CN102936307A - Epoxy functionalized chain extender, and preparation method and application thereof - Google Patents
Epoxy functionalized chain extender, and preparation method and application thereof Download PDFInfo
- Publication number
- CN102936307A CN102936307A CN2012104869464A CN201210486946A CN102936307A CN 102936307 A CN102936307 A CN 102936307A CN 2012104869464 A CN2012104869464 A CN 2012104869464A CN 201210486946 A CN201210486946 A CN 201210486946A CN 102936307 A CN102936307 A CN 102936307A
- Authority
- CN
- China
- Prior art keywords
- epoxy
- functional
- chainextender
- preparation
- initiator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses an epoxy functionalized chain extender for bio-base and biodegradation-base polymers, and a preparation method and application thereof. The chain extender is prepared from the following raw materials in parts by mass: 50-75 parts of styrene monomer, 25-50 parts of acrylic acid glyceride monomer and 2-12 parts of initiator. The preparation method of the epoxy functionalized chain extender, which comprises the following steps: selecting the reaction monomers and initiator, adding the reaction monomers and initiator into a reaction kettle in a preset sequence, copolymerizing at proper temperature and mixing speed, removing the solvent from the reaction product, and granulating to obtain the product. The epoxy functionalized chain extender can be used for extending and crosslinking bio-base and biodegradable plastic molecular chains of which polylactic acid (PLA) and polypropylene carbonate (PPC) have fatty group polyester structure. The epoxy functionalized chain extender has the characteristics of narrow molecular weight distribution, high glass transition temperature, simple preparation process, and shorter reaction time since all the raw materials are mixed to react at the solvent reflux temperature.
Description
Technical field
The present invention relates to a kind of bio-based and biological degradation based polyalcohol, particularly preparation method and the application thereof of a kind of epoxy-functional chainextender, epoxy-functional chainextender.
Background technology
Green and low-carbon economy is the theme of world today's development, and the trend that bio-based and biodegradable plastic substitute fossil base (oil and coal etc.) plastics is irreversible.Poly(lactic acid) (PLA), polypropylene carbonate (PPC) etc. have the bio-based of fatty group polyester construction and the concern that the biodegradable plastic development more and more is subject to global range, the industrialization technology of synthetic resins trend is ripe on the one hand, and industrialized scale improves rapidly; The exploitation of processing and modification technology is active on the other hand, and the Application Areas of goods is constantly expanded.Compare with traditional fossil base plastics, bio-based and biodegradable polyester resin are intrinsic to thermo-responsive, facile hydrolysis, the drawback such as melt strength is poor and mechanical property is not enough, even can not use separately.Yet, bio-based and biodegradable polyester resin belong to the polycondensation base polymer, often comprise hydroxyl, carboxyl isoreactivity group in its structure, can realize the growth of molecular chain and crosslinked by chainextender, and then improve processing and the application performance of goods, realize the variation of bio-based and biodegradable resin practical and goods processing mode and Application Areas.
R and D are applicable to the heat subject that bio-based and the resinoid chainextender of biodegradable polyesters have become world today's plastic working and modification field.
Take a broad view of domestic and international present situation, the focus of so far chainextender research and development concentrates on epoxy functionalized fluidized polymer aspect substantially, there is following subject matter in the existing technology, at first, for chain extension abundance under the residence time suitable in the extrusion reaction system, bio-based and biodegradable based polyalcohol be must be in advance dry, operate under condition of high vacuum degree, must use catalyzer and stablizer during the processing.If do not possess these features, the degree that molecular weight increases is limited, and product does not reach desirable performance.Secondly, because the functionality of chainextender increases, the degree of branching of made product and the potential of gel also increase.Branching has very strong negative impact to degree of crystallinity on a large scale, and the gel that exists in the product all has very large negative effect to the mechanical property of bio-based and biodegradable based polyalcohol.The second-order transition temperature Tg of the styrene acrylic based copolymer chainextender of the 3rd epoxy-functional is generally 50～70 ℃, and the processing temperature of bio-based and biodegradable based polyalcohol is generally all about 200 ℃.Therefore when the styrene acrylic series chain extender of epoxy-functional was introduced directly into the intake zone of processing units, chainextender just produced reaction in the part before realizing Uniform Dispersion, formed gel.And because the second-order transition temperature Tg of the styrene acrylic series chain extender of epoxy-functional is lower, stop up easily opening for feed, and cause prescription inhomogeneous, produce unstable.
Publication number is the preparation method that the Chinese patent of CN101157739 has been announced a kind of macromolecule material chain extender, relate to a kind of macromolecular material chainextender and preparation method thereof, the component of this chainextender and content (weight part) comprising: styrene monomer 50-75, vinylformic acid glyceride type monomer 50-25, initiator 0.1-1.2, dispersion agent 0.1-1.0, other auxiliary agent 0.1-0.3; The preparation method of this chainextender comprises the above-mentioned reaction monomers of selection and auxiliary agent, sequentially adds reactor according to setting, carries out copolyreaction under suitable temperature and stirring velocity; Reaction product becomes product after washing, drying.The method that this patent is announced comprises dispersion agent and other auxiliary agents, and ionized water is used in the reaction solvent aspect, and reaction approximately needs 7-10h.
Summary of the invention
Based on this, the epoxy-functional chainextender product that a kind of technique is simple, molecular weight distribution is narrower, second-order transition temperature is high, easy to use that the object of the invention is to overcome the defective of prior art existence and provide and the preparation method of epoxy-functional chainextender, it is applied to poly(lactic acid) (PLA), polypropylene carbonate (PPC) etc. has in the bio-based and biodegradable plastic of fatty group polyester construction, second-order transition temperature is high, and the course of processing is stable.
The present invention adopts following technical scheme: a kind of epoxy-functional chainextender forms (pressing mass fraction) by following composition of raw materials:
Styrene monomer: 50～75;
Vinylformic acid glyceride type monomer: 25～50;
Initiator: 2～12.
Preferably, described styrene monomer is vinylbenzene.
Preferably, described vinylformic acid glyceride type monomer is glycidyl methacrylate
Preferably, described initiator refers to benzoyl peroxide.
The present invention also provides a kind of preparation method of epoxy-functional chainextender, may further comprise the steps:
At first, will by the mass fraction proportioning, prepare following raw material:
Styrene monomer: 50～75;
Vinylformic acid glyceride type monomer: 25～50;
Initiator: 2～12;
Solvent: 150～200;
Then, above-mentioned styrene monomer, vinylformic acid glyceride type monomer, initiator are joined in the solvent after mixing, in reactor, be warming up to backflow, keep 2.5-5h;
At last, reclaim solvent, blowing obtains the epoxy-functional chainextender.
Preferably, described reactor is the there-necked flask of band stirring and backflow.
Preferably, described solvent is toluene.
Preferably, temperature 110-120 ℃ after the intensification in reactor.
And as a kind of new purposes of the present invention, the application of wherein said epoxy-functional chainextender in improving poly(lactic acid) (PLA) Tg, molecular weight, moment of torsion and optimization melting index.
And as a kind of new purposes of the present invention, the application of wherein said epoxy-functional chainextender in improving polypropylene carbonate (PPC) Tg, molecular weight, moment of torsion and optimization melting index.
The present invention has following beneficial effect: the characteristics of epoxy-functional chainextender of the present invention are that molecular weight distribution is narrower, second-order transition temperature is high, its manufacturing process is simple, whole raw materials are blended under the temperature of solvent refluxing to react, and the reaction times shortens.
Embodiment
The present invention will be further described in detail below in conjunction with specific embodiment.
Embodiment 1
1), the prescription of epoxy-functional chainextender is:
| Component | Mass fraction |
| Styrene monomer | 50 |
| Vinylformic acid glyceride type monomer | 25 |
| Initiator | 2 |
2), the preparation process of epoxy-functional chainextender
Add 500ml toluene, 350g vinylbenzene, 175g glycidyl acrylate in the 5000ML there-necked flask, the 14g benzoyl peroxide is warming up to 110 ℃, keeps 5h, reclaims solvent, and blowing obtains product.
3), recording product second-order transition temperature Tg is 73 ℃
The foundation of its test is GB/T 19466.2-2004 plastics dsies (DSC) part 2s: the mensuration of second-order transition temperature.
Embodiment 2
1) prescription of epoxy-functional chainextender is:
| Component | Mass fraction |
| Styrene monomer | 75 |
| Vinylformic acid glyceride type monomer | 50 |
| Initiator | 12 |
2), the preparation process of epoxy-functional chainextender
Add 500ml toluene, 375g vinylbenzene, 250g glycidyl acrylate in the 5000ML there-necked flask, the 60g benzoyl peroxide is warming up to 110 ℃, keeps 2.5h, reclaims solvent, and blowing obtains product.
3), recording product second-order transition temperature Tg is 76 ℃.
The foundation of its test is GB/T 19466.2-2004 plastics dsies (DSC) part 2s: the mensuration of second-order transition temperature.
Embodiment 3
And use twin screw extruder according to the processing method of routine poly(lactic acid) (PLA) to be carried out the modification granulation, it is as follows specifically to fill a prescription:
1), Comparative Examples: 0.25% chainextender ADR4370 and 99.75% poly(lactic acid) (PLA) 4032D.
Wherein, German BASF chainextender ADR4370 can buy from market and obtain.
2), experimental example: the epoxy-functional chainextender among 0.25% embodiment 1 and 99.75% poly(lactic acid) (PLA) 4032D.
The result of experiment shows that the Comparative Examples charging opening advanced to produce after tens minutes and gathers materials, and melt pressure changes greatly, and the head discharging is unstable; The experimental example charging is stable rapidly, and melt pressure is always constant, and the head discharging is stable.
Embodiment 4
The epoxy-functional chain extender composition is in the application of poly(lactic acid) (PLA) in (natures4032D) among the embodiment 1, epoxy-functional chainextender and 99% poly(lactic acid) of embodiment 1 with 1% are carried out mixing at torque rheometer, time 900S, 180 ℃ of temperature.
| ? | Pure PLA | Modification PLA |
| Moment of torsion NM | 12.3 | 25.0 |
| Second-order transition temperature ℃ | 60 | 64 |
| Melting index g/10min | 6.7 | 0.57 |
Wherein:
1), moment of torsion is torque rheometer final data behind 180 ℃ of lower mixing 900s.
2), according to GB/T 19466.2-2004 plastics dsies (DSC) part 2: the mensuration of second-order transition temperature.
3), melting index is under 210 ℃, measure under the counterweight 2.16kg condition.
Embodiment 5
The application of epoxy-functional chainextender among the embodiment 1 in polypropylene carbonate (PPC) (covering the west).The epoxy-functional chainextender of the example 1 with 1% and 99% polypropylene carbonate carry out mixing at torque rheometer, time 300S, 130 ℃ of temperature.
| ? | Pure PPC | MODIFIED PP C |
| Moment of torsion NM | 7.3 | 29.5 |
| Second-order transition temperature ℃ | 12.8 | 29.8 |
| Molecular weight | 33000 | 55000 |
| Melting index g/10min | ? | 0.3 |
Wherein:
1), moment of torsion is torque rheometer final data behind 130 ℃ of lower mixing 300s;
2), GB/T 19466.2-2004 plastics dsc (DSC) part 2: the mensuration of second-order transition temperature;
3), molecular weight records with gel chromatography;
4), melting index is under 160 ℃, measure under the counterweight 2.16kg condition.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; and other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. an epoxy-functional chainextender is characterized in that, forms (pressing mass fraction) by following composition of raw materials:
Styrene monomer: 50～75;
Vinylformic acid glyceride type monomer: 25～50;
Initiator: 2～12.
2. epoxy-functional chainextender according to claim 1 is characterized in that, described styrene monomer is vinylbenzene.
3. epoxy-functional chainextender according to claim 1 is characterized in that, described vinylformic acid glyceride type monomer is glycidyl methacrylate.
4. epoxy-functional chainextender according to claim 1 is characterized in that, described initiator refers to benzoyl peroxide.
5. the preparation method of an epoxy-functional chainextender is characterized in that, may further comprise the steps:
At first, will by the mass fraction proportioning, prepare following raw material:
Styrene monomer: 50～75;
Vinylformic acid glyceride type monomer: 25～50;
Initiator: 2～12;
Solvent: 150～200;
Then, above-mentioned styrene monomer, vinylformic acid glyceride type monomer, initiator are joined in the solvent after mixing, in reactor, be warming up to backflow, keep 2.5-5h.
At last, reclaim solvent, blowing obtains the epoxy-functional chainextender.
6. the preparation method of epoxy-functional chainextender according to claim 5 is characterized in that, the there-necked flask that described reactor stirs and refluxes for band.
7. the preparation method of epoxy-functional chainextender according to claim 5 is characterized in that, described solvent is toluene.
8. the preparation method of epoxy-functional chainextender according to claim 5 is characterized in that, after heating up in reactor temperature 110-120 ℃.
9. the application of an epoxy-functional chainextender according to claim 1 is characterized in that, the application of described epoxy-functional chainextender in improving poly(lactic acid) (PLA) Tg, molecular weight, moment of torsion and optimization melting index.
10. the application of an epoxy-functional chainextender according to claim 1 is characterized in that, the application of described epoxy-functional chainextender in improving polypropylene carbonate (PPC) Tg, molecular weight, moment of torsion and optimization melting index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210486946.4A CN102936307B (en) | 2012-11-27 | 2012-11-27 | The preparation method of a kind of epoxy-functional chainextender, epoxy-functional chainextender and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210486946.4A CN102936307B (en) | 2012-11-27 | 2012-11-27 | The preparation method of a kind of epoxy-functional chainextender, epoxy-functional chainextender and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102936307A true CN102936307A (en) | 2013-02-20 |
| CN102936307B CN102936307B (en) | 2015-10-21 |
Family
ID=47695236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210486946.4A Active CN102936307B (en) | 2012-11-27 | 2012-11-27 | The preparation method of a kind of epoxy-functional chainextender, epoxy-functional chainextender and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102936307B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103724522A (en) * | 2013-12-31 | 2014-04-16 | 内蒙古蒙西高新技术集团有限公司 | Substance containing multiple epoxy functional groups, preparation method thereof, terpolymer of substance, carbon dioxide and epoxy propane and copolymerization method thereof |
| CN103881001A (en) * | 2014-03-27 | 2014-06-25 | 杭州曦茂新材料科技有限公司 | Preparation method and application of comb-type epoxy capacity-increasing chain extender for polymer material |
| CN104193879A (en) * | 2014-08-23 | 2014-12-10 | 山西省化工研究所（有限公司） | Melt reinforcing agent with functional group as well as preparation and application of melt reinforcing agent |
| WO2015100517A1 (en) * | 2013-12-31 | 2015-07-09 | 内蒙古蒙西高新技术集团有限公司 | Substance containing multiple epoxy functional groups, preparation method therefor, terpolymer of same, carbon dioxide and epoxy propane, and copolymerization method therefor |
| CN105837722A (en) * | 2016-06-20 | 2016-08-10 | 王金明 | Preparation method of hydrophilic capacity-increasing chain extender |
| CN105859939A (en) * | 2016-06-20 | 2016-08-17 | 王金明 | Preparation method of organic silicon capacity increasing chain extender |
| CN105859975A (en) * | 2016-06-19 | 2016-08-17 | 王金明 | Preparation method of capacity-increasing chain extender with core-shell structure |
| CN106065043A (en) * | 2016-07-28 | 2016-11-02 | 王金明 | A kind of preparation method of the Organic fluoride hydrophobic type chain extender containing ionic liquid |
| CN106188369A (en) * | 2016-07-28 | 2016-12-07 | 王金明 | A kind of preparation method of the chain-expanding agent containing organic fluorinated silicone |
| CN109575196A (en) * | 2018-12-12 | 2019-04-05 | 温州大学新材料与产业技术研究院 | A kind of polylactic acid chain extender and preparation method thereof and polydactyl acid |
| CN110452325A (en) * | 2019-07-26 | 2019-11-15 | 广州华新科智造技术有限公司 | Terpolymer and preparation method thereof |
| CN111499789A (en) * | 2020-04-17 | 2020-08-07 | 佳易容聚合物(上海)有限公司 | Solvent-free tackifying chain extender and preparation method and application thereof |
| CN112279985A (en) * | 2020-11-01 | 2021-01-29 | 福建师范大学 | Degradable chain extender and preparation method and application thereof |
| CN112778454A (en) * | 2021-01-22 | 2021-05-11 | 上海涵点科技有限公司 | Polyepoxy chain extender and preparation method and application thereof |
| CN114621570A (en) * | 2022-03-29 | 2022-06-14 | 湖北中烟工业有限责任公司 | Regeneration method and application of residual materials in cooling section of flue gas |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157739A (en) * | 2006-10-08 | 2008-04-09 | 周小雯 | Method for preparing macromolecule material chain extender |
| CN101440141A (en) * | 2007-11-23 | 2009-05-27 | 佛山市顺德区汉达精密电子科技有限公司 | Compatibilization chain extender for recycling engineering plastics |
| US20090312500A1 (en) * | 2008-06-16 | 2009-12-17 | Basf Corporation | End capping additive for polycondensate polymer resins |
| US20120184678A1 (en) * | 2009-07-21 | 2012-07-19 | Deeter Gary A | Process for the production of condensation polymers via in-reactor chain extension and products thereof |
-
2012
- 2012-11-27 CN CN201210486946.4A patent/CN102936307B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157739A (en) * | 2006-10-08 | 2008-04-09 | 周小雯 | Method for preparing macromolecule material chain extender |
| CN101440141A (en) * | 2007-11-23 | 2009-05-27 | 佛山市顺德区汉达精密电子科技有限公司 | Compatibilization chain extender for recycling engineering plastics |
| US20090312500A1 (en) * | 2008-06-16 | 2009-12-17 | Basf Corporation | End capping additive for polycondensate polymer resins |
| US20120184678A1 (en) * | 2009-07-21 | 2012-07-19 | Deeter Gary A | Process for the production of condensation polymers via in-reactor chain extension and products thereof |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103724522A (en) * | 2013-12-31 | 2014-04-16 | 内蒙古蒙西高新技术集团有限公司 | Substance containing multiple epoxy functional groups, preparation method thereof, terpolymer of substance, carbon dioxide and epoxy propane and copolymerization method thereof |
| WO2015100517A1 (en) * | 2013-12-31 | 2015-07-09 | 内蒙古蒙西高新技术集团有限公司 | Substance containing multiple epoxy functional groups, preparation method therefor, terpolymer of same, carbon dioxide and epoxy propane, and copolymerization method therefor |
| CN103724522B (en) * | 2013-12-31 | 2016-04-13 | 内蒙古蒙西高新技术集团有限公司 | Containing terpolymer and the copolymerization process of the material of multiple epoxy-functional, its preparation method, itself and carbonic acid gas and propylene oxide |
| CN103881001A (en) * | 2014-03-27 | 2014-06-25 | 杭州曦茂新材料科技有限公司 | Preparation method and application of comb-type epoxy capacity-increasing chain extender for polymer material |
| CN104193879A (en) * | 2014-08-23 | 2014-12-10 | 山西省化工研究所（有限公司） | Melt reinforcing agent with functional group as well as preparation and application of melt reinforcing agent |
| CN105859975A (en) * | 2016-06-19 | 2016-08-17 | 王金明 | Preparation method of capacity-increasing chain extender with core-shell structure |
| CN105837722A (en) * | 2016-06-20 | 2016-08-10 | 王金明 | Preparation method of hydrophilic capacity-increasing chain extender |
| CN105859939A (en) * | 2016-06-20 | 2016-08-17 | 王金明 | Preparation method of organic silicon capacity increasing chain extender |
| CN106065043A (en) * | 2016-07-28 | 2016-11-02 | 王金明 | A kind of preparation method of the Organic fluoride hydrophobic type chain extender containing ionic liquid |
| CN106188369A (en) * | 2016-07-28 | 2016-12-07 | 王金明 | A kind of preparation method of the chain-expanding agent containing organic fluorinated silicone |
| CN109575196A (en) * | 2018-12-12 | 2019-04-05 | 温州大学新材料与产业技术研究院 | A kind of polylactic acid chain extender and preparation method thereof and polydactyl acid |
| CN109575196B (en) * | 2018-12-12 | 2022-04-05 | 温州大学新材料与产业技术研究院 | Polylactic acid chain extender, preparation method thereof and modified polylactic acid |
| CN110452325A (en) * | 2019-07-26 | 2019-11-15 | 广州华新科智造技术有限公司 | Terpolymer and preparation method thereof |
| CN111499789A (en) * | 2020-04-17 | 2020-08-07 | 佳易容聚合物(上海)有限公司 | Solvent-free tackifying chain extender and preparation method and application thereof |
| CN111499789B (en) * | 2020-04-17 | 2021-01-12 | 佳易容聚合物(上海)有限公司 | Solvent-free tackifying chain extender and preparation method and application thereof |
| WO2021208234A1 (en) * | 2020-04-17 | 2021-10-21 | 佳易容聚合物(上海)有限公司 | Solvent-free adhesion-promoting chain extender, preparation method therefor, and application thereof |
| CN112279985A (en) * | 2020-11-01 | 2021-01-29 | 福建师范大学 | Degradable chain extender and preparation method and application thereof |
| CN112778454A (en) * | 2021-01-22 | 2021-05-11 | 上海涵点科技有限公司 | Polyepoxy chain extender and preparation method and application thereof |
| CN112778454B (en) * | 2021-01-22 | 2022-03-08 | 上海涵点科技有限公司 | Polyepoxy chain extender and preparation method and application thereof |
| CN114621570A (en) * | 2022-03-29 | 2022-06-14 | 湖北中烟工业有限责任公司 | Regeneration method and application of residual materials in cooling section of flue gas |
| CN114621570B (en) * | 2022-03-29 | 2023-09-19 | 湖北中烟工业有限责任公司 | Regeneration method and application of residual materials in flue gas cooling section |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102936307B (en) | 2015-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102936307A (en) | Epoxy functionalized chain extender, and preparation method and application thereof | |
| CN105220264B (en) | A kind of modified polylactic acid fiber and preparation method thereof | |
| CN102766330B (en) | Low-temperature-resistant ultra-toughness modified nylon alloy material and preparation method thereof | |
| CN102702705A (en) | Toughened polylactic acid/polyolefin elastomer composite material and preparation method thereof | |
| BRPI0512370B1 (en) | PROCESS FOR INTRODUCING LONG CHAIN RAMIFICATION IN A FUSION PROCESSABLE POLYLATIDE RESIN | |
| CN101157739A (en) | Method for preparing macromolecule material chain extender | |
| CN103965493B (en) | There is the preparation method of the HMW Stereocomplex type PLA of melt stability characteristic | |
| US20220177620A1 (en) | Solvent-free adhesion-promoting chain extender, preparation method therefor, and application thereof | |
| CN103571158A (en) | High interfacial compatibility PLA/PBAT blend and preparation method | |
| CN104312121A (en) | High-toughness transparent polylactic acid film and preparing method thereof | |
| CN101974136B (en) | Method for preparing high-toughness degradable material by using melt-grafting blending method | |
| JP5212183B2 (en) | Resin composition and molded article using the same | |
| CN103965595A (en) | Poly lactic acid stereocomplex with interpenetrating network structure and preparation method thereof | |
| CN113943387A (en) | Preparation method and application of high-activity tackifying chain extender without monomer residues | |
| US20040147678A1 (en) | Solid concentrate composition for polymeric chain extension | |
| US20120189860A1 (en) | Polymeric compositions comprising polylactic acid oligomers and methods of making the same | |
| US11130259B1 (en) | Device and method for online preparation of modified polylactic acid material with polylactic acid melt | |
| CN103242628A (en) | Polyolefin-polyester blending recovery method | |
| CN109400966A (en) | A kind of degradable plastic material formula | |
| CN114806100A (en) | Polyester black film and manufacturing method thereof | |
| US8765879B2 (en) | Modified recycled polyester resin and molded article using the same | |
| KR102601295B1 (en) | Composition for polymeric chain extension | |
| CA2595008A1 (en) | Compartmentalized chips with similar polymers of different viscosities for improved processability | |
| CN105924557A (en) | Long-chain branch copolymer resin and preparation method thereof | |
| CN108164943A (en) | modified polylactic acid material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |