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Aromatic modified polyvinyl acetate emulsion adhesive for pencils and preparation method thereof

A polyvinyl acetate, aromatic type technology, applied in the direction of monocarboxylate copolymer adhesives, adhesive additives, adhesive types, etc., can solve poor mechanical stability, temperature resistance needs to be improved, brittle quality Easy to crack and other problems, to achieve the effect of not easy to slip core, good dimensional stability, and even heating

Inactive Publication Date: 2015-10-14
安徽雪峰木业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Adhesives are needed in the pencil making process, and its function is to bond the pencil lead to the pencil sheet. Most of the adhesives used in products on the market are polyvinyl acetate emulsion adhesives. This adhesive The raw materials are cheap, easy to use, non-toxic and harmless, and the bonding strength is relatively high. However, there are also some shortcomings. When vinyl acetate emulsion adhesives are applied to pencils, problems such as easy core slipping, broken cores, glue opening, and difficulty in cutting will directly affect the quality of products. Therefore, the development of high-efficiency and high-quality adhesives is crucial to improving the quality of pencils. important link

Method used

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Embodiment

[0012] The adhesive of this embodiment is made of the following raw materials in parts by weight: vinyl acetate 52, acrylic acid 13, methyl acrylate 6, nanometer calcium carbonate 7, potassium persulfate 0.3, OP-10 3.5, natural fragrance 0.2, poly Methylsiloxane 1.4, guar gum 9, sodium lauryl sulfate 1.8, deionized water 200, 10% sodium hydroxide solution, acetic acid solution, and ammonia water.

[0013] The preparation method of this adhesive is:

[0014] (1) First put guar gum and sodium lauryl sulfate into 35 parts by weight of deionized water, heat to 75°C, stir at high speed to dissolve completely, then add 10% sodium hydroxide solution, and adjust the pH value of the solution to 9.8 , continue to stir and mix evenly, add polydimethylsiloxane, continue to stir and mix for 60 minutes, then cool to 58°C, add dropwise acetic acid to adjust the pH of the solution to 7.8, and obtain a modified guar gum solution for later use;

[0015] (2) Mix the modified guar gum solution p...

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Abstract

The invention relates to the field of a polyvinyl acetate emulsion adhesive, specifically to an aromatic modified polyvinyl acetate emulsion adhesive for pencils and a preparation method thereof. According to the preparation method of the adhesive, polymeric monomers such as vinyl acetate, acrylic acid and methyl acrylate, etc. react in nitrogen atmosphere and under the water-bath condition such that polymerization efficiency is higher; and a modified guar gum solution and a nano-calcium carbonate powder are added during the reaction process. Thus, water resistance of the prepared product is improved in comparison with a traditional polyvinyl acetate emulsion adhesive; mechanical property is excellent; and the prepared adhesive has good bond force on timber and graphite cores. Meanwhile, the adhesive has a certain toughness and good dimensional stability, and is not easy to cause slipping and fracture of cores.

Description

technical field [0001] The invention relates to the field of polyvinyl acetate emulsion adhesives, in particular to an aromatic-type modified polyvinyl acetate emulsion adhesive for pencils and a preparation method thereof. Background technique [0002] Adhesives are needed in the pencil making process, and its function is to bond the pencil lead to the pencil sheet. Most of the adhesives used in products on the market are polyvinyl acetate emulsion adhesives. This adhesive The raw materials are cheap, easy to use, non-toxic and harmless, and the bonding strength is relatively high. However, there are also some shortcomings. When vinyl acetate emulsion adhesives are applied to pencils, problems such as easy core slipping, broken cores, glue opening, and difficulty in cutting will directly affect the quality of products. Therefore, the development of high-efficiency and high-quality adhesives is crucial to improving the quality of pencils. important link. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J11/08C09J11/04C08F218/08C08F220/06C08F220/14
Inventor 娄森良商亚超
Owner 安徽雪峰木业有限公司
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