Patents Assigned to Stevens Sciences Corp.
  • Paint stripper and varnish remover compositions, methods for making these compositions and methods for removing paint and other polymeric coatings from flexible and inflexible surfaces
    Patent number: 5288335
    Abstract: The present invention relates to non-toxic, non-flammable, safe compositions employing primarily biodegradable components for use in removing and stripping paint, varnishes and stains from hard and/or flexible surfaces. The compositions avoid the use of methylene chloride, methanol, toluol or acetone. Paint stripper compositions of the present invention have flash points above about 120.degree. F. and an absence of low-boiling VOC's comprising:a. about 10% to about 60% by weight of a terpene compound containing at least 10 carbon atoms;b. about 10% to about 50% by weight of N-methyl pyrrolidone or its equivalent; andc. about 2% to about 20% by weight of a terpene emulsifying surfactant.Compositions of the present invention may further comprise at least one of the following: about 5% to about 15% by weight of a solvent extender or bulking agent, about 10% to about 60% of a high flash point, high K.sub.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: February 22, 1994
    Assignee: Stevens Sciences Corp.
    Inventor: Edwin Stevens
  • Paint stripper and varnish remover compositions containing organoclay rheological additives, methods for making these compositions and methods for removing paint and other polymeric coatings from flexible and inflexible surfaces
    Patent number: 5167853
    Abstract: The present invention relates to non-toxic, non-flammable, safe compositions employing primarily biodegradable components for use in removing and stripping paint, varnishes and stains from hard and/or flexible surfaces. The compositions generally avoid the use of methylene chloride, methanol, toluol or acetone.Paint stripper compositions of the present invention have flash points above about 120.degree. F. and an absence of low-boiling VOC's comprising:a. about 0% to about 60% by weight of a terpene compound containing at least 10 carbon atoms;b. about 10% to about 69% by weight of N-methyl pyrrolidone or its equivalent; andc. about 0% to about 20% by weight of an emulsifying surfactant.Compositions of the present invention may further comprise one or more of the following: about 5% to about 15% by weight of a solvent extender or bulking agent, about 5% to about 60% of a high flash point, high K.sub.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: December 1, 1992
    Assignee: Stevens Sciences, Corp.
    Inventor: Edwin Stevens
  • Paint stripper and varnish remover compositions, methods for making these compositions and methods for removing paint and other polymeric coatings from flexible and inflexible surfaces
    Patent number: 5124062
    Abstract: The present invention relates to non-toxic, non-flammable, safe compositions employing primarily biodegradable components for use in removing and stripping paint, varnishes and stains from hard and/or flexible surfaces. The compositions avoid the use of methylene chloride, methanol, toluol or acetone. Paint stripper compositions of the present invention have flash points above about 120.degree. F. and an absence of low-boiling VOC's comprising:a. about 10% to about 60% by weight of a terpene compound containing at least 10 carbon atoms;b. about 10% to about 50% by weight of N-methyl pyrrolidone or its equivalent; andc. about 2% to about 20% by weight of a terpene emulsifying surfactant.Compositions of the present invention may further comprise at least one of the following: about 5% to about 15% by weight of a solvent extender or bulking agent, about 10% to about 60% of a high flash point, high K.sub.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: June 23, 1992
    Assignee: Stevens Sciences Corp.
    Inventor: Edwin Stevens
  • Paint stripper and varnish remover compositions containing organoclay rheological additives, methods for making these compositions and methods for removing paint and other polymeric coatings from flexible and inflexible surfaces
    Patent number: 5098591
    Abstract: The present invention relates to non-toxic, non-flammable, safe compositions employing primarily biodegradable components for use in removing and stripping paint, varnishes and stains from hard and/or flexible surfaces. The compositions generally avoid the use of methylene chloride, methanol, toluol or acetone.Paint stripper compositions of the present invention have flash points above about 120.degree. F. and an absence of low-boiling VOC's comprising:a. about 0% to about 60% by weight of a terpene compound containing at least 10 carbon atoms;b. about 10% to about 69% by weight of N-methyl pyrrolidone or its equivalent; andc. about 0% to about 20% by weight of an emulsifying surfactant.Compositions of the present invention may further comprise one or more of the following: about 5% to about 15% by weight of a solvent extender or bulking agent, about 5% to about 60% of a high flash point, high K.sub.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: March 24, 1992
    Assignee: Stevens Sciences Corp.
    Inventor: Edwin Stevens