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Plastic polyvinyl alcohol (PVA) resin and preparation method thereof

A plastic and resin technology, applied in the field of plastic PVA resin and its preparation, can solve the problems of poor stability of PVA resin affecting continuous production, and achieve the effects of reducing the generation of insoluble matter, overcoming softening, and reducing crystallinity

Inactive Publication Date: 2013-09-11
包头市恒瑞新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention will solve the technical problem that the poor stability of existing PVA resin affects continuous production; and provide plastic PVA resin and its preparation method

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific embodiment one: In this embodiment, the plastic PVA resin is composed of 50-90 parts of polyvinyl alcohol, 15-45 parts of plasticizer, 0.05-2 parts of surfactant, 0.01-15 parts of heat stabilizer, 0.01-1.5 parts of anti-hydrolysis agent, 0.5-3 parts of siloxane powder, 0.05-5 parts of lubricant, 0.01-0.5 parts of melt index regulator (Dongguan Plastic Technology Co., Ltd.), 0.05-5 parts of antioxidant Made with 0-90 parts of starch.

specific Embodiment approach 2

[0017] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the plastic PVA resin consists of 55-85 parts of polyvinyl alcohol, 20-40 parts of plasticizer, 0.1-1 part of surfactant, 0.1-5 parts of heat stabilizer, 0.05-1.0 parts of anti-hydrolysis agent, 0.5-1.5 parts of siloxane powder, 0.1-3.5 parts of lubricant, 0.05-0.1 part of melt index regulator, 0.2-4 parts of antioxidant and Made from 10 to 80 parts of starch.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the polyvinyl alcohol is selected from alcoholysis degree 80% ~ 98%, viscosity 20mpa.s ~ 44mpa.s, volatile content ≤ 7, gray Polyvinyl alcohol (abbreviated as PVA) with a part ≤ 1.0, a pH value of 5-7, a degree of polymerization of 1000-2600 and a molecular weight of 70000-120000. Others are the same as in the first or second embodiment.

[0019] The polyvinyl alcohol mixture in this embodiment can be mixed in any proportion among various polyvinyl alcohol grades. The polyvinyl alcohol can be commercially available products such as PVA1788, PVA1799, PVA2088, PVA2099, PVA2499, PVA217, PVA117 and the like that meet the above conditions.

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Abstract

The invention discloses plastic polyvinyl alcohol (PVA) resin and a preparation method thereof, and belongs to the field of plastic resin. The plastic PVA resin solves the technical problem that continuous production is affected by poor stability of PVA resin. The plastic PVA resin is prepared from PVA, plasticizer, surfactant, heat stabilizer, hydrolysis resisting agent, siloxane powder, lubricating agent, melt index regulator, antioxidant and the like. The method comprises the following steps of: weighing the raw materials, adding the raw materials into a high-speed mixer, heating with stirring, and cooling the mixture after the mixture is kept for certain time; and performing granulation, and thus obtaining the plastic PVA resin. The resin is water-soluble resin, can adapt to single-layer or multi-layer membranes or can adapt to injection molding, curtain coating, blow molding and bidirectional stretching, and is a water-soluble membrane series product with cold water solubility and high-temperature water solubility. The method is simple in process, good in processing stability and favorable for continuous production, realizes melting and plastifying extrusion in a dry state, and widens the distance between the melting point and the decomposition point.

Description

technical field [0001] The invention belongs to the field of plastic resins; in particular, it relates to plastic PVA resins and a preparation method thereof. Background technique [0002] PVA (polyvinyl alcohol) is a well-known water-soluble polymer with a wide range of uses. Films made of this polymer are used in water transfer printing, embroidery, disposable packaging, etc., and are also biodegradable. It is resistant to various volatile gases, permeability, oil resistance, and antistatic, so people pay more and more attention to it. A large number of engineers and technicians at home and abroad have invested a lot of energy in development and research. The temperature range of the existing dry processing is above 150°C, so there are yellowing, crosslinking, poor fluidity, increased volatile gas and smoke, and plasticizer precipitation in the high temperature state, which are difficult to overcome. The quality of the product is difficult to stabilize, affecting continuo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L3/02C08K13/02C08K5/5415B29B9/06B29C47/92B29C48/92
Inventor 李瑞军刘艳
Owner 包头市恒瑞新材料科技有限公司
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