Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-09-16
1998-06-30
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
525100, 525104, 525438, 525446, 528 40, C08K 534
Patent
active
057734976
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a novel crosslinking resin composition. More particularly, the present invention is concerned with a novel crosslinking resin composition comprising: a carboxyl group-containing resin as a main agent; a cyclic or chain silicone compound as a curing agent, which contains at least two epoxy groups in one molecule thereof and which is free of a silanol group, a hydrolyzable silyl group and a vinyl polymer structure; and a medium. The crosslinking resin composition not only exhibits excellent storage stability, but is also capable of providing, upon being crosslinked, a cured resin having excellent weatherability, acid resistance, solvent resistance, stain resistance and surface smoothness. Therefore, the crosslinking resin composition of the present invention can be advantageously used for providing coating compositions, such as paints, sealants and the like.
2. Prior Art
Some vinyl polymers having alkoxysilyl groups at the terminals thereof and/or in side chains thereof and coating compositions containing the same are disclosed in, for example, Unexamined Japanese Patent Application Laid-Open Specification Nos. 54-36395 (corresponding to U.S. Pat. No. 4,334,036), 54-40893 and 54-123192. These vinyl polymers have excellent weatherability and acid resistance. However, these vinyl polymers have a problem with their stability. In use, these vinyl polymers having alkoxy silyl groups are used as a main agent in combination with a curing catalyst, and the curing of the vinyl polymer is performed by crosslinking through hydrolysis condensation of the alkoxy silyl groups with the water contained in the air. Therefore, when the vinyl polymer contains water as a contaminant, the storage stability of the vinyl polymer is likely to be lower. Further, when this vinyl polymer is formulated into a paint by using a pigment, the storage stability of the paint may be adversely affected by the water contained in the pigment.
U.S. Pat. No. 5,210,150 discloses a melt-moldable, moisture-curing adhesive using a reaction product of a vinyl resin having carboxylic acid groups with an epoxy silane. As examples of epoxy silanes, glycidoxypropyltrimethoxysilane and .beta.-(3,4-epoxycyclohexyl)ethyltrimethoxysilane are described. These epoxy silanes have only one epoxy group in one molecule thereof, so that a curing reaction does not proceed between such epoxy silanes and carboxyl groups. Further, since the epoxy silane capable of reacting with a vinyl resin having carboxylic acid groups contains hydrolyzable methoxysilyl groups, the above-mentioned reaction product inherently has poor storage stability. Furthermore, when the above-mentioned reaction product is formulated into a paint by using a pigment, the storage stability of the paint may be adversely affected by the water contained in the pigment.
British Patent No. 2247461 (corresponding to Unexamined Japanese Patent Application Laid-Open Specification No. 4-110350) discloses a curing resin comprising: (I) a polysiloxane resin comprising a reaction product of (A) a silane compound having at least one hydroxyl group and/or hydrolyzable group, which is directly bonded to the silicon atom thereof, with (B) a silane compound having at least one hydroxyl group and/or hydrolyzable group which is directly bonded to the silicon atom thereof and at least one epoxy group (thus, on the average, the polysiloxane has, per molecule thereof, at least one epoxy group and at least two hydroxyl groups and/or at least two hydrolyzable groups which are bonded to the silicon atom thereof); and (II) a resin having hydroxyl groups and carboxyl groups. The curing resin proposed in the above British patent has problems in that a silanol group which is formed by the above-mentioned direct bonding of the hydroxyl group to the silicon atom is highly susceptible to condensation. The resulting resin having such a silanol group has poor stability and, therefore, must be stored and handled with great care. The hydrolyzable gro
REFERENCES:
patent: 4032487 (1977-06-01), Columbus
patent: 4093673 (1978-06-01), Chang et al.
patent: 4485130 (1984-11-01), Lampin et al.
patent: 4576999 (1986-03-01), Eckberg
patent: 4640967 (1987-02-01), Eckberg
patent: 5026793 (1991-06-01), Nakai et al.
patent: 5202441 (1993-04-01), Suhadolnik et al.
patent: 5206328 (1993-04-01), Okamura et al.
patent: 5210150 (1993-05-01), Prejean
patent: 5292827 (1994-03-01), Raleigh et al.
patent: 5322868 (1994-06-01), Valet et al.
patent: 5338799 (1994-08-01), Ohsugi et al.
patent: 5411996 (1995-05-01), Eckberg et al.
Ueyanagi Kaoru
Yamamoto Masahiro
Asahi Kasei Kogyo Kabushiki Kaisha
Marquis Melvyn I.
LandOfFree
Crosslinking resin composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crosslinking resin composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crosslinking resin composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1860000