KR101250226B1 - Quickly Hardening Poly Urea Urethane Composition for Pipe Lining - Google Patents

Abstract

The present invention relates to a fast curing polyureaurethane composition, and more particularly, to a polyisocyanate or a prepolymer in which isocyanate is reacted with amines or polyols, and includes a polyamine combination and an OH-functional group. A fast curing polyureaurethane composition comprising a combination of materials as a curing agent. When the composition of the present invention is used as a coating for rehabilitation of an old pipe, it is excellent in wet surface workability of the old pipe, defects due to vibration, solubility in drinking water, construction of a thin thickness, and the like.

Description

Quickly Hardening Poly Urea Urethane Composition for Pipe Lining}

The present invention relates to a fast curing polyureaurethane composition for rehabilitation in the old pipe.

In the past, epoxy and enamel mortar materials have been used as fuse / construction coatings, and polyurea, polyurethane, and FBE have recently been used. However, these coatings are difficult to apply to regeneration of the old pipe.

Accordingly, the present inventors, while trying to develop a coating agent that can be used for rehabilitation of the old pipe, the polyisocyanate (Polyisocyanate) as the subject, and includes a combination of polyamine (Polyamine) and OH-functional material as a curing agent The present invention was completed by developing a fast-curable polyureaurethane composition, and confirming the superiority of wet surface workability, defects caused by vibration, suitability of drinking water, construction of thin thickness, and the like with these old tubes.

An object of the present invention is to provide a fast curing polyureaurethane composition for rehabilitation of the old pipe that can be installed on the wet surface of the old pipe, such as water purification pipe rehabilitation.

In order to achieve the above object, the present invention includes a polyisocyanate or a prepolymer in which isocyanate is reacted with amines or polyols. It provides a fast curing polyureaurethane composition comprising a.

Hereinafter, the present invention will be described in detail.

In the fast-curable polyureaurethane composition of the present invention, it is preferable to include 35 to 60 parts by weight of a curing agent and 1 to 6 parts by weight of other materials based on 100 parts by weight of the main polyisocyanate, wherein the polyisocyanate is TDI (Toluene diisocyanate). ), 4,4-Diphenylnethane diisocyanate (MDI), 1,5-Naphthalene diisocyanate (NDI), Xylene (Xylene diisocyanate) and PDI (P-phenylene diisocyanete). Is selected from the group consisting of 6-Hexamethylene diisocyanate, IPDI (Isophrone diisocyanate), H12MDI (Cyclohexylmethane diisocyanate), TMDI (Trimethylhexane-1.6-diisocyanate) and CHDI (1,4-Cyclohexane diisocyanate). Particularly preferred is Aliphatic Polyisocyanate, which is HDCO based NCO-Prepolymer and / or PPG Triol, Polyether-amine complex prepolymer.

In addition, in the fast-setting polyureaurethane composition of the present invention, the polyamine in the curing agent is DETA (Diethylene amine), TETA (Triethylene amine), DETDA (diethyltoluenediamine), DMDPA (Dimethyldipropylentriamine), DPTA (Dipropylenetriamine), CHAPA (Cyclohexylaminopropylamine) , Isophorondiamine (IPDA), TMPDA (n, n, n, n'-Tetramethyl-1-3-propanediamine), TMHDA (n, n, n, n'-Tetramethyl-1-6-hexanediamine), DMCHA (n, amines selected from the group consisting of n'-Dimethylcyclohexylamine, MOCA (4,4-Methylene bis (2-chloro aniline), DMEA (n, n'-Dimethylethylamine), DMIPA (n, n'-Dimethylisopropylamine) and Polyetheramine And, most preferably, DETDA The combination of OH-functional group materials is EG, DEG, DPG, 1.2PG, 1.3BG, 1.4BG, 1.6HD, NPG, MPD, Triethanolamine (TEA) and TMP Monomer OH selected from the group consisting of: Polyethylene Glycol (PEG), Polypropylene Polyol (PPG), Polytetramethylene Glycol (PTMG), Polycaprolactone Polyol (PCL) ) And a polyol selected from the group consisting of polycarbonate polyol (PC); and a polyester polyol consisting of adipic acid; and a material selected from the group consisting of: polylcaprolactone (PCL) polyol, PPG polyol and trimer of triol or tetraol. It is most preferable that it consists of.

In addition, in the fast-setting polyureaurethane composition of the present invention, it is preferable that at least one of the other materials is selected from the group consisting of a filler, a reaction stabilizer, a leveling agent, a catalyst, and an anti-aging agent.

Since the polyurea urethane (PUU) of the present invention has a gel time of 60 seconds before and after, the reaction rate is slower than that of a hybrid urea or urea system having a fast gel time within 20 seconds. In addition, the amount of OH-functional used is higher than that of the general hybrid urea system, and the elongation is slightly higher.

The composition of the PUU includes 90-100 parts by weight of polyisocyanate as the subject material, 35-50 parts by weight of the polyamine combination and 35-50 parts by weight of the OH-functional material combination and 1-5 parts by weight of the other material as the curing agent.

Polyisocyanete, which is the main material, may be used as isocyanate itself, but may be transformed into a propolymer by reacting with amines or OH, and at this time, may have a lot of Urea bonds or a structure with many Urethane bonds. The number of functional groups, NCO%, etc. can be modified in various ways to suit the desired purpose. There are a variety of commercialized Isocyanates and a variety of variant-Isocyanate products. NCO-prepolymer and commercialized Isocyanate may be mixed.

The types of isocyanate that can be used are aromatic compounds composed of toluene diisocyanate (TDI), 4,4-diphenylnethane diisocyanate (MDI), 1,5-Naphthalene diisocyanate (NDI), xylene diisocyanate (XDI) and P-phenylene diisocyanete (PPDI). (Aromatic Compound), HDI (1,6-Hexamethylene diisocyanate), IPDI (Isophrone diisocyanate), H12MDI (Cyclohexylmethane diisocyanate), TMDI (Trimethylhexane-1.6-diisocyanate) and CHDI (1,4-Cyclohexane diisocyanate) Aliphatic Compound).

Curing agent amines are Amine-functional materials other than DETA (Diethylene amine), TETA (Triethylene amine), and DETDA (diethyltoluenediamine). , n, n, n'-Tetramethyl-1-3-propanediamine), TMHDA (n, n, n, n'-Tetramethyl-1-6-hexanediamine), DMCHA (n, n'-Dimethylcyclohexylamine), MOCA (4 Amines such as, 4-Methylene bis (2-chloro aniline), DMEA (n, n'-Dimethylethylamine), DMIPA (n, n'-Dimethylisopropylamine), Polyetheramine and the like can be used.

As OH (Monomer), EG, DEG, DPG, 1.2PG, 1.3BG, 1.4BG, 1.6HD, NPG, MPD, TEA (Triethanolamine), TMP and the like can be used.

Among other OHs, polyester-based polyols are polyols made of monoglycols and acids (mainly Adipic Acid) .Other polyols include PEG (Polyethylene Glycol), PPG (Polypropylene Polyol), PTMG (Polytetramethylene Glycol), and PCL (Polycaprolactone). Polyol), polycarbonate polyol (PC), etc. can be used. Polyols can be made in a wide variety and commercially available polyol products are very diverse.

The higher the urethane composition is, the more remarkably slower the reactivity is, but depending on the polyol, polyols having more than trifunctionality can be controlled very rapidly. In the prepolymer side of the subject material, the urethane reaction can be bound-introduced in a certain amount, and the PUU suitable for lining applications can be constructed by containing a considerable amount of excellent polyol even in the composition of the curing agent.

The new fast-curable polyureaurethane material of the present invention in the regeneration of the old pipe is very superior to the existing material, but simple urea and urethane. This was compressed and shown in Tables 1 and 2 below.

division Existing material Polyurea Urethane Old pipeline wetted surface workability impossible possible Fault due to vibration Crack or destroy Excellent vibration resistance with the elastic component of urethane Drinking water compatibility Carcinogen Controversy (Bisphenol A, Benzopyrene) No carcinogen (53 items inspected) Whether it can be constructed with a thickness of 1 ~ 5 mm (bearing pressure tube) Can not flow down Excellent workability, and cracks / small holes (5 mm) prevent leakage

division Polyurea Urethane Urea urethane Wet cotton rehabilitation fitness Adhesion fitness Existing Use (New) Water pipe rehabilitation fuse Insulation, flooring, etc Response speed (optimal time for pipeline regeneration) Fast curing
(60 seconds) Super fast curing
(Within 5 seconds) Slow curing
(More than 10 minutes) Elasticity Flexible
(Burn protection during vibration) Hard Soft

The fast curing polyureaurethane of the present invention enables the lining in terms of wetting, the principle of which is as follows.

First, the prepolymer which is a main material is synthesize | combined by making isocyanate and polyol react. That is, it is produced by a reaction scheme such as R 1 -NCO + R 3 -O-H -----> R 2 -NCO.

Secondly, the properties of the main prepolymer exhibit the effect of inhibiting rapid reactivity and stabilizing water reactivity, thereby controlling the reactivity with water. The reaction mechanism with water consists of the following reaction formula.

As described above, the composition of the present invention is excellent in wet surface construction properties, defects due to vibration, drinking water compatibility, thin film construction and the like when used as a coating for rehabilitation of the old pipe.

Hereinafter, the present invention will be described in more detail based on the following examples. It should be noted, however, that the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The present invention is not limited to the following examples. Will be apparent to those skilled in the art to which the present invention pertains.

<Composition examples>

In the composition of Table 3 below, aliphatic polyisocyanate was used as the main material, and DETDA and PCL (Polycaprolactone) polyol, PPG-based Triol, Tetraol and Monomer polyol were added to the curing agent as a filler, reaction stabilizer, leveling agent, catalyst, and antioxidant. A fast curing polyureaurethane composition was prepared.

Item Composition substance ratio Subject matter Aliphatic Polyisocyate 90-100 parts by weight -HDI based NCO-Prepolymernate 90-
-PPG Triol, Polyether-amine Complex Prepolymer Hardener DETDA 35-50 parts by weight PCL (Polycaprolactone) Polyol
PPG Polyol Triol, Tetraol
Monomer 35-50 parts by weight Other substances Filler, reaction stabilizer, leveling agent, catalyst, anti-aging agent 1-5 parts by weight

At this time, the main material polyisocyante may be used isocyanate itself, but may be used by transforming with preamine by reacting with amines or polyols. As the PCL-based polyol, Capa 3022, Capa 3031, Capa 3041, Capa 3050, Capa 4101 (Solvay) and the like were used. In addition, as the PPG-based polyol, GR-600 (Basf), HD-402, NE-240 (Sanyo Chemical) and the like were used. As a monomer, 1.3BG, MPD, TEOA, and the like were used.

On the other hand, the specific scope of the present invention is defined by the claims rather than the embodiments described above, all changes and modifications derived from the meaning and scope and equivalent concepts of the claims to the scope of the invention It should be interpreted as including.

Claims (9)

1) 100 parts by weight of a main body composed of aliphatic polyisocyanate, which is an HDI-based NCO-Prepolymer or PPG Triol, a polyether-amine complex prepolymer in which isocyanate is reacted with amines or polyols,
2) 35 to 60 parts by weight of a curing agent comprising a polyamine DETDA (Diethyltoluene diamine), an OH-functional material PCL (Polycaprolactone) polyol and a triol or tetraol PPG-based polyol, and OH-functional monomer , And
3) A fast curing polyureaurethane composition for regeneration of an old pipe comprising 1 to 6 parts by weight of a filler, a reaction stabilizer, a leveling agent, a catalyst and an anti-aging agent selected from the group consisting of 1 to 6 parts by weight. delete delete delete delete delete delete delete delete