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Core-shell polymers suitable for use in organic media

A technology of polymer particles and media, which is used in devices, coatings, etc. to apply liquid to surfaces

Active Publication Date: 2012-08-15
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various previously disclosed core-shell polymers fail to meet this need

Method used

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  • Core-shell polymers suitable for use in organic media
  • Core-shell polymers suitable for use in organic media
  • Core-shell polymers suitable for use in organic media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 14

[0064] Example 14 Preparation of Coating Compositions Preparation of solvent-based alkyd pigment-free coating compositions. The following components were added to a water-cooled grinding kettle and mixed for 15 minutes at high shear rate (3000 rpm) using a Cowles-type mixing blade. During this process, the temperature of the milling was maintained at approximately below 30°C.

[0065] Table 14.1 Low Aromatic Formulations

[0066] Material

Content (g)

Beckosol TM 10-060

469.5

Odorless mineral spirits

52.0

Bentone TM 38

4.3

Anti-Terra TM -U

2.1

Mix for 5 minutes

Kelecin TM f

8.5

Cobalt Nap-All TM 6%

2.8

Calcium Nap-All TM 4%

5.5

Zirconium Hex-Cem TM 6%

3.1

Skino TM #2

2.7

toluene

0.0

Odorless mineral spirits

58.8

[0067] For some tests, some of the odorless mineral spirits ("OMS") was removed and replace...

Embodiment 15

[0076] Evaluation of the coating composition of embodiment 15

[0077] The coating was pulled down over a Leneta 5C opaque card using a 7 mil Dow rod, allowed to dry completely, and then the reflectance was measured with a Byk-Gardner color guide 45° / 0° reflectometer. Record the Y reflectance (Y). The thickness of the card and the card with the applied film was measured in mils using an electronic Mitutoyo scale comparator. The difference between these measurements is the thickness (T) of the film. The scattering of the paint comprising core-shell polymer particles was calculated per mil film thickness using the following formula:

[0078] S=(Y / (100-Y)) / T. Thermal aging disintegration was calculated based on scattering before and after thermal aging. In Table 15.1, the organic medium composition is 97% by weight OMS / 3% by weight toluene. In Table 15.2, the organic medium composition is 100% by weight OMS.

[0079] Table 15.1 Evaluation of Coating Compositions

[0080] ...

Embodiment 16

[0085] Example 16 Calculation of Solubility Interaction Parameters

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Abstract

The present invention relates to a core-shell polymers suitable for use in organic media, in particular the invention provides a core-shell polymeric particle, the core including, when dry, at least one void and the shell including, as polymerized units, from 18% to 50%, by weight based on the weight of the shell, monomer selected from the group consisting of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, and mixtures thereof. is provided. Also provided is a composition including an organic medium and a core-shell polymeric particle, the core including, when dry, at least one void and the shell having a calculated shell-organic medium interaction parameter, X PS > 1.15; the invention also provide a method for providing opacity to a dry composition.

Description

technical field [0001] The present invention relates to core-shell polymer particles suitable for use in compositions comprising certain organic media, which polymer particles are capable of providing a useful level of opacity in the dried composition. More specifically, the present invention relates to a core-shell polymer particle, the core comprising at least one void when dry, and the shell comprising 18-50% by weight (based on the weight of the shell) of Monomers selected as polymerized units from acrylonitrile, methacrylonitrile, acrylamide, methacrylamide and mixtures thereof. In addition, the present invention relates to a composition comprising an organic medium and core-shell polymer particles, the core comprising at least one cavity in the dry state, the calculated shell-organic medium interaction of the shell Parameter X PS > 1.15; The present invention also relates to methods of providing opacity to dried compositions such as coatings. Background technique ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F257/02C08F265/08C08J9/00C08L51/00C09D151/00B05D7/24
CPCC09D151/003C08F265/02C08F265/04C08L51/003C08F265/00C08L2666/02C08F265/06C08F265/08C08L51/00C08F2/22
Inventor J·K·巴德曼K·A·布鲁姆D·M·法萨诺
Owner ROHM & HAAS CO