Provided herein are pretreatments that can be used in solvent cementing, including pretreatment compositions comprising a polyamine. Also provided are methods of using pretreatment compositions, including for use in preparing a surface for solvent cement bonding.

Provided herein are pretreatments that can be used in solvent cementing, including pretreatment compositions comprising a polyamine. Also provided are methods of using pretreatment compositions, including for use in preparing a surface for solvent cement bonding.

Provided herein are pretreatments that can be used in solvent cementing, including pretreatment compositions comprising a polyamine. Also provided are methods of using pretreatment compositions, including for use in preparing a surface for solvent cement bonding.

Adhesive formulations for forming a fluorinated poly(imide-phthalonitrile) thermoset polymer are provided. Such an adhesive formulation may comprise a fluorinated imide-phthalonitrile oligomer having Formula IV ##STR00001##
wherein R.sub.1 is an unsubstituted or substituted aryl group and does not comprise an ether group; R.sub.2 is an unsubstituted or substituted aryl group and does not comprise an ether group; at least one of R.sub.1 and R.sub.2 comprises a fluorine substituent; and n has a value of from 1 to 30.

Adhesive formulations for forming a fluorinated poly(imide-phthalonitrile) thermoset polymer are provided. Such an adhesive formulation may comprise a fluorinated imide-phthalonitrile oligomer having Formula IV ##STR00001##
wherein R.sub.1 is an unsubstituted or substituted aryl group and does not comprise an ether group; R.sub.2 is an unsubstituted or substituted aryl group and does not comprise an ether group; at least one of R.sub.1 and R.sub.2 comprises a fluorine substituent; and n has a value of from 1 to 30.

The present disclosure provides a PVC or CPVC solvent cement and a composition for forming a PVC or CPVC coating on an object. The solvent cement and the coating composition each include one or more caprolactam-derived solvents and a polymer selected from the group of polyvinyl chloride and chlorinated polyvinyl chloride. The one or more caprolactam-derived solvents include a linear alkyl group of 1, 2 or 4 unsubstituted carbons or an alkoxymethyl group of 2 or 3 unsubstituted carbons bonded to a nitrogen heteroatom.

The present disclosure provides a PVC or CPVC solvent cement and a composition for forming a PVC or CPVC coating on an object. The solvent cement and the coating composition each include one or more caprolactam-derived solvents and a polymer selected from the group of polyvinyl chloride and chlorinated polyvinyl chloride. The one or more caprolactam-derived solvents include a linear alkyl group of 1, 2 or 4 unsubstituted carbons or an alkoxymethyl group of 2 or 3 unsubstituted carbons bonded to a nitrogen heteroatom.

The present invention relates to a PVC/CPVC solvent cement formulations using less toxic ketonic solvent mixtures comprising of first three members in homologous series of ketones having one low boiling ketone with boiling point less than 70 C. and solvent mixture having two medium boiling ketones with boiling point around 100 C. The solvent cement formulation disclosed in the present invention is less toxic, low VOC and fast curing method of preparing said composition comprising PVC/CPVC solvent cement, which is less toxic, low VOC, fast curing and cost effective.

The present invention relates to a PVC/CPVC solvent cement formulations using less toxic ketonic solvent mixtures comprising of first three members in homologous series of ketones having one low boiling ketone with boiling point less than 70 C. and solvent mixture having two medium boiling ketones with boiling point around 100 C. The solvent cement formulation disclosed in the present invention is less toxic, low VOC and fast curing method of preparing said composition comprising PVC/CPVC solvent cement, which is less toxic, low VOC, fast curing and cost effective.