A process tear production of high molecular weight polyamide polymers, such as 6/66 copolymers, using a reactant stream that includes at least one lactam and cyclic oligomers. The stream is reacted with at least one diamine at an elevated temperature ring-open the cyclic oligomers to produce amide pre-polymers that are end-capped with amine groups. The pre-polymers are then reacted with at least one diacid at an elevated temperature to form polyamide 6/66 copolymers. The cyclic oligomers may be formed as by-products during standard polymerization of polyamide polymers from monomers such as caprolactam, hexamethylene diamine and adipic acid.

The method for manufacturing a photosensitive resin composition of the present invention is a method for manufacturing a photosensitive resin composition containing an amide bond-containing precursor having a repeating unit represented by General Formula (1), the method including a step of obtaining an activated carboxylic acid material by activating a carboxylic acid compound represented by General Formula (2) and a step of obtaining the amide bond-containing precursor by allowing an amine compound represented by General Formula (3) to act on the activated carboxylic acid material, in which at least either the step of obtaining an activated carboxylic acid material and the step of obtaining the amide bond-containing precursor is performed in a solvent containing a carbonyl group-containing heterocyclic compound.

##STR00001##

The method for manufacturing a photosensitive resin composition of the present invention is a method for manufacturing a photosensitive resin composition containing an amide bond-containing precursor having a repeating unit represented by General Formula (1), the method including a step of obtaining an activated carboxylic acid material by activating a carboxylic acid compound represented by General Formula (2) and a step of obtaining the amide bond-containing precursor by allowing an amine compound represented by General Formula (3) to act on the activated carboxylic acid material, in which at least either the step of obtaining an activated carboxylic acid material and the step of obtaining the amide bond-containing precursor is performed in a solvent containing a carbonyl group-containing heterocyclic compound.

##STR00001##

The present invention relates to the use of a mixture of at least one semi-crystalline aliphatic polyamide and at least one amorphous polyamide, wherein the at least one semi-crystalline aliphatic polyamide is obtained by polycondensation: of at least one C.sub.6 to C.sub.18, preferentially C.sub.10 to C.sub.18, more preferentially C.sub.10 to C.sub.12 amino acid, or at least one C.sub.6 to C.sub.18, preferentially C.sub.10 to C.sub.18, more preferentially C.sub.10 to C.sub.12 lactam, or at least one C.sub.4-C.sub.36, preferentially C.sub.5-C.sub.18, preferentially C.sub.5-C.sub.12, more preferentially C.sub.10-C.sub.12 diamine Ca, with at least one C.sub.4-C.sub.36, preferentially C.sub.6-C.sub.18, preferentially C.sub.6-C.sub.12, more preferentially C.sub.10-C.sub.12 dicarboxylic acid Cb; in order to prepare a semi-crystalline composition, the modulus of which does not vary by more than 25% within the temperature range from 10° C. to 40° C.

Disclosed are catalysts comprised of platinum and gold. The catalysts are generally useful for the selective oxidation of compositions comprised of a primary alcohol group and at least one secondary alcohol group wherein at least the primary alcohol group is converted to a carboxyl group. More particularly, the catalysts are supported catalysts including particles comprising gold and particles comprising platinum, wherein the molar ratio of platinum to gold is in the range of about 100:1 to about 1:4, the platinum is essentially present as Pt(0) and the platinum-containing particles are of a size in the range of about 2 to about 50 nm. Also disclosed are methods for the oxidative chemocatalytic conversion of carbohydrates to carboxylic acids or derivatives thereof. Additionally, methods are disclosed for the selective oxidation of glucose to glucaric acid or derivatives thereof using catalysts comprising platinum and gold. Further, methods are disclosed for the production of such catalysts.

Disclosed are catalysts comprised of platinum and gold. The catalysts are generally useful for the selective oxidation of compositions comprised of a primary alcohol group and at least one secondary alcohol group wherein at least the primary alcohol group is converted to a carboxyl group. More particularly, the catalysts are supported catalysts including particles comprising gold and particles comprising platinum, wherein the molar ratio of platinum to gold is in the range of about 100:1 to about 1:4, the platinum is essentially present as Pt(0) and the platinum-containing particles are of a size in the range of about 2 to about 50 nm. Also disclosed are methods for the oxidative chemocatalytic conversion of carbohydrates to carboxylic acids or derivatives thereof. Additionally, methods are disclosed for the selective oxidation of glucose to glucaric acid or derivatives thereof using catalysts comprising platinum and gold. Further, methods are disclosed for the production of such catalysts.

A laminated multilayer polymer containing film (P) comprises at least one layer comprising at least one copolyamide wherein the copolyamide is prepared by polymerizing the following components: (A) 15% to 84% by weight of at least one lactam, (B) 16% to 85% by weight of a monomer mixture (M) comprising the following components: (B1) at least one C32-C40 dimer acid and (B2) at least one C4-C12 diamine, where the percentages by weight of components (A) and (B) are each based on the sum total of the percentages by weight of components (A) and (B) and wherein the laminated multilayer polymer containing film (P) comprises at least one further layer, where the at least one further layer is selected from the group consisting of (i) at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetates), polyethylene terephthalates, polyvinylidene chlorides, maleic anhydride-grafted polyolefins, polyesters and ionomers and (ii) aluminum metal and/or tin metal.

A laminated multilayer polymer containing film (P) comprises at least one layer comprising at least one copolyamide wherein the copolyamide is prepared by polymerizing the following components: (A) 15% to 84% by weight of at least one lactam, (B) 16% to 85% by weight of a monomer mixture (M) comprising the following components: (B1) at least one C32-C40 dimer acid and (B2) at least one C4-C12 diamine, where the percentages by weight of components (A) and (B) are each based on the sum total of the percentages by weight of components (A) and (B) and wherein the laminated multilayer polymer containing film (P) comprises at least one further layer, where the at least one further layer is selected from the group consisting of (i) at least one further polymer (FP) selected from the group consisting of polyolefins, poly(ethylene-vinyl alcohols), poly(ethylene-vinyl acetates), polyethylene terephthalates, polyvinylidene chlorides, maleic anhydride-grafted polyolefins, polyesters and ionomers and (ii) aluminum metal and/or tin metal.

An end capped condensation polymer may be formed by heating a condensation polymer in the presence of an end capping compound to form cleaved condensation polymer reacting at least a portion of the cleaved condensation polymer with the end capping compound to form the end capped condensation polymer. The end capped condensation polymers may be used to form additive manufactured articles having high solids loading and improved processing due to improved rheological behavior.

The present disclosure provides a leaching process and resulting composition which prevents or substantially reduces agglomeration of polyamide 6/66 copolymers. The leaching process includes applying hot water in the presence of an agglomeration inhibitor to the polyamide 6/66 copolymers in order to separate unreacted caprolactam and small molecular weight oligomers from the copolymers while preventing or substantially reducing agglomeration of the copolymers.