Plastisol composition

JP2026097534APending Publication Date: 2026-06-16TOSOH CORP

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Patent Information

Authority / Receiving Office: JP · JP
Patent Type: Applications
Current Assignee / Owner: TOSOH CORP
Filing Date: 2024-12-04
Publication Date: 2026-06-16

AI Technical Summary

Benefits of technology

【0027】 本発明のプラスチゾル組成物は、貯蔵安定性及び低温(具体的には、80℃)加工時の機械物性、柔軟性に優れ、コート剤、特に自動車アンダーボディコート用、自動車シーラント用として優れた特性を有するものである。

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Abstract

This invention provides a plastisol composition and its applications that offer excellent storage stability, as well as superior processability, mechanical properties, and flexibility during low-temperature processing at around 80°C, making it ideal for use as a coating agent, particularly for automotive underbody coatings and automotive sealants. [Solution] A plastisol composition comprising 100 parts by weight of a vinyl chloride-vinyl acetate copolymer having an average content of vinyl acetate polymerization units of 5 to 20% by weight, 80 to 170 parts by weight of an aromatic epoxy resin, and 10 to 60 parts by weight of a flexible epoxy resin.

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Claims

1. A plastisol composition characterized by containing 100 parts by weight of a vinyl chloride-vinyl acetate copolymer having an average content of vinyl acetate polymerization units of 5 to 20% by weight, 80 to 170 parts by weight of an aromatic epoxy resin, and 10 to 60 parts by weight of a flexible epoxy resin.

2. The plastisol composition according to claim 1, characterized in that the aromatic epoxy resin is a bisphenol-type epoxy resin, and the flexible epoxy resin is one or more of the following: polyoxyalkylene-modified bisphenol-type epoxy resin, alkylene-modified bisphenol-type epoxy resin, urethane-modified bisphenol-type epoxy resin, rubber-modified bisphenol-type epoxy resin, polysulfide-modified bisphenol-type epoxy resin, and all-aliphatic epoxy resin.

3. The plastisol composition according to claim 1, characterized in that the aromatic epoxy resin is a bisphenol A type epoxy resin, and the flexible epoxy resin is one or more of the following: a polyoxyalkylene-modified bisphenol A type epoxy resin, a urethane-modified bisphenol A type epoxy resin, or a rubber-modified bisphenol A type epoxy resin.

4. The plastisol composition according to claim 1, further characterized by containing a curing agent.

5. The plastisol composition according to claim 4, characterized in that the curing agent is an amine or an epoxy modified product thereof.

6. The plastisol composition according to claim 1 or 4, characterized in that, when formed into a 2 mm thick sheet under heating conditions of 80°C for 30 minutes, it has a tensile strength of 0.50 MPa or more and a tensile elongation of 40% or more, as measured in a JIS No. 3 dumbbell test specimen in accordance with JIS K6251.

7. An automotive underbody coating agent characterized by comprising the plastisol composition described in claim 1 or 4.

8. A sealant comprising the plastisol composition described in claim 1 or 4.