Animal environmental-friendly solid glue and preparation method thereof

Abstract

The invention discloses animal environmental-friendly solid glue. The animal environmental-friendly solid glue comprises 10.0% to 70.0% of water, 1.0% to 10.0% of glycerol, 1.0% to 6.0% of propylene glycol, 20.0% to 50.0% of animal glue, 1.0% to 10.0% of a polyhydroxyl material, 0.01% to 0.5% of a catalyst, 1.0% to 10.0% of higher fatty acid, 0.5% to 5.0% of caustic soda flakes, 0% to 0.5% of a defoamer, 0.1% to 0.6% of an antioxidant and 0.1% to 0.5% of a preservative. A preparation method of the animal environmental-friendly solid glue comprises modifying animal glue to obtain base glue, adding the base glue, glycerol, propylene glycol and defoamer into a reactor, heating the materials to 60-80 DEG C, adding higher fatty acid into the materials, then adding the antioxidant and preservative into the materials, heating the materials to 75 to 80 DEG C, carrying out standing defoaming, discharging the defoamed materials, carrying out loading and carrying out cooling to obtain the solid glue. The animal environmental-friendly solid glue has good bonding performances, a fast drying rate and is environmentally friendly.

Description

technical field [0001] The invention relates to an environment-friendly solid glue, in particular to an animal-based environment-friendly solid glue and a preparation method thereof. Background technique [0002] Adhesive is a substance used to glue the surfaces of homogeneous or heterogeneous objects together. It is classified according to form, including solid glue and liquid glue. Among them, liquid glue is generally made of starch, animal and vegetable fat, or a synthetic material with a certain viscosity, which is dissolved in an aqueous organic liquid, and there are problems such as inconvenient portability and long drying and bonding time. Gum solids are contained in slidable, closable sleeves of adhesive or water-dispersible polymers (especially polyvinylpyrrolidone, starch, polyvinyl alcohol) that can be dissolved in an aqueous organic liquid phase, Anticoagulants, fatty acid salts, solvents, preservatives, etc. are the main raw materials for solid adhesives that a...

AI Technical Summary

Problems solved by technology

[0003] At present, the solid glue on the market generally uses starch, polyvinylpyrrolidone, polyvinyl alcohol or viscous substances to be directly heated and dissolved, and an alkali metal salt of an excipient higher fatty acid (especially those with a carbon number in the range of 12 to 22) is added. Form a solid glue stick with a certain hardness. For example, the Chinese invention patent "A Solid Glue and Its Making Method" with the application number of 200910099252.3 (the application publication number being CN 101899272 A) discloses a solid glue stick. It is made by mixing water-based emulsion as adhesive, PVP as tackifier, high-level fatty acid sodium as excipient, water, non-drying oil and wax, and preservatives. A thin film is formed on the surface, which affects the coatability, and the cost of raw materials used is relatively high

The solid glue prepared with polyvinyl alcohol as the adhesive is prepared by adding a cross-linking agent to the PVA solution for modification and then adding excipients. The general cross-linking agent is an aldehyde substance. Such as formaldehyde, acetaldehyde etc., make solid glue stick with formaldehyde flavor cross-linking agent modified PVA as in the document "The Development of Symphony Type Solid Glue Stick" ("Zhejiang Chemical Industry", the 36th volume first period in 2015), its Glue sticks have poor applicability and poor viscosity. Glue sticks also contain residues of formaldehyde and acetaldehyde. Long-term exposure will affect human health, especially for susceptible groups such as children and students.

The patent application whose application number is 201310436284.4 (application publication number is CN103497702 A) discloses a kind of solid glue with starch as raw material. It is easy to thin, the color of the colloid turns yellow, etc. In addition, it dries quickly after sizing, and the position of the object to be adhered cannot be adjusted according to the needs. After drying, the brittleness increases and the adhesive ability will decline with time.

Invention patent CN85105660 "Solid Viscose" introduces a kind of solid glue made of animal colloid as an adhesive, and the modifier used is borax, and borax is a reproductive toxic substance, which is listed as Substances of very high concern, if unreacted, still remain in the glue stick, which is harmful to human health