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Ready to use spackle/repair product containing dryness indicator

A technology of indicator and thickener, used in coatings, multi-color effect coatings, etc., can solve problems such as complex problems

Inactive Publication Date: 2004-09-22
DAP PRODUCTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the face of it, adding a color changing indicator to such a product is straightforward, but the problem is further complicated by the additional requirement that the product must remain color stable during the pre-stock period and shelf life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Prepare a plaster formulation that includes UCAR 353 with phenolphthalein (PTL) as a color change indicator. Main component is as follows in this formula (the unit of all components is represented by gram):

[0091] Pluromic F-68 0.30

[0092] water 63.58

[0093] UCAR 353 19.2

[0094] Ethylene glycol 1.5

[0095] attagel 40 3.0

[0096] PTL0.03

[0097] KOH (45%) 1.5

[0098] vicron 45-3 210

[0099] Initially the pH of the mixture was around 12.68, but within a day this dropped to an unacceptable level of 9.57.

Embodiment 2

[0101] Another product was prepared with the following formulation:

[0102] Pluronic F-68 2.5g

[0103] CMC 7-H 6.25g

[0104] Water 511.19 grams

[0105] Ethylene glycol 12.5 grams

[0106] U CAR 413 150g

[0107] vicron 45-3 1780g

[0108] attagel 40 25g

[0109] KOH(45%) 12.5g

[0110] PTL 0.0625 g

[0111] The product is initially pink, but after about 4 weeks of storage at 120°F in an airtight container, the color of the product mostly disappears.

Embodiment 3

[0113] To maintain the desired color level, the amount of PTL was increased in the formulation:

[0114] The formula is as follows:

[0115] UCAR 413 106 grams

[0116] 281.8 grams of water

[0117] Pluronic F-68 2.5g

[0118] Ethylene glycol 15.00 g

[0119] attagel 40 25.00 g

[0120] vicron 45-3 1110.00 g

[0121] CMC 7H 2.1 g

[0122] KOH(45%) 4.4g

[0123] PTL 0.25g

[0124] Initially the product had a bright pink appearance with a pH of 11.01 and after about 5.5 weeks of storage at 120°F a rapid dissipation of the color was noticed.

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PUM

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Abstract

A ready to use patch repair product is disclosed that includes a color change indicator therein. After the product has dried the color changes to signal that, if desired, the worker can perform other operations such as painting, sanding, etc on the surface. In one aspect of the invention, a substantially ammonia and ammonium salt free latex polymer is used as the resin binder component. This provides enhanced color stability in the stored product.

Description

field of invention [0001] The present invention relates to plastering / refinishing products or powders which develop color when contained in water. This product will turn from red or blue to white after application and drying. Background of the invention [0002] Rendering compounds, joint compounds, and patching products have been used for many years to provide the desired smooth or textured finish on defective building elements such as wallboard, plasterboard, and other building surfaces . [0003] Typically these compounds contain resin binders, limestone, clay, lubricants, stabilizers and thickeners which are mixed with water to form a paste-like product. The paste product can be applied to the desired building element substrate with a spatula or other implement. The product is hardened by drying, so that construction workers can perform other operations on the hardened product, such as sanding, beating, painting and the like. [0004] To provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/06C04B40/00C09D7/00
CPCC04B2111/00672C04B40/0096C09D7/00C04B26/06C09D7/007C04B2111/00112C04B2111/72C09D5/29C09D7/41C04B26/04C04B2103/54C04B14/06
Inventor R·D·克普
Owner DAP PRODUCTS
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