Water-resistant and high temperature-resistant polymer latex and preparation method thereof

A technology of high temperature resistant polymer and latex, applied in coating, paper coating, textile and papermaking, etc., can solve the problems of water resistance and high temperature resistance of finished paper, and achieve excellent water resistance and high temperature resistance. Effect

Inactive Publication Date: 2014-03-12
SHANGHAI QIANGSHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latex prepared by these methods can meet the latex requirements of coated paper and carpet backing, etc. However, when these latexes are used to produce latex impregnated paper, the water resistance and high temperature resistance of the finished paper cannot meet the requirements

Method used

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  • Water-resistant and high temperature-resistant polymer latex and preparation method thereof
  • Water-resistant and high temperature-resistant polymer latex and preparation method thereof
  • Water-resistant and high temperature-resistant polymer latex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 (in total monomer addition is 100wt%):

[0026] First vacuumize the 50L polymerization kettle, and then replace it with nitrogen. When the vacuum reaches -0.08MPa, add 70wt% of water, 0.4wt% of sodium lauryl sulfate, and 0.35wt of allyloxy fatty alcohol oxyethylene ether ammonium sulfate. %, potassium chloride 0.06wt%, sodium hydroxide 0.86wt%, methyl methacrylate 3wt%, styrene 12wt%, tertiary dodecyl mercaptan 0.3wt%, acrylic acid 2wt%, itaconic acid 1wt%, propylene Amide 1wt%, butadiene 10wt%, then start to stir and heat up to 70 degrees, add initiator ammonium persulfate 1.5wt% to maintain polymerization after 1 hour, with water 30wt%, sodium lauryl sulfate 0.3wt%, A mixture of 0.2wt% tertiary dodecyl mercaptan, 34wt% styrene, 0.5wt% anilinophenyl methacrylamide, 25wt% butadiene, and 12wt% methyl methacrylate was added continuously within 4 hours and then matured After 3 hours, the polymerization conversion rate reached over 98%. Add appropriate amount ...

Embodiment 2

[0027] Embodiment 2 (in total monomer addition is 100wt% meter)

[0028] First vacuumize the 50L polymerization kettle, and then replace it with nitrogen. When the vacuum reaches -0.08MPa, add 100wt% water, 1.0wt% sodium dodecyl aryl ether sulfonate, and 0.2wt% sodium dodecylbenzenesulfonate %, Sodium acrylamido isopropylsulfonate 0.4wt%, Potassium chloride 0.05wt%, Sodium hydroxide 0.2wt%, Butyl acrylate 8wt%, 2,2'-Butylidene bis(6-tert-butyl -4-methylphenol) 0.6wt%, styrene 36wt%, tertiary dodecyl mercaptan 0.5wt%, acrylic acid 3wt%, methyl methacrylate 20wt%, methylol acrylamide 1wt%, butadiene, 32wt%, then start to stir and heat up to 65 degrees, add initiator ammonium persulfate 1.0wt% polymerization reaction for 8 hours, the conversion rate is over 98%, add appropriate amount of potassium hydroxide and defoamer and other auxiliary agents to remove residual monomer Body, see Table 2 for latex technical indicators, and Table 3 for latex impregnated paper technical indicat...

Embodiment 3

[0029] Embodiment 3 (in total monomer addition is 100wt% meter)

[0030] First vacuumize the 50L polymerization kettle, and then replace it with nitrogen. When the vacuum reaches -0.08MPa, add 80wt% of water, 0.2wt% of sodium octadecyl sulfate, and 0.3wt of allyloxy fatty alcohol oxyethylene ether ammonium sulfate. %, potassium chloride 0.06wt%, sodium hydroxide 0.83wt%, a-methylstyrene 15wt%, tertiary dodecyl mercaptan 0.3wt%, acrylic acid 1.8wt%, acrylonitrile 8wt%, acrylamide 1.2wt% , butadiene 12wt%, then start to stir and heat up to 70 degrees, add initiator ammonium persulfate 1wt%, maintain polymerization reaction for 1 hour and then add water 20wt% continuously, sodium lauryl sulfate 0.5wt%, t-dodecyl Carbon mercaptan 0.2wt%, ammonium persulfate 0.2wt%, 2,2'-butylene bis(6-tert-butyl-4-methylphenol) 0.6wt%, styrene 32wt%, butadiene 30wt% The mixture continued to polymerize for 4 hours, and the polymerization conversion rate reached more than 98%. A proper amount of po...

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Abstract

The invention relates to water-resistant and high temperature-resistant polymer latex and a preparation method thereof. The latex provided by the invention mainly comprises the following polymerization monomers in percentage by weight: 0-80wt% of C5-C11 acrylic ester, 10-75wt% of C4-C5 aliphatic conjugated dienes, 15-80wt% of C8-C9 aromatic vinyl compounds, 0-10wt% of acrylonitrile, 1-5wt% of C3-C5 vinyl unsaturated carboxylic acid and 0.3-2.5wt% of C3-C4 unsaturated amide. The latex provided by the invention has proper particle size, viscosity and stability, and latex impregnated paper produced from the latex has excellent water resistance and high temperature resistance.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a latex and a preparation method thereof. Background technique [0002] Polymer latex is widely used in industries such as papermaking, carpet and construction. In the application process, the performance requirements of latex are getting higher and higher. In the production process of latex impregnated paper, in addition to the good process applicability of the latex, special requirements are put forward for the water resistance and temperature resistance of the latex polymer. [0003] Previous patents such as JP61-63795, CN1208737 and CN1427018 used more water-soluble unsaturated monomers such as functional monomers such as acrylic acid, acrylamide and N-methylol acrylamide when synthesizing latex and anion and nonionic composite emulsification system, a carboxyl latex with better stability was obtained. The latexes prepared by these methods can meet the latex requirements of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/12C08F212/08C08F236/10C08F236/06C08F220/14C08F220/06C08F220/56C08F222/02C08F2/26C08F220/60C08F220/58C08F220/18C08F212/12C08F212/10C08F220/48D21H19/20
Inventor 王保祥丁冠军宋亚宁
Owner SHANGHAI QIANGSHENG CHEM
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