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Thermally interlinking polyacrylate and method for its manufacture

A polyacrylate, cross-linking agent technology, used in chemical instruments and methods, other chemical processes, ester copolymer adhesives, etc., to achieve excellent controllability

Active Publication Date: 2013-10-16
TESA SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Because the crosslinking is initiated using UV rays, the resulting disadvantages are the same as those described above

Method used

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  • Thermally interlinking polyacrylate and method for its manufacture
  • Thermally interlinking polyacrylate and method for its manufacture
  • Thermally interlinking polyacrylate and method for its manufacture

Examples

Experimental program
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preparation example Construction

[0218]Described below is the preparation of the starting polymers. The polymers studied are conventionally prepared in solution by free-radical addition polymerization.

[0219]

[0220] A conventional reactor for free radical polymerization was charged with 45 kg of 2-ethylhexyl acrylate, 45 kg of n-butyl acrylate, 5 kg of methyl acrylate, 5 kg of acrylic acid and 66 kg of acetone / isopropanol (92.5:7.5) . After nitrogen was purged into the reactor for 45 minutes with stirring, the reactor was heated to 58°C and 50 g of AIBN was added. Subsequently, the external heating bath was heated to 75° C. and the reaction was allowed to proceed constantly at this external temperature. After 1 hour, a further 50 g of AIBN were added, and after 4 hours the batch was diluted with 20 kg of an acetone / isopropanol mixture.

[0221] After 5 hours and again after 7 hours, reinitiation was carried out with 150 g of bis(4-tert-butylcyclohexyl)peroxydicarbonate in each case. After 22 hours ...

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Abstract

Crosslinker-accelerator unit comprises substance(s) containing epoxide and / or oxetane group as crosslinker, and reaction product(s) of two or more of cyanamide molecules and / or derivative(s) as accelerator. Independent claims are included for the following: (1) thermal crosslinking process of polyacrylate with functional group capable of performing crosslinking reaction with cyclic ether, which involves using crosslinker-accelerator unit; and (2) usage of polyacrylate.

Description

technical field [0001] The present invention relates to a process for the thermal crosslinking of polyacrylates, to a crosslinker-accelerator system for the crosslinking, to thermal crosslinking and to crosslinked polyacrylates prepared by the thermal crosslinking. Background technique [0002] For high-end industrial applications, more specifically including applications as adhesives, pressure-sensitive adhesives or heat-sealing compositions, ingredients used include polyacrylates, polymers that are well suited to need to stand out. [0003] Therefore, adhesive compounds are required to have a good tack, but must also meet stringent requirements in terms of shear strength. At the same time, good processability must also be present, including in particular a high suitability for coating these compositions onto backing materials. In particular, this is achieved by polyacrylates having a high molecular weight, high polarity and subsequent efficient crosslinking. Furthermore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/15C08K5/1515C08K5/31C08K5/3492C08J3/24C08L33/04C09J133/04C09J7/02C09K3/10
CPCC09J2201/61C08F2220/1858C09J133/08B29B7/485B29B7/487B29B7/726B29B7/7495B29B7/90C08F220/1808C09J2301/304B29B7/56C08F220/14C08F220/1807C08F220/281C08F220/06C08J3/24C08K5/1515C08K5/315C08F20/18B05D3/02C08F220/10
Inventor 诺伯特·格里特纳斯文·汉森亚历山大·普伦泽尔斯蒂芬·佐尔纳
Owner TESA SE