Unlock instant, AI-driven research and patent intelligence for your innovation.

Organofunctional silicone copolymers and the saponification products thereof

A technology of siloxane copolymer and hydrolyzate, applied in other chemical processes, coatings, chemical instruments and methods, etc., can solve problems such as poor performance and solid resin turbidity

Inactive Publication Date: 2006-11-29
WACKER CHEM GMBH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, blends of solid vinyl ester resins and silicones perform poorly: due to the incompatibility of vinyl ester polymers with silicones, phase separation and / or formation of silicone domains occurs, the solid resin becomes become cloudy
Furthermore, the formation of siloxane domains and the presence of unattached siloxanes lead to migration effects

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Modulator (sulfhydryl-PDMS)

[0050] Mercapto—polydimethylsiloxane, the chain length is about 150 dimethylsiloxane groups and the chain contains about 3 mercaptopropyl groups.

[0051] PDMS mixture

[0052] A mixture of three polydimethylsiloxanes each with a chain length of about 100 dimethylsiloxane units, which contains 5% by weight of non-functionalized polydimethylsiloxane, 20 by weight % Of α-monovinyl polydimethylsiloxane, and 75% by weight of α,ω-divinyl polydimethylsiloxane.

Embodiment 2

[0057] Repeat Comparative Example 1 again, the differences are as follows:

[0058] Initial feed: 737.2 g ethyl acetate, 137.2 g isopropanol, 9.5 g PDMS mixture, 0.5 g PPV and 34.3 g vinyl acetate.

[0059] Initiator feed: 51.4 g ethyl acetate and 2.0 g PPV, the metering rate was 11.5 ml / h, which lasted 310 minutes.

[0060] Monomer feed: 76.2 g of PDMS mixture and 274.3 g of vinyl acetate, the metering rate was 93.4 ml / h, which lasted for 240 minutes.

[0061] The polymerization was subsequently carried out at a temperature of 70°C for 90 minutes. The obtained 1-phase polymer solution is dried according to the above method. As a result, a resin that was transparent at room temperature was prepared.

[0062] Analysis: siloxane copolymer content: 99.0%, gas chromatography analysis: residual vinyl acetate content 0.019%; residual ethyl acetate content 0.8%; residual isopropanol content 0.17%; acid value 2.81 mg KOH / g, viscosity (Hopler, 10% concentration solution in ethyl acetate)=1...

Embodiment 5

[0078] Into a stirring tank with an anchor stirrer, reflux condenser and metering device and a capacity of 120 liters, 34.17 g ethyl acetate, 3.4 kg isopropanol, 189.6 g PDMS mixture, 25.6 g PPV and 1.71 kg vinyl acetate are charged Base ester. Subsequently, the stirring tank was heated to 70°C with a stirring rate of 95 revolutions per minute. After the internal temperature reached 70°C, metered addition of initiator (2.56 g ethyl acetate and 99.7 g PPV) was started at a rate of 512.0 g / h. Ten minutes after the start of the initiator feed, the monomer feed (1.52 kg PDMS mixture and 13.67 kg vinyl acetate) was added at a rate of 3.80 kg / hr. The initiator feed took 310 minutes and the monomer feed was terminated 60 minutes earlier. After the two feeds were terminated, the polymerization was continued at 70°C for 120 minutes. Subsequently, 1000 ml of water was added, and the obtained 1-phase polymer solution was distilled in the stirring tank at a temperature of 95°C, followed by dr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
acid valueaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to organofunctional silicone copolymers and the saponification products thereof that are obtained by polymerization in a non-aqueous solvent, in the presence of radical initiators, of a1) = 50 % by weight of one or more monomers from the group including vinyl esters of unbranched or branched alkyl carbonic esters having 1 to 15 C atoms, and a2) 0 to 20 % by weight of one or more monomers from the group including mono-unsaturated olefins and dienes, and b) 1 to 50 % by weight of one or more silicones having the general formula R<1>aR3-aSiO(SiR2O)nSiR3-aR<1>a, wherein R is the same or different, and represents a monovalent, optionally substituted, alkyl group or alkoxy group having 1 to 18 C atoms each, R<1> is a polymerizable group, a is 0 or 1, and n = 10 to 1000, whereby 85 to 100 % by weight of the silicones b) contain one to two polymerizable groups, and whereby further silicones b) having only one polymerizable group are used only in admixture with silicones b) having two polymerizable groups and in a weight ratio of = 50 / 50, and c) 0 to 10 % by weight of one or more hydrolyzable silane monomers from the group including ethylenically unsaturated, hydrolyzable silicium compounds and hydrolyzable silicium compounds from the group of the mercaptosilanes. The indications in % by weight for components a) to c) are based on the total weight of the monomers used and add up to 100 % by weight. The invention is characterized in that the non-aqueous solvent used is a mixture of at least two non-aqueous solvents, at least one of said non-aqueous solvent having a propagation constant Cs to vinyl acetate of > 20 x 10<-4> at 70 DEG C. The products obtained are optionally saponified.

Description

Technical field [0001] The present invention relates to a transparent, melt rheologically defined organosiloxane copolymer with little movement, its hydrolyzate, its production method and its use. Background technique [0002] Vinyl ester polymers or (especially) solid resins of vinyl ester-ethylene copolymers have a tendency to often agglomerate. EP-A959114 discloses: Copolymerization with propylene can reduce the surface adhesive viscosity of vinyl ester-ethylene copolymer. It is also well known that silicone has excellent peelability; that is, it has a surface that repels adhesive substances. However, the performance of the blend of solid vinyl ester resin and siloxane is not good: because the vinyl ester polymer is incompatible with siloxane, phase separation occurs and / or siloxane domains are formed, so the solid resin becomes Into turbidity. Furthermore, the formation of siloxane domains and the appearance of unconnected siloxanes lead to the migration effect. [0003] Ther...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/42C08F261/04C08F263/04A61K8/72A61K8/89C08F283/12C08F290/06C09D131/02C09D143/04C09D151/08C09D183/07C09D183/10C09K3/18
CPCC09D183/10C08F283/12C08F218/02
Inventor 库尔特·施塔克罗伯特·辛格
Owner WACKER CHEM GMBH