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Montmorillonite/method bond-rubber copolymerized emulsion and preparing method

A technology of rubber copolymerization and copolymerization emulsion, which is applied in the field of surface treatment agents, can solve the problems of affecting the impregnation effect, deterioration of the impregnation effect, and reduced service life, so as to increase the safety of use and designability, and improve toughness and adhesion performance , Improve the effect of bending fatigue performance

Inactive Publication Date: 2010-04-14
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The latex synthesized by the above reaction can be used for fiber impregnation after 18 hours of aging, and generally can guarantee a storage time of 72 hours, but when the R / F is 1 / 1 to 1 / 3, the film obtained on the surface of glass fiber or organic fiber It is brittle and cannot meet the needs of enhancing the fatigue resistance of rubber products
Increasing the amount of formaldehyde can improve the mechanical properties of the RFL film, but it may cause the impregnation effect to deteriorate, especially for glass fibers, which will not only affect the impregnation effect between fiber bundles, but also reduce the adhesion with rubber and affect the reinforcement of rubber products. The bending fatigue performance will reduce the service life, and under high temperature and humidity conditions, such as the period from June to August in Nanjing, it will have a great impact on the mechanical properties of glass fiber ropes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, a kind of preparation method of sodium montmorillonite-phenolic-rubber copolymer emulsion, its preparation steps are as follows:

[0033] Step 1: Weigh 0.3 grams of sodium-based montmorillonite and put it into a reaction vessel, dissolve it with 87.0 grams of soft water, and after high-shear dispersion for half an hour, add 5.6 grams of resorcinol and 3.2 grams of 10% sodium hydroxide gram, mix well under continuous stirring, then add 3.9 grams of 37% formaldehyde and add it in the reaction vessel in a water bath at 5°C, after stirring evenly, when the pH value is reduced by 0.3, 100 grams of sodium montmorillonite resorcinol formaldehyde resin is obtained ,spare;

[0034] Step 2: the above-mentioned resorcinol formaldehyde resin is 10 / 100 according to the RF / L dry weight ratio, mixed latex, 37% formaldehyde 1.6 grams with butylpyridine latex, neoprene latex, acrylate latex 5: 4: 1 React with 1.5 grams of anti-aging agent WINGSTAY L for 20 hours to obtain...

Embodiment 2

[0036] Embodiment 2 A kind of preparation method of hydrophilic montmorillonite-phenolic-rubber copolymer emulsion

[0037] Step 1: in a reactor placed in a constant temperature water bath, put 5.8 grams of resorcinol, 5 grams of hydrophilic montmorillonite, after dissolving it with 81.3 grams of soft water, add 10% sodium hydroxide 4 gram, disperse under stirring for half an hour, then weigh 3.9 grams of 37% formaldehyde and add it to the above reaction vessel, after stirring evenly, when the pH value drops to 0.4, generally react for 4-6 hours under continuous stirring to obtain hydrophilic montmorillonite 100 grams of soil-modified resorcinol formaldehyde resin, standby;

[0038] Step 2: According to the ratio of 6:3:1, weigh the butylpyrrolate latex, chloroprene latex, and carboxylated styrene-butadiene latex respectively, and mix them evenly after diluting with water respectively to obtain the mixed latex L, which is 8 / 100 according to the mass ratio of RF / L ~25 / 100, mix...

Embodiment 3

[0040] Embodiment 3, a kind of preparation method of the organic montmorillonite phenolic-rubber copolymer emulsion of water dispersion, concrete preparation steps are as follows:

[0041] Step 1: Weigh 0.5 grams of sodium-based montmorillonite, 1.0 grams of amide-containing long-chain modifier and place them in a constant temperature reactor, dissolve them fully with 85.3 grams of soft water, weigh 6.7 grams of resorcinol and place them in the reactor In, add 3 grams of 10% sodium hydroxide then, while fully stirring, be 1 / 0.7 ratio dripping 3.5 grams of 37% formaldehyde solution by resorcinol / formaldehyde (R / F) mol ratio, control the concentration of RF resin At 8%, control the reaction temperature at 25 ± 1 ° C, control the pH value of the RF resin to decrease at 0.4, and the reaction time is about 6 hours to obtain 100 grams of resorcinol formaldehyde resin modified by montmorillonite;

[0042] Step 2: according to the ratio of 7: 2: 1, successively weigh butylpyridine lat...

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PUM

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Abstract

A kind of montmorillonite / phenolic aldehyde-rubber copolymer emulsion, is prepared by the copolymerization of montmorillonite, resorcin-formaldehyde resin, mixed latex, formaldehyde and antioxidant, specifically, the montmorillonite includes sodium montmorillonite, hydrophilic montmorillonite and organic montmorillonite; the preparation method is: montmorillonite is firstly distributed with water,adding resorcinol, sodium hydroxide and formaldehyde respectively, the montmorillonite resorcin-formaldehyde resin(RF) can be acquired; next, after RF and mixed latex are even mixed, antioxidant is added and even mixed; finally, formaldehyde is diluted with water and added into the mixed latex prepared in Step 2 under stirring, after being reacted under normal temperature, the montmorillonite / phenolic aldehyde-rubber copolymer emulsion can be acquired. The emulsion which can be used as the surface treatment agent of fiber material, can improve the moisture and heat resistance of fiber surfaceand the bending fatigue property of glass fiber.

Description

1. Technical field [0001] The invention relates to a chemical surface treatment agent, in particular to a surface treatment agent for reinforcing fibers for rubber—montmorillonite intercalated phenolic-rubber copolymer emulsion and a preparation method thereof. 2. Background technology: [0002] In the known literature, the R / F molar ratio of resorcinol and formaldehyde is between 1 / 1 and 1 / 3 under the condition of base catalysis (TREATING AGENT FOR GLASS FIBER AND TREATING AGENT COATED GLASS FIBER CORDJP2003081662; Glass fiber cord for reinforcing a rubber EP0931774), acid catalyzed when the R / F molar ratio is 1 / 0.5, synthetic RF resin. In the document Treating agent, cord for rubber reinforcement, and rubber product, the R / F molar ratio range is limited to 1 / 0.5~1 / 3. After the reaction is completed, it is directly added to the rubber latex under stirring, and after a certain curing time Finally, it is formulated into a fiber surface treatment solution, which is directly u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08L61/06C08G8/10C08K3/34C08L9/00C08L33/08C08L7/00C08L23/26
Inventor 申明霞陈庆民
Owner NANJING UNIV
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