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Resorcinol formaldehyde rubber latex modified by alkyl phenol and method for preparing same

A technology of resorcinol formaldehyde and rubber latex, which is applied in the field of chemical surface treatment agents, can solve the problems that the glass fiber mechanical properties of the resorcinol formaldehyde rubber film are greatly lost, cannot meet the needs of use, etc. Bond density, prevent the intrusion of water vapor, and reduce the effect of cracking

Inactive Publication Date: 2008-10-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in high temperature and humid environments, the mechanical properties of glass fibers coated with resorcinol formaldehyde rubber film will suffer a great loss, and even cannot meet the needs of use in a short period of time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Preparation of ARFL latex

[0025] Step 1: Weigh 6.3 grams of resorcinol and 1.4 grams of nonylphenol into a thermostat reactor, dissolve them with a mixture of 83 grams of soft water and absolute ethanol (mass ratio 5:5), and add sodium hydroxide 4 After stirring evenly, weigh 5.3 grams of 37% formaldehyde and add it to the above reaction vessel. After stirring evenly, react at 5°C for 6 hours under continuous stirring to obtain pre-condensed ARF resin for use;

[0026] Step 2: According to the solid mass ratio of 5:4:1, weigh the butadiene pyridine latex, neoprene latex and carboxyl styrene butadiene latex latex, mix and stir to obtain the mixed latex (the total solid mass is 100 g), and the first step is to obtain Add the pre-condensed ARF resin to the above-mentioned mixed latex under sufficient stirring, and stir evenly;

[0027] Step 3: React at 5°C for 20h to obtain ARFL copolymer latex. The glass fiber coated with this ARFL copolymer latex has a strength r...

Embodiment 2

[0028] Example 2 Preparation of ARFL latex

[0029] Step 1: Weigh 5.6 grams of resorcinol and 2.0 grams of nonylphenol, put them in a constant temperature reactor and dissolve them with a mixture of 86 grams of soft water and absolute ethanol (mass ratio 6:4). After dissolving them, add hydrogen 0.6 g of sodium oxide, after stirring evenly, weigh 5.8 g of 37% formaldehyde into the above reaction vessel, after stirring evenly, react at 30°C for 4 hours under continuous stirring to obtain pre-condensed ARF resin for use;

[0030] Step 2: According to the solid mass ratio of 6:4:0, respectively weigh the butadiene-butadiene latex, neoprene latex or acrylate latex or natural rubber latex or chlorosulfonated polyethylene latex or hydrogenated nitrile latex and mix them thoroughly to obtain a mixed latex (Total solid mass is 50 grams), add the pre-condensed ARF resin obtained in the first step to the above-mentioned mixed latex with sufficient stirring, and stir evenly;

[0031]Step 3: ...

Embodiment 3

[0032] Example 3 Preparation of ARFL latex

[0033] Step 1: Weigh 4.8 grams of resorcinol, put 0.5 grams of nonylphenol into a thermostat reactor, disperse it evenly with soft water under continuous stirring, add 0.6 grams of sodium hydroxide and 2.8 grams of 37% formaldehyde, soft water The dosage is 91.3 grams. After stirring evenly, react at 15°C for 5 hours under continuous stirring to obtain the pre-condensed ARF resin for use;

[0034] Step 2: According to the solid mass ratio of 5:3:2, weigh the butadiene pyridine latex, neoprene latex and acrylate latex respectively, mix and stir to obtain the mixed latex (the total solid mass is 60 grams), The condensed ARF resin is added to the above-mentioned mixed latex under sufficient stirring;

[0035] Step 3: Weigh 1.2 g of 37% formaldehyde, dilute it with water 10 times, add it to the mixed latex with the ARF resin added in the above step 2 with sufficient stirring, and stir evenly. React for 48 hours at 15°C to obtain ARFL copoly...

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PUM

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Abstract

The invention discloses an alkylphenol-modified resorcinol-formaldehyde rubber latex. The latex is prepared by alkylphenol, resorcinol, formaldehyde and mixed latex according to certain mass proportion; the preparation method is as follows: the resorcinol and the alkylphenol are placed into a reactor, mixed liquid with soft water and absolute ethyl alcohol is added into the reactor to dissolve the resorcinol and the alkylphenol, then basic catalyst is added, the mixture is stirred and dripped with formaldehyde solution to obtain precondensed alkylphenol- resorcinol- formaldehyde resin (namely ARF resin), and then the ARF resin is added into the mixed latex to constantly stir to obtain the alkylphenol-modified resorcinol-formaldehyde rubber latex (ARFL latex). The latex has good hydrophobic nature; and under high temperature and humidity environment, the strength retention rate of glass fiber coated by the latex of the invention is improved by 5 to 20 percent than the prior RFL latex.

Description

1. Technical Field [0001] The invention relates to a chemical surface treatment agent for alkylphenol-modified resorcinol-formaldehyde rubber latex, in particular to a surface treatment agent for reinforcing rubber fibers-alkylphenol-modified resorcinol-formaldehyde Rubber latex and its preparation method. 2. Background technology: [0002] In the known literature, resorcinol (R) and formaldehyde (F) have a molar ratio of R / F between 1 / 1 to 1 / 3 under alkali catalysis (TREATING AGENT FOR GLASS FIBER AND TREATING AGENT COATED GLASS FIBER CORDJP2003081662; Glass fiber cord for reinforcing a rubber EP0931774), acid catalyzed the synthesis of resorcinol formaldehyde (RF) resin at the R / F molar ratio of 1 / 0.5. In the literature 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, the RF resin is directly added to the rubber latex under stirring. After the time of copolymerization, it is fo...

Claims

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Application Information

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IPC IPC(8): C08L9/10C08L11/02C08L33/04C08L13/02C08L7/02C08L23/26C08L15/00C08L61/06C08G8/24C08K9/04C08J5/06C08L21/00
Inventor 申明霞张俊生周柏杰陈庆民
Owner NANJING UNIV
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