METHOD FOR JOINING PIPING SYSTEMS AND PIPING TO EQUIPMENT, FIXTURES, DEVICES, STRUCTURES, AND APPLIANCES

• US 20090173441A1
• Filed: 02/17/2009
• Published: 07/09/2009
• Est. Priority Date: 08/13/2003
• Status: Abandoned Application

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Inventors: Wu, Shaofu, Sehanobish, Kalyan, Sonnenschein, Mark F., Damen, Julien, Lutz, William G., Donald, Robert J., Courter, David M., Spaulding, Wesley J.
• Application Number:
  US12/372,299
• Publication Number:
  US 20090173441A1
• Time in Patent Office: Days
• US Class Current: 156/296
• CPC Class Codes: B29C 65/483 Reactive adhesives, e.g. chemically curing adhesives
• CPC Class Codes: B29C 65/485 Multi-component adhesives, i.e. chemically curing as a result of the mixing of said multi-components
• CPC Class Codes: B29C 65/7829 said distance pieces being integral with at least one of the parts to be joined
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/1222 comprising at least a lapped joint-segment
• CPC Class Codes: B29C 66/1224 comprising at least a butt joint-segment
• CPC Class Codes: B29C 66/5221 for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• CPC Class Codes: B29C 66/55 sealing elements being incorporated into the joints, e.g. gaskets B29C66/52296 takes precedence
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/72321 consisting of metals or their alloys
• CPC Class Codes: B29C 66/73774 the to-be-joined areas of both parts to be joined being semi-crystalline
• CPC Class Codes: B29C 66/7392 characterised by the material of at least one of the parts being a thermoplastic
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/7394 characterised by the material of at least one of the parts being a thermoset
• CPC Class Codes: B29C 66/73941 characterised by the materials of both parts being thermosets
• CPC Class Codes: B29K 2023/00 Use of polyalkenes or derivatives thereof as moulding material
• CPC Class Codes: B29K 2023/04 Polymers of ethylene
• CPC Class Codes: B29K 2023/06 PE, i.e. polyethylene
• CPC Class Codes: B29K 2023/10 Polymers of propylene
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2025/04 : Polymers of styrene
• CPC Class Codes: B29K 2027/06 : PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2055/02 : ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2101/10 : Thermosetting resins
• CPC Class Codes: B29K 2101/12 : Thermoplastic materials
• CPC Class Codes: B29K 2705/00 : Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
• CPC Class Codes: B29L 2023/22 : Tubes or pipes, i.e. rigid bent tubes not for use as pipe couplings B29L2023/004
• CPC Class Codes: B29L 2031/7172 : Fuel tanks, jerry cans
• CPC Class Codes: C09J 2400/166 : in the pretreated surface to be joined
• CPC Class Codes: C09J 2400/226 : in the substrate
• CPC Class Codes: C09J 2423/006 : in the substrate
• CPC Class Codes: C09J 4/00 : Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
• CPC Class Codes: C09J 4/06 : Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
• CPC Class Codes: C09J 5/00 : Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
• CPC Class Codes: C09J 5/06 : involving heating of the applied adhesive
• CPC Class Codes: F16L 13/103 : Adhesive joints for hoses F16L33/34

Abstract

A method to join pipe is disclosed using a curable one or two part adhesive composition comprising an effective amount of a boron containing initiator compound such as an organoborate, a stabilized organoborane complex, or combinations thereof; one or more monomers, oligomers, polymers or mixtures thereof having olefinic unsaturation which is capable of polymerization by free radical polymerization; and optionally a decomplexing agent.

Claims

1. A method for joining an end of a pipe having a first surface to a fitting having a second surface comprising the steps of:

(i) applying an effective amount of a curable one or two part adhesive composition to the first surface of the end of the pipe, the second surface of the fitting or to both surfaces, wherein the adhesive comprises

(a) a boron containing initiator compound,

(b) one or more monomers, oligomers, polymers or mixtures thereof having olefinic unsaturation which is capable of polymerization by free radical polymerization, and

(c) optionally a decomplexing agent and

(ii) joining the first surface of the end of the pipe with the second surface of the fitting.

2. The method of claim 1 wherein the end of the pipe comprises a spigot having an exterior surface and the fitting comprises a bell having an interior surface and an open end for receiving the spigot whereby

(i) the curable adhesive composition is applied to the exterior surface of the spigot, the interior surface of the bell or to both surfaces and

(ii) the fitting and the end of the pipe are joined by inserting the spigot into the bell.

3. The method of claim 1 wherein the pipe and the fitting independently comprise a metal, a multilayer plastic, a multilayer composite, a thermoplastic, a thermoset;

or combinations thereof.

4. The method of claim 1 wherein the pipe and fitting are thermoplastic.

5. The method of claim 1 wherein the pipe and the fitting independently comprise a polyolefin;

acrylonitrile, butadiene and styrene terpolymer;

polyvinyl chloride;

chlorinated polyvinyl chloride;

or blends thereof.

6. The method of claim 1 wherein the pipe and the fitting comprise polypropylene.

7. The method of claim 1 wherein the pipe and the fitting comprise polyethylene.

8. The method of claim 1 wherein the pipe is a first thermoplastic and the fitting is a second thermoplastic different from the first thermoplastic.

9. The method of claim 1 wherein the boron containing initiator compound (a) comprises at least one of:

(a i) an organoborate having the following structure;

10. The method of claim 9 wherein the amine in the organoborane amine complex (a iv) is a primary amine;

a secondary amine;

a polyamine having primary or secondary amines or both;

ammonia;

polyoxyalkylene amines;

the reaction product of a diamine and a difunctional compound having moieties which react with an amine, wherein the reaction product has terminal amine groups;

aryl amines;

heterocylic amines;

a compound having an amidine structural component;

aliphatic heterocycles having at least one secondary nitrogen in the heterocyclic ring wherein the heterocyclic compound may also contain one or more additional secondary or tertiary nitrogen atoms, oxygen atoms, sulfur atoms, or double bonds in the heterocycle;

alicyclic compounds having bound to the alicyclic ring one or more substituents containing an amine moiety;

conjugated imines or a mixture thereof.

11. The method of claim 1 wherein the boron containing initiator compound comprises an organoborane amine complex having the structure

12. The method of claim 1 comprising a decomplexing agent selected from a Lewis acid, a Brø

nsted acid, an anhydride, an isocyanate, a sulfonic acid chloride, methacrylic acid, or an adduct of maleic anhydride and hydroxyethyl methacrylate.

13. The method of claim 1 wherein the adhesive further comprises an effective amount of an isocyanate containing compound;

one or more unpolymerized or partially polymerized compound having ring opening heterocyclic moieties and optionally a Lewis acid catalyst capable of initiating polymerization of the compound containing heterocyclic moieties;

one or more compound, oligomer or prepolymer having siloxane groups and reactive moieties in its backbone capable of polymerization;

one or more compound, oligomer or prepolymer having siloxane groups in its backbone which contain a moiety which when exposed to moisture forms an acid capable of decomplexing the organoborane amine complex;

or mixtures thereof.

14. The method of claim 1 wherein the adhesive comprises a polymerizable acrylate monomer.

15. The method of claim 2 further comprising a gap for receiving the adhesive said gap is positioned between part or all of the mating exterior surface of the spigot and the interior surface of the bell.

16. The method of claim 15 wherein the gap has a uniform thickness.

17. The method of claim 16 wherein the gap comprises a channel in the bell, alignment guides raised from the interior surface of the bell which contact the exterior surface of the spigot, a guide ring fitted into an end of the bell said guide ring having a smaller internal diameter than the bell, a mesh collar of constant thickness, a gasket, a serrated washer, or combinations thereof.

18. The method of claim 1 having a VOC emission of less than about 650 g/l.

19. The method of claim 1 having a VOC emission of less than about 270 g/l.

20. A method for joining an end of a first pipe having a first surface to an end of a second pipe having a second surface comprising the steps of:

(i) applying an effective amount of a curable one or two part adhesive composition to the first surface of the end of the first pipe, the second surface of the end of the second pipe or to both surfaces, wherein the adhesive comprises

(a) a boron containing initiator compound,

(b) one or more monomers, oligomers, polymers or mixtures thereof having olefinic unsaturation which is capable of polymerization by free radical polymerization, and

(c) optionally a decomplexing agent and

(ii) joining the first surface of the end of the first pipe with the second surface of the end of the second pipe.