KR20000015868A - Compositions and methods for inhibiting deposits in pulp and papermaking systems - Google Patents

Abstract

PURPOSE: A composition for repressing the deposition of an emulsion contaminator is provided to add the composition including a polyvinyl alcohol, a high molecular weight gelatin, and a cationic polymer to a pulp or papermaking machine surface. CONSTITUTION: Compositions and methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. The methods add to the pulp or to the deposition prone surface of the papermaking system a composition comprising a polyvinyl alcohol having 50 to 100 % hydrolysis, a high molecular weight gelatin having a molecular weight of about 100,000 or higher, and a cationic polymer.

Description

Compositions and Methods of Inhibiting Deposition in Pulp and Paper Systems

This application is part of a continuing application of US Patent Application No. 08 / 651,077 (1996.5.22. 1996), which is part of US Patent Application Serial No. 08 / 421,349 (August 5,536,363).

Technical Field

The present application relates to compositions and methods for inhibiting deposition of organic contaminants in pulp and paper systems.

Background of the Invention

Deposition of organic contaminants in the pulp and paper system can lead to quality and efficiency problems in the pulp and paper system. Some components occur naturally in wood and are released during various pulping and papermaking processes. The term "pitch" is used to refer to deposits made of natural resins found in the pulp, salts thereof, as well as organic components that can be produced from coating binders, sizing agents, and antifoaming agents. Can be. In addition, the pitch often contains calcium carbonate, talc, clay, titanium and related materials.

The term “stickies” is increasingly used to describe deposits that occur in systems using recycled fibers. These deposits often contain adhesives, hot melts, waxes and inks as well as the same materials found in "pitch" deposits. All of the aforementioned materials have a number of common properties, including the possibility of causing problems with hydrophobicity, antifoaming, tackiness, low surface energy and deposition, quality and process efficiency. Table I shows the complex relationship between the pitch and sticky keys discussed herein.

Table I

pitch Stick Key Natural resins (fatty and resinous acids, fatty acid esters, insoluble salts, sterols, etc.) X X Antifoaming agents (oil, EBS, silicates, silicone oils, ethoxylated compounds, etc.). X X Sizing Agents [Rosin size, ASA, ADK, hydrolysates, insoluble salts, etc.] X X Sheath binders (PVAC, SBR) X X Wax X ink X Hot Melt (EVA, PVAC, etc.) X Contact adhesive (SBR, vinyl acrylate, polyisoprene, etc.) X

Deposition of organic contaminants can impair the efficiency of pulp or paper milling, thereby reducing both quality and operating efficiency. Organic contaminants may be deposited on the processing equipment of the papermaking system, causing operational problems in the system. Deposition of organic contaminants on light controls and other device probes can render these devices unusable. Such deposition can occur on metal surfaces of the system as well as plastic and synthetic surfaces such as machine wires, felts, foils, wool boxes and headbox parts.

Since the past, "pitch" and "sticky", which are part of the organic deposit problem, have occurred differently, they have been distinguished and treated separately. From a physical point of view, “pitch” deposits are generally formed from microparticles of cohesive material (natural or synthetic) in the stock that accumulate in a papermaking or pulping apparatus. These deposits can easily be found on stock chest walls, paper machine foils, wool boxes, paper machine wires, wet press felts, dryer felts, dryer cans, and calendar stacks. Difficulties associated with these deposits include direct disturbances in the efficiency of contaminated surfaces and reduced productivity and holes, dirt and other deteriorations in the quality and utility of paper for subsequent processes such as coating, conversion or printing. Contains sheet defects.

From a physical point of view, generally a "sticky" is a particle of visible or nearly visible size in a stock, produced from recycled fibers. These deposits tend to deposit on many of the same surfaces on which "pitch" can appear, and cause many of the same problems that "pitch" can cause. However, deposits associated with the most severe "sticky" tend to appear on paper machine wires, wet felts, dryer felts and dryer cans.

Pulp and paper mills and methods of inhibiting deposition of deposits on surfaces are of great industrial importance. The paper machine can be stopped for cleaning, but stopping work for cleaning results in reduced productivity, poor quality due to partial contamination, and “dirt” when deposits leave and get incorporated into the sheet. Because it is not desirable. Therefore, it is highly desirable to prevent deposition if it can be performed efficiently.

In the past, sticky deposits and pitch deposits have typically been found in different systems. In practice this is usually because only natural fibers or only recycled fibers are used for grinding. Often, very different treatment chemicals and methods have been used to solve this distinct problem.

At present, there is a trend to gradually use recycled fibers in all systems. As a result, sticky and pitch problems occur simultaneously in the grinder. It is desirable to find treatment chemicals and methods that are very effective in solving both of these problems without the need to supply two or more separate chemicals. It has been clearly identified that this object can be achieved using the materials of the invention.

Summary of the Invention

The present invention provides compositions and methods for inhibiting the deposition of organic contaminants from pulp in pulp and paper systems. The present invention includes adding a composition comprising polyvinyl alcohol, high molecular weight gelatin and cationic polymer to the pulp or paper machine surface.

Related fields of technology

US Pat. No. 4,871,424 teaches a method of inhibiting pitch deposition from pulp in a papermaking system using a water soluble polyvinyl alcohol having a hydrolysis rate of 50 to 100%. US Pat. No. 4,886,575 discloses a "stick, which is a hot melt and / or pressure sensitive viscous material on the surface of a repulping apparatus, using a polyvinyl alcohol residue containing some hydrophobic groups and having a hydrolysis rate of 70 to 99%. Teaches how to inhibit the deposition of a key ". See, "Pulp and Paper", James Casey, Vol. III, 3nd Ed., Pp. 1587-1588 teaches that gelatin is suggested as a means to solve the pitch problem.

Detailed description of the invention

The present invention comprises adding a composition comprising polyvinyl alcohol, high molecular weight gelatin and cationic polymer to the pulp or paper machine surface in an amount effective to inhibit deposition, thereby preventing organic contaminants from the pulp in the pulp and paper machine system. A composition and method for inhibiting deposition on the surface of a paper machine.

Organic contaminants include components that appear in pulp (natural pulp, recycled pulp or mixtures thereof) that are likely to deposit and reduce paper machine performance or paper quality. It is deposited in natural resins such as fatty acids, resin acids, insoluble salts thereof, fatty acid esters, sterols and other organic components such as ethylene bis-stearicamide, waxes, sizing agents, tackifiers, hot melts, inks, antifoams and papermaking systems. And latex which may be.

The polyvinyl alcohol of the present invention can be derived or synthesized by polymerizing vinyl acetate to form polyvinyl acetate, which is alcoholized or hydrolyzed. The polyvinyl alcohol may have a hydrolysis rate of about 50 to 100%, with about 70 to about 100% being preferred. The term "hydrolysis rate" is defined as the molar ratio of hydroxyl groups to the starting acetate group of the hydrolyzed polyvinyl acetate polymer (polyvinyl alcohol) multiplied by 100. Most preferably, the hydrolysis rate of the polyvinyl alcohol is about 85.5 to about 87%. In addition, the polyvinyl alcohol preferably has a molecular weight of about 15,000 to about 125,000. Polyvinyl alcohol useful in the present invention is readily available. Representative polyvinyl alcohols include the Air Products Corporation, respectively (Air Products, Inc.) Company, available Air Products as a ball (Airvol ^R) 205 (MW about 25,000), an air ball ^R 523 (MW about 78,000) and the air ball ^R 540 ( MW approximately 125,000).

Preferred gelatin for use in synergistic compositions has a molecular weight ranging from about 100,000 to about 250,000. Most preferably, the gelatin has a molecular weight of about 130,000. Such gelatin is commercially available from Hormel Foods under the trade name Flavorset GP-4. The term "high molecular weight gelatin" is defined as gelatin having a molecular weight of about 100,000 or more.

Cationic polymers useful in the present invention are generally derived from ethylenically unsaturated monomers containing protonated or quaternized ammonium polymers, amines or quaternary ammonium groups, such as reaction products of epihalohydrins with one or more amines. And an acrylamide copolymer prepared by reacting acrylamide with an ethylenically unsaturated cationic monomer.

Such cationic polymers can be derived from the reaction of epihalohydrins, preferably epichlorohydrin with dimethylamine, ethylene diamine and polyalkylene polyamines. Preferred cationic polymers include reaction products of epihalohydrin with dimethylamine, diethylamine or methylethylamine. More preferred polymers include polyamines and polyethyleneimines (PEIs).

Typical cationic monomers useful for preparing the cationic polymers of the present invention are amine containing monomers, or or Quaternary ammonium salt containing monomers wherein R ₁ is hydrogen or lower C ₁ -C ₃ alkyl, R ₂ and R ₃ are independently of each other hydrogen or hydroxyl, and R ₄ , R ₅ and R ₆ are independently of each other; Lower C ₁ -C ₃ alkyl or benzyl, A is O or NH, y is 1 to 5, X is chloride or methosulfate).

Typical cationic monomers commonly copolymerized with acrylamide include aminoalkylacrylate esters and quaternary ammonium salts thereof (quaternized with quaternizing agents such as methyl chloride, dimethyl sulfate, benzyl chloride, and the like); Aminoalkylmethacrylate esters and their quaternary ammonium salts; Aminoalkylacrylamides and their quaternary ammonium salts; Aminoalkylmethacrylamides and their quaternary ammonium salts; Diallyldialkylammonium salt monomers; Vinyl benzyl trialkyl ammonium salt, and the like.

Examples of cationic monomers that can be used in the process of the invention include diallyldiethylammonium chloride, diallyldimethylammonium chloride (DADMAC), acryloyloxyethyltrimethylammonium chloride (AETAC), methacryloyloxyethyltrimethylammonium Chloride (METAC), methacrylamidopropyltrimethylammonium chloride (MAPTAC), acrylamidopropyltrimethylammonium chloride (APTAC), acryloyloxyethyltrimethylammonium methosulfate (AETAMS), methacryloyloxyethyltrimethylammonium meto Sulfates (METAMS), acryloyloxyethyldiethylmethylammonium chloride and methacryloyloxyethyldiethylmethylammonium chloride. Also useful in the present invention are mixtures of cationic monomers with acrylamide for preparing cationic polymers. The present invention also contemplates that copolymers of cationic monomer mixtures in the absence of acrylamide, as well as homopolymers of cationic monomers, are useful. The above description of cationic polymers should not be construed as limiting the invention.

Surprisingly, the components, when mixed, optionally suppress the deposition of organic contaminants more than the respective components constituting the mixture. Thus, very effective inhibitors useful in pulp and papermaking systems can be prepared. The activity of the mixture can be enhanced to reduce the total amount of deposition inhibitors upon treatment. In addition, the high degree of inhibition provided by each component can be used without increasing the concentration of each component.

Compositions comprising polyvinyl alcohol, high molecular weight gelatin and cationic polymers have a weight ratio of PVA to gelatin of about 8: 1 to about 20: 1 and a weight ratio of gelatin to cationic polymer of about 10: 1 to about 0.2: 1. In this case, activity as a deposition inhibitor is improved.

The composition of the present invention is effective to inhibit the deposition of organic contaminants in the papermaking system. Papermaking systems may include kraft, sulfurous acid, mechanical pulp and recycled fiber systems. For example, it is possible to inhibit deposition in brown stock washer, screen rooms, and decker systems in kraft papermaking processes. The term "papermaking system" encompasses all pulp processes. In general, it is believed that these compositions can be used to inhibit deposition on the paper system surface under a variety of system conditions, from pulp mills to reels of paper machines with a pH of about 3-11. More specifically, the compositions effectively reduce deposition on metal surfaces as well as plastic and synthetic surfaces such as machine wires, felts, foils, wool boxes, rolls, and headbox components.

The composition of the present invention may be mixed with other pulp and paper additives. These may include starch, titanium dioxide, antifoams, wet stength resins, and sizing agents.

The composition of the present invention can be added to the papermaking system at any stage. The composition of the present invention can be added directly to the pulp plant or indirectly through the headbox to the pulp plant. In addition, the compositions of the present invention may be sprayed onto the surfaces to be deposited, such as wires, press felts, press rolls and other depositable surfaces.

The compositions of the present invention can be added to pure papermaking systems in powder, slurry or solution form. Preferred main solvents are but are not limited to water. When added by spraying techniques, the compositions of the present invention are preferably diluted to a suitable inhibitor concentration with water. The compositions of the invention can only be added specifically to equipment found to be contaminated or to mixed pulp. The composition may be added at any point before deposition problems occur and, if more than one deposition site occurs, to one or more sites. Each of these polyvinyl alcohol or high molecular weight gelatin or cationic polymers can be used in combination by adding them individually, feeding them to pulp mill stock, feeding them to paper machine equipment, and spraying them onto wires and felts simultaneously.

The effective amount of the composition added to the papermaking system depends on a number of variables, including the pH of the system, the hardness of the water, the temperature of the water, the type of additional additives and organic contaminants and their content in the pulp. Generally, the composition of the present invention is added to the papermaking system in an amount of 0.5 to about 150 parts per million parts of pulp. Preferably, the composition of the present invention is added to the papermaking system in an amount of about 2 to about 100 parts per million parts of pulp.

The present invention has several advantages over the prior method. These advantages include the ability to work without being significantly affected by the water hardness in the system, the ability to work without adversely affecting sizing and differential retention, the ability to work at very low contents, reduced environmental impact and increased biodegradation. Last name is included.

In addition, these compositions have proven effective against the generation of organic contaminant deposition problems, pitch and sticky, while effectively reducing the problems of paper milling using various natural fiber stocks and recycled fiber stocks.

The data described below are presented to demonstrate the unexpected results exhibited by using the present invention. The following examples are included to illustrate the invention and should not be construed as limiting the scope of the invention.

Example

Standard Tape Adhesion Test

In order to demonstrate the effectiveness of the compositions of the invention as deposition inhibitors on sticky contaminants of the type appearing on recycled pulp, especially on plastic surfaces, adhesive coated tapes on the back are tested in the lab using sticky coupons. Sticky coupons can be made from any type of adhesive tape that does not degrade when placed in water. For this study, tapes made from styrenebutadiene rubber and vinyl esters are used. Both of these potential organic contaminants are known to cause sticky problems when using secondary fibers. Another coupon is made from a polyester film such as MYLAR ^R , a product sold by DuPont Chemical Company. The choice of this material is that papermaking machines for making fabrics are made using polyester, which is often prone to serious deposition problems caused by sticky keys and / or pitches.

In this test, a 2 "x 4" adhesive tape and a 2 "x 4" polyester mylar coupon were immersed in 600 mg of test solution. The solution contained in a 600 ml beaker is left in the bath with stirring and heated to the desired temperature. After 30 minutes of immersion, the tape and coupon are removed from the solution and pressed for 1 minute with a force of 10,000 lbs. The tensile test instrument (Instron) is then used to measure the force required to separate the tape from the coupon. The decrease in force required indicates that the "sticky" is sticky. Inhibition rate (%) or detackification (%) is calculated by the following equation.

Negative adhesion (%) = (force untreated-force applied) / force untreated × 100

In addition, the contact angle is measured using the composition of the present invention. The sticky surface of the mylar or tape is clamped at the film stage and placed in a glass test cell. Carefully inject 15 ml of the test solution into the test cell. The entire test cell is then placed inside the chamber of the goniometer (Kruss G1). The sticky surface of the silane or tape is immersed in the test solution for 30 minutes to simulate the contact time as in the standard tape adhesion test. From the contact angle, one can learn about the hydrophobicity of the simulated sticky surface and the hydrophobicity when the surfactant material is absorbed and / or removed from the surface. If the contact angle of the treated solution is smaller than the contact angle of the untreated solution, this indicates that the hydrophilicity on the surface is further increased or the viscosity is further reduced.

For the examples below, the following symbols are used for the treatment agents.

Example No. 1 is Airball ^R 540: High Molecular Weight (HMW) gelatin: Polyamine in a weight ratio of 9: 1: 1.

Example number 2 is Airball ^R 540: HMW gelatin in a weight ratio of 8: 1.

Example 3 is Airball ^R 540: HMW Gelatin at a weight ratio of 15: 1.

Example number 4 is an airball ^R 540.

Airball ^R 540 is polyvinyl alcohol (PVA, MW is about 125,000) purchased from Air Products Incorporated.

Table I

Measurement of contact angle at 25 ° C-MYLAR surface

Example number Content (ppm) Contact angle One 2 19 One 2.5 18 2 2.5 32 3 2.5 24

As demonstrated in Table I, the compositions of the present invention consisting of PVA, HMW gelatin and cationic polymers are more effective than PVA, a known inhibitor. Further studies are conducted to determine the peel force of various treatments. The results are shown in Table II.

Table II

Southern Tissue Mill White Fahrenheit 78 ° F

Treatment agent (ppm) Peeling force (lb 5 minutes 15 minutes Control 2.291 1.257 4 (1 ppm) 1.328 0.898 1 (1 ppm) 0.816 0.246

Further contact angles are measured for other water. The results are shown in Table III.

Table III

Contact angle of mylar or wax, Midwestern Liner Board, Wilhelmy plate, contact time 2 seconds

Treatment number (ppm) Contact angle Mylar (T = 78 ℉) Wax (T = 115 ° F) Control 30.1 17.7 4 (10) 14.4 13 1 (10) 7.2 0.5 4 (20) 15 1 (20) 0.5

Table IV

Effect of Dilution on Contact Angle, Midwestern Liner Board

Treatment number (ppm) Contact angle First solution Second solution Tertiary solution Fourth solution Control 73 74 74 75 4 (2.5) 52 52 54 55 1 (2.5) 21 19 18 19

Treatment with three components according to the invention from Tables III and IV proved more effective than PVA in reducing tackiness.

Table Ⅴ

Interfacial Viscosity, Midwestern Tissue Mill White Water / Oil, Interfacial 125 ° F

Treatment number (ppm) Interfacial Viscosity (S.C.P.) Control 0.17 4 (5) 0.19 1 (5) 0.47 4 (10) 0.46

Interfacial viscosity (S.C.P. = surface centipoise) is calculated by measuring dynamic interfacial tension. The interfacial viscosity tells about the stability of the sticky or the pitch in the solution. If the interfacial viscosity of the treated solution is higher than the interfacial viscosity of the untreated solution, this indicates that the pitch or sticky particles are more stable in the treated solution. This indicates less pitch or sticky particles are deposited. As demonstrated in Table V, the compositions of the present invention provide better results than PVA.

Table VI

Interfacial Viscosity of Treated Midwestern Tissue Mill, White Water / Oil Interface at 80 ° F

Treatment number (ppm) Interfacial Viscosity (S.C.P.) Control 0.13 4 (5) 0.23 1 (5) 0.39 4 (10) 0.34 1 (10) 0.45

As demonstrated in Table VI, the compositions of the present invention provide a solution that is more stable and less deposited than PVA alone. In Table VII it is demonstrated that similar results are seen at higher temperatures.

Table Ⅶ

Interfacial Viscosity of Treated Midwestern Tissue Mill, 100 ° F White Water / Oil Interface

Treatment number (ppm) Interfacial Viscosity (S.C.P.) Control 0.23 4 (5) 0.34 1 (5) 0.47 4 (10) 0.36 1 (10) 0.49

In addition, peel force was tested with respect to white water, and the result is shown in Table VII.

Table Ⅷ

Peeling force, Midwestern tissue mill white water, 80 ℉

Treatment number (ppm) Peeling force (lb Tape (10 minutes) Mylar (5 minutes) Mylar / Tape (5 minutes) Control 4.67 2.51 2.5 1 (1) 1.63 1.75 0.626 4 (1) 2.70 2.25 0.963

Table Ⅸ

Peel Force, Midwestern Tissue Mill White, 100 ℉

Treatment number (ppm) Peeling force (lb Mylar processed (5 minutes) Treated tape (5 minutes) Control 1.674 1.442 4 (1) 1.43 1.152 1 (1) 1.077 0.567 4 (2) 1.117 1 (2) 0.89 4 (3) 0.987 1 (3) 0.87

Table Ⅹ

Peel Force, Midwestern Tissue Mill White, 109 ° F, 5 Minute Treated Tape

Treatment number (ppm) Peeling force (lb Control 2.331 4 (1) 1.09 1 (1) 0.697

Table XI

Peel Force, Midwestern Tissue Mill White Water, 120 ° F, 5 Minute Treated Tape

Treatment number (ppm) Peeling force (lb Control 2.331 4 (2) 1.115 1 (2) 0.694

It is demonstrated from Tables VIII to XI that the composition consisting of the PVA / HMW gelatin / cationic polymer of the present invention is more effective at adhering the liner board solution than the PVA alone.

Table XII

Interfacial Viscosity, Midwestern Tissue Mill White / Oil Interface, 120 ° F

Treatment number (ppm) Interfacial Viscosity (S.C.P.) Control 0.23 4 (5) 0.39 1 (5) 0.49

Table XIII

Effect of temperature on interfacial viscosity, midwestern tissue mill white water / oil interface

Treatment number (ppm) Interfacial Viscosity (S.C.P.) 120 ℉ 80 ℉ 100 ℉ Control 0.23 0.13 0.23 4 (5) 0.39 0.23 0.34 1 (5) 0.49 0.39 0.47 4 (10) - 0.36 0.36 1 (10) - 0.45 0.49

From Tables XII and XIII it is demonstrated that the compositions of the present invention can further inhibit deposition on white water solutions, as can be seen by higher interfacial viscosity than PVA alone.

Table XIV

Contact angle, midwestern tissue mill white water, mylar / contact time = 10 minutes

Treatment number (ppm) Contact angle 100 ℉ 120 ℉ 86 ℉ Control 45 39 50 4 (1) 20 11 - 1 (1) 8 8 - 4 (2) 22 - 41 1 (2) 8 - 13

Table XV

Interfacial viscosity, Southern liner board filtrate / min. Oil, 124 ℉

Treatment number (ppm) Interfacial Viscosity (S.C.P.) Control 0.19 1 (2) 0.3 1 (4) 0.46 4 (4) 0.29 4 (8) 0.36

Table XVI

Interfacial viscosity, Southern liner board filtrate / min. Oil, 131 ℉

Treatment number (ppm) Interfacial Viscosity (S.C.P.) Control 0.12 1 (4) 0.35 1 (8) 0.38 4 (4) 0.22 4 (8) 0.32

From Tables XV and XVI, it is demonstrated that the compositions of the present invention can further inhibit deposition on white water solutions, as can be seen by the higher interfacial viscosity than PVA alone.

Table XVII

Peeling force, midwestern liner board solution

Treatment number (ppm) Peeling force (lb 123 ℉ 131 ℉ Control 0.693 0.652 4 (0.5) 0.681 0.461 1 (0.5) 0.317 0.331

Table XVII

Effect of Dilution on Contact Angle, Southern Liner Board Solution

Treatment number (ppm) Peeling force (lb First solution Second solution Tertiary solution Control 84 - - 4 (4) 21 59 59 4 (1) 7 9 10

While the invention has been described in connection with specific embodiments thereof, many other forms and modifications of the invention will be apparent to those skilled in the art. It is intended that the claims of the present invention cover all such obvious forms and modifications within the true spirit and scope of this invention.

Claims (29)

A composition comprising a polyvinyl alcohol having a hydrolysis rate of 50 to 100% and a molecular weight of about 15,000 to about 125,000, a high molecular weight gelatin and a cationic polymer having a molecular weight of about 100,000 to about 250,000, wherein the weight ratio of polyvinyl alcohol to gelatin is About 9: 1, and the weight ratio of high molecular weight gelatin to cationic polymer is about 1: 1) from the pulp in the pulp and paper system, Method of inhibiting the deposition of organic contaminants. The process of claim 1 wherein the hydrolysis rate of the polyvinyl alcohol is between 85.5 and 87%. The method of claim 1 wherein the cationic polymer is a reaction product of epihalohydrin with an amine. The method of claim 3 wherein the epihalohydrin is epichlorohydrin and the amine is selected from the group consisting of dimethylamine, ethylenediamine and polyalkylene polyamines. The method of claim 1 wherein the cationic polymer is a reaction product of acrylamide and ethylenically unsaturated cationic monomer. The process of claim 5 wherein the ethylenically unsaturated cationic monomer is of formula or Wherein R ₁ is hydrogen or lower C ₁ -C ₃ alkyl, R ₂ and R ₃ are independently of each other hydrogen or hydroxyl, and R ₄ , R ₅ and R ₆ are independently of each other lower C _1- C ₃ alkyl or benzyl, A is O or NH, y is 1 to 5 and X is chloride or methosulfate. The method of claim 6, wherein the cationic monomer is diallyldiethylammonium chloride, diallyldimethylammonium chloride, acryloyloxyethyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, methacrylamidopropyltrimethylammonium chloride , Acrylamidopropyltrimethylammonium chloride, acryloyloxyethyltrimethylammonium methosulfate, methacryloyloxyethyltrimethylammonium methosulfate, acryloyloxyethyldiethylmethylammonium chloride methacryloyloxyethyldiethylmethylammonium Chloride, methacryloyloxyethyldiethylmethylammonium chloride and methacryloyloxyethyldiethylmethylammonium chloride. The method of claim 1 wherein the cationic polymer is selected from the group consisting of polyamines and polyethyleneimines. The method of claim 1, wherein the organic contaminants are stickies deposits. The method of claim 1, wherein the organic contaminants are pitch deposits. A composition comprising a polyvinyl alcohol having a hydrolysis rate of 50 to 100% and a molecular weight of about 15,000 to about 125,000, a high molecular weight gelatin and a cationic polymer having a molecular weight of about 100,000 to about 250,000, wherein the weight ratio of polyvinyl alcohol to gelatin is About 9: 1, and the weight ratio of high molecular weight gelatin to cationic polymer is about 1: 1) to the surface of the paper machine and apparatus in the pulp and paper system, in an amount of 0.5 to about 150 parts per million parts of pulp. A method of inhibiting deposition of organic contaminants from pulp on the surface. The method of claim 11 wherein the polyvinyl alcohol has a hydrolysis rate of 85.5 to 87%. The method of claim 11, wherein the cationic polymer is a reaction product of epihalohydrin with an amine. The method of claim 13 wherein the epihalohydrin is epichlorohydrin and the amine is selected from the group consisting of dimethylamine, ethylenediamine and polyalkylene polyamines. The method of claim 11, wherein the cationic polymer is a reaction product of acrylamide and ethylenically unsaturated cationic monomer. 16. The process of claim 15 wherein the ethylenically unsaturated cationic monomer is of formula or Wherein R ₁ is hydrogen or lower C ₁ -C ₃ alkyl, R ₂ and R ₃ are independently of each other hydrogen or hydroxyl, and R ₄ , R ₅ and R ₆ are independently of each other lower C _1- C ₃ alkyl or benzyl, A is O or NH, y is 1 to 5 and X is chloride or methosulfate. The method of claim 16, wherein the cationic monomer is diallyldiethylammonium chloride, diallyldimethylammonium chloride, acryloyloxyethyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, methacrylamidopropyltrimethylammonium chloride , Acrylamidopropyltrimethylammonium chloride, acryloyloxyethyltrimethylammonium methosulfate, methacryloyloxyethyltrimethylammonium methosulfate, acryloyloxyethyldiethylmethylammonium chloride methacryloyloxyethyldiethylmethylammonium Chloride, methacryloyloxyethyldiethylmethylammonium chloride and methacryloyloxyethyldiethylmethylammonium chloride. The method of claim 11, wherein the cationic polymer is selected from the group consisting of polyamines and polyethyleneimines. The method of claim 11, wherein the organic contaminants are sticky deposits. The method of claim 11, wherein the organic contaminants are pitch deposits. The method of claim 11, wherein the surface is selected from the group consisting of wires, press felts and press rolls. Synergistic mixture of polyvinyl alcohol (a) having a hydrolysis rate of 50 to 100% and a molecular weight of about 15,000 to about 125,000, a high molecular weight gelatin (b) and a cationic polymer (c) having a molecular weight of about 100,000 to about 250,000 mixture), wherein the weight ratio of (a) :( b) is about 8: 1 to about 20: 1 and the ratio of (b) :( c) is about 10: 1 to about 0.2: 1 Composition. 23. The process of claim 22 wherein the polyvinyl alcohol has a hydrolysis rate of 85.5 to 87%. The method of claim 22, wherein the cationic polymer is a reaction product of epihalohydrin with an amine. The method of claim 24 wherein the epihalohydrin is epichlorohydrin and the amine is selected from the group consisting of dimethylamine, ethylenediamine and polyalkylene polyamines. The method of claim 22, wherein the cationic polymer is a reaction product of acrylamide and ethylenically unsaturated cationic monomer. The method of claim 26, wherein the ethylenically unsaturated cationic monomer is of formula or Wherein R ₁ is hydrogen or lower C ₁ -C ₃ alkyl, R ₂ and R ₃ are independently of each other hydrogen or hydroxyl, and R ₄ , R ₅ and R ₆ are independently of each other lower C _1- C ₃ alkyl or benzyl, A is O or NH, y is 1 to 5 and X is chloride or methosulfate. The method of claim 27, wherein the cationic polymer is diallyldiethylammonium chloride, diallyldimethylammonium chloride, acryloyloxyethyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, methacrylamidopropyltrimethylammonium chloride , Acrylamidopropyltrimethylammonium chloride, acryloyloxyethyltrimethylammonium methosulfate, methacryloyloxyethyltrimethylammonium methosulfate, acryloyloxyethyldiethylmethylammonium chloride methacryloyloxyethyldiethylmethylammonium Chloride, methacryloyloxyethyldiethylmethylammonium chloride and methacryloyloxyethyldiethylmethylammonium chloride. The method of claim 22, wherein the cationic polymer is selected from the group consisting of polyamines and polyethyleneimines.