposition problems associated with liquid materials, while the fine particle size ensures smooth application and reduced environmental contamination.
Solution Approach 2:
The patent uses inorganic powder coatings (graphite, silica, talc) that form a thin protective layer on the seal material surface. This coating is applied in small amounts and provides immediate anti-sticking protection during assembly, eliminating the need for large quantities of liquid material that would otherwise deposit on surroundings.
2Object-generated harmful factors
If inorganic powders such as graphite or silica are sprayed to prevent sticking, then blocking is prevented, but surrounding pollution due to disengagement of deposited powders occurs
Solution Approach 1:
The patent specifies precise particle size parameters for the inorganic powders (0.1-10 μm for graphite, 0.1-5 μm for silica) and controls the coating amount to 0.01-5 mg/cm². These parameter controls ensure the powder forms a stable, adherent coating that prevents blocking while minimizing disengagement and subsequent pollution of the surrounding environment.
Solution Approach 2:
The patent creates a composite coating structure by combining inorganic powder particles (graphite, silica, or talc) with a binder resin. This composite approach enhances the adhesion of the powder to the rubber seal material, preventing particle disengagement and pollution while maintaining the anti-sticking properties.
3Force
If liquid material is applied to reduce friction during sliding motion, then the friction coefficient decreases, but the liquid material comes off due to liquid nature and retainability is insufficient
Solution Approach 1:
The patent applies a thin layer of inorganic powder coating (0.01-5 mg/cm²) that provides immediate and durable low-friction properties. The fine powder particles create a stable surface layer that resists removal during sliding motion, offering long-lasting retainability without the runoff problems of liquid lubricants.
Solution Approach 2:
The patent forms a composite coating combining inorganic powder (graphite, silica, or talc) with a binder resin. This composite structure provides excellent adhesion to the rubber surface and maintains low friction during sliding, with the binder holding the powder particles firmly in place to prevent premature removal.
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 solution effectively prevents sticking and reduces friction between rubber seal materials, providing a durable and environmentally friendly coating with improved solvent resistance and adhesion without bleeding of oily matters.
Implementation Method 1
a silane compound having at least one of epoxy group and methacryloxypropyl group at the molecular chain terminal, and/or a partial hydrolyzate thereof
Implementation Method 2
a partial hydrolyzate thereof
Implementation Method 3
reducing friction of rubber or resin seal members at the time of sliding motion
Implementation Method 4
a reaction product of polysiloxane having a terminal hydroxyl group, with silyl isocyanate
Data Source
AI summary
An aqueous surface-treating agent, which comprises a silicone oil aqueous emulsion, a polyurethane resin aqueous emulsion, and a silane compound represented by the following general formula: (B) CH2=C(CH3)COO(CH2)3Si(OR1)nR2m (C) CH2=CHCOO(CH2)3Si(OR1)nR2m (D) H2N(CH2)3Si(OR1)nR2m, or (E) H2NC2H4NH(CH2)3Si(OR1)nR2m (where R1 and R2 each are an alkyl group having 1 to 4 carbon atoms, and n and m are 1≦n≦3 and m=3-n, respectively), and/or a hydrolyzate thereof, wherein 100 parts by weight or more of the polyurethane resin in terms of the weight of solid matters is used on the basis of 100 parts by weight in terms of nonvolatile matters of silicone oil, can prevent sticking of rubber seal materials such as O rings, etc. themselves or sticking to a metal, a resin, etc., and can reduce the friction of rubber or resin seal members at the time of sliding motion.