CN105111374A

CN105111374A - Preparation method of resin material

Info

Publication number: CN105111374A
Application number: CN201510536208.XA
Authority: CN
Inventors: 王学刚; 王建斌; 陈田安; 解海华
Original assignee: Yantai Darbond Technology Co Ltd
Current assignee: Yantai Darbond Technology Co Ltd
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2015-12-02

Abstract

The invention provides a preparation method of a resin material. The preparation method has the beneficial effects that the main formula components are cassava starch and vinyl acetate; the plant starch is biodegradable in nature; and vinyl acetate can be hydrolyzed under certain conditions, cooperates with hydroxy in a protective colloid polyvinyl alcohol to play a role of hydrophily and shows good degradability at an appropriate temperature in the microbial environment.

Description

A kind of preparation method of resin material

Technical field

The present invention relates to resin technology field, particularly a kind of Degradable plastic film resin.

Background technology

Along with social development, the requirement of energy-conserving and environment-protective is paid attention to day by day, in present plastics film industry, still have in a large number at so-called " white garbages " such as use nondegradable polyethylene, polypropylene films, very large impact is brought to environment, to, from basic head it off, just should substitute existing with the plastics can degraded, easily degrade.

At present, domesticly cook plastics at real this type of plastic film of application, main concentrated following a few class: aliphatic polyester and multipolymer, starch-based polymer and polylactic acid-based plastics, have that production cost is high, the intensity difference of plastics and the reason such as not to be durable, so that apply slow, only have a small amount of applying.

In view of above-mentioned reason, study more how favourable masking raw material, to be particularly naturally easy to get, cost is low, is easy to Biodegradable films starting material, and be the hot research method in developing material field, relative reporter is also less.

Summary of the invention

The present invention be directed to existing deficiency; a kind of polyvinyl alcohol is provided to do protective colloid; the method of degradable plastic film resin material is produced in vinyl acetate and tapioca (flour) graft copolymerization, has that water-tolerant, mechanical strength are high, nontoxic, low cost and an advantage such as biodegradable.

Technical scheme of the present invention is: a kind of preparation method of Degradable plastic film resin material, it is characterized in that doing degredation plastic starting material by graft polymerization.

Processing step and the condition of preparation Degradable plastic film resin material provided by the invention are:

1,75-95 weight part tapioca (flour) is joined 250-350 part water and be made into amidin, add the sodium hydroxide of 1-2 weight part, gelatinization 20 minutes at 70-90 DEG C of temperature;

2, starch solution after gelatinization is cooled to 50-60 DEG C, the polyvinyl alcohol water solution dissolved in advance (massfraction 30%) is added 10-20 weight part;

3, add initiator di-isopropyl peroxydicarbonate or the dibenzoyl peroxide of 1-2 weight part, stir 15-20 minute; The vinyl acetate blended mixts of methyl methacrylate and 50-70 weight part that slow dropping adds 13-20 weight part carries out graft copolymerization, control temperature 75-85 DEG C, joining day 2-2.5 hour;

4, temperature of reaction control 75-85 DEG C, time 1.5-2.0 hour, obtains graft copolymer, decompress filter, and drying obtains graft copolymer resin material.

Further, polyvinyl alcohol described in step 1 is the one in polyvinyl alcohol 1780,1799.

The relatively existing technology of Degradable plastic film resin material provided by the invention; main formula composition is tapioca (flour), vinyl acetate; plant amylum is biodegradable at occurring in nature; vinyl acetate can be hydrolyzed under certain condition; hydroxyl in mating protection colloidal polyurea vinyl alcohol; volatilization wetting ability effect, under applicable temperature and microbial environment, shows good degradation property.

Embodiment

Embodiment 1

The formula that the present embodiment adopts is:

Tapioca (flour) 80 parts

Polyvinyl alcohol (1780) 4.5 parts

Methyl methacrylate 15 parts

Vinyl acetate 60 parts

Di-isopropyl peroxydicarbonate 1.5 parts

1 part, sodium hydroxide

300 parts, water

Above-mentioned selected materials is technical grade reagent.

Step of preparation process and the condition of the present embodiment are:

1,80 weight part tapioca (flour)s are joined 285 parts of water and be made into amidin, add the sodium hydroxide of 1 weight part, gelatinization 20 minutes at 70 DEG C of temperature, to transparent;

2, starch solution after gelatinization is cooled to 50 DEG C, polyvinyl alcohol 1780 solution (30%) dissolved in advance is added 15 weight parts, and is warming up to 75 DEG C;

3, add the initiator di-isopropyl peroxydicarbonate of 1.5 weight parts, stir 15 minutes; The vinyl acetate blended mixts of methyl methacrylate and 60 weight parts that slow dropping adds 15 weight parts carries out graft copolymerization, controls 2 hours joining days;

4, temperature of reaction controls 75 DEG C, and 1.5 hours time, obtain graft copolymer, wherein solid content 35%, viscosity 600-800mpas, decompress filter, spraying dry obtains graft copolymer resin material.

Embodiment 2

The formula that the present embodiment adopts is:

Tapioca (flour) 75 parts

Polyvinyl alcohol (1799) 3 parts

Methyl methacrylate 13 parts

Vinyl acetate 50 parts

Dibenzoyl peroxide 1.0 parts

1.5 parts, sodium hydroxide

280 parts, water

Above-mentioned selected materials is technical grade reagent.

Step of preparation process and the condition of the present embodiment are:

1,75 weight part tapioca (flour)s are joined 275 parts of water and be made into amidin, add the sodium hydroxide of 1.5 weight parts, gelatinization 20 minutes at 80 DEG C of temperature, to transparent;

2, starch solution after gelatinization is cooled to 60 DEG C, polyvinyl alcohol 1799 solution (30%) dissolved in advance is added 10 weight parts, and is warming up to 80 DEG C;

3, add the initiator dibenzoyl peroxide of 1 weight part, stir 20 minutes; The vinyl acetate blended mixts of methyl methacrylate and 50 weight parts that slow dropping adds 13 weight parts carries out graft copolymerization, controls 2 hours joining days;

4, temperature of reaction controls 80 DEG C, and 1.5 hours time, obtain graft copolymer, wherein solid content 33%, viscosity 550-650mpas, decompress filter, spraying dry obtains graft copolymer resin material.

Embodiment 3

The formula that the present embodiment adopts is:

Tapioca (flour) 95 parts

Polyvinyl alcohol (1799) 6 parts

Methyl methacrylate 20 parts

Vinyl acetate 70 parts

Di-isopropyl peroxydicarbonate 2.0 parts

2 parts, sodium hydroxide

350 parts, water

Above-mentioned selected materials is technical grade reagent.

Step of preparation process and the condition of the present embodiment are:

1,95 weight part tapioca (flour)s are joined 344 parts of water and be made into amidin, add the sodium hydroxide of 2 weight parts, gelatinization 30 minutes at 80 DEG C of temperature, to transparent;

2, starch solution after gelatinization is cooled to 60 DEG C, polyvinyl alcohol 1799 solution (30%) dissolved in advance is added 20 weight parts, and is warming up to 85 DEG C;

3, add the initiator di-isopropyl peroxydicarbonate of 2 weight parts, stir 20 minutes; The vinyl acetate blended mixts of methyl methacrylate and 70 weight parts that slow dropping adds 20 weight parts carries out graft copolymerization, controls 2.5 hours joining days;

4, temperature of reaction controls 83 DEG C, and time 2 h obtains graft copolymer, wherein solid content 35%, viscosity 700-850mpas, decompress filter, and spraying dry obtains graft copolymer resin material.

Experimental example degradation capability is tested

Degradation property test is carried out according to GB/T20197-2006, the results are shown in following table:

From the data of degradation experiment, along with the prolongation of time, degradation rate increases gradually, and within the time of 30-180 days, maximum degradation rate can reach 45.7%.

Claims

1. a preparation method for resin material, is characterized in that, processing step comprises:

1) 75-95 weight part tapioca (flour) is joined 250-350 part water and be made into amidin, add the sodium hydroxide of 1-2 weight part, gelatinization 20 minutes at 70-90 DEG C of temperature;

2) starch solution after gelatinization is cooled to 50-60 DEG C, the polyvinyl alcohol water solution dissolved in advance is added 10-20 weight part;

3) add initiator di-isopropyl peroxydicarbonate or the dibenzoyl peroxide of 1-2 weight part, stir 15-20 minute; The vinyl acetate blended mixts of methyl methacrylate and 50-70 weight part that slow dropping adds 13-20 weight part carries out graft copolymerization, control temperature 75-85 DEG C, joining day 2-2.5 hour;

4) temperature of reaction control 75-85 DEG C, time 1.5-2.0 hour, obtains graft copolymer, decompress filter, and drying obtains graft copolymer resin material.

2. preparation method as claimed in claim 1, it is characterized in that, described polyvinyl alcohol is the one in polyvinyl alcohol 1780,1799.

3. preparation method as claimed in claim 1, it is characterized in that, the massfraction of polyvinyl alcohol water solution is 30%.

4. preparation method as claimed in claim 1, is characterized in that, comprising:

1) 80 weight part tapioca (flour)s are joined 285 parts of water and be made into amidin, add the sodium hydroxide of 1 weight part, gelatinization 20 minutes at 70 DEG C of temperature, to transparent;

2) starch solution after gelatinization is cooled to 50 DEG C, polyvinyl alcohol 1780 solution (30%) dissolved in advance is added 15 weight parts, and is warming up to 75 DEG C;

3) add the initiator di-isopropyl peroxydicarbonate of 1.5 weight parts, stir 15 minutes; The vinyl acetate blended mixts of methyl methacrylate and 60 weight parts that slow dropping adds 15 weight parts carries out graft copolymerization, controls 2 hours joining days;

4) temperature of reaction controls 75 DEG C, and 1.5 hours time, obtain graft copolymer, decompress filter, spraying dry obtains graft copolymer resin material.

5. preparation method as claimed in claim 1, is characterized in that, comprising:

1) 75 weight part tapioca (flour)s are joined 275 parts of water and be made into amidin, add the sodium hydroxide of 1.5 weight parts, gelatinization 20 minutes at 80 DEG C of temperature, to transparent;

2) starch solution after gelatinization is cooled to 60 DEG C, polyvinyl alcohol 1799 solution (30%) dissolved in advance is added 10 weight parts, and is warming up to 80 DEG C;

3) add the initiator dibenzoyl peroxide of 1 weight part, stir 20 minutes; The vinyl acetate blended mixts of methyl methacrylate and 50 weight parts that slow dropping adds 13 weight parts carries out graft copolymerization, controls 2 hours joining days;

4) temperature of reaction controls 80 DEG C, and 1.5 hours time, obtain graft copolymer, decompress filter, spraying dry obtains graft copolymer resin material.

6. preparation method as claimed in claim 1, is characterized in that, comprising:

1) 95 weight part tapioca (flour)s are joined 344 parts of water and be made into amidin, add the sodium hydroxide of 2 weight parts, gelatinization 30 minutes at 80 DEG C of temperature, to transparent;

2) starch solution after gelatinization is cooled to 60 DEG C, polyvinyl alcohol 1799 solution (30%) dissolved in advance is added 20 weight parts, and is warming up to 85 DEG C;

3) add the initiator di-isopropyl peroxydicarbonate of 2 weight parts, stir 20 minutes; The vinyl acetate blended mixts of methyl methacrylate and 70 weight parts that slow dropping adds 20 weight parts carries out graft copolymerization, controls 2.5 hours joining days;

4) temperature of reaction controls 83 DEG C, and time 2 h obtains graft copolymer, decompress filter, and spraying dry obtains graft copolymer resin material.