The present disclosure is directed to a process for producing a polyoxymethylene polymer or paraformaldehyde in an environmentally friendly and sustainable manner. The polyoxymethylene polymer or paraformaldehyde can be produced so as to be carbon neutral or even carbon negative. In one aspect, the polyoxymethylene polymer or paraformaldehyde is formed from a biogas or from a recycled gas. The biogas and the recycled gas are used to produce the components needed to form the polymer.

The present disclosure is directed to a process for producing a polyoxymethylene polymer or paraformaldehyde in an environmentally friendly and sustainable manner. The polyoxymethylene polymer or paraformaldehyde can be produced so as to be carbon neutral or even carbon negative. In one aspect, the polyoxymethylene polymer or paraformaldehyde is formed from a biogas or from a recycled gas. The biogas and the recycled gas are used to produce the components needed to form the polymer.

A method for molding amorphous polyether ether ketone including steps of preparing a molten mass including polyether ether ketone, cooling a mold assembly to a temperature of at most about 200° F., and injecting the molten mass into the cooled mold assembly.

A method for molding amorphous polyether ether ketone including steps of preparing a molten mass including polyether ether ketone, cooling a mold assembly to a temperature of at most about 200° F., and injecting the molten mass into the cooled mold assembly.

There is provided an aromatic hydrocarbon formaldehyde resin obtained by reacting an aromatic hydrocarbon compound (A) represented by the following formula (1) with formaldehyde (B) in the presence of an acidic catalyst. ##STR00001##
wherein R represents an organic group having 1 to 10 carbon atoms; l represents an integer of 0 to 2, and m and n represent integers satisfying 1≦m+n≦10, m≧0 and n≧1.

There is provided an aromatic hydrocarbon formaldehyde resin obtained by reacting an aromatic hydrocarbon compound (A) represented by the following formula (1) with formaldehyde (B) in the presence of an acidic catalyst. ##STR00001##
wherein R represents an organic group having 1 to 10 carbon atoms; l represents an integer of 0 to 2, and m and n represent integers satisfying 1≦m+n≦10, m≧0 and n≧1.

The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (R.sub.G) which comprises at least one formaldehyde source and at least one initiator mixture (I.sub.G), wherein the initiator mixture (I.sub.G) comprises at least one polymerization initiator and at least one solvent of the general formula (I)
R.sup.1—O—[—R.sup.3—O—].sub.m—R.sup.2  (I), where m is 1, 2, 3 or 4; R.sup.1 and R.sup.2 are each, independently of one another, C.sub.3-C.sub.6-alkyl; R.sup.3 is C.sub.1-C.sub.5-alkylene.

The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (R.sub.G) which comprises at least one formaldehyde source and at least one initiator mixture (I.sub.G), wherein the initiator mixture (I.sub.G) comprises at least one polymerization initiator and at least one solvent of the general formula (I)
R.sup.1—O—[—R.sup.3—O—].sub.m—R.sup.2  (I), where m is 1, 2, 3 or 4; R.sup.1 and R.sup.2 are each, independently of one another, C.sub.3-C.sub.6-alkyl; R.sup.3 is C.sub.1-C.sub.5-alkylene.

Some embodiments of the present disclosure relate to a method comprising obtaining a mixture comprising at least one vinyl polymer, at least one organic acid, and at least one hydronium ion donor. In some embodiments, the method comprises reacting an —OH group of the B polymer chain segment with the at least one organic acid in the presence of the at least one hydronium ion donor, so as to form at least one polyvinyl ester. Some embodiments of the present disclosure relate to a roofing material comprising at least one reinforcement material and at least one polyvinyl ester.

Some embodiments of the present disclosure relate to a method comprising obtaining a mixture comprising at least one vinyl polymer, at least one organic acid, and at least one hydronium ion donor. In some embodiments, the method comprises reacting an —OH group of the B polymer chain segment with the at least one organic acid in the presence of the at least one hydronium ion donor, so as to form at least one polyvinyl ester. Some embodiments of the present disclosure relate to a roofing material comprising at least one reinforcement material and at least one polyvinyl ester.