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Multivinyl siloxane oligomer-based polymer dispersions and methods of preparing and using same

A polyvinyl siloxane and polymer technology, applied in the directions of graft polymer adhesives, adhesive types, coatings, etc., can solve the problems of reducing the mechanical properties of products and increasing the cost.

Inactive Publication Date: 2015-04-01
BASF SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while cross-linking agents can result in increased cohesive strength, these agents often reduce other mechanical properties of the product (e.g. toughness)
In addition, the use of these reagents (especially in large quantities) leads to a significant increase in the cost of the product

Method used

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  • Multivinyl siloxane oligomer-based polymer dispersions and methods of preparing and using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative Embodiment 1-2

[0036] Prepare an aqueous polymer dispersion:

Embodiment 1

[0037]Example 1 was prepared by adding 205.3 g of water, 0.07 g of a 40% aqueous solution of ethylenediaminetetraacetic acid (EDTA), and 0.7 g of ascorbic acid to a reaction vessel and heating the mixture to 90°C. From the initiator charge of 114.4 g water and 8.6 g sodium persulfate, 10% was removed and added to the reaction mixture. Subsequently, the following three separate feeds were added at a constant feed rate in the following manner: (a) the remaining initiator feed was added over 3.75 hours; (b) 23.4 g of the monomer emulsion mixture feed was added over 15 minutes , the mixture feed consists of 184.9g of water, 53.0g of 15% sodium lauryl sulfate aqueous solution, 5.9g of 90% LUTENSOL TDA-8 aqueous solution, 53.0g of 10% sodium hydroxide aqueous solution, 0.8g t-10 Dialkylthiol, 2.7g ethoxy-substituted polyvinylsiloxane oligomer (oligo-VTES), 91.4g styrene, 22.5g acrylic acid and 1148.8g n-butyl acrylate, followed by 15 minutes Another 70.3 g was added internally, and...

Embodiment 2

[0047] Example 2 was prepared as described in Example 1 except that the amount of oligo-VTES used in the monomer emulsion mixture was increased to 0.3%, based on the total weight of monomers. The total solid content of embodiment 2 is 65.3%, based on the weight of aqueous dispersion, pH is 4.7, viscosity is 193cps, and T g to -30°C. Comparative Example 3 was prepared as described in Comparative Example 2, except that the amount of VTES used in the monomer emulsion mixture was increased to 0.3%, based on the total weight of the monomers. The total solid content of Comparative Example 3 is 65.5%, based on the weight of the aqueous dispersion, the pH is 4.8, and the viscosity is 172 cps. The mechanical properties of the films cured at 50°C for 24 hours and 96 hours are compared in Table 2. Similar to Example 1, these results demonstrate that films prepared from polymers containing polyvinylsiloxane oligomers have higher tensile strength and complex modulus than films prepared f...

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Abstract

Multivinyl siloxane oligomer-based compositions and methods for their preparation and use are described herein. The multivinyl siloxane oligomer-based compositions can be prepared as aqueous polymer dispersion. The aqueous polymer dispersions can include water and a polymer derived from at least one multivinyl siloxane oligomer having an Si—O—Si backbone and at least one alkoxy group and one or more additional monomers. Further described herein are products including the aqueous polymer dispersions and methods for their preparation and use.

Description

Background technique [0001] Polymer dispersions can be used to prepare some consumer products. The mechanical properties of these products can be determined in terms of eg cohesive strength, toughness, adhesion and barrier properties. Several methods have been used to improve these properties. For example, crosslinking agents are added to the dispersion to increase the cohesive strength of the product. However, while cross-linking agents can result in increased cohesive strength, these agents typically reduce other mechanical properties of the product (eg toughness). Furthermore, the use of these reagents, especially in large quantities, leads to a significant increase in the cost of the product. Contents of the invention [0002] Polyvinylsiloxane oligomer-based polymer dispersions and their preparation and use are described herein. The polyvinylsiloxane oligomer-based polymer dispersion is an aqueous polymer dispersion that may include water and a polymer derived from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F230/08C08F283/12C09D151/08C09D155/00C09J151/08C09J155/00
CPCC08L83/04C09D151/085C08K3/26C08F283/12C09J151/085C08F283/124C08F220/1804C08F212/08C08F220/00C08F220/06C08F220/44
Inventor A·布哈特
Owner BASF SE