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Polyester hydrogels

A technology of polyester and cross-linked polyester, used in biocides, plant growth regulators, animal husbandry, etc., can solve the problems of agricultural applications of cross-linked polyester that are not disclosed

Inactive Publication Date: 2016-08-03
BASF SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Furthermore, the prior art references do not disclose that the crosslinked polyesters can be used in agricultural applications, for example for soil treatment

Method used

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  • Polyester hydrogels
  • Polyester hydrogels
  • Polyester hydrogels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0278] a) Preparation of unsaturated polyester

[0279] 88.3 g of maleic anhydride, 918 g of Pluriol E6000 (polyethylene glycol with Mn of 6000), 79.3 g of diethylene glycol and 0.75 g of tetrabutyl orthotitanate were reacted at a temperature of 180° C. for about 2 hours, whereby water was distilled off. The temperature was then raised to 200°C and vacuum was applied. The resulting polyester had a hydroxyl value of 31 mgKOH / g and an acid value of 25 mgKOH / g.

[0280] b) preparation of cross-linked polyester

[0281] Heat treatment of the unsaturated polyester according to 1 a) at a temperature of 200° C. under vacuum gives a crosslinked polyester. The crosslinked polyester was then stored in a dry box for 24 hours.

Embodiment 2

[0283] a) Preparation of polyester

[0284] 11.8 g of maleic anhydride, 120 g of Pluriol E4000 (polyethylene glycol with Mn of 4000), 10.82 g of diethylene glycol, and 0.1 g of tetrabutyl orthotitanate were reacted at a temperature of 180° C. for about 2 hours, whereby water was distilled off. The temperature was then raised to 200°C and vacuum was applied. The resulting polyester had a hydroxyl value of 28 mgKOH / g and an acid value of 18 mgKOH / g.

[0285] b) preparation of cross-linked polyester

[0286] Heat treatment of the unsaturated polyester according to 2a) under vacuum at a temperature of 200° C. gives a crosslinked polyester. The crosslinked polyester was then stored in a dry box for 24 hours.

Embodiment 3

[0288] a) Preparation of unsaturated polyester

[0289] 11.8 g of maleic anhydride, 126 g of Pluriol E1000 (polyethylene glycol with Mn of 1000) and 0.1 g of tetrabutyl orthotitanate were reacted at a temperature of 180° C. for about 2 hours, whereby water was distilled off. The temperature was then raised to 200°C and vacuum was applied. The resulting polyester had a hydroxyl value of 27 mgKOH / g and an acid value of 19 mgKOH / g.

[0290] b) preparation of cross-linked polyester

[0291] Heat treatment of the unsaturated polyester according to 3a) at a temperature of 200° C. under vacuum gives a crosslinked polyester. The crosslinked polyester was then stored in a dry box for 24 hours.

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Abstract

Cross-linked polyester derived from unsaturated polyester chains, which are inter-molecularly cross-linked and comprise units derived from unsaturated dicarboxylic acid based monomers and ethylene glycol based monomers.

Description

field of invention [0001] The present invention relates to a cross-linked polyester derived from unsaturated polyester chains, which is intermolecularly cross-linked and comprises units derived from group A monomers and group B monomers, wherein (a) group A monomers consist of Body composition: (a1) monomer A1, or (a2) monomer A1 and monomer A2, wherein monomer A1 and monomer A2 exist in a molar ratio of at least 4:1, wherein monomer A1 is selected from the general formula (I ) unsaturated dicarboxylic acid-based monomers and mixtures thereof, and wherein monomer A2 is selected from dicarboxylic acid-based monomers of general formula (II) and mixtures thereof, and wherein (b) Group B monomers are composed of the following monomers Composition: (b1) monomer B1, (b2) monomer B2, or (b3) monomers B1 and B2, wherein monomer B1 is selected from the group consisting of ethylene glycol-based monomers of general formula (III) and mixtures thereof, and wherein Monomer B2 is selected f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/676C08L67/06A01N25/00C05G1/00C05G3/80
CPCA01N25/00A01N25/10C05F11/00C08G63/676C08G63/916C05G3/80C05G5/40C08G2210/00C08G2230/00C09K17/18
Inventor 山本基仪A·维瑟迈尔W·魏格尔特H·凯勒M·索伊弗特G·A·费尔南德斯莱米雷兹J·桑斯-戈麦斯A·维德曼
Owner BASF SE
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