WO2016065272A1

WO2016065272A1 - Adhesive and wood and metal protecting compositions

Info

Publication number: WO2016065272A1
Application number: PCT/US2015/057135
Authority: WO
Inventors: Jagannath Bhaskaran NAIR
Original assignee: Jar Cellulose & Coatings Corporation
Priority date: 2014-10-23
Filing date: 2015-10-23
Publication date: 2016-04-28

Abstract

Provided herein are biodegradable anticorrosive compositions that convert rust and protect metal surfaces, compositions that protect wood, and adhesive compositions that adhere to a multitude of surfaces with strong adhesion.

Description

ADHESIVE AND WOOD AND METAL PROTECTING COMPOSITIONS [Technical Field]

The present subject matter generally relates to anticorrosive compositions for protecting metal surfaces from rusting, compositions for protecting wood from biodegradation, and adhesive compositions that adhere to a multitude of surfaces. [Background]

Iron in the presence of air and moisture undergoes rusting. This process of rusting occurs in stages wherein iron is converted to iron lower hydroxide, iron higher hydroxide, iron lower oxide, and finally iron higher oxide. The final stage of iron oxide is often called rust and may also be referred to as ferric oxide. Depending on the level of exposure, the surface of iron will undergo rusting at different degrees, which is commonly referred to as degree of rusting on the surface of iron.

Various formulations exist that attempt to provide barrier coatings for metal surfaces to protect those metal surfaces from corrosion and rust. Some formulations have included compounds called "rust converters" which are primarily based on well-known acids, such as tannic acid or phosphoric acid. However, these compounds are susceptible to leaching, which often results in the loss of protection to the surface that is coated. The formulations currently used to protect metal surfaces from rust and corrosion also present severe environmental and safety problems associated with their use.

Historically, solvent-based coating systems have been used on moving watercrafts and static underwater structures to protect such structures from the effects of biodegradation. However, as environmental awareness continues to increase, there is a strong desire to develop water-based coating systems to protect these watercrafts and underwater structures while reducing the negative impact of solvents on the environment. Moreover, given the diversity of materials that are used to construct watercrafts and static underwater structures, such as wood and metals, there is a strong need to develop green compositions that can be applied to a multitude of surfaces.

Water-based coatings, in particular, having been gaining popularity due to the increasing demands to regulate the amount of solvents (volatile organic compounds "VOC") that are released into the atmosphere during application as well as their low cost to manufacture. Accordingly, the reduction or elimination of solvents is essential to developing environmentally friendly coatings.

Therefore, there is a need to provide inexpensive adhesive with rust inhibiting and corrosion resistant compositions that are safe and easy to apply on a multitude of surfaces and is also environmentally friendly. [Summary]

The following presents a simplified summary in order to provide a basic understanding of some aspects of the claimed subject matter. This summary is not an extensive overview, and is not intended to identify key/critical elements or to delineate the scope of the claimed subject matter. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

In a non-limiting exemplary embodiment, a rust inhibiting and corrosion resistant composition includes hydrated aluminum oxide, silicon dioxide, a synthetic copolymer, citric acid, saturated natural oils, polypropylene glycol, thiosulfinates, and natural antioxidants. In another non-limiting exemplary embodiment, an adhesive composition useful for application to wood, sunmica laminates, and wood veneer includes styrene butadiene, a synthetic copolymer, saturated natural oils, and hydrated aluminum oxide.

A third non-limiting exemplary embodiment of a biodegradation protective composition useful for application with watercrafts and structures in proximity to or contact with water, which are formed at least in part from wood includes silicon dioxide, hydrated aluminum oxide, anacardic acid, a synthetic copolymer, natural bioxides, and natural antioxidants.

Further, a non-limiting exemplary embodiment of a rust inhibiting and protecting composition application method includes preparing a surface by removing flaky and loose rust, removing any grease or oil from the surface with a detergent wash and a second water wash, and applying an amount of the composition to the prepared surface. [Detailed Description]

In one embodiment, a high performance rust inhibiting and corrosion resistant composition includes a mixture of polymers, natural ingredients, and a water base, which is useful for the conversion of rust and protection thereafter of metal surfaces to which the composition is applied. More specifically, the composition may include hydrated aluminum oxide, silicon dioxide, synthetic copolymer, citric acid, saturated natural oils, polypropylene glycol, thiosulfinates, and natural antioxidants. The composition provides excellent adhesion strength and can be directly applied to any surface. Further, the composition protects and converts existing rust to provide a longer, more effective protective coating.

In a non-limiting example, the composition may include about 50-70 wt% of hydrated aluminum oxide and silicon dioxide, about 10-30 wt% or less of synthetic copolymer, about 2- 10 wt% of citric acid, about 5-15 wt% of polypropylene glycol, and about 2-10 wt% or less of each of saturated natural oils, thiosulfinates, and natural antioxidants. The synthetic copolymer is a water-based, nontoxic, biodegradable, rubber-based synthetic copolymer. In some embodiments, the composition may include tulsi leaves as a natural antioxidant.

In another non-limiting example, the composition may include about 60 wt% of hydrated aluminum oxide and silicon dioxide, about 20 wt% or less of synthetic copolymer, about 5 wt% of citric acid, about 10 wt% of polypropylene glycol, and about 5 wt% or less of each of saturated natural oils, thiosulfinates, and natural antioxidants. The composition is neither flammable nor combustible. Additionally, the composition is of a liquid state having a light blue/pale grey color. In an exemplary embodiment, the composition comprises an elastomeric synthetic copolymer with cross linking compounds to from a film which is impermeable to air and moisture, thus converts and protects a surface.

Some advantages of the rust inhibiting and corrosion resistant composition include increased life of the coated surface to more than double the life of the uncoated surface, restricted water absorption, fast curing, antifungal, antimicrobial, and anti-parasitic properties, greater coverage, zero waste, zero toxicity, zero VOCs, and odorlessness. Through the use of nano-technology, the rust inhibiting and corrosion resistant composition is specially designed to penetrate deep into the multitude of materials, including but not limited to wood, metal, and other fibers, to which it is applied.

In a non-limiting exemplary application method, a wire brush is used to remove loose and flaky rust from a desired metal surface. In normal circumstances, if the removal step is carried out effectively, the iron oxides will be removed from the metal surface. However, it is of particular importance for the present subject matter that some the iron hydroxides remain on the surface to facilitate a chemical reaction with the rust inhibiting and corrosion resistant composition in order to effectuate excellent bonding. The remaining rust is converted to an organo metallic complex and is passivated. Any grease and oil should also be removed from the metal surface prior to application of the composition because grease and/or oil interfere with adhesion between the surface and the composition. Once the surface is prepared, a portion of the composition is transferred to a non-metallic container to then be applied to the prepared surface. After the composition cures, it forms an insulated water impermeable layer on the applied surface. The composition can serve as an undercoat or overcoat on a plurality of surfaces. In some embodiments, the composition is applied to a surface to form a 25 micron thick layer on the applied surface.

In another embodiment, an adhesive composition including a mixture of polymers and natural ingredients is useful for applications involving but not limited to wood, sunmica laminates, and wood veneer. More specifically, the adhesive may include styrene butadiene, synthetic copolymer, saturated natural oils, and hydrated aluminum oxide.

In a non-limiting example, the adhesive may include about 60-80 wt% or more of styrene butadiene and a synthetic copolymer, about 2-10 wt% of saturated natural oils, and about 20-30 wt% or less of hydrated aluminum oxide. In another non-limiting example, the adhesive may include about 70 wt% or more of styrene butadiene and a synthetic copolymer, about 5 wt% of saturated natural oils, and about 25 wt% or less of hydrated aluminum oxide. In one embodiment, the adhesive composition is made at room temperature in a dust free environment.

The adhesive is neither flammable nor combustible. The adhesive is typically in liquid form, milky white in appearance, and forms a transparent flexible and elastic coating upon application. Some benefits of the novel adhesive include increased area coverage, zero toxicity, odorlessness, and fast drying. More specifically, the adhesive bonds wood, laminates and veneer within two and a half hours and bonded portions can be assembled for use after only three hours. Further, the application process is easy via cloth or brush and no pressing or nailing upon application to effectuate the adhesion.

In a third embodiment, there is provided a biodegradation protective composition. The composite formulation may include a mixture of polymers, natural ingredients, and a water base. More specifically, the composite formulation may include silicon dioxide, hydrated aluminum oxide, anacardic acid, synthetic copolymer, natural bioxides, and natural antioxidants. The composition has a neutral pH and therefore prevents degradation and allows the composition to maintain a longer shelf-life.

In a non-limiting example, the composition may include about 50-70 wt% of silicon dioxide and hydrated aluminum oxide, about 10-30 wt% or less of thiosulfinate, about 5-15 wt% of natural bioxides, and about 2-10 wt% or less of each of anacardic acid, synthetic copolymer, and natural antioxidants. In another non-limiting example, the composition may include about 60 wt% of silicon dioxide and hydrated aluminum oxide, about 20 wt% or less of thiosulfinate, about 10 wt% of natural bioxides, and about 5 wt% or less of each of anacardic acid, synthetic copolymer, and natural antioxidants. This formulation is neither flammable nor combustible. Additionally, the physical state of the composite formulation is liquid and it is milky white in appearance. In one embodiment, the natural bioxides are selected from neem extract and cashew shell extract, or a combination thereof. It is also contemplated that the composition can be provided as a paste which can be added to water to from the composition.

The exemplary protective composition is particularly advantageous in protecting wood from biodegradation to increase the life of the wood by more than double. Other benefits include, but are not limited to, restricted water absorption, fast curing, antifungal, antimicrobial, and anti-parasitic properties, greater coverage, zero waste, zero toxicity, zero VOCs, and odorlessness. By using nano-technology, the wood protective composition is specially designed to penetrate deep into the wood or fiber to which it is applied to effectuate enhanced protection against biodegradation. Table 1 below provides some exemplary characteristics of the composition according to at least one embodiment.

Ta ble 1

While certa in exempla ry embodim ents and im plementati ons have b een describ ed herein, other emb odiments an d modific ations will be apparen t from thi s descriptio n. Accordi ngly, the va rious embo diments des cribed are n ot intended to be limit ing, but rath er are enc ompassed by the bro ader scope of the pre sented clai ms and va rious obvio us modific ations and e quivalent ar rangements.

Claims

1. A biodegradable anticorrosive composition comprising:

50-70 wt% of hydrated aluminum oxide and silicon dioxide;

10-30 wt% or less of synthetic copolymer;

2-10 wt% of citric acid;

5-15 wt% of polypropylene glycol, and

2-10 wt% or less of each of saturated natural oils, thiosulfinates, and natural antioxidants. 2. The biodegradable anticorrosive composition of claim 1, wherein the composition is neither flammable nor combustible.

3. The biodegradable anticorrosive composition of claim 1, wherein the synthetic

copolymer is a water-based, nontoxic, biodegradable, rubber-based synthetic copolymer.

4. The biodegradable anticorrosive composition of claim 1, wherein the composition has a neutral pH.

5. The biodegradable anticorrosive composition of claim 1, wherein the anticorrosive composition forms an aqueous emulsion.

6. The biodegradable anticorrosive composition of claim 1, comprising:

60 wt% of the hydrated aluminum oxide and the silicon dioxide;

20 wt% or less of the synthetic copolymer;

5 wt% of the citric acid;

10 wt% of the polypropylene glycol; and

5 wt% or less of each of the saturated natural oils, the thiosulfinates, and the natural antioxidant.

7. An adhesive composition comprising hydrated aluminum oxide, a synthetic copolymer, saturated natural oils, and styrene butadiene.

8. The adhesive composition of claim 7, wherein the adhesive composition comprises:

60-80 wt% or more of the styrene butadiene and the synthetic copolymer;

2-10 wt% of the saturated natural oils; and

20-30 wt% or less of the hydrated aluminum oxide.

9. The adhesive composition of claim 8, wherein the adhesive composition comprises:

70 wt% or more of the styrene butadiene and the synthetic copolymer;

5 wt% of the saturated natural oils; and

25 wt% or less of the hydrated aluminum oxide.

10. The adhesive composition of claim 7, wherein the adhesive composition is neither flammable nor combustible.

11. The adhesive composition of claim 7, wherein the adhesive composition forms a transparent coating.

12. A protective composition comprising:

silicon dioxide, hydrated aluminum oxide, thiosulfinate, anacardic acid, a synthetic copolymer, natural bioxides, and antioxidants.

13. The protective composition of claim 12, comprising:

50-70 wt% of silicon dioxide and hydrated aluminum oxide;

10-30 wt% or less of thiosulfinate;

5-15 wt% of natural bioxides; and

2-10 wt% or less of each of anacardic acid, synthetic copolymer, and natural antioxidants.

14. The protective composition of claim 13, comprising:

60 wt% of silicon dioxide and hydrated aluminum oxide;

20 wt% or less of thiosulfinate;

10 wt% of natural bioxides; and

5 wt% or less of each of anacardic acid, synthetic copolymer, and natural antioxidants.

15. The protective composition of claim 12, wherein the protective composition is neither flammable nor combustible.

16. The protective composition of claim 12, wherein the protective composition forms an aqueous emulsion.

17. The protective composition of claim 12, wherein the natural bioxides are selected from a group consisting of neem extract, cashew shell extract, and combinations thereof.

18. A method for reducing corrosion and inhibiting rust, comprising:

preparing a surface by removing flaky and loose rust;

removing grease or oil from the surface with a detergent wash;

performing a second water wash on the surface; and

applying an effective amount of a composition to the prepared surface;

wherein the composition comprises:

50-70 wt% of hydrated aluminum oxide and silicon dioxide;

10-30 wt% or less of synthetic copolymer;

2-10 wt% of citric acid;

5-15 wt% of polypropylene glycol, and

2-10 wt% or less of each of saturated natural oils, thiosulfinates, and natural antioxidants.

19. The method of claim 18, wherein iron oxides remain on the surface during the

preparing step.

20. The method of claim19, wherein the iron oxides that remain on the surface are converted into a film upon application of the composition.

21. The method of claim 19, wherein an effective amount of the composition forms a layer about 25 microns thick.