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Aliphatic polyester compound with highly branched structure as plasticizer for polyvinyl chloride and flexible polyvinyl chloride blend with the compound

An aliphatic polyester, highly branched technology, applied in the field of aliphatic polyester compounds with a highly branched structure as polyvinyl chloride plasticizers and flexible polyvinyl chloride blends containing it, can solve the problem of increasing Plastic properties are not good enough, the number of linear polymer end groups is small, chain entanglement and other problems, to achieve excellent compatibility and promote the effect of molecular motion

Inactive Publication Date: 2002-09-25
郭承烨 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small number of end groups in linear polymers, it is impossible to promote molecular motion due to the acceleration of chain end movement
In addition, molecular motion is restricted due to chain entanglement due to the properties of linear polymers
Therefore, the plasticizing properties are not good enough and thus the desired flexibility is not sufficiently imparted to PVC

Method used

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  • Aliphatic polyester compound with highly branched structure as plasticizer for polyvinyl chloride and flexible polyvinyl chloride blend with the compound
  • Aliphatic polyester compound with highly branched structure as plasticizer for polyvinyl chloride and flexible polyvinyl chloride blend with the compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0085] This embodiment is used to describe the α-carboxy-ω-2,2-[bis(hydroxymethyl)propionate]polyester (AB) represented by the above chemical formula 1 2 -1) Self-condensation reaction of monomers to synthesize aliphatic polyester compounds with highly branched structures.

[0086] First, 1.0 mmol of α-carboxy-ω-2,2-[bis(hydroxymethyl)propionate]poly(ε-caprolactone) and 9 mL of dichloromethane solvent were added to a three-neck round bottom flask and Stir until the contents of the flask dissolve. A solution obtained by dissolving 48.0 mg (0.15 mmol) of 4-(dimethylamino)pyridinium 4-toluenesulfonate in dichloromethane was then added. The above catalyst 4-(dimethylamino)pyridinium 4-toluenesulfonate was prepared by the following method. First, 4.75 g (25 mmol) of p-toluenesulfonic acid monohydrate was added to a three-neck round bottom flask equipped with a Stark vapor-water separator, and then removed by adding 20 mL of benzene solvent to the flask for three times of azeotrop...

Embodiment approach 2

[0092] This embodiment is used to describe 2,2-bis[ω-hydroxypoly(ε-caprolactone)methyl]propionic acid (AB 2 -2) Self-condensation reaction of monomers to synthesize aliphatic polyester compounds with highly branched structures.

[0093] Carry out the synthesis according to the same method as embodiment 1, just use the 2,2-di[ω-hydroxyl poly(ε-caprolactone) methyl]propionic acid obtained according to synthesis example 2 to replace the α-carboxyl group of embodiment 1 -ω-[2,2-Di(hydroxymethyl)propyl ester]poly(ε-caprolactone).

[0094] Used AB 2 The kinds of monomer-like monomers and the number-average molecular weight, polydispersity, branching degree, reaction yield, and glass transition temperature Tg of the aliphatic polyester compound having a highly branched structure are given in Table 4 below.

[0095] monomer used

Number Average Molecular Weight (g / mol)

Polydispersity

degree of branching

Tg(°C)

Reaction yield (%)

AB 2 -2-a

...

Embodiment approach 3-4

[0099] These embodiments are used to describe a process for preparing flexible PVC blends using the resulting aliphatic polyester compound having a highly branched structure as a plasticizer. Flexible PVC blends were made by solution blending using tetrahydrofuran as solvent.

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Abstract

The invention discloses an aliphatic polyester compound with a highly branched structure used as a polyvinyl chloride plasticizer, and a polyvinyl chloride blend containing it. The aliphatic polyester compound with highly branched structure used as polyvinyl chloride plasticizer in the present invention is prepared by self-condensation reaction of monomers having one carboxyl functional group and two hydroxyl functional groups. Since this aliphatic polyester compound with a highly branched structure is different from low-molecular-weight conventional liquid plasticizers such as phthalates, it has excellent compatibility with PVC and will never flow out, so It does not cause problems such as disturbance of the human endocrine system and ecological system damage caused by the outflow of plasticizers, and because it has excellent plasticizing efficiency, it can impart sufficient flexibility to polyvinyl chloride.

Description

field of invention [0001] The present invention relates to polyvinyl chloride (hereinafter referred to as PVC) plasticizer and flexible PVC blend, more particularly relate to the aliphatic polyester with highly branched structure and the flexible PVC blend that comprises it, they can overcome Problems such as human endocrine system disorder and ecological system damage caused by plasticizer outflow, and has excellent compatibility with polyvinyl chloride and excellent plasticizing efficiency, which endows polyvinyl chloride with sufficient flexibility. Background technique [0002] PVC is a typical polymer widely used in the manufacture of sounding pipes, food packaging materials, baby items such as baby bottles and toys, textile fibers, interior decoration items, blood storage containers, etc. This type of PVC is rigid because it has a special hierarchical structure inside the molecules and crystallites that serve as physical cross-linking points, allowing molecular movemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/00C08G63/06C08K5/10C08L27/06C08L67/00C08L67/02
CPCC08K5/10C08L27/06C08L67/02C08L2666/14C08G63/00
Inventor 郭承烨崔廷铢
Owner 郭承烨
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