Ppg Industries, Inc.

Edward L Dufford

Paul J Prucnal

Wen-Hsuan Chang

Ronald R Ambrose

John R Peffer

Wen H Chang

J Alden Erikson

William P Blackburn

Disclosed is an ungelled acrylic resin composition containing an acrylic polymer having in a molecule thereof at least one group containing a silicon atom selected from: ##STR1## each R independently is selected from the group of moieties consisting of Y, hydrogen, a C.sub.1 -C.sub.10 group joined to Si through an Si-C linkage, and OR.sup.7 in which R.sup.7 represents alkykl having at least 4 carbon atoms, aryl, alkylaryl, arylalkyl, aryloxyalkyl, or alkyloxyalkyl, wherein Y represents an easily hydrolyzable group. The acrylic resin composition, contains an amount of easily hydrolyzable Y moieties such that the ratio of the number of grams of the ungelled acrylic resin composition to equivalent of easily hydrolyzable Y moieties in the ungelled acrylic resin composition is in the range of from 40 to 667. Preferred acrylic resin compositions of the invention can be cured in the presence of atmospheric moisture and a suitable catalyst at a temperature of less than or equal to 121 degrees Celsius within 3 hours. Disclosed is a method for producing the ungelled acrylic resin composition. Also disclosed is a nonaqueous composition, particularly a nonaqueous coating composition, containing the ungelled acrylic resin composition. Preferred coating compositions containing an ungelled acrylic resin composition can be cured in the presence of atmospheric moisture and a suitable catalyst at a temperature of less than or equal to 121 degrees C. within 3 hours.

Method of preparing acrylic polymers containing hydrolyzable moieties

Disclosed is an ungelled acrylic resin composition containing an acrylic polymer having in a molecule thereof at least one group containing a silicon atom selected from: ##STR1## wherein each R independently is selected from the group of moieties consisting of Y, hydrogen, a C.sub.1 -C.sub.10 group joined to Si through an Si--C linkage, and OR.sup.7 in which R.sup.7 represents alkyl having at least 4 carbon atoms, aryl, alkylaryl, arylaklyl, aryloxyalkyl, or alkyloxyalkyl, wherein Y represents an easily hydrolyzable group. The acrylic resin composition, contains an amount of easily hydrolyzable Y moieties such that the ratio of the number of grams of the ungelled acrylic resin composition to equivalent of easily hydrolyzable Y moieties in the ungelled acrylic resin composition is in a range of from 40 to 667. Prefered acrylic resin compositions of the invention can be cured in the presence of atmospheric moisture and a suitable catalyst at a temperature of less than or equal to 121 degrees Celsius within 3 hours. Disclosed is a method for producing the ungelled acrylic resin composition. Also disclosed is a nonaqueous composition, particularly a nonaqueous coating composition, containing the ungelled acrylic resin composition. Preferred coating compositions containing an ungelled acrylic resin composition can be cured in the presence of atmospheric moisture and a suitable catalyst at a temperature of less than or equal to 121 degrees C within 3 hours.

Substrates coated with nonaqueous compositions comprising acrylic

Disclosed is an ungelled acrylic resin composition containing an acrylic polymer having in a molecule thereof at least one group containing a silicon atom selected from: ##STR1## wherein each R independently is selected from the group of moieties consisting of Y, hydrogen, a C.sub.1 -C.sub.10 group joined to Si through an Si-C linkage, and OR.sup.7 in which R.sup.7 represents alkyl having at least 4 carbon atoms, aryl, alkylaryl, arylalkyl, aryloxyalkyl, or alkyloxyalkyl, wherein Y represents an easily hydrolyzable group. The acrylic resin composition, contains an amount of easily hydrolyzable Y moieties such that the ratio of the number of grams of the ungelled acrylic resin composition to equivalent of easily hydrolyzable Y moieties in the ungelled acrylic resin composition is in a range of from 40 to 667. Preferred acrylic resin compositions of the invention can be cured in the presence of atmospheric moisture and a suitable catalyst at a temperature of less than or equal to 121 degrees Celsius within 3 hours. Disclosed is a method for producing the ungelled acrylic resin composition. Also disclosed is a nonaqueous composition, particularly a nonaqueous coating composition, containing the ungelled acrylic resin composition. Preferred coating compositions containing an ungelled acrylic resin composition can be cured in the presence of atmospheric moisture and a suitable catalyst at a temperature of less than or equal to 121 degrees C. within 3 hours.

Acrylic polymers containing hydrolyzable moieties from organosilane

Disclosed are moisture-curable compositions based on (A) ungelled, partial hydrolyzates or organosilicon-containing materials in combination with (B) acrylic addition interpolymers containing hydrolyzable silyl groups. The organosilicon-containing material for preparation of the ungelled partial hydrolysis product has an average functionality based on easily hydrolyzable Y groups attached to silicon atoms of greater than or equal to 2.4 and contains greater than or equal to 10 mole percent of at least one organosilane compound corresponding to the formula R-Si-Y.sub.3. The partial hydrolysis product is prepared using a controlled amount of water. The acrylic addition interpolymer is not particularly limited provided that it contains at least one silicon atom directly bonded to a hydrolyzable group and is compatible with the ungelled partial hydrolysis product.

Compositions based on silane hydrolyzates and vinyl polymers containing

A coating composition contains at least 15 percent by weight of an ungelled reaction product of:

Coating composition containing an ungelled reaction product as a curative

Disclosed is an ungelled partial hydrolysis product of an organosilicon-containing material, a method for preparing the partial hydrolysis product, and a composition such as a coating composition containing the partial hydrolysis product. The organosilicon-containing material for preparation of the ungelled partial hydrolysis product has an average functionality based on easily hydrolyzable Y groups attached to silicon atoms of greater than or equal to 2.4. The organosilicon-containing material for preparation of the ungelled partial hydrolysis product contains greater than or equal to 10 mole percent of at least one organosilane compound corresponding to the formula, R--Si--Y.sub.3. In the aforesaid formula, R represents hydrogen or a C.sub.1 -C.sub.10 group joined to Si through an Si--C linkage. Each Y in the aforesaid formula represents an easily hydrolyzable group. The partial hydrolysis product is prepared by hydrolyzing a portion of the easily hydrolyzable groups of the organosilane compound with a controlled amount of water. The amount of water employed in the controlled hydrolysis is determined according to the following formula,

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Sarver, PA, United States of America

Edward L Dufford