Porous, heat-sensitive substrates coated with synthetic resins

• US 3,935,364 A
• Filed: 01/11/1974
• Issued: 01/27/1976
• Est. Priority Date: 10/30/1970
• Status: Expired due to Term

• Current Assignee: Eternit-Werke Ludwig Hatschek & UCB SA
• Original Assignee: Eternit-Werke Ludwig Hatschek & UCB SA
• Inventors: Eschweiler, Helmut, Proksch, Emil
• Primary Examiner(s): Newsome, J. H.
• Application Number:
  US05/432,487
• Time in Patent Office: 746 Days
• Field of Search: 117/93.31, 260/29.6 RB, 260/875, 204/159.15, 427/44, 427/54, 428/304, 428/316, 428/443, 428/454, 428/512, 428/513, 428/514, 428/539
• US Class Current: 428/292.4
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: B05D 3/068 using ionising radiations (gamma, X, electrons)
• CPC Class Codes: C04B 41/45 Coating or impregnating paints C09D, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements ion-implantation C04B41/0027
• CPC Class Codes: C04B 41/463 Organic solvents
• CPC Class Codes: C04B 41/48 Macromolecular compounds
• CPC Class Codes: C08F 291/00 Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
• CPC Class Codes: C09D 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 C09D159/00 - C09D187/00
• CPC Class Codes: Y10T 428/249925 Fiber-containing wood product [e.g., hardboard, lumber, or wood board, etc.]
• CPC Class Codes: Y10T 428/249932 Fiber embedded in a layer derived from a water-settable material [e.g., cement, gypsum, etc.]
• CPC Class Codes: Y10T 428/249964 Fibers of defined composition
• CPC Class Codes: Y10T 428/249965 Cellulosic
• CPC Class Codes: Y10T 428/31652 Of asbestos
• CPC Class Codes: Y10T 428/31899 Addition polymer of hydrocarbon[s] only
• CPC Class Codes: Y10T 428/31902 Monoethylenically unsaturated
• CPC Class Codes: Y10T 428/31906 Ester, halide or nitrile of addition polymer

Abstract

Heat-sensitive porous substrates such as wood, plywood, plyboard, particleboard, fiberboard, cardboard, paper, fiber cement, asbestos cement, concrete and natural stone are coated with a synthetic resin by mixing an aqueous dispersion of 100 parts by weight of a saturated synthetic resin with 2 to 40 parts by weight of an organic liquid consisting of a mixture of 70 to 10 percent by weight of at least one mono ethylenically unsaturated compound having a boiling point of less than 190°C. and 30 to 90 percent by weight of at least one ethylenically unsaturated compound having a boiling point of at least 190°C. in order to swell the resin particles, applying the mixture to the substrate to form a film thereon and hardening the film with UV radiation or with electron radiation to form a hard smooth surface coating on the substrate.

Claims

1. An article, comprising a heat-sensitive porous substrate having a smooth, hard resin surface coating thereon, said coating comprising a room temperature cured mixture of (a) 100 parts by weight of at least one saturated synthetic resin which normally has a minimum filmforming temperature higher than room temperature on said porous substrate and (b) 2 to 40 parts by weight of an organic liquid which is a swelling agent for said resin, said liquid consisting of 70 to 10 percent by weight of at least one mono-ethylenically unsaturated compound having a boiling point of less than 190°

C. and 30 to 90 percent by weight of at least one ethylenically unsaturated compound having a boiling point of at least 190°

C.

2. An article according to claim 1 wherein said coating contains a least one member of the group consisting of pigments and fillers.

3. An article according to claim 1 wherein said coating contains at least 0.05 percent by weight of a photo initiator and a UV-transparent filler.

4. An article according to claim 1 wherein said heat-sensitive porous substrate is a water- or humidity-containing material selected from the group consisting of wood, plywood, plyboard, particleboard, fiberboard, cardboard, paper, fiber cement, asbestos cement, concrete and natural stone.

5. An article according to claim 1 wherein said saturated synthetic resin is at least one saturated synthetic resin selected from the group consisting of vinylic, acrylic, styrenic and urethane resins.

6. An article according to claim 1 wherein said coating contains at least 0.05 percent by weight of a photoinitiator.

17. A process for the preparation of the article of claim 1 comprising coating said substrate with a mixture of said organic liquid and an aqueous dispersion of said synthetic resin to form a film on said substate and exposing said film-coated substrate to UV- or electron-radiation to harden said film.

18. A process according to claim 17, wherein said aqueous dispersion comprises 20 to 60 percent by weight of said synthetic resin.

7. An article comprising a heat-sensitive porous substrate having smooth, hard resin surface coating thereon, said coating comprising a room temperature cured mixture of (a) 100 parts by weight of at least one saturated synthetic resin which normally has a minimum film-forming temperature higher than room temperature on said porous substrate and (b) 2 to 40 parts by weight of an organic liquid which is a swelling agent for said resin, said liquid consisting of 70 to 10 percent by weight of at least one monoethylenically unsaturated compound selected from the group of acrylic, methacrylic, vinylic, styrenic and allylic monomers having a boiling point of less than 190°

C and 30 to 90 percent by weight of at least one ethylenically unsaturated compound having a boiling point of at least 190°

C and selected from the group consisting of acrylic and methacrylic esters obtained by partial or complete esterification of polyalcohols, allylic esters of poly-basic acids, maleic-unsaturated acids, maleic-unsaturated acid anhydrides and divinyl- or polyvinyl- substituted aromatic hydrocarbons.

8. An article according to claim 7 wherein said coating contains at least one member of the group consisting of pigments and fillers.

9. An article according to claim 7 wherein said coating contains at least 0.05 percent by weight of a photo initiator and a UV-transparent filler and wherein said final hardening of said film is done by exposure to UV radiation.

10. An article according to claim 7 wherein said heat-sensitive porous substrate is a water-or humidity-containing material selected from the group consisting of wood, plywood, plyboard, particleboard, fiberboard, cardboard, paper, fiber cement, asbestos cement, concrete and natural stone.

11. An article according to claim 7 wherein said saturated synthetic resin is selected from the group consisting of vinylic, acrylic, styrenic and urethane resins.

12. An article according to claim 7 wherein said coating contains at least 0.05 percent by weight of a photoinitiator and wherein said final hardening of said film is done by exposure to UV radiation.

13. An article comprising a heat-sensitive, water- or humidity-containing porous substrate selected from the group consisting of wood, plywood, plyboard, particle-board, fiber-board, cardboard, paper, fiber cement, asbestos cement, concrete and natural stone, having a smooth hard resin surface coating thereon, said coating comprising room temperature cured mixture comprising (a) 100 parts by weight of at least one saturated synthetic resin selected from the group consisting of vinylic, acrylic, styrenic and urethane resins and which normally has a minimum film temperature higher than room temperature on said porous substrate and (b) 2 to 40 parts by weight of an organic liquid which is a swelling agent for said resin, said liquid consisting of 70 to 10 percent by weight of at least one monoethylenically unsaturated compound selected from the group consisting of acrylic, methacrylic, vinylic, styrenic and allylic monomers having a boiling point of less than 190°

C and 30 to 90 percent by weight of at least one ethylenically unsaturated compound having a boiling point of at least 190°

C and selected from the group consisting of acrylic and methacrylic esters obtained by partial or complete esterification of polyalcohols, allylic esters of polybasic acids, maleic-unsaturated acids, maleic-unsaturated acid anhydrides and divinyl- or polyvinyl-substituted aromatic hydrocarbons.

14. An article according to claim 13 wherein said coating contains at least one member of the group consisting of pigments and fillers.

15. An article according to claim 13 wherein said coating contains at least 0.05 percent by weight of a photo initiator and a UV-transparent filler and wherein said final hardening of said film is done by exposure to UV radiation.

16. An article according to claim 13 wherein said coating contains at least 0.05 percent by weight of a photoinitiator and wherein said final hardening of said film is done by exposure to UV radiation.