CS209110B1 - Primer for insulating storage pipes and method of manufacturing - Google Patents

Abstract

Primer for insulating storage pipes and method of producing the same The invention relates to a primer for insulating storage pipes and method of producing the same. The essence of the invention is a mixture consisting of 1.5 to 30.5 wt. % of a semi-finished product composed of 1.0 to 15.0 wt. % of natural rubber, maximum 7.0 wt. % of butadiene ethylene rubber. 0.2 to 4.0 wt. % of polyole rin, 0.02 to 0.3 wt. % of antioxidants. 0.08 to 1.2 wt. % of corrosion inhibitors, 0.2 to 2.5 wt. % of active carbon black and further maximum 5.0 wt. % of polyolefins, 3.5 to 44.0 wt. % of ableether, maximum 15.0 wt. % of abifen and maximum 0.5 wt. % phthalate plasticizer, dissolved in 5.0 to 95.0 wt. % organic solvents or in a mixture of organic solvents and diluents. The application of the invention is wide. The invention can be used as a primer for insulating pipes with various types of laminated plastic foils, while modifications of primers that are non-flammable or are class II combustibles are used for manual insulation and β modifications that are class I combustibles are used for manual insulation. Furthermore, the coating can be used for insulating welds of pipes provided with factory insulation from plastics and for repairing damaged insulation from plastics and asbestos. The coating according to the invention can also be used for insulating other steel and reinforced concrete structures and devices against atmospheric and soil corrosion and stray currents, as well as for repairing cable insulation.

Description

( ⁵⁴ ) Primer for insulating storage pipes and process for its manufacture

Primer for insulation of storage piping and method of its production

The invention relates to a primer for insulating liners and to a process for producing the same.

The present invention is based on a composition comprising

1.5 to 30.5 wt. % of a preform composed of 1.0 to 15.0 wt. % natural rubber, maximum 7.0 wt. % butadiene ethylene rubber. 0.2 to 4.0 wt. % polyolefin, 0.02 to 0.3 wt. % antioxidants. 0.08 to 1.2 wt. 0.2 to 2.5 wt. % of active carbon black, and in addition to a maximum of 5.0 wt. % polyolefins,

3.5 to 44.0 wt. % ableeter, maximum 15.0 wt. % of abifene and max.

% phthalate plasticizer dissolved in 5.0 to 95.0 wt. % of organic solvents or in a mixture of organic solvents and diluents.

The application of the invention is broad. The invention can be used as a primer for insulating pipes by various kinds of laminated plastic films, with modifications to primers that are non-flammable or flammable

II. classes to be used for ethnographic and manual isolation of β modification, which are flammable class I, and to be used for manual isolation. In addition, the coating can be used to insulate pipe welds provided with factory plastic insulation and to repair damaged plastic and blunt insulations. The coating according to the invention can also be used for insulating other steel and reinforced concrete structures and devices against atmospheric and soil corrosion and stray currents, as well as for repairing cable insulation.

209 110

The invention relates to a primer for insulating liners and to a process for producing the same.

The prior art primers, which serve as adhesives for insulating pipes with laminated plastic films, are mainly based on butyl rubber and synthetic resins. The disadvantage of these primers is that a specific primer is required for each type of insulated tape. Some of these coatings find unsatisfactory anticorrosive properties. 31 other primers for machine insulation They are highly flammable. They have a very low flash point and therefore ββ often happens due to static electricity generated by machine unwinding of tapes, fires that can destroy the insulating machine.

□ another primer is the primer according to MS. No. 187 902, based on a mixture of butadiene acrylenitrile and chloroprene rubber. 3The disadvantage is instability and cost. This primer, and after some time of storage or due to higher temperatures precipitates, butadiene acrylonitrile rubber is precipitated from the solution. Another disadvantageous property is acrylonitrile butadiene kercinogennoate. Such co-uses of toluene and trlchlorethylene as solvents for this primer are unsuitable, since poisonous foegene is produced by thermal decomposition of trlchlorethylene due to possible ignition due to the low flash-point of toluene. This primer is difficult to manufacture because acrylonitrile butadiene rubber is difficult to process and soluble.

The drawbacks are eliminated by the primer according to the invention, which consists of a mixture consisting of

3.6 to 15.0% by weight of a semi-finished product composed of 1.6 to 6.5% by weight of natural rubber, 1.0 to 4.0% by weight of butadiene-styrene rubber, 0.6 to 2.5% by weight of atactic polypropylene, 0.15 to 0.75% by weight of phenyl-β-naphthylamine, 0.25 to 1.25% by weight of active carbon black, 3.2 to 13.5% by weight of a mixed ester of pentaeritrile and rosin acids, and 3.2 to 13.5% by weight of rosin-modified diphenolpropane-formaldehyde resin, dissolved in 58.9 to 90.0% by weight of aliphatic, aromatic or chlorinated solvents.

The primer according to the invention aa produces 75.0% by weight of the total amount of natural rubber in a kneader by dissolving the preform on a two-roll calender to which aa is gradually added and after admixing it, butadiene ethylene rubber and vaporizes, and then becomes homogeneous. phenyl-β-naphthylarain and then progressively active carbon black, eventually vkalandrujo the remaining 25% by weight of natural rubber, whereupon both resins are added to the homogeneous solution and dissolved and homogenized as a result.

In particular, the coating according to the invention has the advantage that it is universally applicable to various types of laminated plastic insulating films. It can be made in several modifications, which are non-flammable, respectively. non-flammable depending on the organic solvent used. This primer provides good adhesion between the steel pipe surface and the laminated insulating foil. It has such good adhesion to plastics, so that it is suitable for insulating pipe welds of plastic insulation and for repairing damaged insulation. At the same time it has good anticorrosive properties. For long-term storage Jo stable. 3e is made of inexpensive raw materials and is therefore cheaper than previously known primers for insulating pipes with laminated plastic tapes. When compared to known primers and in conjunction with the respective insulating tapes, this primer has adhered to the mechanical, adhesive and anticorrosive properties.

Example 1

90.0 parts by weight of the preformed stock are dissolved in 750.0 parts by weight of technical toluene from a continuous mixer. After dissolution of the ee, 80.0 pbw of CHS abiestre 100 P - a mixed ester of pentaeritrite and resin acids from rosin and 80.0 pbw of CHS abifene 125 O - dlphenolpropanformaldahydic resin modified with rosin are added to the solution. Allow the mixture ae to dissolve and homogenize in a kneader until a homogeneous primer solution is formed.

Example 2

Let 80.0 parts by weight of the preformed stock dissolve in 765.0 parts by weight of technical gasoline 80/120 in a mixer and with continuous stirring. After dissolution, 75.0 parts by weight of CHS abiestar 100 P - rosin resin acid pentaeritrite β 75.0 parts by weight of CHS abifene 125 O · diphenolpropenformeldehyde resin modified with rosin are added to the solution. The mixture was allowed to dissolve and homogenise in a kneader until a homogeneous primer solution was formed.

♦

Example 3

In a kneader, 70.0 parts by weight of the preformed stock are dissolved in 810.0 parts by weight of technical trlorethylene. After dissolution, 60.0 parts by weight of CHS abiestre 100 P - a mixed ester of pentaeritrite and rosin resins and 60.0 parts by weight of CHS abifene 125 dif - diphenolpropanforraaldehyde resin modified with rosin are added to the solution. The mixture is allowed to dissolve and homogenise in a kneader until a homogeneous primer solution is formed.

Example 4

36.0 parts by weight of the preformed stock are dissolved in 900.0 parts by weight of technical trichlorethylene in a kneader with stirring. After dissolution, 32.0 parts by weight of CHS abieeter 100 P - a mixed ester of pentaeritrite and resin acids from rosin and 32.0 parts by weight of CHS abifene 125 O are added to the solution by the rosin-modified diphenolpropane-formaldehyde resin. The mixture is allowed to dissolve and homogenise in a kneader until a homogeneous primer solution is formed.

Example 5

150.0 parts by weight of the preformed stock are dissolved in 580.0 parts by weight of technical toluene with continuous stirring. After dissolution of the solution, 135.0 parts by weight of CHS abieeter 100 P - mixed pentaeritrite ester and rosin resin acids and 135.0 parts by weight of CHS abifene 125 O - dlphenolpropenformeldehyde resin modified with rosin are added. The mixture is allowed to dissolve and homogenise in a kneader until a homogeneous primer solution is formed. The stock ee is prepared on a two-roll calender.

First, ββ plasticizes 30.0 parts by weight of natural rubber, and as soon as the cylinder is wrapped with rubber, it adds a successive 14.0 parts by weight of atactic polypropylene. Then, 24.0 parts by weight of butadiene ethylene rubber is calendered into the emales. Thereafter, 4.5 parts by weight of phenyl-β-naphthylamine are added to the mixture, followed by 7.5 parts by weight of active carbon black. Finally, 10.0 parts by weight of natural rubber are calendered into the emate.

The use of the invention is broad. The invention can be used as a primer for insulating. Piping with different types of laminated plastic films, wherein modifications of primers which are non-flammable or second class combustible, are used for mechanical and manual insulation, and modifications are class I combustible, and used for manual insulation . In addition, the coating can be used to insulate pipe welds with factory-made plastic insulation and to repair damaged plastic and bitumen insulation. The coating according to the invention can also be used for insulating other steel and reinforced concrete structures and devices against atmospheric and soil corrosion and stray currents. As well as for cable insulation repairs.

Claims (2)

I will invent the subject 1. Primer for insulating liners, characterized in that it consists of 3.6 to 15.0% by weight of a semi-finished product composed of 1.6 to 6.5% by weight of natural rubber, 1.0 to 4.0% by weight butadiene ethylene rubber, 0.6 to 2.5% by weight of atactic polypropylene, 0.15 to 0.75% by weight of phenyl- (3-naphthylamine), 0.25 to 1.25% by weight of active carbon black, and 3.2 to 13.5% by weight of pentaeritrite and etheric resins of pentaeritrite rosins and 3.2 to 13.5% by weight of rosin-modified diphosphine-formaldehyde resin, dissolved in 58.0 to 90.0% by weight of aliphatic, aromatic or chlorinated solvents. 2. A process for the production of a primer according to claim 1, comprising first dissolving the preformed product on a two-roll calender by plasticizing 75.0% by weight of the total amount of natural rubber to which atactic polypropylene is added gradually, after mixing, calendering The butadiene-ethylene rubber is homogenized, then fanyl-.beta.-naphthylamine and then active carbon black are mixed in, finally calendering the remaining 25.0% by weight of natural rubber, then adding both resins to the homogeneous solution of the stock and dissolving the resulting mixture. homogenizes.