Paper softener composition

Abstract

The present invention relates to a paper softener composition, a method for treating paper with the softener composition, and a paper product treated with the softener composition. The softener composition comprises 0.1-20 wt % of an aminopolysiloxane of the following formula (I) and 10-80 wt % of a monohydroxy or polyhydroxy alcohol, wherein the weight ratio of the aminopolysiloxane to the polyol is 0.2-0.001. #imgabs0#

Description

Technical Field

[0001] The present invention relates to a paper softener composition, a method for treating paper with the softener composition and a paper product treated with the softener composition. Prior art

[0002] In modern life, people have higher and higher requirements for the softness of paper. Therefore, it is more and more important to use a suitable softener to improve the softness of paper. Here, the "paper" refers in particular to paper products for daily use such as wet wipes, handkerchiefs, napkins, beauty tissues, box tissues, etc., which generally have certain requirements for softness, fluffiness or water absorption.

[0003] Paper softener products are usually made of quaternary ammonium salts, lubricants or silicones, etc. They are usually applied to the paper surface by brushing, roller coating or pulp addition.

[0004] For example, CN101509213A discloses a bisamide quaternary ammonium salt paper softener and a preparation method and application thereof.

[0005] In addition, Yang Qinwu et al. compared the effects of different cationic softeners on paper in the article "Effects of Different Cationic Softeners on the Properties of Household Paper" (Cellulose Science and Technology, Vol. 23, No. 1, March 2015). These cationic softeners include imidazoline, polyacrylamide, quaternary ammonium salts, fatty acid esters and silicones. The comparison results show that silicone softeners containing amino groups have the best performance in terms of softness.

[0006] However, in addition to improving the softness of paper, paper, especially wet wipes manufacturers are also paying more and more attention to the skin affinity of paper treated with softeners (especially in the case of amino-containing organosilicon compounds that are prone to irritating the skin), and how to increase the coating amount of softeners to reduce production costs and save raw materials, while maintaining the softness and strength of the paper as much as possible.

[0007] Another document CN103061204B discloses a softener emulsion composition, which contains, in particular, a diorganopolysiloxane, a monohydroxyl or polyhydroxyl alcohol moisturizer, and a thickener. The recommended coating amount of the softener emulsion composition is 1%-20% based on the base paper basis weight, and the composition must contain a thickener. In addition, the document does not disclose any specific diorganopolysiloxane compound.

[0008] In addition, a novel piperidinyl organosiloxane is disclosed in US Pat. No. 5,721,297 A. However, the document only uses the organosiloxane as a light and UV stabilizer for polymer substrates such as polyethylene or polydiene. SUMMARY OF THE INVENTION

[0010] To address the above-mentioned tasks, the present application provides a softener composition as described below, which comprises a combination of a special aminopolysiloxane and a monohydroxy or polyhydroxy alcohol in a specific dosage ratio. Surprisingly, the inventors of the present application have found that by using such a softener composition, it is possible to achieve an improvement in softness and an increase in the coating amount without compromising the strength of the paper. In particular, the coating amount of the softener composition can be increased to an amount of more than 20% based on the basis weight of the paper without adding an additive that increases viscosity, such as a thickener.

[0011] In addition, the softener composition of the present invention uses a combination of aminopolysiloxane and monohydroxy or polyhydric alcohol in a specific ratio, and the improvement of softness under the synergistic effect of the two components is more effective than that of a single polysiloxane system or a single alcohol system. Further, the softener composition of the present invention can make the paper treated by it still maintain good water absorption, not easy to turn yellow and have good skin affinity.

[0012] In another aspect, the present application also relates to a method for processing paper.

[0013] Finally, the present application relates to a paper product obtainable according to the above-described method. DETAILED DESCRIPTION OF THE INVENTION

[0015] Aminopolysiloxane (also commonly referred to as aminosilicone oil) is known as a softener for paper treatment. Such amino-modified organosilicon compounds are polysiloxanes with amino groups in their side chains or terminal groups. Since the oxygen atoms in the silicon-oxygen bonds in the main chain are adsorbed on the fiber surface, the hydrophobic groups can be oriented along the surface of the paper fiber, thereby forming a hydrophobic and retractable continuous film thereon, making the paper softer. However, conventional aminopolydimethylsiloxane is irritating to the skin and eyes, and the paper treated with it tends to turn yellow under high temperature and external conditions, which reduces the shelf life of the treated paper. Due to the water repellency of the polysiloxane film, the water absorption performance of the treated paper will be significantly reduced.

[0016] However, the inventors of the present application have found that when a specific aminopolysiloxane as described below is used and combined with a monohydric or polyhydric alcohol, particularly a polyol compound such as glycerol, further significant improvement in softness and a substantial increase in coating amount can be achieved while maintaining or even improving mechanical properties. In addition, the treated paper retains the water absorption of the base paper, and the treated paper towel is not prone to yellowing and discoloration and has good skin affinity.

[0017] Therefore, the softener composition according to the present invention comprises, based on the total weight of the composition:

[0018] - 0.1-20% by weight, preferably 0.5-15% by weight, more preferably 1.0-10% by weight of an aminopolysiloxane of the following formula (I);

[0019]

[0020] in

[0021] p and r are numbers greater than or equal to 0;

[0022] q is a number greater than 0, preferably 1-40; and preferably the sum of p+r+q is greater than or equal to 5;

[0023] R represents a straight-chain or branched alkyl or alkoxy group having 1 to 12, preferably 1 to 6, carbon atoms or represents a hydroxyl group;

[0024] R1 represents a linear or branched alkyl or alkoxy group having 1 to 18, preferably 1 to 12, more preferably 1 to 8 carbon atoms, or represents a hydroxyl group,

[0025] R2 represents a linear or branched alkylene group having 1 to 18, preferably 2 to 12 carbon atoms;

[0026] R3 represents a hydrogen atom or a linear or branched alkyl group having 1 to 18, preferably 2 to 12 carbon atoms;

[0027] Z represents -O- or -NR8-, wherein R8 has the same meaning as R3; and

[0028] - 10-80% by weight, preferably 20-75% by weight, more preferably 25-75% by weight of monohydric or polyhydric alcohol;

[0029] Wherein, the weight ratio of the aminopolysiloxane to the monohydroxy or polyhydroxy alcohol is 0.2-0.001.

[0030] In an advantageous embodiment according to the present invention, the preferred aminopolysiloxanes of formula (I) satisfy at least one of the following conditions:

[0031] p and r are each independently 1-1000, such as 2-800; q is 1-30; the sum of p+r+q is 10-2000, more preferably 100-1600; R and R1 independently represent methyl, ethyl, propyl, methoxy, ethoxy or hydroxy; R2 represents ethylene, propylene, butylene, pentylene or hexylene; R3 represents a hydrogen atom or a straight chain or branched alkyl group having 1 to 6 carbon atoms, such as methyl, ethyl or propyl; and / or Z represents -O- or -NR8-, wherein R8 is a hydrogen atom or a straight chain or branched alkyl group having 1 to 6 carbon atoms, such as methyl, ethyl or propyl.

[0032] In a more preferred embodiment, in the aminopolysiloxane of formula (I), R and R1 are independently selected from methyl, ethyl, methoxy or hydroxy, more preferably methyl; R2 represents ethylene, propylene or butylene, more preferably propylene; Z represents -O-; and / or R3 represents a hydrogen atom.

[0033] The aminopolysiloxane of formula (I) according to the present invention can be prepared from the organosiloxane compound of the following formula (II):

[0034]

[0035] wherein p, q, r, R and R1 have the corresponding meanings given above for the compounds of formula (I). In this context, it is preferred that at least one radical R1 is CH3 in the compounds of formula (II) used as starting materials.

[0036] Such compounds of formula (II) are readily commercially available.

[0037] The hydrogen atom of compound (II) is replaced by a group of formula (III)

[0038]

[0039] The substitution with radicals R1 can be achieved by reacting the organosiloxane (II) with a compound having a vinyl double bond which readily undergoes a hydrosilylation reaction in the presence of a catalyst.

[0040] Such a compound would therefore be an unsaturated precursor of group (III) or of group R1.

[0041] Specific non-limiting examples of unsaturated precursors of R1 are 1-octene, 1-dodecene and 1-octadecene.

[0042] Specific non-limiting examples of precursors of the group of formula (III) are 1-allyloxy-2,2,6,6-tetramethylpiperidine, 4-allyloxy-1,2,2,6,6-pentamethylpiperidine and 2,2,6,6-tetramethyl-4-piperidinyl undecenoate.

[0043] It is also possible to form the following structural unit by subjecting a precursor of a group R2 containing a vinyl double bond to hydrosilylation on the ≡SiH moiety and then carrying out a second reaction on this R2 precursor to introduce thereon a 2,2,6,6-tetramethyl-4-piperidinyl group:

[0044]

[0045] The synthetic routes of different compounds of formula (I) of the present invention can be various and are not limited here. For example, those skilled in the art can refer to and modify the synthetic method of piperidinyl organosiloxane described in US5721297A of the prior art to obtain compounds of formula (I) with desired structures. The entire contents of US5721297A are incorporated herein by reference.

[0046] The aminopolysiloxane of formula (I) particularly suitable for the present invention is commercially available as BLUESIL FLD21650, BLUESIL FLD 21653, BLUESIL FLD 21654 and the like.

[0047] In particular, the inventors of the present application have found that when the aminopolysiloxane of formula (I) of the present invention is included in the composition, in addition to maintaining the mechanical properties intact and achieving further significant improvement in softness, the aminopolysiloxane of formula (I) can lead to better water absorption and improved anti-yellowing properties of the treated paper compared to other commonly used aminosilicone oils, and in particular can also bring good skin affinity. Therefore, it is preferred that the composition of the present invention only contains the aminopolysiloxane of formula (I) as the organosilicon component, and the content of other organosilicon compounds (especially other aminopolysiloxanes) does not exceed 5% by weight, preferably does not exceed 2% by weight, more preferably does not exceed 1% by weight, and particularly preferably does not exceed 0.5% by weight, based on the total weight of the composition.

[0048] As a further component of the softener composition according to the invention, monohydric or polyhydric alcohol compounds are used. Suitable monohydric or polyhydric alcohols within the scope of the present invention are understood to be compounds having one or more hydroxyl groups per molecule, preferably aliphatic alcohols or polyether alcohols.

[0049] In an advantageous embodiment, suitable monohydric or polyhydric alcohol compounds may have the formula A-(OH) z ,

[0050] wherein z represents an integer from 1 to 6, preferably from 1 to 4, more preferably from 2 to 3;

[0051] A represents an aliphatic group such as an alkyl group having 1 to 12 carbon atoms, preferably 2 to 8 carbon atoms, more preferably 3 to 8 carbon atoms, or represents a polyether segment having a molecular weight of 40-1600.

[0052] Preferably, the polyether segment is an aliphatic polyether segment, preferably selected from segments having 4 to 25 polyoxyethylene and / or polyoxypropylene groups.

[0053] Here, the position of the hydroxyl group is not limited, and it may be at the end of the group A or at the side.

[0054] Preferably, examples of monohydroxy or polyhydroxy alcohol compounds according to the present invention include ethanol, propanol, butanol, pentanol, hexanol, heptanol, octanol, ethylene glycol, propylene glycol, glycerol, diethylene glycol, trimethylolpropane, hexylene glycol, polyether polyols such as polyoxyethylene or polyoxypropylene diols or triols, etc. Preferably, the monohydroxy or polyhydroxy alcohol compound is selected from ethylene glycol, trimethylolpropane, propylene glycol and / or glycerol. The inventors of the present application have found that if glycerol (glycerol) is used as the monohydroxy or polyhydroxy alcohol component in the composition, this can make the paper after treatment have better softness, smoothness and moisture retention.

[0055] Therefore, in a particularly preferred embodiment, the monohydric or polyhydric alcohol component comprises at least 95% by weight, preferably at least 98% by weight, more preferably at least 99% by weight, particularly preferably 99.5% by weight or even 100% by weight of glycerol.

[0056] In addition, in order to achieve the above-mentioned effects of the present invention, the weight ratio of the aminopolysiloxane to the polyol component must be in the range of 0.001-0.2. If the weight ratio is outside this range, the feel of the treated paper will be deteriorated and the moisturizing performance will be reduced, and its mechanical properties and coating amount may even be affected. Advantageously, the weight ratio of the aminopolysiloxane to the monohydroxy or polyhydroxy alcohol is controlled in the range of 0.001-0.2, preferably 0.002-0.15, more preferably 0.005-0.10, and particularly preferably 0.01-0.08. Within the most preferred range and preferably in combination with the substantial use of glycerol as the monohydroxy or polyhydroxy alcohol component, the treated paper can exhibit the best comprehensive properties.

[0057] In addition, in an advantageous embodiment, an emulsifier may also be included in the softener composition according to the present invention to form a stable emulsion, which is conducive to the coating of paper. Such emulsifiers may be nonionic emulsifiers and cationic emulsifiers. Examples of suitable nonionic emulsifiers include polyoxyethylene ethers of fatty alcohols, such as polyoxyethylene ethers with 4-50 oxyalkylene units, sorbitol esters, etc., such as polyoxyethylene lauryl ether, polyethylene sorbitol ether, polyoxyethylene glycerol ether, and isomeric tridecanol polyoxyethylene ethers, etc. Examples of cationic emulsifiers are quaternary ammonium salt emulsifiers, such as alkyl trimethyl ammonium chloride, dialkyl dimethyl ammonium chloride, and alkyl benzyl dimethyl ammonium chloride.

[0058] The viscosity of the composition usually has a great influence on the amount of liquid (i.e., the coating amount). If the viscosity is too low, the coating composition is not conducive to adhering to the surface of the coating roller, and if the viscosity is too high, the fluidity is too poor, which makes the coating uniformity worse. Therefore, a certain amount of thickener is usually added to the softener composition in the prior art to adjust the viscosity. However, the addition of thickener will affect the feel of the paper product and the bacterial stability of the formula. Therefore, in the present invention, the composition preferably contains less than 0.1% by weight, more preferably less than 0.05% by weight, and most preferably does not contain thickener at all. Such thickeners are such as polyacrylic acid, cellulose, alginates and guar gum thickeners.

[0059] In addition to the above-mentioned components, the softener composition according to the present invention may also contain other additives, such as 0.01-0.3 wt% of an acid for adjusting pH, such as citric acid, phosphoric acid, acetic acid, lactic acid, hydrochloric acid, etc. and 0.01-0.1 wt% of a fragrance for adjusting odor. Within the scope of the present invention, it is preferred to add the acid for adjusting pH, so as to further make the treated paper milder to the skin, and also to improve the emulsion stability of the composition.

[0060] Typically, in the present invention, in addition to the aminopolysiloxane of formula (I) and the monohydroxy or polyhydric alcohol and necessary water, the amount of other additives contained in the composition does not exceed 20% by weight, preferably less than 15% by weight or less than 10% by weight, more preferably less than 5% by weight or 1% by weight or 0.5% by weight or 0.1% by weight.

[0061] In a preferred embodiment, the composition is an emulsion.

[0062] In another preferred embodiment, the composition comprises 20 wt % to 88 wt %, such as 30 wt % to 70 wt % or 35 wt % to 60 wt % of water, based on the total weight of the composition.

[0063] The second aspect of the present invention relates to a method for preparing the softener composition.

[0064] The softener compositions according to the invention can be formulated in a simple manner by mixing the individual components with one another in the indicated amounts and stirring thoroughly to form a stable emulsion.

[0065] In another aspect, the present application also relates to a method for softening paper. The treatment method is a post-finishing method, such as spraying, roller coating, printing, etc. For example, the softener composition according to the present invention can be directly applied to the surface of the paper product to be treated by the above method, and can be applied during the paper product rolling or rewinding process or other processes.

[0066] In an advantageous embodiment of paper softening treatment, the softener composition as described above is applied to the paper surface in an amount higher than 20%, preferably 25-35%, based on the basis weight of the paper. Preferably, after coating, 0.01 g / m2 of the paper surface is distributed. 2 -3.2g / m 2 , preferably 0.04-2g / m 2 Aminopolysiloxane and 0.5-9g / m 2 , preferably 1-9g / m 2 of hydroxyl groups.

[0067] Finally, the present application relates to a paper product obtainable according to the above-described method. Example

[0068] 1. Partial list of raw materials

[0069]

[0070]

[0071] 2. Preparation of emulsion

[0072] The components except the alcohol component in the examples listed in Table 1 below were uniformly mixed in the amounts shown, and then a small amount of water was added and stirred at high speed until the phase was completely inverted. The remaining water was then slowly added and mixed at 300 rpm for 10 minutes. Finally, the alcohol component (i.e., glycerol and / or 1,2PG) was added and stirred at 200 rpm for 1 hour at 40°C. Examples 1 and 8 are comparative examples.

[0073] In addition, Example 4 was repeated to prepare Comparative Example 10, except that the organic silicone oil used in Example 4 was replaced with a common amino silicone oil (Bluesil Ecosoft C803). The softener compositions prepared in these two examples were then tested for paper water absorption, whiteness reduction rate and skin affinity as described below, and the results are listed in Table 3.

[0074] 3. Testing

[0075] (1) Spraying amount:

[0076] a) Pour the prepared paper towel softener into a high-pressure spray gun and adjust the spray particle size and spray amount.

[0077] b) Weigh the weight of the paper towel to be treated and record it as W0.

[0078] c) Fix the paper towel to be treated on the spraying panel and spray the softener evenly; perform the same treatment on the other surface of the paper towel.

[0079] d) Weigh the weight of the sprayed paper towel and record it as W1.

[0080] e) Calculate the spraying amount W according to the following formula.

[0081]

[0082] f) Repeat the above steps to prepare at least 10 treated paper towels for each sample.

[0083] g) Divide the above paper towels into two groups, store one group in a ziplock bag, and place the other group in a specified temperature and humidity for equilibrium (humidity 70-80%, room temperature 20°C for 12 hours).

[0084] (2) Paper performance

[0085] (i) Sensory testing

[0086] A panel of five or more experts who have received professional training in this experiment was formed to conduct a subjective evaluation of the experiment. Each evaluator touched the treated paper towel and scored the softness of the differently treated paper towels from the softest to the least soft. Similar operations were used to evaluate the slipperiness and wet feel of the paper towel. For each property, the sample with the worst touch feeling was scored as 1, and the best was scored as 5.

[0087] The test results for all evaluators and all samples are listed in the table, and the average value of each performance is calculated. The higher the value, the better the softness, slipperiness or wet feeling.

[0088] The test data of all the above properties are listed in Table 2 below.

[0089] (ii) Water absorption test of paper towels

[0090] a) Spread the treated paper towel flat on the table.

[0091] b) Use a standard dropper to drop a drop of water onto the paper towel. The water drop spreads on the paper towel until it stops spreading. Record the time it takes to completely spread.

[0092] c) Repeat the operation for more than 5 times and take the average value (in seconds).

[0093] The higher the value, the worse the water absorption.

[0094] (iii) Paper towel whiteness test

[0095] a) Fold the paper towel in half twice to get 4 paper sides. Use a colorimeter to test the whiteness values ​​of the 4 paper sides. Perform the same operation on the other side of the paper towel. Take the average whiteness value M0 of the 8 sides.

[0096] b) Heat the paper towel at 170°C for 2 minutes, remove it and leave it at room temperature for 2 hours.

[0097] c) Testing the whiteness value M1 of the baked paper towel according to step a).

[0098] d) According to the formula Calculate the whiteness reduction rate M of the paper towel. The smaller M is, the better the anti-yellowing property is.

[0099] (iv) Skin affinity test of paper

[0100] The products were tested according to the procedures described in the Cosmetic Hygiene Standards (Ministry of Health, 2007) (GB7919-87 Procedures and Methods for Cosmetic Safety Evaluation), and skin affinity was evaluated mainly based on the results of skin irritation tests, skin allergy tests, and skin phototoxicity tests. Good affinity was defined as no irritation, allergy, or phototoxicity.

[0101] Table 1 Composition of the compositions prepared in each embodiment (unless otherwise specified, the data in the table are in parts by weight)

[0102]

[0103] Table 2 Spraying amount and paper performance test results

[0104]

[0105]

[0106] Table 3 Comparison of water absorption, whiteness reduction rate and skin affinity of paper

[0107]

[0108] The above content is an exemplary description of the present invention, and the specific implementation of the present invention cannot be considered to be limited to this. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without spending creative labor falls within the protection scope of the present invention.

Claims

1. A method for processing paper, comprising the following steps: The softener composition is applied to the surface of the paper in an amount higher than 20% based on the basis weight of the paper, The softener composition, which is an emulsion and comprises, based on the total weight of the composition: - 1.0-10% by weight of an aminopolysiloxane of the following formula (I); in p and r are numbers greater than or equal to 0; q is a number greater than 0; R represents a linear or branched alkyl or alkoxy group having 1 to 12 carbon atoms or represents a hydroxyl group; R1 represents a linear or branched alkyl or alkoxy group having 1 to 18 carbon atoms or represents a hydroxyl group, R2 represents a linear or branched alkylene group having 1 to 18 carbon atoms; R3 represents a hydrogen atom or a straight or branched alkyl group having 1 to 18 carbon atoms; Z represents -O-; and - 25-75% by weight of glycerol; wherein the weight ratio of the aminopolysiloxane to glycerol is 0.01-0.08, and the softener composition contains only the aminopolysiloxane of formula (I) as the silicone component; and The composition comprises less than 0.05% by weight of a thickener.

2. A paper product treated with a softener composition, wherein the softener composition is applied to the surface of the paper in an amount greater than 20% by weight of the paper, The softener composition, which is an emulsion and comprises, based on the total weight of the composition: - 1.0-10% by weight of an aminopolysiloxane of the following formula (I); in p and r are numbers greater than or equal to 0; q is a number greater than 0; R represents a linear or branched alkyl or alkoxy group having 1 to 12 carbon atoms or represents a hydroxyl group; R1 represents a linear or branched alkyl or alkoxy group having 1 to 18 carbon atoms or represents a hydroxyl group, R2 represents a linear or branched alkylene group having 1 to 18 carbon atoms; R3 represents a hydrogen atom or a linear or branched alkyl group having 1 to 18 carbon atoms; Z means -O-; and - 25-75% by weight of glycerol; wherein the weight ratio of the aminopolysiloxane to glycerol is 0.01-0.08, and the softener composition contains only the aminopolysiloxane of formula (I) as the silicone component; and The composition comprises less than 0.05% by weight of a thickener.

3. The method according to claim 1 or the paper product according to claim 2, characterized in that q is a number from 1 to 40.

4. The method according to claim 1 or the paper product according to claim 2, characterized in that The sum of p+r+q is greater than or equal to 5.

5. The method according to claim 1 or the paper product according to claim 2, characterized in that R represents a linear or branched alkyl or alkoxy group having 1 to 6 carbon atoms.

6. The method according to claim 1 or the paper product according to claim 2, characterized in that R1 represents a linear or branched alkyl or alkoxy group having 1 to 12 carbon atoms.

7. The method according to claim 1 or the paper product according to claim 2, characterized in that R1 represents a linear or branched alkyl or alkoxy group having 1 to 8 carbon atoms.

8. The method according to claim 1 or the paper product according to claim 2, characterized in that R2 represents a linear or branched alkylene group having 2 to 12 carbon atoms.

9. The method according to claim 1 or the paper product according to claim 2, characterized in that R3 represents a hydrogen atom or a linear or branched alkyl group having 2 to 12 carbon atoms.

10. The method according to claim 1 or the paper product according to claim 2, characterized in that The aminopolysiloxane of formula (I) satisfies at least one of the following conditions: p and r are each independently 1-1000; q is 1-30; the sum of p+r+q is 10-2000; R and R1 independently represent methyl, ethyl, propyl, methoxy, ethoxy or hydroxy; R2 represents ethylene, propylene, butylene, pentylene or hexylene; and / or R3 represents a hydrogen atom or a straight or branched alkyl group having 1 to 6 carbon atoms.

11. The method or paper product according to claim 10, characterized in that p and r are each independently 2-800.

12. The method or paper product according to claim 10, characterized in that The sum of p+r+q is 100-1600.

13. The method or paper product according to claim 10, characterized in that R3 represents a methyl group, an ethyl group or a propyl group.

14. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that In the aminopolysiloxane of formula (I), R and R1 are independently selected from methyl, ethyl, methoxy or hydroxy; R2 represents ethylene, propylene or butylene; Z represents -O-; and / or R3 represents a hydrogen atom.

15. The method or paper product according to claim 14, characterized in that R and R1 are independently selected from methyl.

16. The method or paper product according to claim 14, characterized in that R2 represents a propylene group.

17. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that The composition contains no thickeners at all.

18. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that The thickener is selected from polyacrylic acid, cellulose, alginate and guar gum thickeners.

19. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that The composition comprises 0.01-0.3 wt % of an acid for adjusting pH.

20. The method or paper product according to claim 19, characterized in that The acid used to adjust pH is citric acid, phosphoric acid, acetic acid, lactic acid or hydrochloric acid.

21. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that In addition to the aminopolysiloxane of formula (I), glycerol and water, the amount of other additives contained in the composition does not exceed 20% by weight.

22. The method or paper product according to claim 21, characterized in that The composition contains other additives in an amount of less than 15% by weight.

23. The method or paper product according to claim 21, characterized in that The amount of other additives included in the composition is less than 10% by weight.

24. The method or paper product according to claim 21, characterized in that The amount of other additives included in the composition is less than 5% by weight.

25. The method or paper product according to claim 21, characterized in that The amount of other additives included in the composition does not exceed 1% by weight.

26. The method or paper product according to claim 21, characterized in that The amount of other additives included in the composition does not exceed 0.5% by weight.

27. The method or paper product according to claim 21, characterized in that The amount of other additives included in the composition does not exceed 0.1% by weight.

28. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that The composition comprises 20 wt % to 88 wt % of water based on the total weight of the composition.

29. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that The composition comprises 30 wt % to 70 wt % of water based on the total weight of the composition.

30. The method or paper product according to any one of the preceding claims 1 to 9, characterized in that The composition comprises 35 wt % to 60 wt % of water based on the total weight of the composition.

31. The method of claim 1 or the paper product of claim 2, characterized in that The softener composition is coated on the surface of paper in an amount of 25%-35% based on the basis weight of the paper.

32. The method of claim 1 or the paper product of claim 2, wherein: The softener composition is rolled or sprayed on the surface of paper.

33. The method of claim 1 or the paper product of claim 2, wherein: After coating, the surface of each square meter of paper has a distribution of 0.01g / m 2 -3.2g / m 2 Aminopolysiloxane and 0.5-9g / m 2 of hydroxyl groups.

34. The method of claim 1 or the paper product of claim 2, wherein: After coating, the surface of each square meter of paper has 0.04-2g / m 2 of aminopolysiloxane.

35. The method of claim 1 or the paper product of claim 2, wherein: After coating, the surface distribution of each square meter of paper is 1-9g / m 2 of hydroxyl groups.

Images