JPS6098051A - Silicon single layer roofing structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Light's back resistance The present invention relates to roofing structures such as buildings.

More specifically, the present invention protects roof sheets from atmospheric elements such as sunlight, cold, and other existing -6 new ones.
Relates to silicone single-layer roofing structures that protect against the effects of V-dew on rain, wind, flakes, etc.

In most cases, roofing generally involves the lower structure,
A protective layer is deposited, typically starting with the roof shingles. To install a so-called flat roof, spread tar or IC or other 41-layer adhesive either directly on the roof shingles or on a substrate layered over the shingles, such as asphalt-impregnated felt, and then apply a woven fabric to this organic material. or press the non-woven fabric (b) and then apply a second coat of asphalt 1- or other adhesive and the woven or non-woven fabric II until reaching at least the minimum thickness necessary to ensure weather resistance. Apply the second layer without repeating.

A major problem with such Formula C is that the physical properties of the layer deteriorate due to exposure to the elements, resulting in brittle cracking and allowing water ingress.

J. Interaction of commonly used organic materials with ultraviolet light:
Shrinkage of the seam 1- also occurs, which leads to water leakage at edges, seams and seams. Lack of compatibility with the bonding or adhesive layers used with various conventional roofing sheets has also been recognized.
As a result, the lap joints open up, where the wind can fan the composite layer and tear it off, again leading to water intrusion.Numerous proposals have been made to improve the method of wiping the roots, but none of them have been proposed. It wasn't completely satisfying. No. 4,293,597 to Bcssmer et al., assigned to the present applicant, discloses a method for forming a roofing composite layer by applying an adhesive silicone rubber two-part composition to a roofing substrate. has been done. Such compositions adhere very strongly and form an adhesive bond between the roofing substrate and the coating, but the integrity of the coating is compromised when objects such as stones or balms strike it. Tend.

On the other hand, U.S. Pat. No. 4,297,265 to QIS (3n) discloses flexible substrates, e.g. The problem with this solution, as mentioned earlier, is that the adhesion is lost due to lack of compatibility between the materials. Merely applying silicone-coated woven glass fabrics to conventional multilayer systems does not in any way avoid the tedious procedure of building up the roofing layers one by one as described above. Fabric-silicone elastomer composites are also known for other purposes, such as Woodroof, U.S. Pat.
No. 03,712 discloses that waterproofing 111 made from knitted fabric coated with heat-cured silicone rubber is suitable for use in athletic wear, and that room temperature vulcanizable silicone is used to seal the overlap seams of such knitted fabric. It is described that it is used. U.S. Pat. No. 4,318 to Kaimoto et al.
No. 949 describes how non-woven fabrics impregnated with room-temperature vulcanizable organosilicones have a smooth-to-the-touch, fuzzy surface.

The roofing structure of the present invention has a composite structure that includes a heat insulating base and a silicone single-layer woven fabric reinforcement membrane as essential requirements.
It can be distinguished from the prior art by this. Since this film is made of silicone and glass, the sheet can withstand exposure to the elements, especially UV rays! It shows no loss of Il-like properties. Either the crotch must be completely adhered to the base with a silicone pressure-sensitive adhesive, or the periphery must be sealed with a silicone sealant and ballasted. This ensures chemical compatibility between the roofing sheet and the substrate, and also applies silicone to any lap joints to prevent bond failure and eventual failure.

According to the present invention, the roofing structure includes (a > roof shingles (deck), (b) a roofing base overlying the roof shingles, and (C) a cured room temperature vulcanizable silicone overlying the roofing base (b). a rubber-coated monolayer film (C), (d) a silicone rubber pressure sensitive adhesive, (ii>(e)
) 11 above! (c) a bead of silicone sealant along the periphery of the roofing shingle, said bead of silicone sealant intermingling with the ballast layer of roofing shingle to bond said membrane to the roof, or (iii) said means ( i) (ii) (7) Union 1! Niyotte said base (b)
It is characterized by being strongly bonded to.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As will be apparent from the foregoing and subsequent detailed descriptions and specific examples, the present invention provides a significantly improved single layer silicone roofing structure with unique properties and advantages. Other advantages of the invention will be apparent from reading the description below.

DETAILED DESCRIPTION OF THE INVENTION The drawings showing preferred embodiments of the present invention will be described. FIG. 1 shows a part of the flat roof 10, and this roof 10 I
J IAi consists of a composite system including a base plate (deck) 12, a base 14J7 and a glass-silicone monolayer film 1-6. This example includes a bonding layer 18 of silicone pressure sensitive adhesive (
:)It is shown. As discussed below, this adhesive layer can be eliminated and edge sealing and ballasting can be used in its place.

The single layer (single layer) membrane 16 is made of a pourable silicone-corrugated room temperature vulcanizable (RTV) composition with glass woven II.
It is constructed by coating on top. A woven glass cloth can be laid in place and properly coated with RTV silicone;
Preferably, the membrane is prefabricated and the ready-made membrane is placed at the end use site.

This procedure minimizes the construction process. A suitable silicone-liquid system for b19f in either case is the well-known J: Uni,
The composition consists of a composition in which the components of Libet are mixed together with a catalyst system, and the composition is stored in an anhydrous state.The composition does not harden unless moisture comes into contact with the composition. When coated or applied by dipping or other conventional means, the composition is exposed to atmospheric moisture or other types of moisture and rapidly cures to the final rubber state. - Corrugated RT
V silicones are commonly classified as J by-products generated during curing. The most common by-products are acetic acid, oximes, and alcohols. 1 to amine. Since acetic acid-free RTV silicone has excellent physical properties d3 and weather resistance, it can be used to obtain a membrane suitable for the present invention. Compositions used to coat woven glass fabrics are described in [3rLllllOr U.S. Pat.
016, Example 1, i.e. 16.74 parts of hydroxylated dimylsiloxane oil are mixed with 2.23 parts of methyltriacetoxysilane J3 and 10.15 parts of hydroxylated dimylsiloxane oil. of trimethylsilyl-terminated dimethylsiloxane oil (2 centistokes). The mixture is heated to 100° C. under reduced pressure for 1.5 hours to remove acetic acid as it forms. Residual acetic acid, excess methyltriacetoxy The silane and 2cs dimedylsiloquiline oil are removed by vacuum distillation.

The residual oil is storage stable under moisture exclusion and hardens to a rubber product in 1 to 1.5 hours when exposed to the atmosphere.

In order to easily coat the glass fabric, a low Ht solvent such as toluene or petroleum ether can be used as a thinner.
It is appropriate to add C.

General Catholic Co., Ltd. (New York, U.S.A.)
- One wave type R' T available from Turf Ord
V composition, RTV-112 can be used in part.

According to conventional techniques, the silicone composition is applied neat or dissolved in a solvent and applied with a brush or a doctor blade.
1. Applied to glass woven fabrics by blowing, roller coating, etc. The thickness is adjustable and depends on the particular operation employed. Upon exposure to moisture, curing occurs to form the outward facing silicone rubber surface of the composite membrane 1G.

As above, the structure of the present invention can be applied to existing roof shingles and new shingles 12, which can be wood, metal, concrete, brick, plastic, etc.

Shown in Figure 2-! J' First, the roofing insulation base 14 is laid on the roofing board 12. The substrate 14 can be constructed of conventional materials, typically, but not limited to, urethane foam board, vermiculite, spray foam, or asphalt impregnated felt. The thickness of the base 14 is not important;
;-The street is fine. Next, the silicone film 16 is applied to the heat insulating base 14.
The RTV silicone composition is then overlaid by any of a variety of methods, such as by laying down a woven glass fabric and overcoating the RTV silicone composition, or by laying down a prefabricated membrane. If a ready-made membrane is used, the membrane 16 can be fully adhesively bonded to the insulating substrate 14 or sealed only along its periphery and ballasted, ie, held down by roofing gravel weights 20.

In addition, when using the in-situ formed film 16, the heat insulating base 14
a silicone adhesive layer 18, to ensure adhesion to the
Preferably a two-component pressure-sensitive adhesive is used for QUj. The reason for this is that the adhesive layer 14 and the film 16
This is because it improves compatibility with Pressure-sensitive silicone adhesives have a longer pot life than conventional organic adhesives, and their lower viscosity allows installers to cover larger areas ( square feet per gallon), lowering both total city and material consumption.

In a preferred embodiment of the invention, a prefabricated membrane 16 is applied to the insulation substrate 1.
Lay it on the floor layer 18 of the silicone pressure-sensitive adhesive that has been evenly spread on the surface of the silicone pressure-sensitive adhesive layer 18, and press it firmly into contact with the adhesive (-+
4Jru. Pressure sensitive adhesives are conventional materials, such as those described in US Pat. No. 3,017,384 to Modic, issued to the applicant
The two-component resin compositions described in this issue can be used. Chemically, these compositions are comprised of hydrolyzable trialkylsilanes, co-hydrolyzed mixtures of alkylsilifutes, and high viscosity organopolysiloquiline oils also having silicon-bonded human 1-do-1-cy end groups. Become. These ingredients are dissolved in a solvent such as 1 to toluene and then a suitable catalyst such as zinc octoate, dicumyl peroxide, te
- Mix with butyl titanate, γ-amitub 1-1 pill (-ethoxysilane, etc.) and then apply to the insulation substrate 14. When the solvent evaporates, a layer 18 of pressure-sensitive adhesive silicone remains.Glass- The silicone composite membrane 16 adheres strongly to this adhesive layer 18, while the adhesive layer 18 adheres firmly to the insulation substrate 14.

Two-part pressure sensitive adhesives suitable for the present invention can also be made from commercially available materials as follows.

Ingredient Weight HL Part Δ Resin (product number 1) SA-6573゜General Electric IR) 100 or resin (product number PSA-529゜General Electric) 100 thiadan γ-aminopropyl 1 to ethoxy Silane 2.3~4
．． 3 or benzoyl peroxide 2.3-4.3 Mix just before part A and fill 1 minute I3.

According to another feature of the invention g! When the edges of the silicone composite membrane 16 are to be joined together, run a bead 22 of silicone rubber sealant (described below) along the entire periphery of the silicone composite membrane 16.
and building penetrations, pipes (24 in Figure 2), double presser foot 2
8, etc., to form a crosslinked seal. If edge sealing alone is to be relied upon, methods of maintaining the membrane 16 in contact with the insulating land 14 may be used for ballast construction, i.e. gravel or roofing.
It is possible to adopt a method of holding down with 20 SX racks per rack.

Of course, a combination of an edge seal with ballasting and a uniform adhesive layer 18 can also be used.

When a single layer silicone rubber membrane 16 is made from a sealing material and is cut from a 1-1-1 length of appropriate length, e.g., 3 to 4 feet wide, a lap seam of, e.g., 3 to 6 inches is provided, and the Preferably, the laps are spliced with a silicone adhesive layer 30. The silicone adhesive comprises a pressure-sensitive adhesive, preferably the same adhesive used to form layer '18. , silicone sealan 1
Run the bead 32 along the top side of the lap joint to ensure integrity.

Edge seals 22 around pipes, penetrations, double pressers, etc.
The silicone sealant used as the upper peal 32 of the lap joint is a conventional one-wave silicone sealant consisting of a moisture-responsive, low modulus composition containing conventional additives and fillers to ensure adhesion to a variety of substrates. Model RTV44
It is a fee. These materials are readily available from a variety of sources, such as General Electric Co., and are described in US Pat. No. 4,100,129, 11
5J: Bi3111ith et al. U.S. Patent No. 4.273,6
It is described in No. 16. For roof coating systems: °C1 A one-component (containing titanium chelate catalyst) material with the following composition, especially polydimethylsiloxane 1 kylin stearate 11j Calcium carbonate (filler) 10
0 Diphenyl Copolymer Oil (Chicken Trope Agent) Methyltritrioxysilane (Crosslinking Agent) 0.51.3-
205 parts of the dry mixture of the first three components) are mixed with a total of 43.05 parts of the last three components and the mixture is kept free from moisture until use. Store in sealed packages with no contact.

It will be apparent to those skilled in the art that various other forms of seams may be used. For example, instead of lap joints, butt U
Seams can be provided. The butt U-seam can be sealed with a bead of sealant. Alternatively, the butt seam can be covered with an elongated strip of fabric or other covering material, and the edges can also be sealed, if desired. More than two layers (brie) of the covering woven membrane 16 can be used, but the main advantage, simplicity of construction, is lost and the increase in integrity is not significant, if any.

Instead of woven glass fabrics, glass knits, non-woven fabrics such as mats or felts can be used, and instead of glass other materials such as woven mats, woven fabrics or inorganic fibers can be used.

Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the products and techniques described herein without departing from the spirit of the invention.

[Brief explanation of drawings]

FIG. 1 is a perspective view, partially in section, of a flat roof manufactured according to the invention; FIG. 2 is an enlarged view of a portion of FIG. The embodiment is shown and the seal of the lap joint is shown. Explanation of main symbols 10...Roof, 12...Roof board, 14...Substrate, 16...Single layer film, 18...Silicone pressure sensitive adhesive, 20...Gravel, 22. ...peed, 24...vibrator, 28...both presser feet, 30...silicone adhesive, 32...peed. Sexual applicant Lneral Electric Company representative j11! Man
(7630) Iku Numa Nori 2 Engraving of the drawing (no changes to the content) 1Z 1, Indication of the incident 3, Address of the person making the amendment 107 14-14 Akasaka 1-chome, Minato-ku, Tokyo Drawing 7, Contents of the amendment As shown in the attached sheet. However, there are no changes to the contents due to the engraving of the drawings.

Claims (1)

[Claims] 1. (a) a roofing board, (b) a roofing base overlapping the roofing board, and (C) a roofing base coated with cured room temperature vulcanizable silicone rubber overlapping the roofing base (b). (1) (d) silicone rubber pressure sensitive adhesive; (it) (e)
) a bead of silicone sealant along the periphery of said membrane (C), said silicone sealant bead combining with a ballast layer of roofing shingles to bond said membrane to the roof; or (iii) said means N). and (ii)
A roofing structure characterized in that it is firmly bonded to the base (b) by a combination of the following. 2. The monolayer film (C) is coated with a silicone rubber pressure sensitive adhesive (d
2. A roofing structure according to claim 1, wherein the roofing structure is bonded to the base (b) by a. 3. The roofing structure according to claim 1, wherein the base is a urethane foam board, vermiculite, blown urethane foam, or asphalt-impregnated felt. 4. The roofing structure according to claim 1, which is formed by curing the cured room temperature vulcanizable silicone rubber into a castable one-component composition. 5. A roofing structure according to claim 1, wherein said silicone pressure sensitive adhesive (d) is formed by reacting a two-component composition. 6. The roofing structure according to claim 1, wherein the single-layer membrane (C) is constructed by splicing a plurality of sheets, and the seams between the sheets are bonded with the silicone rubber pressure-sensitive contact agent (d). . 7. Apply the single layer membrane (C) at the edges of the pipe, penetrating object, and both pressers if there are any, and on the upper side of the lap joint (e
) A roofing structure according to claim 1 or claim 6 sealed with a silicone rubber sealant. 8. A roofing structure according to claim 7, wherein said silicone rubber sealan (l-<8) is formed by curing and coating a one-component catalyst-containing composition. 9. The roofing structure of claim 8, wherein said silicone rubber sealan h(e) is a moisture curable composition containing a catalytic amount of a titanium chelate catalyst.