US1998907A - Interior plaster wall - Google Patents

Description

April 23, 1935.

E. RQBERTS INTERIOR PLASTER WALL F'iled Feb. 15, 1932 Patented Apr. 23, 1935 UNITED STATES PATENT OFFICE mesne assignments, to Company, New York,

New Jersey United States Rubber N. Y., a corporation of Application February 13, 1932, Serial No. 592,689

10 Cla.ims.

This nVention relates to nteror plaster wa1l constructon and the methods for producing a more flexble interior plastic compositon and one Which w1l net ha've the usua.l brttleness whch 5 invarably results in the formaton of a. number of smalloracks.

I-Ieretofore, it has been common practice so incorporate hair and other fibrcius materia-15 in interor plaster wall compositions in an elort to bond. the material together and prevent cracking of the plaster Wal1. The use of such materia-1 results in an apparent increased toughness of the plaster composton end genera,lly prevents the plaster from fallngafter it has cracked. However, no increased flexibility can be obtained by this mthod end although the plaster s prevented from fallng in largo pieces after it has oracked, the treatment With hair and other fibrous materials in no way prevents the formaton of the cracks themselves in the wall. Sometmes a fabric is applied to the wall surface and the fabric covered wa1l papered to prevent cracking. Varous chemicals have been used in plaster compostons in order to hasten the settng end ncrease the hardness of the walls, but in none of ,these methods iS an ncreased flexibility produced nor any apprecable decrease in the teridency o the plaster wa1l to.crack. o 1 V Several embodiments of the inventic'm are illustrated. in the accompanying drawng, in which:

Figure 1 illustrates a plaster wa1l over which paper or fabric is appled; and

Fig. 2 llustrates a, plascer wall over which a layer of paint s appled.

In carryng out my nventon,l apply che plaster wa,ll to a suitable base, Wth or without the addton of. har, or other fibrous material to the oompo3iton, n'a, manner well known in the art. While the wall is still web, or, f desired, after it has partly or wholly dried, I app1y by spraying, bru'shing, or spreading an aqueous dspersion of rubberto the wall or celing surface. The rubber materal may be natural latex or an artifical disperson of rubber or rubber-like material and may be unvulcanized, or pre-vulcanized, or mixed with compoundng ngredents includng well known ultra accelerators which will vuloanze the rubber deposit from such dispersion ai; normal temperatures under atmospheric conditions. It is also desrable to dilute the dispersion to a viscosity permttng ready absorption into the surface of the plaster material, and in order to further aid in the penetration, I may add to the Iatex compostion a. wettng or penetrating agent such as sulphonated. castor oi1; ortho toluidine, Nekal,

or other well known penetrating compositions. Where a Wall paper or sutable fabric is to be applied to the p1aster surface subsequent to the tratment wth che rubber composition, it isdesirable to use a, thn enough dispers'on oi rubber so that it will penetrate into the interstices of the wall and not form a contiriuous film over the surfase. In this wa,y, after drying, a reinforcing end flexble web of rubber materal acting to bond the partcles o=f plaster together Will be formed in the nteror of the wall and after the paper or fabrc has been applied to the surface by the usual adhesve materials such as fiour or starch pasfie and the like, the wall is still able to breathe through the paper or fabrc, as s desira,ble in this type of construction. Such a struoture is ilustrated in Figure 1 where a plaster wall I that has been treated With an aqeous disperson of rubber so that the disperson penetrated into the wall to form a reinforcing web in the nteror of the same is covered With a, layer 2 of paper or fabric material. However, where the wall is to be sub-sequently painted. With a oontihuous film of pant, rather than papered, 11; is perhaps Vdesra.ble to apply che rubber dsperson so that a. coritnuous film of the same s formed on the surface of the wall. 'Ihus in addition to the rubber penetretng into the plaster wall and formng a renforcng end fiexbe web of rubber in the nterior of the wall actng to bond the partcles together, a1continuous film of rubber s a.lso formed on the surfaoe thereof; 'I'his continuous film When dred, in addton ho ncreasing the fiexblcy of the wall, also forms an excellent adhesve base for the paint material applied to the finshed wa1l sur fece. Such a structure is llustrated in Figure 2 where a plaster wall 3 has been coated Wth a, contnuous film 4 of rubber deposted from'an equeous dispersion of rubber and the rubber film 4 covered. wth a continuous layer of pant 5. In some cases t s desirable to apply a contnuous film of rubber dspersion to a wall thai; s to be covered Wth paper or fabric end app1y such paper or fabrc to the wall surface freshly wected wth the continuous film of dspersion prior to dryng in order to secure adhesion by a common' bond between the paper or fabric and the rubber in the interim of the wall through the continuous rubber film at the surface.

As a specific illustration of one manner of carry1ng out the nvention, without intention to 1imit 'the nvention except as 'requred by the pror art, the following example is included: Tu 9, plaster wall surface either web, partially dry,

or dry, the following compositi0n ma.y be applied by sprayng, brushng, or by some other sutable manner.

Parts Latex (solds) 100 Penetratng agent 2 to 5 Glue 3 Ultra accelera-tor 1 Zinc oxide 2 Sulphur 3 Anti-oxdanx'; 1

Latex s che ruboer disperson used as an 11111s tretion in the above example, and should preferab1y heve a. solids content of from 18-25%, although it may, under certan crcumstanees, vary from 10-60% solide content. The Iatex may be of normel consistency, or dluted, or concentrated as by evaporaton, creeming or centrifugng, end is preferaby alkelne wish a hydrogen on concentraton of epproximetey p-I 10 to 12, although the hydrogen ion concentraton mey vary wthin wider limite es rom a pH 01" 7 to 14. Other equeous dispersione of rubber, such 2.5 araifical dispersione of crude or 1eclaimecl, rubber, G1 of rubber substtutes or synthete materiale rsesembling rubber may be and it s to be understood that the termaqueous dispersione of rubber ncludes the same. The wettng or penetraaing agent f ncuded, may be sulphonated cestor 011, orho te ludne, Nekal, or other well known wettng me.- t-erials, and. the ultra acceleretor end. entkexcxant may be any of the well known products now in gene1al use in the art. The rubber disperson, if desired, need. net eontain vueenzng ingredents. in whch case the rubber depost in the plaster wa,1 w1 noi: be vulcanzed. The treated pester wall s dred end paper or mbrc, or a pa:lnt surace eppled tner to. Wth a peint surface, t s desirable to vuoanze the depost appled io the wall in order to reduce to a min mum a.ny possible residuel tackiness of the painbecl surface. The term pester es used throughout the descrpton ami claims is to be nterpreted broadly end in adcton to ordnary plasuer surfaeed wal'is inenced. to include stucco surfaces, eomposfcion plaster board contenng plaster embedded 1e,ths faeed wth card board and plaster compostons eontenng har, oaher fibrous materiale, chem eals and the like.

In view of the many changes end modificatons thai; may be made houa deperong from the prineples underlyng the nvention, reference should be made to appenocl claims for an un.erstancng of the scope of the nvennon.

I-Ieving thus descn'bed my inventon, what I eam end desre to protect by Lettere Patent is:

1. In a.n interim wal1 construction, a, surface comprsn plaster havng a renforcng end fiexible web of vuloanzed rubber actng to bind the plaster partcles together.

2. In an interim wa1l construction, a surface comprising plaster havng a reinforcing end 1exib1e web of the solide depost of an aqueous dispersion of rubber e,etng to bnd the plaster partcles together.

3. In an nterior wal1 construction, a surface comprislng a pla.ster aggregate, che parteles 0f whch are bonded together ai: least in pari; by a renforcing end. flexble web of the solds depost of an aqueous dspersion of rubber, said rubber beng vulcanzed.

4. In an interior wa11 constructon, a, surface comprsing a, p1ester aggregate, tne particles of Whch are boncled together at least in pari: by a renforcng end fexble web ci che solide depost of an aquecus dispersion of rubber end a layer of paper or fabrc over sad. plaster.

5. In an interor wa11 constructon, a surface comprisng a plaster aggregate, t'ne partcles of which are bonded tog'ether at least in pari; by a reinforcing end fiexble web of ;the solide depost ci ero aqueous dispersio-n of rubber, end a contnuous 1ayer of rubber on seid surface.

6. The method of eonstruetng wal1 interim Whch eomprseg applying p1e.ster to a sutabe base end appying an aqueous disperson of rub ber te said paster te form e renfcrcng end fiexible web of rubb-ef materel ectng se bond the partces 0:" paster togethex, dryng end vusanzing sad rubber.

"1. The method of co'nstructing wa11 interim which eompises appyng plester no a, sutable base end sprayng an aqueous dsperson 01" rubbea: on sex-id pester te form e renforcng end flexble web of rubber meteral ectng to bond the paric1es of plaster together.

e. The methoc o1" improvng the fiexo'lity end reducng the cracking tendency of plaster walls which comprises treatng seid walls wth an aqueous disperson ci rubber to forno a renforcng end flexble web 01 rubber materal aeting te bond che partcles of paster together.

9. The method of constructing wall interim w" ch comprises applyng plaster te a sutable base, appyng an equeous dispersion cirubber to seid p1aster to form e, renforcng end fiexble web 0)? rubber materal actng te bond Che particles 0f p1ester together, end applying paper or febrc to sad treated. plaster.

10. The method of construccing wa1l nteror whch comprises applyng, plaster to a suitable base, end applyng an aqueous dsperson of rubber to sad plaster to form a renforcng end fiexble web of rubber meteral acting to boncl the partcles of plaster together.

ELMER RG'BERTS.

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