JPS5851078A - Polishing fabric and paper - Google Patents

Abstract

A coated abrasive of improved resistance to <<loading>> comprising a flexible backing, a plurality of abrasive grit particles dispersed over the area of at least one surface of said backing, and at least one layer ot adhesive bond material adhering said abrasive grit particles to each other and to said backing, characterized by the fact that the outermost layer of said adhesive bond material comprises: (a) animal glue, or a cured amino resin, or a mixture thereof in an amount of at least 40% by weight of the total adhesive bond material, exclusive of any filler; and (b) at least 0.74 grams per square meter of an additive which is (1) a mono-, di-, and tri-organyl ester of orthophosphoric acid, (2) a salt of a mono-, di-, and tri.organyl ester of orthophosphoric acid with an amine, (3) a tetraorganylammonium salt, or (4) a soluble mixture thereof. Best results are obtained with a sizer adhesive of amino resin containing phosphate esters or their amine salts as additive.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an a-cloth paper made of an abrasive substrate having a plurality of abrasives adhered to at least one surface thereof. Abrasive coated papers are primarily used for shaping, sizing, or surfacing objects, commonly known as workpieces. Small particulate material removed from the workpiece and/or dislodged from the coated abrasive paper during processing is collectively referred to as swart. table @tl
Finally, the polished surface was polished,
Is it blocked and unsuitable for continued use? MK. The present invention relates to a coated abrasive paper that is particularly resistant to losses due to zeta grain.

An example of the common commercial manufacture of coated abrasive papers that resist clogging in the sanding of paints, primers, wood sealants, and a wide variety of other finishing compositions used on workpieces is disclosed essentially in U.S. Pat. No. 1,127,68886. is described.

This patent describes the production of a coated abrasive paper with a final abrasive side coating layer by applying a dispersion of a non-molten metal soap, preferably a soap, in a volatile liquid. The application of the metal soap is a new application process that is separate from the normal base adhesive layer and top adhesive layer application processes that are conventionally performed to achieve adhesion of the abrasive to the substrate. It is done. In some cases it may be possible to create a product with suitable properties without the use of a 5.E adhesive. Since the need for an additional application operation imposes labor and material costs compared to most other abrasive cloths 111, it is clearly an advantage to avoid it.

After publication of the above patent, other types of "third" coating layers (i.e.
Two adhesive layers (normal base and top coat and another coating layer)
Several patents have been published aimed at f', such as Canadian Patent 931,761 for polyvinyl acetate, US Pat. No. 8,304,2508 for polytetrafluoroethane and mixtures thereof, and US Pat. It is a mixture of plastic resin, elastomer and metal soap.

U.S. Pat. No. 1,130,43673 discloses the use of an oxygen-containing compound in either the third coating layer of the coated abrasive paper or the conventional base adhesive layer, with a very high backing binder-to-abrasive ratio. It is taught as an effective means of increasing the resistance of coated abrasives to clogging in the finishing of similar materials. All of the oxygen compounds specified in Jin's patent are neutral compounds and are not expected to ionize in aqueous solutions. US Patent IK3089763 is a polishing a
The use of polyoxyalkylene compounds in paper coatings is taught and the reduction of clogging is stated as one of its purposes. However, the teachings of this US patent are limited to overcoating compounds in which the main 4I component is an amino/° catalyzed phenolic resin.

The principal object of this invention is to provide a coated abrasive paper which has similar clogging resistance to products with a third layer of metallic soap, but which does not require a third layer. Other purposes will become clear from the description below.

By incorporating small amounts of the specific compounds and RF materials described below into the topcoat agent, a topcoat adhesive layer containing glue or aino resin can be applied to coated abrasive papers otherwise identical to those commonly used for frames. It has been found that it is possible to impart clogging resistance. These additives are all or partial alkyl esters of phosphoric acid, azate salts of partial esters of phosphoric acid, and ammonium salts having at least one long alkyl group or substituted long alkyl groups. A typical example would be the triethanolamine salt of 7- or di-decyl phosphate or stearamide globin-β-hydroxyether ammonium nitrate.

In the research leading to the present invention, conventional abrasive paper substrates, base adhesives and abrasives were used; It is universally applicable to all soybean products containing all such ingredients, including common commercial practices of all ranges of particle sizes, including at least . As is known to those skilled in the art, such components include, but are not limited to, paper weighing between 50 and 300 grams per square meter, a wide variety of fabrics manufactured (finished) in a wide variety of ways; There is also a parcant fiber. Abrasive material rXI! l
I-fused alumina, silicon carbide, garnet, di-:1'.

It can be Luconia arunna, emery, flint, or others, and the base 11 mHII can be kernels that are film-forming starches, animal hide glues, amino resins, and the like.

Table 1 lists IIA additives that have been found to be effective in reducing clogging when used in the top adhesive layer. These additives were most effective when used with amino resins such as urea-formaldehyde or melamine-formaldehyde. Such an amine resin has an equal weight i! phenol formaldehyde resins can be mixed with up to g of phenol-formaldehyde resins, amine resins of class -m can be mixed with other types of amine resins, and all amine resins or mixtures can be supplemented with finely divided solids, such as calcium sulfate,
It can be filled with crucian shell flour or any other known filler used in the manufacture of coated abrasive papers. Specification f
Although the performance of products coated with glue 7 is usually not as effective as with resin coats, as is true in the absence of the disclosed additives, natural glues of suitable types may also be used. It can be used as a top coating agent.

Additionally, other conventionally known materials, such as pigments or dyes, viscosity-reducing diluents, defoamers, etc., may also be used with the inventive JIl agents, if necessary or desired. can do. No negative interaction between such materials and the color additives of the present invention was observed. Amino tree W
A common component of W* of particular importance in adhesive formulations is the oxyamine useful for crack resistance taught by Duke in US Pat. No. 2,983,599, the entire specification of which is incorporated herein by reference. It is preferred to use the adhesive compositions taught by Deli et al. in combination with the a21D agents of the present invention, in which the outermost layer of the abrasive binder is an acid anhydride having a dissociation constant of at least the magnitude of 10-4. and a human oxyl or ether oxygen containing at least one (first a) group bonded to a tertiary carbon atom and bonded to a second carbon atom next to said tertiary carbon atom; The curing of the latent curing agent system consists essentially of an amino compound (which compound is present in a sufficient amount to raise the pH of the entire adhesive composition to a value of 6 to 9 before curing of the adhesive); It is preferred that the remaining residue is further mixed, and a preferred example of the amino compound is 2-methyl-2-
Aminopropatol, 2-amino-2-methyl-1,3
-propanediol, 5-amino-5-methyl-1,3
-dioxane, tris(hydroxymethyl)aztumethane, and 2-amino-2-ethyl-1,3-propanediol.

Also, the outermost next layer of the abrasive binder layer is at least 4
Preferably, it contains zero volume of donated glue or dry latex.

1s1 table (group people) Zelec NE Mue, De, Bon Tsuji
Fatty acid alcohol phosphate to be neutralized zelec NK E, 1. de1bon company
Fatty Alcohol Phosphate Mmafax L-10 Mona Industries Ethylene Oxide Based Surface Materials Monafax 786 Mona Industries Same as Mona fax L-10 (Group B) Em9hOI PS-400 Whitco Chemical
Complex organic phosphate Nisdel Monafax 785 Monai 7 Industries, Inc. MonafaX Same as L-10 Monafax H-15 Mona Industries, Inc.
Same length as Monafax L-10 (Group C) Cyastat SN American Cyanamid Co. Stearamide Cyastat SP American Cyanamid specification Globi-β-hydroxyethyl dimethylammonium salt (nitrate for SN, dihydrophosphate for SP) Muchloride and It should be noted that some of the additives listed in the table are acidic and can therefore catalyze the curing of amino resins. However, such practices The pot life of the amino resin may be shortened compared to the use of catalysts as taught by David Dale.Therefore, when practicing the present invention, if the additive is acidic, it may be necessary to incorporate it into the amine resin adhesive formulation. It is usually preferred to neutralize the resin adhesive with a suitable amine or ammonium hydroxide before adding it to the product.
The same resin and the same time and! It is possible to harden with a degree program. If necessary, it is preferred to neutralize the additives of the present invention with one of the oxyaquines taught by De Eke.

For example, 7. Since ELEC NE is neutral when supplied, it can be directly added to conventional compositions as described in the patented patent.
A'IM can be eventually mixed I/C together with the other ingredients (mentioned). On the other hand, since ZelecNK is acidic, it is first mixed, preferably with 2-amino-2-methylglopanol. , must be neutralized in a separate container and the neutralized mixture then added to such conventional compositions after all other ingredients have been added. The subsequent steps can be carried out in a conventional manner.

The minimum amount of additive H0 that gives an effective clogging resistance effect,
It was found that the amount corresponds to 74 grams per square meter. It is generally undesirable to use more than 10 weights of total upper 11 adhesive. This is because it is expected that the thermal deformation resistance of the top coat adhesive will decrease, which may reduce the polishing efficiency.゛Generally, 1 workable range d
0.74 to 13.3 grams per square meter of additive, preferred range #: t1.2 to 3.5 grams per square meter. This can be easily achieved by using additives in weight-bearing amounts. All additives listed in Table 1 are easily mixed with the amino resin or colloid suspension and are visible. Although it gave a homogeneous liquid mixture, in some cases the mixture had a hazy or milky appearance, indicating that it was a dispersion rather than a true solution. While there is no direct evidence of the tendency of additive-rich adhesive mixtures to become non-uniform under normal conditions of application, drying, or curing, there are no defects in each molecule during processing. Because of the preferred additive chemistry, which binds both ionic bonds and at least one long organic chain, these additives effectively reduce the surface tension of most liquid adhesives with which they are mixed. is expected. If such a reduction in surface tension does indeed occur, then the famous Gibbs equation for surface activity states that the surface active components are naturally distributed in equilibrium and a surface layer rich in surface active components is formed. Prophecies about Ruin. The spontaneous assembly of this additive in the surface layer indicates that the minimum amount of additive required to obtain an appreciable increase in II clogging resistance is related to the area of the abrasive paper product rather than the volume of the adhesive. This will explain why this was found.

The height and thickness of the top layer of leather products coated with the top coat agent containing the additives described herein should generally follow that of conventional products without a third layer of coating. be. In any event, the appropriate height and thickness as required can be readily determined by one skilled in the art of coated abrasive manufacturing.

Table 2 provides examples of specific products made in accordance with the present invention.

Table 1 shows Group A's 4. ! ! A group of additives with similar properties are shown in Table 1 when added to the amine resin overcoat adhesive layer.
i! All appeared to be approximately equal in ability to provide io resistance. A wide range of products containing these 57Jll agents in the top layer include paints, metal primers, enamels, lacquers,
have been tested in sanding workpieces and found that they generally have a longer useful life than conventional standard commercial products made for sanding such workpieces. Commercial products typically include a third layer containing primarily zinc stearate or similar metal soaps. Other additives listed in Table 1 are used in the top adhesive layer (to provide clogging resistance). Effective/[Enter the low raw group.

In the present invention, including the claims, the term "organyl" refers to all chemical groups that can be created by opening a monovalent bond in an organic compound. It includes commonly referred to groups such as alkynyl, aryl of phenylnato, and other simple group combinations and substitutions, as well as others. The term "long organyl" refers to an organyl group that refers to at least 8 carbon atoms linearly bonded to each other. Linear bonds include double bonds, tri-M bonds, and straight carbon-carbon bonds. In the description of the object (three-dimensional) of the abrasive material, the term r 1m J refers to the protective area that covers the entire territory of the abrasive material base material and has a substantially uniform composition. Virtually all of the materials! We object (solid)
should be considered to include all of the tl''. Since there are abrasives (particles) in the abrasive paper, the M1 appetizers used in its composition should be considered to include all of the tl''. Rather than the smooth, parallel surface dictated by n, it appears to have an extremely irregular outer surface.
The base and top adhesive layers mentioned above in the brief description of the common method of manufacturing coated abrasives are the final layer, as are any separate applications of metal soap intended to provide clogging resistance. It will make up the layers in the product.

Substantial uniformity of the composition of the adhesive layer is considered in terms of the adhesive layer. Similarly, the substantial continuity of the adhesive is not compromised by the presence of normal flex cracks in coated abrasives.

Below, the margin symbol explanation I/Z indicates the number of dry grams of the square meter tooth of the abrasive cloth paper.

Base material: 81 is 68117d kraft paper (Kimberly
Clark's 8tY1e 28729) *B
2 is slightly heavy kraft paper (Kimberly-Clark 5style 54729); B3 is James River 130 bond (220j/j) N cylinder paper (cylind@r paper); B4
These are 2070C embroidered jeans made by U-Tone.

Base adhesive: Ml is 82mm lipoise animal glue; M2 is Union, Carbide's Ucar 131 latex: M! Formaldehyde resin GPX-Jl-6-7' from Shea Pacific Co., Ltd.

Abrasive material: Gld) Laibach-U8um type 8WP
L Al construction; G2 is Type FRPL by Tribatsuba; Alumina: G3rj Type 51 Atsundam by Twotone; G4 is Garnet by Parton Mine; GS is Silicon Carbide by Twotone; Q
6r! It is a mixture of Type 577 Random from Twotone and NZ Alundum in a volume ratio of 6:4.

Top adhesive: 5ttz American, Cyanamid Nizi Arformaldehyde resin, type Beetle
7238-20: S2 is an area formaldehyde resin, type GPX
-Jl-6;83rL Pulcam Chemical Company Beet
7238-20 and phenolic resin 2535 in equal weight ratios.

patent applicant Two Tone Company patent application agent Patent Attorney Akira Makoto Patent attorney Kazuyuki Nishidate Patent attorney Tetsuji Furuga Patent attorney Akira Yamaguchi

Claims (1)

[Scope of Claims] 1. A flexible base material, a plurality of abrasive materials dispersed on at least one area of the base material, and at least one layer of abrasive materials adhered to each other and to the base material. and an abrasive binder layer, wherein said outermost layer of abrasive binder comprises (ml) at least 440% by weight of total abrasive binder in ml of all fillers tlkv% animal glue; hardening a) resin,
or mixtures thereof; and (b) at least 0.74 grams per square meter of mono-, di-, and tri-organyl esters of orthophosphoric acids; , (iii) a tetraorganylammonium salt, or a soluble mixture thereof; The coated abrasive paper of claim 1, wherein the additive has at least one long organyl group. 3. The outermost layer of the abrasive binder comprises a hardened area formaldehyde resin in an amount of at least 40% by weight of the total abrasive binder layer, excluding any filler. ! The abrasive cloth paper according to item 1111 or 2. 4. the outermost layer of the abrasive bond. (() an ammonium salt of an acid having a dissociation constant of at least 10"; and a hydroxyl or ether oxygen atom bonded to a carbon atom of the amide compound; the core compound is present in an amount sufficient to raise the DH of the entire adhesive composition to a value of 6 to 9 before curing of the adhesive. 5. The coated abrasive paper of claim 11113 further comprising a post-curing residue of a latent curing agent system consisting essentially of: 2-amino-2-methyl-1゜3-propanediol, 5-amino-5-methyl-1,3-dioxane, tris(hydrocyclic)methane, or 2-amino-5-methyl-1,3-dioxane,
Claim 1 which is annor-2-ethyl-1,3-propanediol! ! Polished cloth paper with 114 items. 6.1 The coated abrasive paper of any of claims 11111 to 5, wherein the next outermost layer of the abrasive binder layer of paragraph 1R comprises at least 40 volumes of animal glue or dry latex.