Grease · Patent
CV-Joint Grease Internals: Calcite, Borate and Organic Molybdenum
US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease. That is a move away from 3–5% MoS2 black grease toward inherent EP plus soluble Mo. Colour, noise and…
Direct answer
US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease. That is a move away from 3–5% MoS2 black grease toward inherent EP plus soluble Mo. Colour, noise and wear each change. The patent is prior art; the selection logic is the post.
- US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease.
- US 2025/0059458 names calcite, calcium borate and organic Mo in a PU/CaSX CVJ context. Extract the problem (fretting, high load, polymer boots). Do not paste the example treat rates onto a lithium EP2.
- Name the test method on any number that reaches a TDS.
- Patents and papers are prior art, not a product Lubechem sells.
- Written for Automotive grease formulators replacing MoS2-black CVJ.
MoS2 solids vs organic Mo vs borate vs calcite
MoS2 solids vs organic Mo vs borate vs calcite. US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease. That is a move away from 3–5% MoS2 black grease toward inherent EP plus soluble Mo. Colour, noise and wear each change. The patent is prior art; the selection logic is the post.
US 2025/0059458 names calcite, calcium borate and organic Mo in a PU/CaSX CVJ context. Extract the problem (fretting, high load, polymer boots). Do not paste the example treat rates onto a lithium EP2.
Literature/prior art for this note: US 2025/0059458 A1 — calcite, Ca borate, organic Mo in PU/CaSX CVJ grease. Read it as evidence under its own method, not as a formula you can paste onto an Indian CoA.
The reader is Automotive grease formulators replacing MoS2-black CVJ. Search phrases around “CV joint grease molybdenum” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
Why CVJ still likes some solid film
Why CVJ still likes some solid film. US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease. That is a move away from 3–5% MoS2 black grease toward inherent EP plus soluble Mo. Colour, noise and wear each change. The patent is prior art; the selection logic is the post.
US 2025/0059458 names calcite, calcium borate and organic Mo in a PU/CaSX CVJ context. Extract the problem (fretting, high load, polymer boots). Do not paste the example treat rates onto a lithium EP2.
The reader is Automotive grease formulators replacing MoS2-black CVJ. Search phrases around “CV joint grease molybdenum” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
Black vs ‘clean’ CVJ for OEM fill
Black vs ‘clean’ CVJ for OEM fill. US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease. That is a move away from 3–5% MoS2 black grease toward inherent EP plus soluble Mo. Colour, noise and wear each change. The patent is prior art; the selection logic is the post.
The reader is Automotive grease formulators replacing MoS2-black CVJ. Search phrases around “CV joint grease molybdenum” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
A trial matrix that does not copy the claim set
A trial matrix that does not copy the claim set. US 2025/0059458 puts colloidally dispersed calcite, calcium borate and an organic molybdenum compound inside a polyurea/CaSX CVJ grease. That is a move away from 3–5% MoS2 black grease toward inherent EP plus soluble Mo. Colour, noise and wear each change. The patent is prior art; the selection logic is the post.
The reader is Automotive grease formulators replacing MoS2-black CVJ. Search phrases around “CV joint grease molybdenum” should land on a decision: duty, method, purge, SKU sequence — then a link to the manufacturing page, not a second SOP.
Lubechem will not invent a client list or a certificate. If the next step is a trial, send the duty brief. If the next step is legal clearance of a filing, that sits with a patent attorney.
What this page is for
Application deep-dive from a 2025 patent. Distinct from the hybrid-thickener article. Images are labelled conceptual illustrations. Patents and papers are cited so you can go read them.
How to use this filing as prior art — not as a recipe
| Question | What to extract | What not to do |
|---|---|---|
| What problem is claimed? | CV-Joint Grease Internals: Calcite, Borate and Organic Molybdenum | Do not treat the abstract as a proven plant SOP |
| Thickener / additive families named | CV joint grease molybdenum | Do not copy claim language into a TDS |
| Examples vs claims | Worked oils, solids, treat ranges in examples | Examples are not a licence |
| Design-around | Unclaimed process windows, other thickeners | FTO is legal advice; Lubechem does not issue it |
| Citation in this article | US 2025/0059458 A1 — calcite, Ca borate, organic Mo in PU/CaSX CVJ grease | Cite, do not reproduce claims |
People-first note: this is dated editorial for decision-making. It is not a scaled rewrite of the manufacturing pages, and it is not legal or certification advice.
Questions plants actually ask
Is CV joint grease molybdenum a drop-in for whatever we run today?
Almost never. Thickener family, base-oil viscosity, NLGI grade and additive response all have to be matched to the duty. A purge plan comes before a plant-wide switch. Compatibility charts are screens, not guarantees.
Can we put CV joint grease molybdenum on the TDS because a patent or paper mentioned it?
No. Patents are prior art. Papers are evidence under stated conditions. A TDS line has to be backed by a method you actually ran, on oil you actually stock, at a treat you can buy twice.
Who owns the formula if Lubechem develops it?
Ownership is the contract. The practice is independent formulation with IP transfer as scoped — not a branded additive package you can never leave. Ask for the assignment language before the first kettle.
What should Automotive grease formulators replacing MoS2-black CVJ send in the first brief?
Duty (load, speed, water, temperature, relube), the current TDS and fail mode, target specs (IS / ASTM / OEM), and whether the product is sold, used in-house, or exported. Photographs of the failed component help more than adjectives.
Literature and prior art
Citations below are orientation, not a freedom-to-operate opinion. Lubechem does not copy claimed compositions and does not treat a patent as a product endorsement.
- US 2025/0059458 A1 — calcite, Ca borate, organic Mo in PU/CaSX CVJ grease — cited as prior art or literature, not as a product Lubechem sells
- ASTM D217 cone penetration / NLGI grade — consistency, not chemistry
- ASTM D2265 dropping point — lab fluidity, not continuous service limit
- ASTM D1264 water washout — wet service screen, not a seawater proof
- DIN 51821 FE9 / ASTM D3336 — bearing life nearer to operating reality than drop point