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Porous, heat-sensitive substrates coated with synthetic resins
| Details |
Inventors: Proksch, Emil; Eschweiler, Helmut;
Assignee: Eternit-Werke Ludwig Hatschek & UCB,S.A. (Saint-Gilles-lex-Bruxelles)
Primary Examiner: Newsome; J. H.
Assistant Examiner:
Attorney, Agent or Firm: Haseltine, Lake & Waters
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.degree.C. and 30 to 90 percent by weight of at least one ethylenically unsaturated compound having a boiling point of at least 190.degree.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. |
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DETAILED DESCRIPTION What we claim is: 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.
degree.
C.
and 30 to 90 percent by weight of at least one ethylenically unsaturated compound having a boiling point of at least 190.
degree.
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.
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
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